From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pavel Begunkov <asml.silence@gmail.com>,
Jens Axboe <axboe@kernel.dk>, Sasha Levin <sashal@kernel.org>,
io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH AUTOSEL 5.8 07/64] io_uring: fix req->work corruption
Date: Mon, 10 Aug 2020 15:08:02 -0400 [thread overview]
Message-ID: <20200810190859.3793319-7-sashal@kernel.org> (raw)
In-Reply-To: <20200810190859.3793319-1-sashal@kernel.org>
From: Pavel Begunkov <asml.silence@gmail.com>
[ Upstream commit 8ef77766ba8694968ed4ba24311b4bacee14f235 ]
req->work and req->task_work are in a union, so io_req_task_queue() screws
everything that was in work. De-union them for now.
[ 704.367253] BUG: unable to handle page fault for address:
ffffffffaf7330d0
[ 704.367256] #PF: supervisor write access in kernel mode
[ 704.367256] #PF: error_code(0x0003) - permissions violation
[ 704.367261] CPU: 6 PID: 1654 Comm: io_wqe_worker-0 Tainted: G
I 5.8.0-rc2-00038-ge28d0bdc4863-dirty #498
[ 704.367265] RIP: 0010:_raw_spin_lock+0x1e/0x36
...
[ 704.367276] __alloc_fd+0x35/0x150
[ 704.367279] __get_unused_fd_flags+0x25/0x30
[ 704.367280] io_openat2+0xcb/0x1b0
[ 704.367283] io_issue_sqe+0x36a/0x1320
[ 704.367294] io_wq_submit_work+0x58/0x160
[ 704.367295] io_worker_handle_work+0x2a3/0x430
[ 704.367296] io_wqe_worker+0x2a0/0x350
[ 704.367301] kthread+0x136/0x180
[ 704.367304] ret_from_fork+0x22/0x30
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 493e5047e67c9..acd98df1f7d44 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -669,12 +669,12 @@ struct io_kiocb {
* restore the work, if needed.
*/
struct {
- struct callback_head task_work;
struct hlist_node hash_node;
struct async_poll *apoll;
};
struct io_wq_work work;
};
+ struct callback_head task_work;
};
#define IO_PLUG_THRESHOLD 2
--
2.25.1
next prev parent reply other threads:[~2020-08-10 19:33 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 19:07 [PATCH AUTOSEL 5.8 01/64] drm/tilcdc: fix leak & null ref in panel_connector_get_modes Sasha Levin
2020-08-10 19:07 ` [PATCH AUTOSEL 5.8 02/64] soc: qcom: rpmh-rsc: Set suppress_bind_attrs flag Sasha Levin
2020-08-10 19:07 ` [PATCH AUTOSEL 5.8 03/64] net: mscc: ocelot: fix encoding destination ports into multicast IPv4 address Sasha Levin
2020-08-10 19:07 ` [PATCH AUTOSEL 5.8 04/64] ARM: exynos: clear L310_AUX_CTRL_FULL_LINE_ZERO in default l2c_aux_val Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 05/64] Bluetooth: add a mutex lock to avoid UAF in do_enale_set Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 06/64] loop: be paranoid on exit and prevent new additions / removals Sasha Levin
2020-08-10 19:08 ` Sasha Levin [this message]
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 08/64] fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 09/64] drm/amdgpu: avoid dereferencing a NULL pointer Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 10/64] drm/radeon: Fix reference count leaks caused by pm_runtime_get_sync Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 11/64] crypto: aesni - Fix build with LLVM_IAS=1 Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 12/64] video: fbdev: savage: fix memory leak on error handling path in probe Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 13/64] video: fbdev: neofb: fix memory leak in neo_scan_monitor() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 14/64] bus: ti-sysc: Add missing quirk flags for usb_host_hs Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 15/64] md-cluster: fix wild pointer of unlock_all_bitmaps() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 16/64] rtw88: 8822ce: add support for device ID 0xc82f Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 17/64] drm/nouveau/kms/nv50-: Fix disabling dithering Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 18/64] arm64: dts: hisilicon: hikey: fixes to comply with adi, adv7533 DT binding Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 19/64] drm/etnaviv: fix ref count leak via pm_runtime_get_sync Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 20/64] ionic: rearrange reset and bus-master control Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 21/64] memory: samsung: exynos5422-dmc: Do not ignore return code of regmap_read() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 22/64] drm/nouveau: fix reference count leak in nouveau_debugfs_strap_peek Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 23/64] drm/nouveau: fix multiple instances of reference count leaks Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 24/64] mmc: sdhci-cadence: do not use hardware tuning for SD mode Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 25/64] btrfs: fix lockdep splat from btrfs_dump_space_info Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 26/64] usb: mtu3: clear dual mode of u3port when disable device Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 27/64] drm: msm: a6xx: fix gpu failure after system resume Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 28/64] drm/msm: Fix a null pointer access in msm_gem_shrinker_count() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 29/64] drm/debugfs: fix plain echo to connector "force" attribute Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 30/64] drm/radeon: disable AGP by default Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 31/64] net: phy: mscc: restore the base page in vsc8514/8584_config_init Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 32/64] irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 33/64] mm/mmap.c: Add cond_resched() for exit_mmap() CPU stalls Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 34/64] drm/amd/display: Improve DisplayPort monitor interop Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 35/64] drm/amdgpu/debugfs: fix ref count leak when pm_runtime_get_sync fails Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 36/64] drm/amdgpu/display bail early in dm_pp_get_static_clocks Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 37/64] drm/amdgpu/display: properly guard the calls to swSMU functions Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 38/64] drm/amd/display: allow query ddc data over aux to be read only operation Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 39/64] drm/amd/powerplay: fix compile error with ARCH=arc Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 40/64] bpf: Fix fds_example SIGSEGV error Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 41/64] Bluetooth: hci_qca: Bug fixes for SSR Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 42/64] brcmfmac: keep SDIO watchdog running when console_interval is non-zero Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 43/64] brcmfmac: To fix Bss Info flag definition Bug Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 44/64] brcmfmac: set state of hanger slot to FREE when flushing PSQ Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 45/64] platform/x86: asus-nb-wmi: add support for ASUS ROG Zephyrus G14 and G15 Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 46/64] iwlegacy: Check the return value of pcie_capability_read_*() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 47/64] gpu: host1x: debug: Fix multiple channels emitting messages simultaneously Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 48/64] drm/amd/powerplay: suppress compile error around BUG_ON Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 49/64] ionic: update eid test for overflow Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 50/64] x86/uaccess: Make __get_user_size() Clang compliant on 32-bit Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 51/64] mmc: sdhci-pci-o2micro: Bug fix for O2 host controller Seabird1 Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 52/64] usb: gadget: net2280: fix memory leak on probe error handling paths Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 53/64] bdc: Fix bug causing crash after multiple disconnects Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 54/64] usb: bdc: Halt controller on suspend Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 55/64] dyndbg: fix a BUG_ON in ddebug_describe_flags Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 56/64] dyndbg: prefer declarative init in caller, to memset in callee Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 57/64] bcache: fix super block seq numbers comparision in register_cache_set() Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 58/64] btrfs: allow btrfs_truncate_block() to fallback to nocow for data space reservation Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 59/64] btrfs: qgroup: free per-trans reserved space when a subvolume gets dropped Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 60/64] ACPICA: Do not increment operation_region reference counts for field units Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 61/64] io_uring: fix racy overflow count reporting Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 62/64] io_uring: fix stalled deferred requests Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 63/64] crypto: caam - silence .setkey in case of bad key length Sasha Levin
2020-08-10 19:08 ` [PATCH AUTOSEL 5.8 64/64] drm/msm: ratelimit crtc event overflow error Sasha Levin
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