- 07 Oct, 2019 40 commits
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Paolo Abeni authored
[ Upstream commit b406472b ] Since commit c09551c6 ("net: ipv4: use a dedicated counter for icmp_v4 redirect packets") we use 'n_redirects' to account for redirect packets, but we still use 'rate_tokens' to compute the redirect packets exponential backoff. If the device sent to the relevant peer any ICMP error packet after sending a redirect, it will also update 'rate_token' according to the leaking bucket schema; typically 'rate_token' will raise above BITS_PER_LONG and the redirect packets backoff algorithm will produce undefined behavior. Fix the issue using 'n_redirects' to compute the exponential backoff in ip_rt_send_redirect(). Note that we still clear rate_tokens after a redirect silence period, to avoid changing an established behaviour. The root cause predates git history; before the mentioned commit in the critical scenario, the kernel stopped sending redirects, after the mentioned commit the behavior more randomic. Reported-by:
Xiumei Mu <xmu@redhat.com> Fixes: 1da177e4 ("Linux-2.6.12-rc2") Fixes: c09551c6 ("net: ipv4: use a dedicated counter for icmp_v4 redirect packets") Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Acked-by:
Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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David Ahern authored
[ Upstream commit 2d819d25 ] Rajendra reported a kernel panic when a link was taken down: [ 6870.263084] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 [ 6870.271856] IP: [<ffffffff8efc5764>] __ipv6_ifa_notify+0x154/0x290 <snip> [ 6870.570501] Call Trace: [ 6870.573238] [<ffffffff8efc58c6>] ? ipv6_ifa_notify+0x26/0x40 [ 6870.579665] [<ffffffff8efc98ec>] ? addrconf_dad_completed+0x4c/0x2c0 [ 6870.586869] [<ffffffff8efe70c6>] ? ipv6_dev_mc_inc+0x196/0x260 [ 6870.593491] [<ffffffff8efc9c6a>] ? addrconf_dad_work+0x10a/0x430 [ 6870.600305] [<ffffffff8f01ade4>] ? __switch_to_asm+0x34/0x70 [ 6870.606732] [<ffffffff8ea93a7a>] ? process_one_work+0x18a/0x430 [ 6870.613449] [<ffffffff8ea93d6d>] ? worker_thread+0x4d/0x490 [ 6870.619778] [<ffffffff8ea93d20>] ? process_one_work+0x430/0x430 [ 6870.626495] [<ffffffff8ea99dd9>] ? kthread+0xd9/0xf0 [ 6870.632145] [<ffffffff8f01ade4>] ? __switch_to_asm+0x34/0x70 [ 6870.638573] [<ffffffff8ea99d00>] ? kthread_park+0x60/0x60 [ 6870.644707] [<ffffffff8f01ae77>] ? ret_from_fork+0x57/0x70 [ 6870.650936] Code: 31 c0 31 d2 41 b9 20 00 08 02 b9 09 00 00 0 addrconf_dad_work is kicked to be scheduled when a device is brought up. There is a race between addrcond_dad_work getting scheduled and taking the rtnl lock and a process taking the link down (under rtnl). The latter removes the host route from the inet6_addr as part of addrconf_ifdown which is run for NETDEV_DOWN. The former attempts to use the host route in __ipv6_ifa_notify. If the down event removes the host route due to the race to the rtnl, then the BUG listed above occurs. Since the DAD sequence can not be aborted, add a check for the missing host route in __ipv6_ifa_notify. The only way this should happen is due to the previously mentioned race. The host route is created when the address is added to an interface; it is only removed on a down event where the address is kept. Add a warning if the host route is missing AND the device is up; this is a situation that should never happen. Fixes: f1705ec1 ("net: ipv6: Make address flushing on ifdown optional") Reported-by:
Rajendra Dendukuri <rajendra.dendukuri@broadcom.com> Signed-off-by:
David Ahern <dsahern@gmail.com> Reviewed-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 6af1799a ] This began with a syzbot report. syzkaller was injecting IPv6 TCP SYN packets having a v4mapped source address. After an unsuccessful 4-tuple lookup, TCP creates a request socket (SYN_RECV) and calls reqsk_queue_hash_req() reqsk_queue_hash_req() calls sk_ehashfn(sk) At this point we have AF_INET6 sockets, and the heuristic used by sk_ehashfn() to either hash the IPv4 or IPv6 addresses is to use ipv6_addr_v4mapped(&sk->sk_v6_daddr) For the particular spoofed packet, we end up hashing V4 addresses which were not initialized by the TCP IPv6 stack, so KMSAN fired a warning. I first fixed sk_ehashfn() to test both source and destination addresses, but then faced various problems, including user-space programs like packetdrill that had similar assumptions. Instead of trying to fix the whole ecosystem, it is better to admit that we have a dual stack behavior, and that we can not build linux kernels without V4 stack anyway. The dual stack API automatically forces the traffic to be IPv4 if v4mapped addresses are used at bind() or connect(), so it makes no sense to allow IPv6 traffic to use the same v4mapped class. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
syzbot <syzkaller@googlegroups.com> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 8353da9f ] Fix NULL-pointer dereference on tty open due to a failure to handle a missing interrupt-in endpoint when probing modem ports: BUG: kernel NULL pointer dereference, address: 0000000000000006 ... RIP: 0010:tiocmget_submit_urb+0x1c/0xe0 [hso] ... Call Trace: hso_start_serial_device+0xdc/0x140 [hso] hso_serial_open+0x118/0x1b0 [hso] tty_open+0xf1/0x490 Fixes: 542f5482 ("tty: Modem functions for the HSO driver") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Haishuang Yan authored
[ Upstream commit 0e141f75 ] erspan driver calls ether_setup(), after commit 61e84623 ("net: centralize net_device min/max MTU checking"), the range of mtu is [min_mtu, max_mtu], which is [68, 1500] by default. It causes the dev mtu of the erspan device to not be greater than 1500, this limit value is not correct for ipgre tap device. Tested: Before patch: # ip link set erspan0 mtu 1600 Error: mtu greater than device maximum. After patch: # ip link set erspan0 mtu 1600 # ip -d link show erspan0 21: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1600 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 0 Fixes: 61e84623 ("net: centralize net_device min/max MTU checking") Signed-off-by:
Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by:
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Vishal Kulkarni authored
[ Upstream commit 6b517374 ] When fetching free MSI-X vectors for ULDs, check for the error code before accessing MSI-X info array. Otherwise, an out-of-bounds access is attempted, which results in kernel panic. Fixes: 94cdb8bb ("cxgb4: Add support for dynamic allocation of resources for ULD") Signed-off-by:
Shahjada Abul Husain <shahjada@chelsio.com> Signed-off-by:
Vishal Kulkarni <vishal@chelsio.com> Signed-off-by:
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Daniel Borkmann authored
commit c751798a upstream. syzkaller managed to trigger the warning in bpf_jit_free() which checks via bpf_prog_kallsyms_verify_off() for potentially unlinked JITed BPF progs in kallsyms, and subsequently trips over GPF when walking kallsyms entries: [...] 8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 WARNING: CPU: 0 PID: 9869 at kernel/bpf/core.c:810 bpf_jit_free+0x1e8/0x2a0 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9869 Comm: kworker/0:7 Not tainted 5.0.0-rc8+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events bpf_prog_free_deferred Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x113/0x167 lib/dump_stack.c:113 panic+0x212/0x40b kernel/panic.c:214 __warn.cold.8+0x1b/0x38 kernel/panic.c:571 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:bpf_jit_free+0x1e8/0x2a0 Code: 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 86 00 00 00 48 ba 00 02 00 00 00 00 ad de 0f b6 43 02 49 39 d6 0f 84 5f fe ff ff <0f> 0b e9 58 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 RSP: 0018:ffff888092f67cd8 EFLAGS: 00010202 RAX: 0000000000000007 RBX: ffffc90001947000 RCX: ffffffff816e9d88 RDX: dead000000000200 RSI: 0000000000000008 RDI: ffff88808769f7f0 RBP: ffff888092f67d00 R08: fffffbfff1394059 R09: fffffbfff1394058 R10: fffffbfff1394058 R11: ffffffff89ca02c7 R12: ffffc90001947002 R13: ffffc90001947020 R14: ffffffff881eca80 R15: ffff88808769f7e8 BUG: unable to handle kernel paging request at fffffbfff400d000 #PF error: [normal kernel read fault] PGD 21ffee067 P4D 21ffee067 PUD 21ffed067 PMD 9f942067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9869 Comm: kworker/0:7 Not tainted 5.0.0-rc8+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events bpf_prog_free_deferred RIP: 0010:bpf_get_prog_addr_region kernel/bpf/core.c:495 [inline] RIP: 0010:bpf_tree_comp kernel/bpf/core.c:558 [inline] RIP: 0010:__lt_find include/linux/rbtree_latch.h:115 [inline] RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline] RIP: 0010:bpf_prog_kallsyms_find+0x107/0x2e0 kernel/bpf/core.c:632 Code: 00 f0 ff ff 44 38 c8 7f 08 84 c0 0f 85 fa 00 00 00 41 f6 45 02 01 75 02 0f 0b 48 39 da 0f 82 92 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 45 01 00 00 8b 03 48 c1 e0 [...] Upon further debugging, it turns out that whenever we trigger this issue, the kallsyms removal in bpf_prog_ksym_node_del() was /skipped/ but yet bpf_jit_free() reported that the entry is /in use/. Problem is that symbol exposure via bpf_prog_kallsyms_add() but also perf_event_bpf_event() were done /after/ bpf_prog_new_fd(). Once the fd is exposed to the public, a parallel close request came in right before we attempted to do the bpf_prog_kallsyms_add(). Given at this time the prog reference count is one, we start to rip everything underneath us via bpf_prog_release() -> bpf_prog_put(). The memory is eventually released via deferred free, so we're seeing that bpf_jit_free() has a kallsym entry because we added it from bpf_prog_load() but /after/ bpf_prog_put() from the remote CPU. Therefore, move both notifications /before/ we install the fd. The issue was never seen between bpf_prog_alloc_id() and bpf_prog_new_fd() because upon bpf_prog_get_fd_by_id() we'll take another reference to the BPF prog, so we're still holding the original reference from the bpf_prog_load(). Fixes: 6ee52e2a ("perf, bpf: Introduce PERF_RECORD_BPF_EVENT") Fixes: 74451e66 ("bpf: make jited programs visible in traces") Reported-by: syzbot+bd3bba6ff3fcea7a6ec6@syzkaller.appspotmail.com Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Cc: Song Liu <songliubraving@fb.com> Signed-off-by:
Zubin Mithra <zsm@chromium.org> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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Damien Le Moal authored
[ Upstream commit cb8acabb ] Commit 7211aef8 ("block: mq-deadline: Fix write completion handling") added a call to blk_mq_sched_mark_restart_hctx() in dd_dispatch_request() to make sure that write request dispatching does not stall when all target zones are locked. This fix left a subtle race when a write completion happens during a dispatch execution on another CPU: CPU 0: Dispatch CPU1: write completion dd_dispatch_request() lock(&dd->lock); ... lock(&dd->zone_lock); dd_finish_request() rq = find request lock(&dd->zone_lock); unlock(&dd->zone_lock); zone write unlock unlock(&dd->zone_lock); ... __blk_mq_free_request check restart flag (not set) -> queue not run ... if (!rq && have writes) blk_mq_sched_mark_restart_hctx() unlock(&dd->lock) Since the dispatch context finishes after the write request completion handling, marking the queue as needing a restart is not seen from __blk_mq_free_request() and blk_mq_sched_restart() not executed leading to the dispatch stall under 100% write workloads. Fix this by moving the call to blk_mq_sched_mark_restart_hctx() from dd_dispatch_request() into dd_finish_request() under the zone lock to ensure full mutual exclusion between write request dispatch selection and zone unlock on write request completion. Fixes: 7211aef8 ("block: mq-deadline: Fix write completion handling") Cc: stable@vger.kernel.org Reported-by:
Hans Holmberg <Hans.Holmberg@wdc.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Alexandre Ghiti authored
[ Upstream commit 86e568e9 ] mmap base address must be computed wrt stack top address, using TASK_SIZE is wrong since STACK_TOP and TASK_SIZE are not equivalent. Link: http://lkml.kernel.org/r/20190730055113.23635-8-alex@ghiti.frSigned-off-by:
Alexandre Ghiti <alex@ghiti.fr> Acked-by:
Kees Cook <keescook@chromium.org> Reviewed-by:
Luis Chamberlain <mcgrof@kernel.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Alexandre Ghiti authored
[ Upstream commit af0f4297 ] This commit takes care of stack randomization and stack guard gap when computing mmap base address and checks if the task asked for randomization. This fixes the problem uncovered and not fixed for arm here: https://lkml.kernel.org/r/20170622200033.25714-1-riel@redhat.com Link: http://lkml.kernel.org/r/20190730055113.23635-7-alex@ghiti.frSigned-off-by:
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Alexandre Ghiti authored
[ Upstream commit b1f61b5b ] This commit takes care of stack randomization and stack guard gap when computing mmap base address and checks if the task asked for randomization. This fixes the problem uncovered and not fixed for arm here: https://lkml.kernel.org/r/20170622200033.25714-1-riel@redhat.com Link: http://lkml.kernel.org/r/20190730055113.23635-10-alex@ghiti.frSigned-off-by:
Paul Burton <paul.burton@mips.com> Reviewed-by:
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Alexandre Ghiti authored
[ Upstream commit e8d54b62 ] Do not offset mmap base address because of stack randomization if current task does not want randomization. Note that x86 already implements this behaviour. Link: http://lkml.kernel.org/r/20190730055113.23635-4-alex@ghiti.frSigned-off-by:
Catalin Marinas <catalin.marinas@arm.com> Acked-by:
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Nicolas Boichat authored
[ Upstream commit b751c52b ] The current default value (400) is too low on many systems (e.g. some ARM64 platform takes up 1000+ entries). syzbot uses 16000 as default value, and has proved to be enough on beefy configurations, so let's pick that value. This consumes more RAM on boot (each entry is 160 bytes, so in total ~2.5MB of RAM), but the memory would later be freed (early_log is __initdata). Link: http://lkml.kernel.org/r/20190730154027.101525-1-drinkcat@chromium.orgSigned-off-by:
Nicolas Boichat <drinkcat@chromium.org> Suggested-by:
Dmitry Vyukov <dvyukov@google.com> Acked-by:
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Changwei Ge authored
[ Upstream commit 0a3775e4 ] There is a scenario causing ocfs2 umount hang when multiple hosts are rebooting at the same time. NODE1 NODE2 NODE3 send unlock requset to NODE2 dies become recovery master recover NODE2 find NODE2 dead mark resource RECOVERING directly remove lock from grant list calculate usage but RECOVERING marked **miss the window of purging clear RECOVERING To reproduce this issue, crash a host and then umount ocfs2 from another node. To solve this, just let unlock progress wait for recovery done. Link: http://lkml.kernel.org/r/1550124866-20367-1-git-send-email-gechangwei@live.cnSigned-off-by:
Changwei Ge <gechangwei@live.cn> Reviewed-by:
Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Signed-off-by:
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Greg Thelen authored
[ Upstream commit 6279eb3d ] Since 9e3596b0 ("kbuild: initramfs cleanup, set target from Kconfig") "make clean" leaves behind compressed initramfs images. Example: $ make defconfig $ sed -i 's|CONFIG_INITRAMFS_SOURCE=""|CONFIG_INITRAMFS_SOURCE="/tmp/ir.cpio"|' .config $ make olddefconfig $ make -s $ make -s clean $ git clean -ndxf | grep initramfs Would remove usr/initramfs_data.cpio.gz clean rules do not have CONFIG_* context so they do not know which compression format was used. Thus they don't know which files to delete. Tell clean to delete all possible compression formats. Once patched usr/initramfs_data.cpio.gz and friends are deleted by "make clean". Link: http://lkml.kernel.org/r/20190722063251.55541-1-gthelen@google.com Fixes: 9e3596b0 ("kbuild: initramfs cleanup, set target from Kconfig") Signed-off-by:
Greg Thelen <gthelen@google.com> Cc: Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
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Yunfeng Ye authored
[ Upstream commit 24fbf7ba ] There are two problems in sec_free_hw_sgl(): First, when sgl_current->next is valid, @hw_sgl will be freed in the first loop, but it free again after the loop. Second, sgl_current and sgl_current->next_sgl is not match when dma_pool_free() is invoked, the third parameter should be the dma address of sgl_current, but sgl_current->next_sgl is the dma address of next chain, so use sgl_current->next_sgl is wrong. Fix this by deleting the last dma_pool_free() in sec_free_hw_sgl(), modifying the condition for while loop, and matching the address for dma_pool_free(). Fixes: 915e4e84 ("crypto: hisilicon - SEC security accelerator driver") Signed-off-by:
Yunfeng Ye <yeyunfeng@huawei.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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David Howells authored
[ Upstream commit b54c64f7 ] In hypfs_fill_super(), if hypfs_create_update_file() fails, sbi->update_file is left holding an error number. This is passed to hypfs_kill_super() which doesn't check for this. Fix this by not setting sbi->update_value until after we've checked for error. Fixes: 24bbb1fa ("[PATCH] s390_hypfs filesystem") Signed-off-by:
David Howells <dhowells@redhat.com> cc: Martin Schwidefsky <schwidefsky@de.ibm.com> cc: Heiko Carstens <heiko.carstens@de.ibm.com> cc: linux-s390@vger.kernel.org Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Jens Axboe authored
[ Upstream commit eb09b3cc ] Anatoly reports that he gets the below warning when booting -git on a sparc64 box on debian unstable: ... [ 13.352975] aes_sparc64: Using sparc64 aes opcodes optimized AES implementation [ 13.428002] ------------[ cut here ]------------ [ 13.428081] WARNING: CPU: 21 PID: 586 at drivers/block/pktcdvd.c:2597 pkt_setup_dev+0x2e4/0x5a0 [pktcdvd] [ 13.428147] Attempt to register a non-SCSI queue [ 13.428184] Modules linked in: pktcdvd libdes cdrom aes_sparc64 n2_rng md5_sparc64 sha512_sparc64 rng_core sha256_sparc64 flash sha1_sparc64 ip_tables x_tables ipv6 crc_ccitt nf_defrag_ipv6 autofs4 ext4 crc16 mbcache jbd2 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear md_mod crc32c_sparc64 [ 13.428452] CPU: 21 PID: 586 Comm: pktsetup Not tainted 5.3.0-10169-g574cc453 #1234 [ 13.428507] Call Trace: [ 13.428542] [00000000004635c0] __warn+0xc0/0x100 [ 13.428582] [0000000000463634] warn_slowpath_fmt+0x34/0x60 [ 13.428626] [000000001045b244] pkt_setup_dev+0x2e4/0x5a0 [pktcdvd] [ 13.428674] [000000001045ccf4] pkt_ctl_ioctl+0x94/0x220 [pktcdvd] [ 13.428724] [00000000006b95c8] do_vfs_ioctl+0x628/0x6e0 [ 13.428764] [00000000006b96c8] ksys_ioctl+0x48/0x80 [ 13.428803] [00000000006b9714] sys_ioctl+0x14/0x40 [ 13.428847] [0000000000406294] linux_sparc_syscall+0x34/0x44 [ 13.428890] irq event stamp: 4181 [ 13.428924] hardirqs last enabled at (4189): [<00000000004e0a74>] console_unlock+0x634/0x6c0 [ 13.428984] hardirqs last disabled at (4196): [<00000000004e0540>] console_unlock+0x100/0x6c0 [ 13.429048] softirqs last enabled at (3978): [<0000000000b2e2d8>] __do_softirq+0x498/0x520 [ 13.429110] softirqs last disabled at (3967): [<000000000042cfb4>] do_softirq_own_stack+0x34/0x60 [ 13.429172] ---[ end trace 2220ca468f32967d ]--- [ 13.430018] pktcdvd: setup of pktcdvd device failed [ 13.455589] des_sparc64: Using sparc64 des opcodes optimized DES implementation [ 13.515334] camellia_sparc64: Using sparc64 camellia opcodes optimized CAMELLIA implementation [ 13.522856] pktcdvd: setup of pktcdvd device failed [ 13.529327] pktcdvd: setup of pktcdvd device failed [ 13.532932] pktcdvd: setup of pktcdvd device failed [ 13.536165] pktcdvd: setup of pktcdvd device failed [ 13.539372] pktcdvd: setup of pktcdvd device failed [ 13.542834] pktcdvd: setup of pktcdvd device failed [ 13.546536] pktcdvd: setup of pktcdvd device failed [ 15.431071] XFS (dm-0): Mounting V5 Filesystem ... Apparently debian auto-attaches any cdrom like device to pktcdvd, which can lead to the above warning. There's really no reason to warn for this situation, kill it. Reported-by:
Anatoly Pugachev <matorola@gmail.com> Signed-off-by:
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OGAWA Hirofumi authored
[ Upstream commit 07bfa441 ] If userspace reads the buffer via blockdev while mounting, sb_getblk()+modify can race with buffer read via blockdev. For example, FS userspace bh = sb_getblk() modify bh->b_data read ll_rw_block(bh) fill bh->b_data by on-disk data /* lost modified data by FS */ set_buffer_uptodate(bh) set_buffer_uptodate(bh) Userspace should not use the blockdev while mounting though, the udev seems to be already doing this. Although I think the udev should try to avoid this, workaround the race by small overhead. Link: http://lkml.kernel.org/r/87pnk7l3sw.fsf_-_@mail.parknet.co.jpSigned-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reported-by:
Jan Stancek <jstancek@redhat.com> Tested-by:
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Mike Rapoport authored
[ Upstream commit 00d2ec1e ] The calculation of memblock_limit in adjust_lowmem_bounds() assumes that bank 0 starts from a PMD-aligned address. However, the beginning of the first bank may be NOMAP memory and the start of usable memory will be not aligned to PMD boundary. In such case the memblock_limit will be set to the end of the NOMAP region, which will prevent any memblock allocations. Mark the region between the end of the NOMAP area and the next PMD-aligned address as NOMAP as well, so that the usable memory will start at PMD-aligned address. Signed-off-by:
Mike Rapoport <rppt@linux.ibm.com> Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Jia-Ju Bai authored
[ Upstream commit 3f4287e7 ] In smack_socket_sock_rcv_skb(), there is an if statement on line 3920 to check whether skb is NULL: if (skb && skb->secmark != 0) This check indicates skb can be NULL in some cases. But on lines 3931 and 3932, skb is used: ad.a.u.net->netif = skb->skb_iif; ipv6_skb_to_auditdata(skb, &ad.a, NULL); Thus, possible null-pointer dereferences may occur when skb is NULL. To fix these possible bugs, an if statement is added to check skb. These bugs are found by a static analysis tool STCheck written by us. Signed-off-by:
Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by:
Casey Schaufler <casey@schaufler-ca.com> Signed-off-by:
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Thierry Reding authored
[ Upstream commit ddd69600 ] devm_of_phy_get() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate devres structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "PHY not specified in DT". What we really want is to ignore the optional PHYs only if they have not been specified in DT. devm_of_phy_get() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Signed-off-by:
Thierry Reding <treding@nvidia.com> Signed-off-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by:
Andrew Murray <andrew.murray@arm.com> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by:
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Thierry Reding authored
[ Upstream commit 2170a09f ] regulator_get_optional() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate data structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "regulator not specified in DT". What we really want is to ignore the optional regulators only if they have not been specified in DT. regulator_get_optional() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Signed-off-by:
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Thierry Reding authored
[ Upstream commit 8f9e1641 ] regulator_get_optional() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate data structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "regulator not specified in DT". What we really want is to ignore the optional regulators only if they have not been specified in DT. regulator_get_optional() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Signed-off-by:
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Thierry Reding authored
[ Upstream commit 0e3ff0ac ] regulator_get_optional() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate data structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "regulator not specified in DT". What we really want is to ignore the optional regulators only if they have not been specified in DT. regulator_get_optional() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Tested-by:
Heiko Stuebner <heiko@sntech.de> Signed-off-by:
Shawn Lin <shawn.lin@rock-chips.com> Cc: Shawn Lin <shawn.lin@rock-chips.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: linux-rockchip@lists.infradead.org Signed-off-by:
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Joao Moreno authored
[ Upstream commit aec256d0 ] This fixes an issue in which key down events for function keys would be repeatedly emitted even after the user has raised the physical key. For example, the driver fails to emit the F5 key up event when going through the following steps: - fnmode=1: hold FN, hold F5, release FN, release F5 - fnmode=2: hold F5, hold FN, release F5, release FN The repeated F5 key down events can be easily verified using xev. Signed-off-by:
Joao Moreno <mail@joaomoreno.com> Co-developed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
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Biwen Li authored
[ Upstream commit 7ef66122 ] Issue: - # hwclock -w hwclock: RTC_SET_TIME: Invalid argument Why: - Relative commit: 8b9f9d4d ("regmap: verify if register is writeable before writing operations"), this patch will always check for unwritable registers, it will compare reg with max_register in regmap_writeable. - The pcf85363/pcf85263 has the capability of address wrapping which means if you access an address outside the allowed range (0x00-0x2f) hardware actually wraps the access to a lower address. The rtc-pcf85363 driver will use this feature to configure the time and execute 2 actions in the same i2c write operation (stopping the clock and configure the time). However the driver has also configured the `regmap maxregister` protection mechanism that will block accessing addresses outside valid range (0x00-0x2f). How: - Split of writing regs to two parts, first part writes control registers about stop_enable and resets, second part writes RTC time and date registers. Signed-off-by:
Biwen Li <biwen.li@nxp.com> Link: https://lore.kernel.org/r/20190829021418.4607-1-biwen.li@nxp.comSigned-off-by:
Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by:
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Anson Huang authored
[ Upstream commit 6fd4fe9b ] The RTC IRQ is requested before the struct rtc_device is allocated, this may lead to a NULL pointer dereference in IRQ handler. To fix this issue, allocating the rtc_device struct before requesting the RTC IRQ using devm_rtc_allocate_device, and use rtc_register_device to register the RTC device. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Reviewed-by:
Dong Aisheng <aisheng.dong@nxp.com> Link: https://lore.kernel.org/r/20190716071858.36750-1-Anson.Huang@nxp.comSigned-off-by:
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Nick Desaulniers authored
[ Upstream commit a05b9608 ] Clang produces references to __aeabi_uidivmod and __aeabi_idivmod for arm-linux-gnueabi and arm-linux-gnueabihf targets incorrectly when AEABI is not selected (such as when OABI_COMPAT is selected). While this means that OABI userspaces wont be able to upgraded to kernels built with Clang, it means that boards that don't enable AEABI like s3c2410_defconfig will stop failing to link in KernelCI when built with Clang. Link: https://github.com/ClangBuiltLinux/linux/issues/482 Link: https://groups.google.com/forum/#!msg/clang-built-linux/yydsAAux5hk/GxjqJSW-AQAJSuggested-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Nick Desaulniers <ndesaulniers@google.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Pierre-Louis Bossart authored
[ Upstream commit 18046335 ] On all released Intel controllers (CNL/CML/ICL), PDI2 reports an invalid count, force the correct hardware-supported value This may have to be revisited with platform-specific values if the hardware changes, but for now this is good enough. Signed-off-by:
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20190806005522.22642-3-pierre-louis.bossart@linux.intel.comSigned-off-by:
Vinod Koul <vkoul@kernel.org> Signed-off-by:
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Will Deacon authored
[ Upstream commit 83402036 ] Translation faults arising from cache maintenance instructions are rather unhelpfully reported with an FSR value where the WnR field is set to 1, indicating that the faulting access was a write. Since cache maintenance instructions on 32-bit ARM do not require any particular permissions, this can cause our private 'cacheflush' system call to fail spuriously if a translation fault is generated due to page aging when targetting a read-only VMA. In this situation, we will return -EFAULT to userspace, although this is unfortunately suppressed by the popular '__builtin___clear_cache()' intrinsic provided by GCC, which returns void. Although it's tempting to write this off as a userspace issue, we can actually do a little bit better on CPUs that support LPAE, even if the short-descriptor format is in use. On these CPUs, cache maintenance faults additionally set the CM field in the FSR, which we can use to suppress the write permission checks in the page fault handler and succeed in performing cache maintenance to read-only areas even in the presence of a translation fault. Reported-by:
Orion Hodson <oth@google.com> Signed-off-by:
Will Deacon <will@kernel.org> Signed-off-by:
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Miroslav Benes authored
[ Upstream commit 4ff96fb5 ] klp_module_coming() is called for every module appearing in the system. It sets obj->mod to a patched module for klp_object obj. Unfortunately it leaves it set even if an error happens later in the function and the patched module is not allowed to be loaded. klp_is_object_loaded() uses obj->mod variable and could currently give a wrong return value. The bug is probably harmless as of now. Signed-off-by:
Miroslav Benes <mbenes@suse.cz> Reviewed-by:
Petr Mladek <pmladek@suse.com> Acked-by:
Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by:
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Jason Gerecke authored
[ Upstream commit 073b50bc ] Addresses a few issues that were noticed when compiling with non-default warnings enabled. The trimmed-down warnings in the order they are fixed below are: * declaration of 'size' shadows a parameter * '%s' directive output may be truncated writing up to 5 bytes into a region of size between 1 and 64 * pointer targets in initialization of 'char *' from 'unsigned char *' differ in signedness * left shift of negative value Signed-off-by:
Jason Gerecke <jason.gerecke@wacom.com> Reviewed-by:
Aaron Armstrong Skomra <aaron.skomra@wacom.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Nishka Dasgupta authored
[ Upstream commit 9e38e690 ] Each iteration of for_each_child_of_node() executes of_node_put() on the previous node, but in some return paths in the middle of the loop of_node_put() is missing thus causing a reference leak. Hence stash these mid-loop return values in a variable 'err' and add a new label err_node_put which executes of_node_put() on the previous node and returns 'err' on failure. Change mid-loop return statements to point to jump to this label to fix the reference leak. Issue found with Coccinelle. Signed-off-by:
Nishka Dasgupta <nishkadg.linux@gmail.com> [lorenzo.pieralisi@arm.com: rewrote commit log] Signed-off-by:
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Kai-Heng Feng authored
[ Upstream commit 76380a60 ] Goodix touchpad may drop its first couple input events when i2c-designware-platdrv and intel-lpss it connects to took too long to runtime resume from runtime suspended state. This issue happens becuase the touchpad has a rather small buffer to store up to 13 input events, so if the host doesn't read those events in time (i.e. runtime resume takes too long), events are dropped from the touchpad's buffer. The bottleneck is D3cold delay it waits when transitioning from D3cold to D0, hence remove the delay to make the resume faster. I've tested some systems with intel-lpss and haven't seen any regression. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202683Signed-off-by:
Kai-Heng Feng <kai.heng.feng@canonical.com> Reviewed-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Hans de Goede authored
[ Upstream commit 232219b9 ] When the kernel is build with lockdep support and the i2c-cht-wc driver is used, the following warning is shown: [ 66.674334] ====================================================== [ 66.674337] WARNING: possible circular locking dependency detected [ 66.674340] 5.3.0-rc4+ #83 Not tainted [ 66.674342] ------------------------------------------------------ [ 66.674345] systemd-udevd/1232 is trying to acquire lock: [ 66.674349] 00000000a74dab07 (intel_soc_pmic_chtwc:167:(&cht_wc_regmap_cfg)->lock){+.+.}, at: regmap_write+0x31/0x70 [ 66.674360] but task is already holding lock: [ 66.674362] 00000000d44a85b7 (i2c_register_adapter){+.+.}, at: i2c_smbus_xfer+0x49/0xf0 [ 66.674370] which lock already depends on the new lock. [ 66.674371] the existing dependency chain (in reverse order) is: [ 66.674374] -> #1 (i2c_register_adapter){+.+.}: [ 66.674381] rt_mutex_lock_nested+0x46/0x60 [ 66.674384] i2c_smbus_xfer+0x49/0xf0 [ 66.674387] i2c_smbus_read_byte_data+0x45/0x70 [ 66.674391] cht_wc_byte_reg_read+0x35/0x50 [ 66.674394] _regmap_read+0x63/0x1a0 [ 66.674396] _regmap_update_bits+0xa8/0xe0 [ 66.674399] regmap_update_bits_base+0x63/0xa0 [ 66.674403] regmap_irq_update_bits.isra.0+0x3b/0x50 [ 66.674406] regmap_add_irq_chip+0x592/0x7a0 [ 66.674409] devm_regmap_add_irq_chip+0x89/0xed [ 66.674412] cht_wc_probe+0x102/0x158 [ 66.674415] i2c_device_probe+0x95/0x250 [ 66.674419] really_probe+0xf3/0x380 [ 66.674422] driver_probe_device+0x59/0xd0 [ 66.674425] device_driver_attach+0x53/0x60 [ 66.674428] __driver_attach+0x92/0x150 [ 66.674431] bus_for_each_dev+0x7d/0xc0 [ 66.674434] bus_add_driver+0x14d/0x1f0 [ 66.674437] driver_register+0x6d/0xb0 [ 66.674440] i2c_register_driver+0x45/0x80 [ 66.674445] do_one_initcall+0x60/0x2f4 [ 66.674450] kernel_init_freeable+0x20d/0x2b4 [ 66.674453] kernel_init+0xa/0x10c [ 66.674457] ret_from_fork+0x3a/0x50 [ 66.674459] -> #0 (intel_soc_pmic_chtwc:167:(&cht_wc_regmap_cfg)->lock){+.+.}: [ 66.674465] __lock_acquire+0xe07/0x1930 [ 66.674468] lock_acquire+0x9d/0x1a0 [ 66.674472] __mutex_lock+0xa8/0x9a0 [ 66.674474] regmap_write+0x31/0x70 [ 66.674480] cht_wc_i2c_adap_smbus_xfer+0x72/0x240 [i2c_cht_wc] [ 66.674483] __i2c_smbus_xfer+0x1a3/0x640 [ 66.674486] i2c_smbus_xfer+0x67/0xf0 [ 66.674489] i2c_smbus_read_byte_data+0x45/0x70 [ 66.674494] bq24190_probe+0x26b/0x410 [bq24190_charger] [ 66.674497] i2c_device_probe+0x189/0x250 [ 66.674500] really_probe+0xf3/0x380 [ 66.674503] driver_probe_device+0x59/0xd0 [ 66.674506] device_driver_attach+0x53/0x60 [ 66.674509] __driver_attach+0x92/0x150 [ 66.674512] bus_for_each_dev+0x7d/0xc0 [ 66.674515] bus_add_driver+0x14d/0x1f0 [ 66.674518] driver_register+0x6d/0xb0 [ 66.674521] i2c_register_driver+0x45/0x80 [ 66.674524] do_one_initcall+0x60/0x2f4 [ 66.674528] do_init_module+0x5c/0x230 [ 66.674531] load_module+0x2707/0x2a20 [ 66.674534] __do_sys_init_module+0x188/0x1b0 [ 66.674537] do_syscall_64+0x5c/0xb0 [ 66.674541] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.674543] other info that might help us debug this: [ 66.674545] Possible unsafe locking scenario: [ 66.674547] CPU0 CPU1 [ 66.674548] ---- ---- [ 66.674550] lock(i2c_register_adapter); [ 66.674553] lock(intel_soc_pmic_chtwc:167:(&cht_wc_regmap_cfg)->lock); [ 66.674556] lock(i2c_register_adapter); [ 66.674559] lock(intel_soc_pmic_chtwc:167:(&cht_wc_regmap_cfg)->lock); [ 66.674561] *** DEADLOCK *** The problem is that the CHT Whiskey Cove PMIC's builtin i2c-adapter is itself a part of an i2c-client (the PMIC). This means that transfers done through it take adapter->bus_lock twice, once for the parent i2c-adapter and once for its own bus_lock. Lockdep does not like this nested locking. To make lockdep happy in the case of busses with muxes, the i2c-core's i2c_adapter_lock_bus function calls: rt_mutex_lock_nested(&adapter->bus_lock, i2c_adapter_depth(adapter)); But i2c_adapter_depth only works when the direct parent of the adapter is another adapter, as it is only meant for muxes. In this case there is an i2c-client and MFD instantiated platform_device in the parent->child chain between the 2 devices. This commit overrides the default i2c_lock_operations, passing a hardcoded depth of 1 to rt_mutex_lock_nested, making lockdep happy. Note that if there were to be a mux attached to the i2c-wc-cht adapter, this would break things again since the i2c-mux code expects the root-adapter to have a locking depth of 0. But the i2c-wc-cht adapter always has only 1 client directly attached in the form of the charger IC paired with the CHT Whiskey Cove PMIC. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Nathan Chancellor authored
[ Upstream commit c59ae0a1 ] clang warns: arch/mips/mm/tlbex.c:634:19: error: use of logical '&&' with constant operand [-Werror,-Wconstant-logical-operand] if (cpu_has_rixi && _PAGE_NO_EXEC) { ^ ~~~~~~~~~~~~~ arch/mips/mm/tlbex.c:634:19: note: use '&' for a bitwise operation if (cpu_has_rixi && _PAGE_NO_EXEC) { ^~ & arch/mips/mm/tlbex.c:634:19: note: remove constant to silence this warning if (cpu_has_rixi && _PAGE_NO_EXEC) { ~^~~~~~~~~~~~~~~~ 1 error generated. Explicitly cast this value to a boolean so that clang understands we intend for this to be a non-zero value. Fixes: 00bf1c69 ("MIPS: tlbex: Avoid placing software PTE bits in Entry* PFN fields") Link: https://github.com/ClangBuiltLinux/linux/issues/609Signed-off-by:
Nathan Chancellor <natechancellor@gmail.com> Signed-off-by:
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Zhou Yanjie authored
[ Upstream commit 053951dd ] In order to further reduce power consumption, the XBurst core by default attempts to avoid branch target buffer lookups by detecting & special casing loops. This feature will cause BogoMIPS and lpj calculate in error. Set cp0 config7 bit 4 to disable this feature. Signed-off-by:
Zhou Yanjie <zhouyanjie@zoho.com> Signed-off-by:
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zhangyi (F) authored
[ Upstream commit 7727ae52 ] Remount process will release system zone which was allocated before if "noblock_validity" is specified. If we mount an ext4 file system to two mountpoints with default mount options, and then remount one of them with "noblock_validity", it may trigger a use after free problem when someone accessing the other one. # mount /dev/sda foo # mount /dev/sda bar User access mountpoint "foo" | Remount mountpoint "bar" | ext4_map_blocks() | ext4_remount() check_block_validity() | ext4_setup_system_zone() ext4_data_block_valid() | ext4_release_system_zone() | free system_blks rb nodes access system_blks rb nodes | trigger use after free | This problem can also be reproduced by one mountpint, At the same time, add_system_zone() can get called during remount as well so there can be racing ext4_data_block_valid() reading the rbtree at the same time. This patch add RCU to protect system zone from releasing or building when doing a remount which inverse current "noblock_validity" mount option. It assign the rbtree after the whole tree was complete and do actual freeing after rcu grace period, avoid any intermediate state. Reported-by: syzbot+1e470567330b7ad711d5@syzkaller.appspotmail.com Signed-off-by:
zhangyi (F) <yi.zhang@huawei.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Reviewed-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Chris Wilson authored
[ Upstream commit d3c6dd1f ] During release of the syncpt, we remove it from the list of syncpt and the tree, but only if it is not already been removed. However, during signaling, we first remove the syncpt from the list. So, if we concurrently free and signal the syncpt, the free may decide that it is not part of the tree and immediately free itself -- meanwhile the signaler goes on to use the now freed datastructure. In particular, we get struck by commit 0e2f733a ("dma-buf: make dma_fence structure a bit smaller v2") as the cb_list is immediately clobbered by the kfree_rcu. v2: Avoid calling into timeline_fence_release() from under the spinlock Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111381 Fixes: d3862e44 ("dma-buf/sw-sync: Fix locking around sync_timeline lists") References: 0e2f733a ("dma-buf: make dma_fence structure a bit smaller v2") Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Sean Paul <seanpaul@chromium.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Christian König <christian.koenig@amd.com> Cc: <stable@vger.kernel.org> # v4.14+ Acked-by:
Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190812154247.20508-1-chris@chris-wilson.co.ukSigned-off-by:
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