- 15 Nov, 2015 4 commits
-
-
Johannes Berg authored
[ Upstream commit 3fd0d3c1 ] Identify 7265-D devices using the hardware revision (they have the same PCI IDs as 7265) and change the configuration for them taking the differences (currently only the firmware image) into account. Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
-
Johannes Berg authored
[ Upstream commit b5a48134 ] The MODULE_FIRMWARE() for 3160 should be using the 7260 version as it's done in the device configuration struct instead of referencing IWL3160_UCODE_API_OK which doesn't even exist. Cc: <stable@vger.kernel.org> [3.8+] Reported-by:
Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by:
Luca Coelho <luciano.coelho@intel.com> Signed-off-by:
-
Johannes Berg authored
[ Upstream commit 5bd16687 ] The code to send the RX PN data (for each TID) to the firmware has a devastating bug: it overwrites the data for TID 0 with all the TID data, leaving the remaining TIDs zeroed. This will allow replays to actually be accepted by the firmware, which could allow waking up the system. Cc: <stable@vger.kernel.org> [3.1+] Signed-off-by:
-
Felix Fietkau authored
[ Upstream commit 029cd037 ] ath9k inserts padding between the 802.11 header and the data area (to align it). Since it didn't declare this extra required headroom, this led to some nasty issues like randomly dropped packets in some setups. Cc: stable@vger.kernel.org Signed-off-by:
Felix Fietkau <nbd@openwrt.org> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
-
- 13 Nov, 2015 23 commits
-
-
Rasmus Villemoes authored
[ Upstream commit 886d3dfa ] The comment helpfully explains why hardirq.h is included, but since commit 2d4b8473 ("hardirq: Split preempt count mask definitions") in_interrupt() has been provided by preempt_mask.h. Use that instead, saving around 40 lines in the generated dependency file. Signed-off-by:
Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
-
Ilya Dryomov authored
[ Upstream commit 3ebe138a ] If rbd_dev_image_probe() in rbd_dev_probe_parent() fails, header_name is freed twice: once in rbd_dev_probe_parent() and then in its caller rbd_dev_image_probe() (rbd_dev_image_probe() is called recursively to handle parent images). rbd_dev_probe_parent() is responsible for probing the parent, so it shouldn't muck with clone's fields. Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Reviewed-by:
Alex Elder <elder@linaro.org> Signed-off-by:
-
Mike Snitzer authored
[ Upstream commit ba30670f ] Fixes: ac8c3f3d ("dm thin: generate event when metadata threshold passed") Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by:
-
Alex Deucher authored
[ Upstream commit 51a4726b ] They were added relatively early in the driver init process which meant that in some cases the driver was not finished initializing before external tools tried to use them which could result in a crash depending on the timing. Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by:
-
Ben Skeggs authored
[ Upstream commit f231976c ] We need to do this in order to prevent accesses to the device while it's powered down. Userspace may have an mmap of the fb, and there's no good way (that I know of) to prevent it from touching the device otherwise. This fixes some nasty races between runpm and plymouth on some systems, which result in the GPU getting very upset and hanging the boot. Signed-off-by:
Ben Skeggs <bskeggs@redhat.com> Cc: stable@vger.kernel.org Signed-off-by:
-
Shaohua Li authored
[ Upstream commit 874bbfe6 ] My system keeps crashing with below message. vmstat_update() schedules a delayed work in current cpu and expects the work runs in the cpu. schedule_delayed_work() is expected to make delayed work run in local cpu. The problem is timer can be migrated with NO_HZ. __queue_work() queues work in timer handler, which could run in a different cpu other than where the delayed work is scheduled. The end result is the delayed work runs in different cpu. The patch makes __queue_delayed_work records local cpu earlier. Where the timer runs doesn't change where the work runs with the change. [ 28.010131] ------------[ cut here ]------------ [ 28.010609] kernel BUG at ../mm/vmstat.c:1392! [ 28.011099] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN [ 28.011860] Modules linked in: [ 28.012245] CPU: 0 PID: 289 Comm: kworker/0:3 Tainted: G W4.3.0-rc3+ #634 [ 28.013065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140709_153802- 04/01/2014 [ 28.014160] Workqueue: events vmstat_update [ 28.014571] task: ffff880117682580 ti: ffff8800ba428000 task.ti: ffff8800ba428000 [ 28.015445] RIP: 0010:[<ffffffff8115f921>] [<ffffffff8115f921>]vmstat_update+0x31/0x80 [ 28.016282] RSP: 0018:ffff8800ba42fd80 EFLAGS: 00010297 [ 28.016812] RAX: 0000000000000000 RBX: ffff88011a858dc0 RCX:0000000000000000 [ 28.017585] RDX: ffff880117682580 RSI: ffffffff81f14d8c RDI:ffffffff81f4df8d [ 28.018366] RBP: ffff8800ba42fd90 R08: 0000000000000001 R09:0000000000000000 [ 28.019169] R10: 0000000000000000 R11: 0000000000000121 R12:ffff8800baa9f640 [ 28.019947] R13: ffff88011a81e340 R14: ffff88011a823700 R15:0000000000000000 [ 28.020071] FS: 0000000000000000(0000) GS:ffff88011a800000(0000)knlGS:0000000000000000 [ 28.020071] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 28.020071] CR2: 00007ff6144b01d0 CR3: 00000000b8e93000 CR4:00000000000006f0 [ 28.020071] Stack: [ 28.020071] ffff88011a858dc0 ffff8800baa9f640 ffff8800ba42fe00ffffffff8106bd88 [ 28.020071] ffffffff8106bd0b 0000000000000096 0000000000000000ffffffff82f9b1e8 [ 28.020071] ffffffff829f0b10 0000000000000000 ffffffff81f18460ffff88011a81e340 [ 28.020071] Call Trace: [ 28.020071] [<ffffffff8106bd88>] process_one_work+0x1c8/0x540 [ 28.020071] [<ffffffff8106bd0b>] ? process_one_work+0x14b/0x540 [ 28.020071] [<ffffffff8106c214>] worker_thread+0x114/0x460 [ 28.020071] [<ffffffff8106c100>] ? process_one_work+0x540/0x540 [ 28.020071] [<ffffffff81071bf8>] kthread+0xf8/0x110 [ 28.020071] [<ffffffff81071b00>] ?kthread_create_on_node+0x200/0x200 [ 28.020071] [<ffffffff81a6522f>] ret_from_fork+0x3f/0x70 [ 28.020071] [<ffffffff81071b00>] ?kthread_create_on_node+0x200/0x200 Signed-off-by:
Shaohua Li <shli@fb.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org # v2.6.31+ Signed-off-by:
-
Mika Westerberg authored
[ Upstream commit 56d4b8a2 ] ACPI SSCN/FMCN methods were originally added because then the platform can provide the most accurate HCNT/LCNT values to the driver. However, this seems not to be true for Dell Inspiron 7348 where using these causes the touchpad to fail in boot: i2c_hid i2c-DLL0675:00: failed to retrieve report from device. i2c_designware INT3433:00: i2c_dw_handle_tx_abort: lost arbitration i2c_hid i2c-DLL0675:00: failed to retrieve report from device. i2c_designware INT3433:00: controller timed out The values received from ACPI are (in fast mode): HCNT: 72 LCNT: 160 this translates to following timings (input clock is 100MHz on Broadwell): tHIGH: 720 ns (spec min 600 ns) tLOW: 1600 ns (spec min 1300 ns) Bus period: 2920 ns (assuming 300 ns tf and tr) Bus speed: 342.5 kHz Both tHIGH and tLOW are within the I2C specification. The calculated values when ACPI parameters are not used are (in fast mode): HCNT: 87 LCNT: 159 which translates to: tHIGH: 870 ns (spec min 600 ns) tLOW: 1590 ns (spec min 1300 ns) Bus period 3060 ns (assuming 300 ns tf and tr) Bus speed 326.8 kHz These values are also within the I2C specification. Since both ACPI and calculated values meet the I2C specification timing requirements it is hard to say why the touchpad does not function properly with the ACPI values except that the bus speed is higher in this case (but still well below the max 400kHz). Solve this by adding DMI quirk to the driver that disables using ACPI parameters on this particulare machine. Reported-by:
Pavel Roskin <plroskin@gmail.com> Signed-off-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by:
Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org Signed-off-by:
-
Wolfram Sang authored
[ Upstream commit eadd709f ] The core may register clients attached to this master which may use funtionality from the master. So, RuntimePM must be enabled before, otherwise this will fail. While here, move drvdata, too. Signed-off-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by:
Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by:
Kukjin Kim <kgene@kernel.org> Signed-off-by:
-
Wolfram Sang authored
[ Upstream commit 4f7effdd ] The core may register clients attached to this master which may use funtionality from the master. So, RuntimePM must be enabled before, otherwise this will fail. While here, move drvdata, too. Reported-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
-
Will Deacon authored
[ Upstream commit b6dd8e07 ] Commit df057cc7 ("arm64: errata: add module build workaround for erratum #843419") sets CFLAGS_MODULE to ensure that the large memory model is used by the compiler when building kernel modules. However, CFLAGS_MODULE is an environment variable and intended to be overridden on the command line, which appears to be the case with the Ubuntu kernel packaging system, so use KBUILD_CFLAGS_MODULE instead. Cc: <stable@vger.kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: df057cc7 ("arm64: errata: add module build workaround for erratum #843419") Reported-by:
Dann Frazier <dann.frazier@canonical.com> Tested-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
-
Chris Mason authored
[ Upstream commit dc6c5fb3 ] The code for btrfs inode-resolve has never worked properly for files with enough hard links to trigger extrefs. It was trying to get the leaf out of a path after freeing the path: btrfs_release_path(path); leaf = path->nodes[0]; item_size = btrfs_item_size_nr(leaf, slot); The fix here is to use the extent buffer we cloned just a little higher up to avoid deadlocks caused by using the leaf in the path. Signed-off-by:
Chris Mason <clm@fb.com> cc: stable@vger.kernel.org # v3.7+ cc: Mark Fasheh <mfasheh@suse.de> Reviewed-by:
Filipe Manana <fdmanana@suse.com> Reviewed-by:
Mark Fasheh <mfasheh@suse.de> Signed-off-by:
-
Russell King authored
[ Upstream commit 8996eafd ] Unlike shash algorithms, ahash drivers must implement export and import as their descriptors may contain hardware state and cannot be exported as is. Unfortunately some ahash drivers did not provide them and end up causing crashes with algif_hash. This patch adds a check to prevent these drivers from registering ahash algorithms until they are fixed. Cc: stable@vger.kernel.org Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
-
Dave Kleikamp authored
[ Upstream commit a66d7f72 ] Some of the crypto algorithms write to the initialization vector, but no space has been allocated for it. This clobbers adjacent memory. Cc: stable@vger.kernel.org Signed-off-by:
Dave Kleikamp <dave.kleikamp@oracle.com> Signed-off-by:
-
Joe Perches authored
[ Upstream commit 077cb37f ] It seems that kernel memory can leak into userspace by a kmalloc, ethtool_get_strings, then copy_to_user sequence. Avoid this by using kcalloc to zero fill the copied buffer. Signed-off-by:
Joe Perches <joe@perches.com> Acked-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
-
Guillaume Nault authored
[ Upstream commit e6740165 ] Since commit 2b018d57 ("pppoe: drop PPPOX_ZOMBIEs in pppoe_release"), pppoe_release() calls dev_put(po->pppoe_dev) if sk is in the PPPOX_ZOMBIE state. But pppoe_flush_dev() can set sk->sk_state to PPPOX_ZOMBIE _and_ reset po->pppoe_dev to NULL. This leads to the following oops: [ 570.140800] BUG: unable to handle kernel NULL pointer dereference at 00000000000004e0 [ 570.142931] IP: [<ffffffffa018c701>] pppoe_release+0x50/0x101 [pppoe] [ 570.144601] PGD 3d119067 PUD 3dbc1067 PMD 0 [ 570.144601] Oops: 0000 [#1] SMP [ 570.144601] Modules linked in: l2tp_ppp l2tp_netlink l2tp_core ip6_udp_tunnel udp_tunnel pppoe pppox ppp_generic slhc loop crc32c_intel ghash_clmulni_intel jitterentropy_rng sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 ablk_helper cryptd lrw gf128mul glue_helper acpi_cpufreq evdev serio_raw processor button ext4 crc16 mbcache jbd2 virtio_net virtio_blk virtio_pci virtio_ring virtio [ 570.144601] CPU: 1 PID: 15738 Comm: ppp-apitest Not tainted 4.2.0 #1 [ 570.144601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 570.144601] task: ffff88003d30d600 ti: ffff880036b60000 task.ti: ffff880036b60000 [ 570.144601] RIP: 0010:[<ffffffffa018c701>] [<ffffffffa018c701>] pppoe_release+0x50/0x101 [pppoe] [ 570.144601] RSP: 0018:ffff880036b63e08 EFLAGS: 00010202 [ 570.144601] RAX: 0000000000000000 RBX: ffff880034340000 RCX: 0000000000000206 [ 570.144601] RDX: 0000000000000006 RSI: ffff88003d30dd20 RDI: ffff88003d30dd20 [ 570.144601] RBP: ffff880036b63e28 R08: 0000000000000001 R09: 0000000000000000 [ 570.144601] R10: 00007ffee9b50420 R11: ffff880034340078 R12: ffff8800387ec780 [ 570.144601] R13: ffff8800387ec7b0 R14: ffff88003e222aa0 R15: ffff8800387ec7b0 [ 570.144601] FS: 00007f5672f48700(0000) GS:ffff88003fc80000(0000) knlGS:0000000000000000 [ 570.144601] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 570.144601] CR2: 00000000000004e0 CR3: 0000000037f7e000 CR4: 00000000000406a0 [ 570.144601] Stack: [ 570.144601] ffffffffa018f240 ffff8800387ec780 ffffffffa018f240 ffff8800387ec7b0 [ 570.144601] ffff880036b63e48 ffffffff812caabe ffff880039e4e000 0000000000000008 [ 570.144601] ffff880036b63e58 ffffffff812cabad ffff880036b63ea8 ffffffff811347f5 [ 570.144601] Call Trace: [ 570.144601] [<ffffffff812caabe>] sock_release+0x1a/0x75 [ 570.144601] [<ffffffff812cabad>] sock_close+0xd/0x11 [ 570.144601] [<ffffffff811347f5>] __fput+0xff/0x1a5 [ 570.144601] [<ffffffff811348cb>] ____fput+0x9/0xb [ 570.144601] [<ffffffff81056682>] task_work_run+0x66/0x90 [ 570.144601] [<ffffffff8100189e>] prepare_exit_to_usermode+0x8c/0xa7 [ 570.144601] [<ffffffff81001a26>] syscall_return_slowpath+0x16d/0x19b [ 570.144601] [<ffffffff813babb1>] int_ret_from_sys_call+0x25/0x9f [ 570.144601] Code: 48 8b 83 c8 01 00 00 a8 01 74 12 48 89 df e8 8b 27 14 e1 b8 f7 ff ff ff e9 b7 00 00 00 8a 43 12 a8 0b 74 1c 48 8b 83 a8 04 00 00 <48> 8b 80 e0 04 00 00 65 ff 08 48 c7 83 a8 04 00 00 00 00 00 00 [ 570.144601] RIP [<ffffffffa018c701>] pppoe_release+0x50/0x101 [pppoe] [ 570.144601] RSP <ffff880036b63e08> [ 570.144601] CR2: 00000000000004e0 [ 570.200518] ---[ end trace 46956baf17349563 ]--- pppoe_flush_dev() has no reason to override sk->sk_state with PPPOX_ZOMBIE. pppox_unbind_sock() already sets sk->sk_state to PPPOX_DEAD, which is the correct state given that sk is unbound and po->pppoe_dev is NULL. Fixes: 2b018d57 ("pppoe: drop PPPOX_ZOMBIEs in pppoe_release") Tested-by:
Oleksii Berezhniak <core@irc.lg.ua> Signed-off-by:
Guillaume Nault <g.nault@alphalink.fr> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit c7c49b8f ] Greg reported crashes hitting the following check in __sk_backlog_rcv() BUG_ON(!sock_flag(sk, SOCK_MEMALLOC)); The pfmemalloc bit is currently checked in sk_filter(). This works correctly for TCP, because sk_filter() is ran in tcp_v[46]_rcv() before hitting the prequeue or backlog checks. For UDP or other protocols, this does not work, because the sk_filter() is ran from sock_queue_rcv_skb(), which might be called _after_ backlog queuing if socket is owned by user by the time packet is processed by softirq handler. Fixes: b4b9e355 ("netvm: set PF_MEMALLOC as appropriate during SKB processing") Signed-off-by:
Eric Dumazet <edumazet@google.com> Reported-by:
Greg Thelen <gthelen@google.com> Signed-off-by:
-
Pravin B Shelar authored
[ Upstream commit 31b33dfb ] Earlier patch 6ae459bd tried to detect void ckecksum partial skb by comparing pull length to checksum offset. But it does not work for all cases since checksum-offset depends on updates to skb->data. Following patch fixes it by validating checksum start offset after skb-data pointer is updated. Negative value of checksum offset start means there is no need to checksum. Fixes: 6ae459bd ("skbuff: Fix skb checksum flag on skb pull") Reported-by:
Andrew Vagin <avagin@odin.com> Signed-off-by:
Pravin B Shelar <pshelar@nicira.com> Signed-off-by:
-
Pravin B Shelar authored
[ Upstream commit 6ae459bd ] VXLAN device can receive skb with checksum partial. But the checksum offset could be in outer header which is pulled on receive. This results in negative checksum offset for the skb. Such skb can cause the assert failure in skb_checksum_help(). Following patch fixes the bug by setting checksum-none while pulling outer header. Following is the kernel panic msg from old kernel hitting the bug. ------------[ cut here ]------------ kernel BUG at net/core/dev.c:1906! RIP: 0010:[<ffffffff81518034>] skb_checksum_help+0x144/0x150 Call Trace: <IRQ> [<ffffffffa0164c28>] queue_userspace_packet+0x408/0x470 [openvswitch] [<ffffffffa016614d>] ovs_dp_upcall+0x5d/0x60 [openvswitch] [<ffffffffa0166236>] ovs_dp_process_packet_with_key+0xe6/0x100 [openvswitch] [<ffffffffa016629b>] ovs_dp_process_received_packet+0x4b/0x80 [openvswitch] [<ffffffffa016c51a>] ovs_vport_receive+0x2a/0x30 [openvswitch] [<ffffffffa0171383>] vxlan_rcv+0x53/0x60 [openvswitch] [<ffffffffa01734cb>] vxlan_udp_encap_recv+0x8b/0xf0 [openvswitch] [<ffffffff8157addc>] udp_queue_rcv_skb+0x2dc/0x3b0 [<ffffffff8157b56f>] __udp4_lib_rcv+0x1cf/0x6c0 [<ffffffff8157ba7a>] udp_rcv+0x1a/0x20 [<ffffffff8154fdbd>] ip_local_deliver_finish+0xdd/0x280 [<ffffffff81550128>] ip_local_deliver+0x88/0x90 [<ffffffff8154fa7d>] ip_rcv_finish+0x10d/0x370 [<ffffffff81550365>] ip_rcv+0x235/0x300 [<ffffffff8151ba1d>] __netif_receive_skb+0x55d/0x620 [<ffffffff8151c360>] netif_receive_skb+0x80/0x90 [<ffffffff81459935>] virtnet_poll+0x555/0x6f0 [<ffffffff8151cd04>] net_rx_action+0x134/0x290 [<ffffffff810683d8>] __do_softirq+0xa8/0x210 [<ffffffff8162fe6c>] call_softirq+0x1c/0x30 [<ffffffff810161a5>] do_softirq+0x65/0xa0 [<ffffffff810687be>] irq_exit+0x8e/0xb0 [<ffffffff81630733>] do_IRQ+0x63/0xe0 [<ffffffff81625f2e>] common_interrupt+0x6e/0x6e Reported-by:
Anupam Chanda <achanda@vmware.com> Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
-
Andrey Vagin authored
[ Upstream commit e9193d60 ] Now send with MSG_PEEK can return data from multiple SKBs. Unfortunately we take into account the peek offset for each skb, that is wrong. We need to apply the peek offset only once. In addition, the peek offset should be used only if MSG_PEEK is set. Cc: "David S. Miller" <davem@davemloft.net> (maintainer:NETWORKING Cc: Eric Dumazet <edumazet@google.com> (commit_signer:1/14=7%) Cc: Aaron Conole <aconole@bytheb.org> Fixes: 9f389e35 ("af_unix: return data from multiple SKBs on recv() with MSG_PEEK flag") Signed-off-by:
Andrey Vagin <avagin@openvz.org> Tested-by:
Aaron Conole <aconole@bytheb.org> Signed-off-by:
-
Aaron Conole authored
[ Upstream commit 9f389e35 ] AF_UNIX sockets now return multiple skbs from recv() when MSG_PEEK flag is set. This is referenced in kernel bugzilla #12323 @ https://bugzilla.kernel.org/show_bug.cgi?id=12323 As described both in the BZ and lkml thread @ http://lkml.org/lkml/2008/1/8/444 calling recv() with MSG_PEEK on an AF_UNIX socket only reads a single skb, where the desired effect is to return as much skb data has been queued, until hitting the recv buffer size (whichever comes first). The modified MSG_PEEK path will now move to the next skb in the tree and jump to the again: label, rather than following the natural loop structure. This requires duplicating some of the loop head actions. This was tested using the python socketpair python code attached to the bugzilla issue. Signed-off-by:
-
Aaron Conole authored
[ Upstream commit 4613012d ] As suggested by Eric Dumazet this change replaces the #define with a static inline function to enjoy complaints by the compiler when misusing the API. Signed-off-by:
-
Alexander Couzens authored
[ Upstream commit 06a15f51 ] There is a small chance that tunnel_free() is called before tunnel->del_work scheduled resulting in a zero pointer dereference. Signed-off-by:
Alexander Couzens <lynxis@fe80.eu> Acked-by:
James Chapman <jchapman@katalix.com> Signed-off-by:
-
Jan Kara authored
[ Upstream commit 841df7df ] Commit 6f6a6fda "jbd2: fix ocfs2 corrupt when updating journal superblock fails" changed jbd2_cleanup_journal_tail() to return EIO when the journal is aborted. That makes logic in jbd2_log_do_checkpoint() bail out which is fine, except that jbd2_journal_destroy() expects jbd2_log_do_checkpoint() to always make a progress in cleaning the journal. Without it jbd2_journal_destroy() just loops in an infinite loop. Fix jbd2_journal_destroy() to cleanup journal checkpoint lists of jbd2_log_do_checkpoint() fails with error. Reported-by:
Eryu Guan <guaneryu@gmail.com> Tested-by:
Jan Kara <jack@suse.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
-
- 31 Oct, 2015 3 commits
-
-
Sasha Levin authored
Signed-off-by: -
Kosuke Tatsukawa authored
[ Upstream commit e81107d4 ] My colleague ran into a program stall on a x86_64 server, where n_tty_read() was waiting for data even if there was data in the buffer in the pty. kernel stack for the stuck process looks like below. #0 [ffff88303d107b58] __schedule at ffffffff815c4b20 #1 [ffff88303d107bd0] schedule at ffffffff815c513e #2 [ffff88303d107bf0] schedule_timeout at ffffffff815c7818 #3 [ffff88303d107ca0] wait_woken at ffffffff81096bd2 #4 [ffff88303d107ce0] n_tty_read at ffffffff8136fa23 #5 [ffff88303d107dd0] tty_read at ffffffff81368013 #6 [ffff88303d107e20] __vfs_read at ffffffff811a3704 #7 [ffff88303d107ec0] vfs_read at ffffffff811a3a57 #8 [ffff88303d107f00] sys_read at ffffffff811a4306 #9 [ffff88303d107f50] entry_SYSCALL_64_fastpath at ffffffff815c86d7 There seems to be two problems causing this issue. First, in drivers/tty/n_tty.c, __receive_buf() stores the data and updates ldata->commit_head using smp_store_release() and then checks the wait queue using waitqueue_active(). However, since there is no memory barrier, __receive_buf() could return without calling wake_up_interactive_poll(), and at the same time, n_tty_read() could start to wait in wait_woken() as in the following chart. __receive_buf() n_tty_read() ------------------------------------------------------------------------ if (waitqueue_active(&tty->read_wait)) /* Memory operations issued after the RELEASE may be completed before the RELEASE operation has completed */ add_wait_queue(&tty->read_wait, &wait); ... if (!input_available_p(tty, 0)) { smp_store_release(&ldata->commit_head, ldata->read_head); ... timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout); ------------------------------------------------------------------------ The second problem is that n_tty_read() also lacks a memory barrier call and could also cause __receive_buf() to return without calling wake_up_interactive_poll(), and n_tty_read() to wait in wait_woken() as in the chart below. __receive_buf() n_tty_read() ------------------------------------------------------------------------ spin_lock_irqsave(&q->lock, flags); /* from add_wait_queue() */ ... if (!input_available_p(tty, 0)) { /* Memory operations issued after the RELEASE may be completed before the RELEASE operation has completed */ smp_store_release(&ldata->commit_head, ldata->read_head); if (waitqueue_active(&tty->read_wait)) __add_wait_queue(q, wait); spin_unlock_irqrestore(&q->lock,flags); /* from add_wait_queue() */ ... timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout); ------------------------------------------------------------------------ There are also other places in drivers/tty/n_tty.c which have similar calls to waitqueue_active(), so instead of adding many memory barrier calls, this patch simply removes the call to waitqueue_active(), leaving just wake_up*() behind. This fixes both problems because, even though the memory access before or after the spinlocks in both wake_up*() and add_wait_queue() can sneak into the critical section, it cannot go past it and the critical section assures that they will be serialized (please see "INTER-CPU ACQUIRING BARRIER EFFECTS" in Documentation/memory-barriers.txt for a better explanation). Moreover, the resulting code is much simpler. Latency measurement using a ping-pong test over a pty doesn't show any visible performance drop. Signed-off-by:
Kosuke Tatsukawa <tatsu@ab.jp.nec.com> Cc: stable@vger.kernel.org Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
-
Sasha Levin authored
This reverts commit af32cc7b. The commit was incorrectly backported and was causing hangs. Reported-by:
Corey Wright <undefined@pobox.com> Signed-off-by:
-
- 29 Oct, 2015 1 commit
-
-
Sasha Levin authored
Signed-off-by:
-
- 28 Oct, 2015 9 commits
-
-
Steven Rostedt authored
[ Upstream commit 5b2bdbc8 ] Commit: 1e02ce4c ("x86: Store a per-cpu shadow copy of CR4") added a shadow CR4 such that reads and writes that do not modify the CR4 execute much faster than always reading the register itself. The change modified cpu_init() in common.c, so that the shadow CR4 gets initialized before anything uses it. Unfortunately, there's two cpu_init()s in common.c. There's one for 64-bit and one for 32-bit. The commit only added the shadow init to the 64-bit path, but the 32-bit path needs the init too. Link: http://lkml.kernel.org/r/20150227125208.71c36402@gandalf.local.home Fixes: 1e02ce4c "x86: Store a per-cpu shadow copy of CR4" Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Acked-by:
Andy Lutomirski <luto@amacapital.net> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20150227145019.2bdd4354@gandalf.local.homeSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
-
Christoph Hellwig authored
[ Upstream commit 15e3d5a2 ] 3w controller don't dma map small single SGL entry commands but instead bounce buffer them. Add a helper to identify these commands and don't call scsi_dma_unmap for them. Based on an earlier patch from James Bottomley. Fixes: 118c85 ("3w-9xxx: fix command completion race") Reported-by:
Tóth Attila <atoth@atoth.sote.hu> Tested-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Adam Radford <aradford@gmail.com> Signed-off-by:
James Bottomley <JBottomley@Odin.com> Signed-off-by:
-
Roland Dreier authored
[ Upstream commit 8ea4b343 ] Backports of 41fc0143 ("fib_rules: fix fib rule dumps across multiple skbs") introduced a regression in "ip rule show" - it ends up dumping the first rule over and over and never exiting, because 3.19 and earlier are missing commit 053c095a ("netlink: make nlmsg_end() and genlmsg_end() void"), so fib_nl_fill_rule() ends up returning skb->len (i.e. > 0) in the success case. Fix this by checking the return code for < 0 instead of != 0. Signed-off-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
-
Eric W. Biederman authored
[ Upstream commit 397d425d ] In rare cases a directory can be renamed out from under a bind mount. In those cases without special handling it becomes possible to walk up the directory tree to the root dentry of the filesystem and down from the root dentry to every other file or directory on the filesystem. Like division by zero .. from an unconnected path can not be given a useful semantic as there is no predicting at which path component the code will realize it is unconnected. We certainly can not match the current behavior as the current behavior is a security hole. Therefore when encounting .. when following an unconnected path return -ENOENT. - Add a function path_connected to verify path->dentry is reachable from path->mnt.mnt_root. AKA to validate that rename did not do something nasty to the bind mount. To avoid races path_connected must be called after following a path component to it's next path component. Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
-
NeilBrown authored
[ Upstream commit ee5d004f ] The 'event_work' worker used by dm-raid may still be running when the array is stopped. This can result in an oops. So flush the workqueue on which it is run after detaching and before destroying the device. Reported-by:
Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by:
NeilBrown <neilb@suse.com> Cc: stable@vger.kernel.org (2.6.38+ please delay 2 weeks after -final release) Fixes: 9d09e663 ("dm: raid456 basic support") Signed-off-by:
-
Andy Lutomirski authored
[ Upstream commit 83c133cf ] The NMI entry code that switches to the normal kernel stack needs to be very careful not to clobber any extra stack slots on the NMI stack. The code is fine under the assumption that SWAPGS is just a normal instruction, but that assumption isn't really true. Use SWAPGS_UNSAFE_STACK instead. This is part of a fix for some random crashes that Sasha saw. Fixes: 9b6e6a83 ("x86/nmi/64: Switch stacks on userspace NMI entry") Reported-and-tested-by:
Andy Lutomirski <luto@kernel.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/974bc40edffdb5c2950a5c4977f821a446b76178.1442791737.git.luto@kernel.orgSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
-
Markus Pargmann authored
[ Upstream commit HEAD ] This reverts commit 279c039c which was commit 06d2f6ca upstream as it should not have been applied. Reported-by:
Luis Henriques <luis.henriques@canonical.com> Cc: Markus Pargmann <mpa@pengutronix.de> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: Jonathan Cameron <jic23@kernel.org> Signed-off-by:
-
Herbert Xu authored
[ Upstream commit a0a2a660 ] The commit 738ac1eb ("net: Clone skb before setting peeked flag") introduced a use-after-free bug in skb_recv_datagram. This is because skb_set_peeked may create a new skb and free the existing one. As it stands the caller will continue to use the old freed skb. This patch fixes it by making skb_set_peeked return the new skb (or the old one if unchanged). Fixes: 738ac1eb ("net: Clone skb before setting peeked flag") Reported-by:
Brenden Blanco <bblanco@plumgrid.com> Signed-off-by:
Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by:
-
Yinghai Lu authored
[ Upstream commit 04697858 ] Tony Luck found on his setup, if memory block size 512M will cause crash during booting. BUG: unable to handle kernel paging request at ffffea0074000020 IP: get_nid_for_pfn+0x17/0x40 PGD 128ffcb067 PUD 128ffc9067 PMD 0 Oops: 0000 [#1] SMP Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-rc8 #1 ... Call Trace: ? register_mem_sect_under_node+0x66/0xe0 register_one_node+0x17b/0x240 ? pci_iommu_alloc+0x6e/0x6e topology_init+0x3c/0x95 do_one_initcall+0xcd/0x1f0 The system has non continuous RAM address: BIOS-e820: [mem 0x0000001300000000-0x0000001cffffffff] usable BIOS-e820: [mem 0x0000001d70000000-0x0000001ec7ffefff] usable BIOS-e820: [mem 0x0000001f00000000-0x0000002bffffffff] usable BIOS-e820: [mem 0x0000002c18000000-0x0000002d6fffefff] usable BIOS-e820: [mem 0x0000002e00000000-0x00000039ffffffff] usable So there are start sections in memory block not present. For example: memory block : [0x2c18000000, 0x2c20000000) 512M first three sections are not present. The current register_mem_sect_under_node() assume first section is present, but memory block section number range [start_section_nr, end_section_nr] would include not present section. For arch that support vmemmap, we don't setup memmap for struct page area within not present sections area. So skip the pfn range that belong to absent section. [akpm@linux-foundation.org: simplification] [rientjes@google.com: more simplification] Fixes: bdee237c ("x86: mm: Use 2GB memory block size on large memory x86-64 systems") Fixes: 982792c7 ("x86, mm: probe memory block size for generic x86 64bit") Signed-off-by:
Yinghai Lu <yinghai@kernel.org> Signed-off-by:
David Rientjes <rientjes@google.com> Reported-by:
Tony Luck <tony.luck@intel.com> Tested-by:
-
