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INFO: task hung in vfs_setxattr (4)

Status: auto-obsoleted due to no activity on 2023/10/02 09:30
Subsystems: ext4
[Documentation on labels]
First crash: 440d, last: 440d
▶ ▼ Similar bugs (12)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in vfs_setxattr (2) fs 1 1571d 1571d 0/28 auto-closed as invalid on 2020/07/28 17:13
linux-5.15 INFO: task hung in vfs_setxattr (2) syz error 1 376d 376d 0/3 auto-obsoleted due to no activity on 2023/12/15 17:11
upstream INFO: task hung in vfs_setxattr (5) fs 1 92d 92d 0/28 auto-obsoleted due to no activity on 2024/09/15 03:42
android-49 INFO: task hung in vfs_setxattr 4 2228d 2254d 0/3 auto-closed as invalid on 2019/02/22 13:09
linux-5.15 INFO: task hung in vfs_setxattr (3) 1 141d 141d 0/3 auto-obsoleted due to no activity on 2024/08/06 16:46
upstream INFO: task hung in vfs_setxattr (3) fs syz done error 49 1044d 1463d 0/28 closed as invalid on 2022/02/08 10:51
upstream INFO: task hung in vfs_setxattr fs 46 2101d 2261d 0/28 auto-closed as invalid on 2019/06/15 01:37
linux-4.19 INFO: task hung in vfs_setxattr (2) C error 3 1074d 1354d 0/1 upstream: reported C repro on 2021/01/01 10:53
android-414 INFO: task hung in vfs_setxattr 1 1977d 1977d 0/1 auto-closed as invalid on 2019/10/16 16:43
linux-5.15 INFO: task hung in vfs_setxattr 1 527d 527d 0/3 auto-obsoleted due to no activity on 2023/08/06 19:50
linux-4.19 INFO: task hung in vfs_setxattr 3 1773d 1835d 0/1 auto-closed as invalid on 2020/03/08 20:30
android-44 INFO: task hung in vfs_setxattr C 3 1852d 1857d 0/2 public: reported C repro on 2019/08/17 15:36

Sample crash report:
INFO: task syz-executor.5:11668 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:0     pid:11668 ppid:6034   flags:0x00000001
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x1368/0x23b8 kernel/sched/core.c:6669
 schedule+0xc4/0x170 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6804
 rwsem_down_write_slowpath+0xcfc/0x1aa0 kernel/locking/rwsem.c:1178
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0xb4/0xc0 kernel/locking/rwsem.c:1574
 inode_lock include/linux/fs.h:775 [inline]
 vfs_setxattr+0x17c/0x344 fs/xattr.c:321
 do_setxattr fs/xattr.c:630 [inline]
 setxattr+0x208/0x29c fs/xattr.c:653
 path_setxattr+0x17c/0x258 fs/xattr.c:672
 __do_sys_setxattr fs/xattr.c:688 [inline]
 __se_sys_setxattr fs/xattr.c:684 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:684
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
INFO: task syz-executor.5:11677 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:0     pid:11677 ppid:6034   flags:0x00000009
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x1368/0x23b8 kernel/sched/core.c:6669
 schedule+0xc4/0x170 kernel/sched/core.c:6745
 __wait_on_freeing_inode fs/inode.c:2196 [inline]
 find_inode_fast+0x2cc/0x3d4 fs/inode.c:950
 iget_locked+0xd0/0x708 fs/inode.c:1273
 __ext4_iget+0x1f4/0x31b4 fs/ext4/inode.c:4696
 ext4_xattr_inode_cache_find fs/ext4/xattr.c:1542 [inline]
 ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1577 [inline]
 ext4_xattr_set_entry+0x167c/0x2d7c fs/ext4/xattr.c:1719
 ext4_xattr_block_set+0x8dc/0x2c64 fs/ext4/xattr.c:2025
 ext4_xattr_set_handle+0xb2c/0x12d8 fs/ext4/xattr.c:2442
 ext4_xattr_set+0x1e0/0x354 fs/ext4/xattr.c:2544
 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:201
 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:235
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:296
 vfs_setxattr+0x1a8/0x344 fs/xattr.c:322
 do_setxattr fs/xattr.c:630 [inline]
 setxattr+0x208/0x29c fs/xattr.c:653
 path_setxattr+0x17c/0x258 fs/xattr.c:672
 __do_sys_setxattr fs/xattr.c:688 [inline]
 __se_sys_setxattr fs/xattr.c:684 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:684
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
INFO: task syz-executor.5:11681 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:0     pid:11681 ppid:6034   flags:0x0000000d
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x1368/0x23b8 kernel/sched/core.c:6669
 schedule+0xc4/0x170 kernel/sched/core.c:6745
 mb_cache_entry_wait_unused+0x140/0x228 fs/mbcache.c:148
 ext4_evict_ea_inode+0x130/0x2f0 fs/ext4/xattr.c:480
 ext4_evict_inode+0x174/0x10d8 fs/ext4/inode.c:180
 evict+0x260/0x68c fs/inode.c:665
 iput_final fs/inode.c:1747 [inline]
 iput+0x734/0x818 fs/inode.c:1773
 ext4_xattr_set_entry+0x12a4/0x2d7c fs/ext4/xattr.c:1856
 ext4_xattr_block_set+0x54c/0x2c64 fs/ext4/xattr.c:1956
 ext4_xattr_set_handle+0xb2c/0x12d8 fs/ext4/xattr.c:2442
 ext4_xattr_set+0x1e0/0x354 fs/ext4/xattr.c:2544
 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:201
 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:235
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:296
 vfs_setxattr+0x1a8/0x344 fs/xattr.c:322
 do_setxattr fs/xattr.c:630 [inline]
 setxattr+0x208/0x29c fs/xattr.c:653
 path_setxattr+0x17c/0x258 fs/xattr.c:672
 __do_sys_setxattr fs/xattr.c:688 [inline]
 __se_sys_setxattr fs/xattr.c:684 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:684
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffff80008e0c16d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: ffff80008e0c1a90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
 #0: ffff80008e0c1500 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326
1 lock held by udevd/5593:
 #0: ffff0000cc8c24c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x12c/0x8f8 block/bdev.c:747
2 locks held by getty/5735:
 #0: ffff0000cf0e4098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800092eb02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2176
2 locks held by kworker/u4:7/6253:
2 locks held by syz-executor.5/11668:
 #0: ffff00012a842460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394
 #1: ffff00012c995400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff00012c995400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x17c/0x344 fs/xattr.c:321
3 locks held by syz-executor.5/11677:
 #0: ffff00012a842460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394
 #1: ffff00012c995400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff00012c995400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x17c/0x344 fs/xattr.c:321
 #2: ffff00012c9950c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff00012c9950c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x1e0/0x12d8 fs/ext4/xattr.c:2357
3 locks held by syz-executor.5/11681:
 #0: ffff00012a842460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394
 #1: ffff0001300c2c00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff0001300c2c00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x17c/0x344 fs/xattr.c:321
 #2: ffff0001300c28c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff0001300c28c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x1e0/0x12d8 fs/ext4/xattr.c:2357
3 locks held by kworker/u4:25/12615:
 #0: ffff0000c1e4e938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2378
 #1: ffff8000a7427c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2380
 #2: ffff0000c18560e0 (&type->s_umount_key#39){.+.+}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:414
1 lock held by syz-executor.4/13622:
 #0: ffff0000cc8c24c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x150/0x28c block/bdev.c:986
1 lock held by syz-executor.5/13630:
 #0: ffff0000cc8c24c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x12c/0x8f8 block/bdev.c:747

=============================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/04 09:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e40939bbfc68 6e553898 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in vfs_setxattr
* Struck through repros no longer work on HEAD.