From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Anand Jain <anand.jain@oracle.com>,
Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.com>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.14 069/100] btrfs: update the bdev time directly when closing
Date: Fri, 24 Sep 2021 14:44:18 +0200 [thread overview]
Message-ID: <20210924124343.749996744@linuxfoundation.org> (raw)
In-Reply-To: <20210924124341.214446495@linuxfoundation.org>
From: Josef Bacik <josef@toxicpanda.com>
[ Upstream commit 8f96a5bfa1503e0a5f3c78d51e993a1794d4aff1 ]
We update the ctime/mtime of a block device when we remove it so that
blkid knows the device changed. However we do this by re-opening the
block device and calling filp_update_time. This is more correct because
it'll call the inode->i_op->update_time if it exists, but the block dev
inodes do not do this. Instead call generic_update_time() on the
bd_inode in order to avoid the blkdev_open path and get rid of the
following lockdep splat:
======================================================
WARNING: possible circular locking dependency detected
5.14.0-rc2+ #406 Not tainted
------------------------------------------------------
losetup/11596 is trying to acquire lock:
ffff939640d2f538 ((wq_completion)loop0){+.+.}-{0:0}, at: flush_workqueue+0x67/0x5e0
but task is already holding lock:
ffff939655510c68 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x41/0x660 [loop]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&lo->lo_mutex){+.+.}-{3:3}:
__mutex_lock+0x7d/0x750
lo_open+0x28/0x60 [loop]
blkdev_get_whole+0x25/0xf0
blkdev_get_by_dev.part.0+0x168/0x3c0
blkdev_open+0xd2/0xe0
do_dentry_open+0x161/0x390
path_openat+0x3cc/0xa20
do_filp_open+0x96/0x120
do_sys_openat2+0x7b/0x130
__x64_sys_openat+0x46/0x70
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
-> #3 (&disk->open_mutex){+.+.}-{3:3}:
__mutex_lock+0x7d/0x750
blkdev_get_by_dev.part.0+0x56/0x3c0
blkdev_open+0xd2/0xe0
do_dentry_open+0x161/0x390
path_openat+0x3cc/0xa20
do_filp_open+0x96/0x120
file_open_name+0xc7/0x170
filp_open+0x2c/0x50
btrfs_scratch_superblocks.part.0+0x10f/0x170
btrfs_rm_device.cold+0xe8/0xed
btrfs_ioctl+0x2a31/0x2e70
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
-> #2 (sb_writers#12){.+.+}-{0:0}:
lo_write_bvec+0xc2/0x240 [loop]
loop_process_work+0x238/0xd00 [loop]
process_one_work+0x26b/0x560
worker_thread+0x55/0x3c0
kthread+0x140/0x160
ret_from_fork+0x1f/0x30
-> #1 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}:
process_one_work+0x245/0x560
worker_thread+0x55/0x3c0
kthread+0x140/0x160
ret_from_fork+0x1f/0x30
-> #0 ((wq_completion)loop0){+.+.}-{0:0}:
__lock_acquire+0x10ea/0x1d90
lock_acquire+0xb5/0x2b0
flush_workqueue+0x91/0x5e0
drain_workqueue+0xa0/0x110
destroy_workqueue+0x36/0x250
__loop_clr_fd+0x9a/0x660 [loop]
block_ioctl+0x3f/0x50
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
other info that might help us debug this:
Chain exists of:
(wq_completion)loop0 --> &disk->open_mutex --> &lo->lo_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&lo->lo_mutex);
lock(&disk->open_mutex);
lock(&lo->lo_mutex);
lock((wq_completion)loop0);
*** DEADLOCK ***
1 lock held by losetup/11596:
#0: ffff939655510c68 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x41/0x660 [loop]
stack backtrace:
CPU: 1 PID: 11596 Comm: losetup Not tainted 5.14.0-rc2+ #406
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
Call Trace:
dump_stack_lvl+0x57/0x72
check_noncircular+0xcf/0xf0
? stack_trace_save+0x3b/0x50
__lock_acquire+0x10ea/0x1d90
lock_acquire+0xb5/0x2b0
? flush_workqueue+0x67/0x5e0
? lockdep_init_map_type+0x47/0x220
flush_workqueue+0x91/0x5e0
? flush_workqueue+0x67/0x5e0
? verify_cpu+0xf0/0x100
drain_workqueue+0xa0/0x110
destroy_workqueue+0x36/0x250
__loop_clr_fd+0x9a/0x660 [loop]
? blkdev_ioctl+0x8d/0x2a0
block_ioctl+0x3f/0x50
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/btrfs/volumes.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 10dd2d210b0f..d4e0c4aa6d4d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1928,15 +1928,17 @@ out:
* Function to update ctime/mtime for a given device path.
* Mainly used for ctime/mtime based probe like libblkid.
*/
-static void update_dev_time(const char *path_name)
+static void update_dev_time(struct block_device *bdev)
{
- struct file *filp;
+ struct inode *inode = bdev->bd_inode;
+ struct timespec64 now;
- filp = filp_open(path_name, O_RDWR, 0);
- if (IS_ERR(filp))
+ /* Shouldn't happen but just in case. */
+ if (!inode)
return;
- file_update_time(filp);
- filp_close(filp, NULL);
+
+ now = current_time(inode);
+ generic_update_time(inode, &now, S_MTIME | S_CTIME);
}
static int btrfs_rm_dev_item(struct btrfs_device *device)
@@ -2116,7 +2118,7 @@ void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
btrfs_kobject_uevent(bdev, KOBJ_CHANGE);
/* Update ctime/mtime for device path for libblkid */
- update_dev_time(device_path);
+ update_dev_time(bdev);
}
int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
@@ -2769,7 +2771,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
btrfs_forget_devices(device_path);
/* Update ctime/mtime for blkid or udev */
- update_dev_time(device_path);
+ update_dev_time(bdev);
return ret;
--
2.33.0
next prev parent reply other threads:[~2021-09-24 13:02 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 12:43 [PATCH 5.14 000/100] 5.14.8-rc1 review Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 001/100] PCI: pci-bridge-emul: Add PCIe Root Capabilities Register Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 002/100] PCI: aardvark: Fix reporting CRS value Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 003/100] console: consume APC, DM, DCS Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 004/100] staging: rtl8192u: Fix bitwise vs logical operator in TranslateRxSignalStuff819xUsb() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 005/100] um: fix stub location calculation Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 006/100] coredump: fix memleak in dump_vma_snapshot() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 007/100] um: virtio_uml: fix memory leak on init failures Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 008/100] RDMA/hns: Enable stash feature of HIP09 Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 009/100] RDMA/mlx5: Fix xlt_chunk_align calculation Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 010/100] dmaengine: acpi: Avoid comparison GSI with Linux vIRQ Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 011/100] perf test: Fix bpf test sample mismatch reporting Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 012/100] perf symbol: Look for ImageBase in PE file to compute .text offset Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 013/100] perf tools: Allow build-id with trailing zeros Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 014/100] staging: rtl8723bs: fix wpa_set_auth_algs() function Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 015/100] n64cart: fix return value check in n64cart_probe() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 016/100] thermal/drivers/exynos: Fix an error code in exynos_tmu_probe() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 017/100] 9p/trans_virtio: Remove sysfs file on probe failure Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 018/100] pwm: ab8500: Fix register offset calculation to not depend on probe order Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 019/100] prctl: allow to setup brk for et_dyn executables Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 020/100] nilfs2: use refcount_dec_and_lock() to fix potential UAF Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 021/100] profiling: fix shift-out-of-bounds bugs Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 022/100] PM: sleep: core: Avoid setting power.must_resume to false Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 023/100] thermal/drivers/qcom/spmi-adc-tm5: Dont abort probing if a sensor is not used Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 024/100] ceph: cancel delayed work instead of flushing on mdsc teardown Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 025/100] pwm: lpc32xx: Dont modify HW state in .probe() after the PWM chip was registered Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 026/100] pwm: mxs: " Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 027/100] dmanegine: idxd: cleanup all device related bits after disabling device Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 028/100] dmaengine: idxd: have command status always set Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 029/100] dmaengine: idxd: fix wq slot allocation index check Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 030/100] dmaengine: idxd: fix abort status check Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 031/100] dmaengine: idxd: clear block on fault flag when clear wq Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 032/100] platform/chrome: sensorhub: Add trace events for sample Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 033/100] platform/chrome: cros_ec_trace: Fix format warnings Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 034/100] s390/entry: make oklabel within CHKSTG macro local Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 035/100] SUNRPC: dont pause on incomplete allocation Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 036/100] math: RATIONAL_KUNIT_TEST should depend on RATIONAL instead of selecting it Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 037/100] init: move usermodehelper_enable() to populate_rootfs() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 038/100] Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 039/100] tools/bootconfig: Fix tracing_on option checking in ftrace2bconf.sh Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 040/100] tracing/boot: Fix to loop on only subkeys Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 041/100] thermal/core: Fix thermal_cooling_device_register() prototype Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 042/100] drm/amdgpu: Disable PCIE_DPM on Intel RKL Platform Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 043/100] drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 044/100] dma-buf: DMABUF_MOVE_NOTIFY should depend on DMA_SHARED_BUFFER Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 045/100] dma-buf: DMABUF_DEBUG " Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 046/100] parisc: Move pci_dev_is_behind_card_dino to where it is used Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 047/100] iommu/amd: Relocate GAMSup check to early_enable_iommus Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 048/100] iommu/vt-d: Fix PASID leak in intel_svm_unbind_mm() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 049/100] iommu/vt-d: Fix a deadlock in intel_svm_drain_prq() Greg Kroah-Hartman
2021-09-24 12:43 ` [PATCH 5.14 050/100] arm64: mm: limit linear region to 51 bits for KVM in nVHE mode Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 051/100] drm/ttm: Fix a deadlock if the target BO is not idle during swap Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 052/100] of: property: Disable fw_devlink DT support for X86 Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 053/100] riscv: dts: microchip: mpfs-icicle: Fix serial console Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 054/100] perf tools: Fix hybrid config terms list corruption Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 055/100] dmaengine: idxd: depends on !UML Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 056/100] dmaengine: sprd: Add missing MODULE_DEVICE_TABLE Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 057/100] cxl: Move cxl_core to new directory Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 058/100] cxl/pci: Introduce cdevm_file_operations Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 059/100] dmaengine: ioat: depends on !UML Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 060/100] dmaengine: xilinx_dma: Set DMA mask for coherent APIs Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 061/100] s390: add kmemleak annotation in stack_alloc() Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 062/100] ASoC: audio-graph: respawn Platform Support Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 063/100] ACPI: PM: s2idle: Run both AMD and Microsoft methods if both are supported Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 064/100] ceph: fix memory leak on decode error in ceph_handle_caps Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 065/100] ceph: request Fw caps before updating the mtime in ceph_write_iter Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 066/100] ceph: remove the capsnaps when removing caps Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 067/100] ceph: lockdep annotations for try_nonblocking_invalidate Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 068/100] s390/unwind: use current_frame_address() to unwind current task Greg Kroah-Hartman
2021-09-24 12:44 ` Greg Kroah-Hartman [this message]
2021-09-24 12:44 ` [PATCH 5.14 070/100] btrfs: delay blkdev_put until after the device remove Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 071/100] btrfs: fix lockdep warning while mounting sprout fs Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 072/100] nilfs2: fix memory leak in nilfs_sysfs_create_device_group Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 073/100] nilfs2: fix NULL pointer in nilfs_##name##_attr_release Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 074/100] nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 075/100] nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 076/100] nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 077/100] nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 078/100] thermal/drivers/rcar_gen3_thermal: Store TSC id as unsigned int Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 079/100] habanalabs: fix nullifying of destroyed mmu pgt pool Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 080/100] habanalabs: fix race between soft reset and heartbeat Greg Kroah-Hartman
2021-09-25 11:53 ` Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 081/100] drm/amdgpu: Fixes to returning VBIOS RAS EEPROM address Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 082/100] drm/amd/display: Fix memory leak reported by coverity Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 083/100] drm/amdgpu: fix fdinfo race with process exit Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 084/100] habanalabs: add validity check for event ID received from F/W Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 085/100] habanalabs: fix mmu node address resolution in debugfs Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 086/100] habanalabs: add "in device creation" status Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 087/100] habanalabs: cannot sleep while holding spinlock Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 088/100] pwm: img: Dont modify HW state in .remove() callback Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 089/100] pwm: rockchip: " Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 090/100] pwm: stm32-lp: " Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 091/100] nvmet: fixup buffer overrun in nvmet_subsys_attr_serial() Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 092/100] block: genhd: dont call blkdev_show() with major_names_lock held Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 093/100] blk-throttle: fix UAF by deleteing timer in blk_throtl_exit() Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 094/100] blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 095/100] rtc: rx8010: select REGMAP_I2C Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 096/100] sched/idle: Make the idle timer expire in hard interrupt context Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 097/100] cifs: properly invalidate cached root handle when closing it Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 098/100] io_uring: fix off-by-one in BUILD_BUG_ON check of __REQ_F_LAST_BIT Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 099/100] selinux,smack: fix subjective/objective credential use mixups Greg Kroah-Hartman
2021-09-24 12:44 ` [PATCH 5.14 100/100] drm/nouveau/nvkm: Replace -ENOSYS with -ENODEV Greg Kroah-Hartman
2021-09-24 14:21 ` [PATCH 5.14 000/100] 5.14.8-rc1 review Daniel Díaz
2021-09-25 11:50 ` Greg Kroah-Hartman
2021-09-24 17:59 ` Jon Hunter
2021-09-24 20:10 ` Fox Chen
2021-09-24 21:52 ` Shuah Khan
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