- 12 Mar, 2018 8 commits
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Hyunchul Lee authored
Add the 'whint_mode' mount option that controls which write hints are passed down to block layer. There are "off" and "user-based" mode. The default mode is "off". 1) whint_mode=off. F2FS only passes down WRITE_LIFE_NOT_SET. 2) whint_mode=user-based. F2FS tries to pass down hints given by users. User F2FS Block ---- ---- ----- META WRITE_LIFE_NOT_SET HOT_NODE " WARM_NODE " COLD_NODE " ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME extension list " " -- buffered io WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET WRITE_LIFE_NONE " " WRITE_LIFE_MEDIUM " " WRITE_LIFE_LONG " " -- direct io WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET WRITE_LIFE_NONE " WRITE_LIFE_NONE WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM WRITE_LIFE_LONG " WRITE_LIFE_LONG Many thanks to Chao Yu and Jaegeuk Kim for comments to implement this patch. Signed-off-by: Hyunchul Lee <cheol.lee@lge.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: avoid build warning] [Chao Yu: fix to restore whint_mode in ->remount_fs] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
Once CP_TRIMMED_FLAG is set, after a reboot, we will never issue discard before LBA becomes invalid again, fix it by clearing the flag in checkpoint without CP_TRIMMED reason. Fixes: 1f43e2ad ("f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard") Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
Previously, we will store all nat version bitmap in checkpoint pack block, so our total node entry number has a limitation which caused total node number can not exceed (3900 * 8) block * 455 node/block = 14196000. So that once user wants to create more nodes in large size image, it becomes a bottleneck, that's unreasonable. This patch detects the new layout of nat/sit version bitmap in image in order to enable supporting large nat bitmap. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
If noextent_cache mount option is on, we will never initialize extent tree in inode, but still we're going to access it in f2fs_drop_extent_tree, result in kernel panic as below: BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 IP: _raw_write_lock+0xc/0x30 Call Trace: ? f2fs_drop_extent_tree+0x41/0x70 [f2fs] f2fs_fallocate+0x5a0/0xdd0 [f2fs] ? common_file_perm+0x47/0xc0 ? apparmor_file_permission+0x1a/0x20 vfs_fallocate+0x15b/0x290 SyS_fallocate+0x44/0x70 do_syscall_64+0x6e/0x160 entry_SYSCALL64_slow_path+0x25/0x25 This patch fixes to check extent cache status before using in f2fs_drop_extent_tree. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
This patch limits to enable inline_xattr_size mount option only if both extra_attr and flexible_inline_xattr feature is on in current image. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Yunlong Song authored
Commit 7a20b8a6 ("f2fs: allocate node and hot data in the beginning of partition") introduces another mount option, heap, to reset it back. But it does not do anything for heap mode, so fix it. Cc: stable@vger.kernel.org Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Sheng Yong authored
sb_getblk does not guarantee the buffer head is uptodate. If bh is not uptodate, the data (may be used as boot code) in area before F2FS_SUPER_OFFSET may get corrupted when super block is committed. Signed-off-by: Sheng Yong <shengyong1@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Yunlong Song authored
Previous dentry page uses highmem, which will cause panic in platforms using highmem (such as arm), since the address space of dentry pages from highmem directly goes into the decryption path via the function fscrypt_fname_disk_to_usr. But sg_init_one assumes the address is not from highmem, and then cause panic since it doesn't call kmap_high but kunmap_high is triggered at the end. To fix this problem in a simple way, this patch avoids to put dentry page in pagecache into highmem. Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: fix coding style] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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- 25 Feb, 2018 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: - Add handling for a missing instruction in our 32-bit BPF JIT so that it can be used for seccomp filtering. - Add a missing NULL pointer check before a function call in new EEH code. - Fix an error path in the new ocxl driver to correctly return EFAULT. - The support for the new ibm,drc-info device tree property turns out to need several fixes, so for now we just stop advertising to firmware that we support it until the bugs can be ironed out. - One fix for the new drmem code which was incorrectly modifying the device tree in place. - Finally two fixes for the RFI flush support, so that firmware can advertise to us that it should be disabled entirely so as not to affect performance. Thanks to: Bharata B Rao, Frederic Barrat, Juan J. Alvarez, Mark Lord, Michael Bringmann. * tag 'powerpc-4.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/powernv: Support firmware disable of RFI flush powerpc/pseries: Support firmware disable of RFI flush powerpc/mm/drmem: Fix unexpected flag value in ibm,dynamic-memory-v2 powerpc/bpf/jit: Fix 32-bit JIT for seccomp_data access powerpc/pseries: Revert support for ibm,drc-info devtree property powerpc/pseries: Fix duplicate firmware feature for DRC_INFO ocxl: Fix potential bad errno on irq allocation powerpc/eeh: Fix crashes in eeh_report_resume()
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- 23 Feb, 2018 24 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix TTL offset calculation in mac80211 mesh code, from Peter Oh. 2) Fix races with procfs in ipt_CLUSTERIP, from Cong Wang. 3) Memory leak fix in lpm_trie BPF map code, from Yonghong Song. 4) Need to use GFP_ATOMIC in BPF cpumap allocations, from Jason Wang. 5) Fix potential deadlocks in netfilter getsockopt() code paths, from Paolo Abeni. 6) Netfilter stackpointer size checks really are needed to validate user input, from Florian Westphal. 7) Missing timer init in x_tables, from Paolo Abeni. 8) Don't use WQ_MEM_RECLAIM in mac80211 hwsim, from Johannes Berg. 9) When an ibmvnic device is brought down then back up again, it can be sent queue entries from a previous session, handle this properly instead of crashing. From Thomas Falcon. 10) Fix TCP checksum on LRO buffers in mlx5e, from Gal Pressman. 11) When we are dumping filters in cls_api, the output SKB is empty, and the filter we are dumping is too large for the space in the SKB, we should return -EMSGSIZE like other netlink dump operations do. Otherwise userland has no signal that is needs to increase the size of its read buffer. From Roman Kapl. 12) Several XDP fixes for virtio_net, from Jesper Dangaard Brouer. 13) Module refcount leak in netlink when a dump start fails, from Jason Donenfeld. 14) Handle sub-optimal GSO sizes better in TCP BBR congestion control, from Eric Dumazet. 15) Releasing bpf per-cpu arraymaps can take a long time, add a condtional scheduling point. From Eric Dumazet. 16) Implement retpolines for tail calls in x64 and arm64 bpf JITs. From Daniel Borkmann. 17) Fix page leak in gianfar driver, from Andy Spencer. 18) Missed clearing of estimator scratch buffer, from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (76 commits) net_sched: gen_estimator: fix broken estimators based on percpu stats gianfar: simplify FCS handling and fix memory leak ipv6 sit: work around bogus gcc-8 -Wrestrict warning macvlan: fix use-after-free in macvlan_common_newlink() bpf, arm64: fix out of bounds access in tail call bpf, x64: implement retpoline for tail call rxrpc: Fix send in rxrpc_send_data_packet() net: aquantia: Fix error handling in aq_pci_probe() bpf: fix rcu lockdep warning for lpm_trie map_free callback bpf: add schedule points in percpu arrays management regulatory: add NUL to request alpha2 ibmvnic: Fix early release of login buffer net/smc9194: Remove bogus CONFIG_MAC reference net: ipv4: Set addr_type in hash_keys for forwarded case tcp_bbr: better deal with suboptimal GSO smsc75xx: fix smsc75xx_set_features() netlink: put module reference if dump start fails selftests/bpf/test_maps: exit child process without error in ENOMEM case selftests/bpf: update gitignore with test_libbpf_open selftests/bpf: tcpbpf_kern: use in6_* macros from glibc ..
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Linus Torvalds authored
Merge branch 'fixes-v4.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem fixes from James Morris: - keys fixes via David Howells: "A collection of fixes for Linux keyrings, mostly thanks to Eric Biggers: - Fix some PKCS#7 verification issues. - Fix handling of unsupported crypto in X.509. - Fix too-large allocation in big_key" - Seccomp updates via Kees Cook: "These are fixes for the get_metadata interface that landed during -rc1. While the new selftest is strictly not a bug fix, I think it's in the same spirit of avoiding bugs" - an IMA build fix from Randy Dunlap * 'fixes-v4.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: integrity/security: fix digsig.c build error with header file KEYS: Use individual pages in big_key for crypto buffers X.509: fix NULL dereference when restricting key with unsupported_sig X.509: fix BUG_ON() when hash algorithm is unsupported PKCS#7: fix direct verification of SignerInfo signature PKCS#7: fix certificate blacklisting PKCS#7: fix certificate chain verification seccomp: add a selftest for get_metadata ptrace, seccomp: tweak get_metadata behavior slightly seccomp, ptrace: switch get_metadata types to arch independent
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull arm64 fixes from Catalin Marinas: "arm64 and perf fixes: - build error when accessing MPIDR_HWID_BITMASK from .S - fix CTR_EL0 field definitions - remove/disable some kernel messages on user faults (unhandled signals, unimplemented syscalls) - fix kernel page fault in unwind_frame() with function graph tracing - fix perf sleeping while atomic errors when booting with ACPI" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: fix unwind_frame() for filtered out fn for function graph tracing arm64: Enforce BBM for huge IO/VMAP mappings arm64: perf: correct PMUVer probing arm_pmu: acpi: request IRQs up-front arm_pmu: note IRQs and PMUs per-cpu arm_pmu: explicitly enable/disable SPIs at hotplug arm_pmu: acpi: check for mismatched PPIs arm_pmu: add armpmu_alloc_atomic() arm_pmu: fold platform helpers into platform code arm_pmu: kill arm_pmu_platdata ARM: ux500: remove PMU IRQ bouncer arm64: __show_regs: Only resolve kernel symbols when running at EL1 arm64: Remove unimplemented syscall log message arm64: Disable unhandled signal log messages by default arm64: cpufeature: Fix CTR_EL0 field definitions arm64: uaccess: Formalise types for access_ok() arm64: Fix compilation error while accessing MPIDR_HWID_BITMASK from .S files
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mipsLinus Torvalds authored
Pull MIPS fix from James Hogan: "A single MIPS fix for mismatching struct compat_flock, resulting in bus errors starting Firefox on Debian 8 since 4.13" * tag 'mips_fixes_4.16_3' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: MIPS: Drop spurious __unused in struct compat_flock
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git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printkLinus Torvalds authored
Pull printk fixlet from Petr Mladek: "People expect to see the real pointer value for %px. Let's substitute '(null)' only for the other %p? format modifiers that need to deference the pointer" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: vsprintf: avoid misleading "(null)" for %px
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fixes from Wolfram Sang: "Two bugfixes, one v4.16 regression fix, and two documentation fixes" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: designware: Consider SCL GPIO optional i2c: busses: i2c-sirf: Fix spelling: "formular" -> "formula". i2c: bcm2835: Set up the rising/falling edge delays i2c: i801: Add missing documentation entries for Braswell and Kaby Lake i2c: designware: must wait for enable
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "These are mostly fixes for problems with merge window code. In addition we have one doc update (alua) and two dead code removals (aiclib and octogon) a spurious assignment removal (csiostor) and a performance improvement for storvsc involving better interrupt spreading and increasing the command per lun handling" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: qla4xxx: skip error recovery in case of register disconnect. scsi: aacraid: fix shutdown crash when init fails scsi: qedi: Cleanup local str variable scsi: qedi: Fix truncation of CHAP name and secret scsi: qla2xxx: Fix incorrect handle for abort IOCB scsi: qla2xxx: Fix double free bug after firmware timeout scsi: storvsc: Increase cmd_per_lun for higher speed devices scsi: qla2xxx: Fix a locking imbalance in qlt_24xx_handle_els() scsi: scsi_dh: Document alua_rtpg_queue() arguments scsi: Remove Makefile entry for oktagon files scsi: aic7xxx: remove aiclib.c scsi: qla2xxx: Avoid triggering undefined behavior in qla2x00_mbx_completion() scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo() scsi: sym53c8xx_2: iterator underflow in sym_getsync() scsi: bnx2fc: Fix check in SCSI completion handler for timed out request scsi: csiostor: remove redundant assignment to pointer 'ln' scsi: ufs: Enable quirk to ignore sending WRITE_SAME command scsi: ibmvfc: fix misdefined reserved field in ibmvfc_fcp_rsp_info scsi: qla2xxx: Fix memory corruption during hba reset test scsi: mpt3sas: fix an out of bound write
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "A bunch of fixes for rc3: Exynos: - fixes for using monotonic timestamps - register definitions - removal of unused file ipu-v3L - minor changes - make some register arrays const+static - fix some leaks meson: - fix for vsync atomic: - fix for memory leak EDID parser: - add quirks for some more non-desktop devices - 6-bit panel fix. drm_mm: - fix a bug in the core drm mm hole handling cirrus: - fix lut loading regression Lastly there is a deadlock fix around runtime suspend for secondary GPUs. There was a deadlock between one thread trying to wait for a workqueue job to finish in the runtime suspend path, and the workqueue job it was waiting for in turn waiting for a runtime_get_sync to return. The fixes avoids it by not doing the runtime sync in the workqueue as then we always wait for all those tasks to complete before we runtime suspend" * tag 'drm-fixes-for-v4.16-rc3' of git://people.freedesktop.org/~airlied/linux: (25 commits) drm/tve200: fix kernel-doc documentation comment include drm/edid: quirk Sony PlayStation VR headset as non-desktop drm/edid: quirk Windows Mixed Reality headsets as non-desktop drm/edid: quirk Oculus Rift headsets as non-desktop drm/meson: fix vsync buffer update drm: Handle unexpected holes in color-eviction drm: exynos: Use proper macro definition for HDMI_I2S_PIN_SEL_1 drm/exynos: remove exynos_drm_rotator.h drm/exynos: g2d: Delete an error message for a failed memory allocation in two functions drm/exynos: fix comparison to bitshift when dealing with a mask drm/exynos: g2d: use monotonic timestamps drm/edid: Add 6 bpc quirk for CPT panel in Asus UX303LA gpu: ipu-csi: add 10/12-bit grayscale support to mbus_code_to_bus_cfg gpu: ipu-cpmem: add 16-bit grayscale support to ipu_cpmem_set_image gpu: ipu-v3: prg: fix device node leak in ipu_prg_lookup_by_phandle gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandle drm/amdgpu: Fix deadlock on runtime suspend drm/radeon: Fix deadlock on runtime suspend drm/nouveau: Fix deadlock on runtime suspend drm: Allow determining if current task is output poll worker ...
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Eric Dumazet authored
pfifo_fast got percpu stats lately, uncovering a bug I introduced last year in linux-4.10. I missed the fact that we have to clear our temporary storage before calling __gnet_stats_copy_basic() in the case of percpu stats. Without this fix, rate estimators (tc qd replace dev xxx root est 1sec 4sec pfifo_fast) are utterly broken. Fixes: 1c0d32fd ("net_sched: gen_estimator: complete rewrite of rate estimators") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller authored
Alexei Starovoitov says: ==================== pull-request: bpf 2018-02-22 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) two urgent fixes for bpf_tail_call logic for x64 and arm64 JITs, from Daniel. 2) cond_resched points in percpu array alloc/free paths, from Eric. 3) lockdep and other minor fixes, from Yonghong, Arnd, Anders, Li. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Andy Spencer authored
Previously, buffer descriptors containing only the frame check sequence (FCS) were skipped and not added to the skb. However, the page reference count was still incremented, leading to a memory leak. Fixing this inside gfar_add_rx_frag() is difficult due to reserved memory handling and page reuse. Instead, move the FCS handling to gfar_process_frame() and trim off the FCS before passing the skb up the networking stack. Signed-off-by: Andy Spencer <aspencer@spacex.com> Signed-off-by: Jim Gruen <jgruen@spacex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Arnd Bergmann authored
gcc-8 has a new warning that detects overlapping input and output arguments in memcpy(). It triggers for sit_init_net() calling ipip6_tunnel_clone_6rd(), which is actually correct: net/ipv6/sit.c: In function 'sit_init_net': net/ipv6/sit.c:192:3: error: 'memcpy' source argument is the same as destination [-Werror=restrict] The problem here is that the logic detecting the memcpy() arguments finds them to be the same, but the conditional that tests for the input and output of ipip6_tunnel_clone_6rd() to be identical is not a compile-time constant. We know that netdev_priv(t->dev) is the same as t for a tunnel device, and comparing "dev" directly here lets the compiler figure out as well that 'dev == sitn->fb_tunnel_dev' when called from sit_init_net(), so it no longer warns. This code is old, so Cc stable to make sure that we don't get the warning for older kernels built with new gcc. Cc: Martin Sebor <msebor@gmail.com> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83456Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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Alexey Kodanev authored
The following use-after-free was reported by KASan when running LTP macvtap01 test on 4.16-rc2: [10642.528443] BUG: KASAN: use-after-free in macvlan_common_newlink+0x12ef/0x14a0 [macvlan] [10642.626607] Read of size 8 at addr ffff880ba49f2100 by task ip/18450 ... [10642.963873] Call Trace: [10642.994352] dump_stack+0x5c/0x7c [10643.035325] print_address_description+0x75/0x290 [10643.092938] kasan_report+0x28d/0x390 [10643.137971] ? macvlan_common_newlink+0x12ef/0x14a0 [macvlan] [10643.207963] macvlan_common_newlink+0x12ef/0x14a0 [macvlan] [10643.275978] macvtap_newlink+0x171/0x260 [macvtap] [10643.334532] rtnl_newlink+0xd4f/0x1300 ... [10646.256176] Allocated by task 18450: [10646.299964] kasan_kmalloc+0xa6/0xd0 [10646.343746] kmem_cache_alloc_trace+0xf1/0x210 [10646.397826] macvlan_common_newlink+0x6de/0x14a0 [macvlan] [10646.464386] macvtap_newlink+0x171/0x260 [macvtap] [10646.522728] rtnl_newlink+0xd4f/0x1300 ... [10647.022028] Freed by task 18450: [10647.061549] __kasan_slab_free+0x138/0x180 [10647.111468] kfree+0x9e/0x1c0 [10647.147869] macvlan_port_destroy+0x3db/0x650 [macvlan] [10647.211411] rollback_registered_many+0x5b9/0xb10 [10647.268715] rollback_registered+0xd9/0x190 [10647.319675] register_netdevice+0x8eb/0xc70 [10647.370635] macvlan_common_newlink+0xe58/0x14a0 [macvlan] [10647.437195] macvtap_newlink+0x171/0x260 [macvtap] Commit d02fd6e7 ("macvlan: Fix one possible double free") handles the case when register_netdevice() invokes ndo_uninit() on error and as a result free the port. But 'macvlan_port_get_rtnl(dev))' check (returns dev->rx_handler_data), which was added by this commit in order to prevent double free, is not quite correct: * for macvlan it always returns NULL because 'lowerdev' is the one that was used to register rx handler (port) in macvlan_port_create() as well as to unregister it in macvlan_port_destroy(). * for macvtap it always returns a valid pointer because macvtap registers its own rx handler before macvlan_common_newlink(). Fixes: d02fd6e7 ("macvlan: Fix one possible double free") Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pratyush Anand authored
do_task_stat() calls get_wchan(), which further does unwind_frame(). unwind_frame() restores frame->pc to original value in case function graph tracer has modified a return address (LR) in a stack frame to hook a function return. However, if function graph tracer has hit a filtered function, then we can't unwind it as ftrace_push_return_trace() has biased the index(frame->graph) with a 'huge negative' offset(-FTRACE_NOTRACE_DEPTH). Moreover, arm64 stack walker defines index(frame->graph) as unsigned int, which can not compare a -ve number. Similar problem we can have with calling of walk_stackframe() from save_stack_trace_tsk() or dump_backtrace(). This patch fixes unwind_frame() to test the index for -ve value and restore index accordingly before we can restore frame->pc. Reproducer: cd /sys/kernel/debug/tracing/ echo schedule > set_graph_notrace echo 1 > options/display-graph echo wakeup > current_tracer ps -ef | grep -i agent Above commands result in: Unable to handle kernel paging request at virtual address ffff801bd3d1e000 pgd = ffff8003cbe97c00 [ffff801bd3d1e000] *pgd=0000000000000000, *pud=0000000000000000 Internal error: Oops: 96000006 [#1] SMP [...] CPU: 5 PID: 11696 Comm: ps Not tainted 4.11.0+ #33 [...] task: ffff8003c21ba000 task.stack: ffff8003cc6c0000 PC is at unwind_frame+0x12c/0x180 LR is at get_wchan+0xd4/0x134 pc : [<ffff00000808892c>] lr : [<ffff0000080860b8>] pstate: 60000145 sp : ffff8003cc6c3ab0 x29: ffff8003cc6c3ab0 x28: 0000000000000001 x27: 0000000000000026 x26: 0000000000000026 x25: 00000000000012d8 x24: 0000000000000000 x23: ffff8003c1c04000 x22: ffff000008c83000 x21: ffff8003c1c00000 x20: 000000000000000f x19: ffff8003c1bc0000 x18: 0000fffffc593690 x17: 0000000000000000 x16: 0000000000000001 x15: 0000b855670e2b60 x14: 0003e97f22cf1d0f x13: 0000000000000001 x12: 0000000000000000 x11: 00000000e8f4883e x10: 0000000154f47ec8 x9 : 0000000070f367c0 x8 : 0000000000000000 x7 : 00008003f7290000 x6 : 0000000000000018 x5 : 0000000000000000 x4 : ffff8003c1c03cb0 x3 : ffff8003c1c03ca0 x2 : 00000017ffe80000 x1 : ffff8003cc6c3af8 x0 : ffff8003d3e9e000 Process ps (pid: 11696, stack limit = 0xffff8003cc6c0000) Stack: (0xffff8003cc6c3ab0 to 0xffff8003cc6c4000) [...] [<ffff00000808892c>] unwind_frame+0x12c/0x180 [<ffff000008305008>] do_task_stat+0x864/0x870 [<ffff000008305c44>] proc_tgid_stat+0x3c/0x48 [<ffff0000082fde0c>] proc_single_show+0x5c/0xb8 [<ffff0000082b27e0>] seq_read+0x160/0x414 [<ffff000008289e6c>] __vfs_read+0x58/0x164 [<ffff00000828b164>] vfs_read+0x88/0x144 [<ffff00000828c2e8>] SyS_read+0x60/0xc0 [<ffff0000080834a0>] __sys_trace_return+0x0/0x4 Fixes: 20380bb3 (arm64: ftrace: fix a stack tracer's output under function graph tracer) Signed-off-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Jerome Marchand <jmarchan@redhat.com> [catalin.marinas@arm.com: replace WARN_ON with WARN_ON_ONCE] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Michael Ellerman authored
Some versions of firmware will have a setting that can be configured to disable the RFI flush, add support for it. Fixes: 6e032b35 ("powerpc/powernv: Check device-tree for RFI flush settings") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Some versions of firmware will have a setting that can be configured to disable the RFI flush, add support for it. Fixes: 8989d568 ("powerpc/pseries: Query hypervisor for RFI flush settings") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Bharata B Rao authored
Memory addtion and removal by count and indexed-count methods temporarily mark the LMBs that are being added/removed by a special flag value DRMEM_LMB_RESERVED. Accessing flags value directly at a few places without proper accessor method is causing two unexpected side-effects: - DRMEM_LMB_RESERVED bit is becoming part of the flags word of drconf_cell_v2 entries in ibm,dynamic-memory-v2 DT property. - This results in extra drconf_cell entries in ibm,dynamic-memory-v2. For example if 1G memory is added, it leads to one entry for 3 LMBs and 1 separate entry for the last LMB. All the 4 LMBs should be defined by one entry here. Fix this by always accessing the flags by its accessor method drmem_lmb_flags(). Fixes: 2b31e3ae ("powerpc/drmem: Add support for ibm, dynamic-memory-v2 property") Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Randy Dunlap authored
security/integrity/digsig.c has build errors on some $ARCH due to a missing header file, so add it. security/integrity/digsig.c:146:2: error: implicit declaration of function 'vfree' [-Werror=implicit-function-declaration] Reported-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Cc: linux-integrity@vger.kernel.org Link: http://kisskb.ellerman.id.au/kisskb/head/13396/Signed-off-by: James Morris <james.morris@microsoft.com>
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James Morris authored
Merge tag 'keys-fixes-20180222-2' of https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into fixes-v4.16-rc3 Keyrings fixes.
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git://git.pengutronix.de/git/pza/linuxDave Airlie authored
drm/imx: ipu-v3 fixups and grayscale support - Make const interrupt register arrays static, reduces object size. - Fix device_node leaks in PRE/PRG phandle lookup functions. - Add 8-bit and 16-bit grayscale buffer support to ipu_cpmem_set_image, - add 10-bit and 12-bit grayscale media bus support to ipu-csi, to be used by the imx-media driver. * tag 'imx-drm-next-2018-02-22' of git://git.pengutronix.de/git/pza/linux: gpu: ipu-csi: add 10/12-bit grayscale support to mbus_code_to_bus_cfg gpu: ipu-cpmem: add 16-bit grayscale support to ipu_cpmem_set_image gpu: ipu-v3: prg: fix device node leak in ipu_prg_lookup_by_phandle gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandle gpu: ipu-cpmem: add 8-bit grayscale support to ipu_cpmem_set_image gpu: ipu-v3: make const arrays int_reg static, shrinks object size
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Kees Cook authored
The MIPS %.its.S compiler command did not define __ASSEMBLY__, which meant when compiler_types.h was added to kconfig.h, unexpected things appeared (e.g. struct declarations) which should not have been present. As done in the general %.S compiler command, __ASSEMBLY__ is now included here too. The failure was: Error: arch/mips/boot/vmlinux.gz.its:201.1-2 syntax error FATAL ERROR: Unable to parse input tree /usr/bin/mkimage: Can't read arch/mips/boot/vmlinux.gz.itb.tmp: Invalid argument /usr/bin/mkimage Can't add hashes to FIT blob Reported-by: kbuild test robot <lkp@intel.com> Fixes: 28128c61 ("kconfig.h: Include compiler types to avoid missed struct attributes") Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull siginfo fix from Eric Biederman: "This fixes a build error that only shows up on blackfin" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: fs/signalfd: fix build error for BUS_MCEERR_AR
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fix from Herbert Xu: "Fix an oops in the s5p-sss driver when used with ecb(aes)" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: s5p-sss - Fix kernel Oops in AES-ECB mode
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Daniel Borkmann authored
I recently noticed a crash on arm64 when feeding a bogus index into BPF tail call helper. The crash would not occur when the interpreter is used, but only in case of JIT. Output looks as follows: [ 347.007486] Unable to handle kernel paging request at virtual address fffb850e96492510 [...] [ 347.043065] [fffb850e96492510] address between user and kernel address ranges [ 347.050205] Internal error: Oops: 96000004 [#1] SMP [...] [ 347.190829] x13: 0000000000000000 x12: 0000000000000000 [ 347.196128] x11: fffc047ebe782800 x10: ffff808fd7d0fd10 [ 347.201427] x9 : 0000000000000000 x8 : 0000000000000000 [ 347.206726] x7 : 0000000000000000 x6 : 001c991738000000 [ 347.212025] x5 : 0000000000000018 x4 : 000000000000ba5a [ 347.217325] x3 : 00000000000329c4 x2 : ffff808fd7cf0500 [ 347.222625] x1 : ffff808fd7d0fc00 x0 : ffff808fd7cf0500 [ 347.227926] Process test_verifier (pid: 4548, stack limit = 0x000000007467fa61) [ 347.235221] Call trace: [ 347.237656] 0xffff000002f3a4fc [ 347.240784] bpf_test_run+0x78/0xf8 [ 347.244260] bpf_prog_test_run_skb+0x148/0x230 [ 347.248694] SyS_bpf+0x77c/0x1110 [ 347.251999] el0_svc_naked+0x30/0x34 [ 347.255564] Code: 9100075a d280220a 8b0a002a d37df04b (f86b694b) [...] In this case the index used in BPF r3 is the same as in r1 at the time of the call, meaning we fed a pointer as index; here, it had the value 0xffff808fd7cf0500 which sits in x2. While I found tail calls to be working in general (also for hitting the error cases), I noticed the following in the code emission: # bpftool p d j i 988 [...] 38: ldr w10, [x1,x10] 3c: cmp w2, w10 40: b.ge 0x000000000000007c <-- signed cmp 44: mov x10, #0x20 // #32 48: cmp x26, x10 4c: b.gt 0x000000000000007c 50: add x26, x26, #0x1 54: mov x10, #0x110 // #272 58: add x10, x1, x10 5c: lsl x11, x2, #3 60: ldr x11, [x10,x11] <-- faulting insn (f86b694b) 64: cbz x11, 0x000000000000007c [...] Meaning, the tests passed because commit ddb55992 ("arm64: bpf: implement bpf_tail_call() helper") was using signed compares instead of unsigned which as a result had the test wrongly passing. Change this but also the tail call count test both into unsigned and cap the index as u32. Latter we did as well in 90caccdd ("bpf: fix bpf_tail_call() x64 JIT") and is needed in addition here, too. Tested on HiSilicon Hi1616. Result after patch: # bpftool p d j i 268 [...] 38: ldr w10, [x1,x10] 3c: add w2, w2, #0x0 40: cmp w2, w10 44: b.cs 0x0000000000000080 48: mov x10, #0x20 // #32 4c: cmp x26, x10 50: b.hi 0x0000000000000080 54: add x26, x26, #0x1 58: mov x10, #0x110 // #272 5c: add x10, x1, x10 60: lsl x11, x2, #3 64: ldr x11, [x10,x11] 68: cbz x11, 0x0000000000000080 [...] Fixes: ddb55992 ("arm64: bpf: implement bpf_tail_call() helper") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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- 22 Feb, 2018 7 commits
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Daniel Borkmann authored
Implement a retpoline [0] for the BPF tail call JIT'ing that converts the indirect jump via jmp %rax that is used to make the long jump into another JITed BPF image. Since this is subject to speculative execution, we need to control the transient instruction sequence here as well when CONFIG_RETPOLINE is set, and direct it into a pause + lfence loop. The latter aligns also with what gcc / clang emits (e.g. [1]). JIT dump after patch: # bpftool p d x i 1 0: (18) r2 = map[id:1] 2: (b7) r3 = 0 3: (85) call bpf_tail_call#12 4: (b7) r0 = 2 5: (95) exit With CONFIG_RETPOLINE: # bpftool p d j i 1 [...] 33: cmp %edx,0x24(%rsi) 36: jbe 0x0000000000000072 |* 38: mov 0x24(%rbp),%eax 3e: cmp $0x20,%eax 41: ja 0x0000000000000072 | 43: add $0x1,%eax 46: mov %eax,0x24(%rbp) 4c: mov 0x90(%rsi,%rdx,8),%rax 54: test %rax,%rax 57: je 0x0000000000000072 | 59: mov 0x28(%rax),%rax 5d: add $0x25,%rax 61: callq 0x000000000000006d |+ 66: pause | 68: lfence | 6b: jmp 0x0000000000000066 | 6d: mov %rax,(%rsp) | 71: retq | 72: mov $0x2,%eax [...] * relative fall-through jumps in error case + retpoline for indirect jump Without CONFIG_RETPOLINE: # bpftool p d j i 1 [...] 33: cmp %edx,0x24(%rsi) 36: jbe 0x0000000000000063 |* 38: mov 0x24(%rbp),%eax 3e: cmp $0x20,%eax 41: ja 0x0000000000000063 | 43: add $0x1,%eax 46: mov %eax,0x24(%rbp) 4c: mov 0x90(%rsi,%rdx,8),%rax 54: test %rax,%rax 57: je 0x0000000000000063 | 59: mov 0x28(%rax),%rax 5d: add $0x25,%rax 61: jmpq *%rax |- 63: mov $0x2,%eax [...] * relative fall-through jumps in error case - plain indirect jump as before [0] https://support.google.com/faqs/answer/7625886 [1] https://github.com/gcc-mirror/gcc/commit/a31e654fa107be968b802786d747e962c2fcdb2bSigned-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Randy Dunlap authored
Fix build error in fs/signalfd.c by using same method that is used in kernel/signal.c: separate blocks for different signal si_code values. ./fs/signalfd.c: error: 'BUS_MCEERR_AR' undeclared (first use in this function) Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
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David Howells authored
All the kernel_sendmsg() calls in rxrpc_send_data_packet() need to send both parts of the iov[] buffer, but one of them does not. Fix it so that it does. Without this, short IPv6 rxrpc DATA packets may be seen that have the rxrpc header included, but no payload. Fixes: 5a924b89 ("rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs") Reported-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Dan Carpenter authored
We should check "self->aq_hw" for allocation failure, and also we should free it on the error paths. Fixes: 23ee07ad ("net: aquantia: Cleanup pci functions module") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Yonghong Song authored
Commit 9a3efb6b ("bpf: fix memory leak in lpm_trie map_free callback function") fixed a memory leak and removed unnecessary locks in map_free callback function. Unfortrunately, it introduced a lockdep warning. When lockdep checking is turned on, running tools/testing/selftests/bpf/test_lpm_map will have: [ 98.294321] ============================= [ 98.294807] WARNING: suspicious RCU usage [ 98.295359] 4.16.0-rc2+ #193 Not tainted [ 98.295907] ----------------------------- [ 98.296486] /home/yhs/work/bpf/kernel/bpf/lpm_trie.c:572 suspicious rcu_dereference_check() usage! [ 98.297657] [ 98.297657] other info that might help us debug this: [ 98.297657] [ 98.298663] [ 98.298663] rcu_scheduler_active = 2, debug_locks = 1 [ 98.299536] 2 locks held by kworker/2:1/54: [ 98.300152] #0: ((wq_completion)"events"){+.+.}, at: [<00000000196bc1f0>] process_one_work+0x157/0x5c0 [ 98.301381] #1: ((work_completion)(&map->work)){+.+.}, at: [<00000000196bc1f0>] process_one_work+0x157/0x5c0 Since actual trie tree removal happens only after no other accesses to the tree are possible, replacing rcu_dereference_protected(*slot, lockdep_is_held(&trie->lock)) with rcu_dereference_protected(*slot, 1) fixed the issue. Fixes: 9a3efb6b ("bpf: fix memory leak in lpm_trie map_free callback function") Reported-by: Eric Dumazet <edumazet@google.com> Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Yonghong Song <yhs@fb.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Eric Dumazet authored
syszbot managed to trigger RCU detected stalls in bpf_array_free_percpu() It takes time to allocate a huge percpu map, but even more time to free it. Since we run in process context, use cond_resched() to yield cpu if needed. Fixes: a10423b8 ("bpf: introduce BPF_MAP_TYPE_PERCPU_ARRAY map") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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David S. Miller authored
Merge tag 'mac80211-for-davem-2018-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Various fixes across the tree, the shortlog basically says it all: cfg80211: fix cfg80211_beacon_dup -> old bug in this code cfg80211: clear wep keys after disconnection -> certain ways of disconnecting left the keys mac80211: round IEEE80211_TX_STATUS_HEADROOM up to multiple of 4 -> alignment issues with using 14 bytes mac80211: Do not disconnect on invalid operating class -> if the AP has a bogus operating class, let it be mac80211: Fix sending ADDBA response for an ongoing session -> don't send the same frame twice cfg80211: use only 1Mbps for basic rates in mesh -> interop issue with old versions of our code mac80211_hwsim: don't use WQ_MEM_RECLAIM -> it causes splats because it flushes work on a non-reclaim WQ regulatory: add NUL to request alpha2 -> nla_put_string() issue from Kees mac80211: mesh: fix wrong mesh TTL offset calculation -> protocol issue mac80211: fix a possible leak of station stats -> error path might leak memory mac80211: fix calling sleeping function in atomic context -> percpu allocations need to be made with gfp flags ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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