INFO: task syz-executor.1:4086 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23888 pid: 4086 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
unregister_shrinker mm/vmscan.c:678 [inline]
unregister_shrinker+0x5c/0x2b0 mm/vmscan.c:673
xfs_unmountfs+0xfd/0x1a0 fs/xfs/xfs_mount.c:1071
xfs_fs_put_super+0x62/0x370 fs/xfs/xfs_super.c:1107
generic_shutdown_super+0x12e/0x3a0 fs/super.c:465
kill_block_super+0x90/0xd0 fs/super.c:1397
deactivate_locked_super+0x7b/0x130 fs/super.c:335
cleanup_mnt+0x324/0x4d0 fs/namespace.c:1137
task_work_run+0xc0/0x160 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5f5b84d537
RSP: 002b:00007ffc57f76c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5f5b84d537
RDX: 00007ffc57f76cea RSI: 000000000000000a RDI: 00007ffc57f76ce0
RBP: 00007ffc57f76ce0 R08: 00000000ffffffff R09: 00007ffc57f76ab0
R10: 0000555555f418b3 R11: 0000000000000246 R12: 00007f5f5b8a6b24
R13: 00007ffc57f77da0 R14: 0000555555f41810 R15: 00007ffc57f77de0
INFO: task syz-executor.5:6548 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25712 pid: 6548 ppid: 4091 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
xfs_qm_dqfree_one+0x68/0x160 fs/xfs/xfs_qm.c:1600
xfs_qm_shrink_scan fs/xfs/xfs_qm.c:523 [inline]
xfs_qm_shrink_scan+0x1bf/0x340 fs/xfs/xfs_qm.c:495
do_shrink_slab+0x33b/0x940 mm/vmscan.c:773
shrink_slab+0x151/0x580 mm/vmscan.c:933
drop_slab_node+0x86/0x110 mm/vmscan.c:968
drop_slab+0x69/0xd0 mm/vmscan.c:978
drop_caches_sysctl_handler+0x6d/0x80 fs/drop_caches.c:66
proc_sys_call_handler+0x35b/0x4f0 fs/proc/proc_sysctl.c:586
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x336/0x6d0 fs/read_write.c:725
do_iter_write+0x12a/0x620 fs/read_write.c:851
iter_file_splice_write+0x598/0xaf0 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0xfb/0x1c0 fs/splice.c:936
splice_direct_to_actor+0x2dd/0x7c0 fs/splice.c:891
do_splice_direct+0x154/0x260 fs/splice.c:979
do_sendfile+0x91e/0x1110 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1304 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x11a/0x1d0 fs/read_write.c:1296
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9e892d80c9
RSP: 002b:00007f9e8864a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f9e893f7f80 RCX: 00007f9e892d80c9
RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f9e89333ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeff146f4f R14: 00007f9e8864a300 R15: 0000000000022000
INFO: task syz-executor.2:6563 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26032 pid: 6563 ppid: 4078 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
register_shrinker_prepared mm/vmscan.c:653 [inline]
register_shrinker+0x2f/0x120 mm/vmscan.c:665
xfs_qm_init_quotainfo+0x589/0x970 fs/xfs/xfs_qm.c:689
xfs_qm_mount_quotas+0x44/0x4c0 fs/xfs/xfs_qm.c:1421
xfs_mountfs+0x1714/0x1ad0 fs/xfs/xfs_mount.c:918
xfs_fs_fill_super+0xe99/0x19b0 fs/xfs/xfs_super.c:1658
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ca67675fa
RSP: 002b:00007f3ca5ad7f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000975f RCX: 00007f3ca67675fa
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007f3ca5ad7fe0
RBP: 00007f3ca5ad8020 R08: 00007f3ca5ad8020 R09: 0000000000008012
R10: 0000000000008012 R11: 0000000000000246 R12: 0000000020000040
R13: 0000000020000180 R14: 00007f3ca5ad7fe0 R15: 0000000020000080
INFO: task syz-executor.3:6569 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:25904 pid: 6569 ppid: 4081 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
xfs_buf_iowait+0x56/0x3c0 fs/xfs/xfs_buf.c:1573
xfs_buf_delwri_pushbuf+0x207/0x460 fs/xfs/xfs_buf.c:2251
xfs_qm_flush_one+0x1fb/0x2b0 fs/xfs/xfs_qm.c:1249
xfs_qm_dquot_walk.isra.0+0x19e/0x2c0 fs/xfs/xfs_qm.c:86
xfs_qm_quotacheck+0x500/0x7c0 fs/xfs/xfs_qm.c:1328
xfs_qm_mount_quotas+0xc6/0x4c0 fs/xfs/xfs_qm.c:1434
xfs_mountfs+0x1714/0x1ad0 fs/xfs/xfs_mount.c:918
xfs_fs_fill_super+0xe99/0x19b0 fs/xfs/xfs_super.c:1658
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f07035705fa
RSP: 002b:00007f07028e0f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000975f RCX: 00007f07035705fa
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007f07028e0fe0
RBP: 00007f07028e1020 R08: 00007f07028e1020 R09: 0000000000008012
R10: 0000000000008012 R11: 0000000000000246 R12: 0000000020000040
R13: 0000000020000180 R14: 00007f07028e0fe0 R15: 0000000020000080
INFO: task syz-executor.0:6594 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27240 pid: 6594 ppid: 4085 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
alloc_super+0x7f4/0xa10 fs/super.c:270
sget_fc+0x10e/0x700 fs/super.c:533
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbd71eef5fa
RSP: 002b:00007fbd7125ff88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000975f RCX: 00007fbd71eef5fa
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007fbd7125ffe0
RBP: 00007fbd71260020 R08: 00007fbd71260020 R09: 0000000000008012
R10: 0000000000008012 R11: 0000000000000246 R12: 0000000020000040
R13: 0000000020000180 R14: 00007fbd7125ffe0 R15: 0000000020000080
INFO: task syz-executor.4:6596 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27240 pid: 6596 ppid: 4098 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
alloc_super+0x7f4/0xa10 fs/super.c:270
sget_fc+0x10e/0x700 fs/super.c:533
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4d19e395fa
RSP: 002b:00007f4d191a9f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000975f RCX: 00007f4d19e395fa
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007f4d191a9fe0
RBP: 00007f4d191aa020 R08: 00007f4d191aa020 R09: 0000000000008012
R10: 0000000000008012 R11: 0000000000000246 R12: 0000000020000040
R13: 0000000020000180 R14: 00007f4d191a9fe0 R15: 0000000020000080
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b37cac0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
5 locks held by kworker/u4:4/1120:
2 locks held by getty/3285:
#0: ffff88814a4dd098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900027a32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9e1/0xee0 drivers/tty/n_tty.c:2113
2 locks held by syz-executor.1/4086:
#0: ffff888060d760e0 (&type->s_umount_key#50){++++}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker mm/vmscan.c:678 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x5c/0x2b0 mm/vmscan.c:673
3 locks held by syz-executor.5/6548:
#0: ffff88807e66e460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1304 [inline]
#0: ffff88807e66e460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1296 [inline]
#0: ffff88807e66e460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x11a/0x1d0 fs/read_write.c:1296
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0xb3/0x580 mm/vmscan.c:923
#2: ffff888078946958 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dqfree_one+0x68/0x160 fs/xfs/xfs_qm.c:1600
2 locks held by syz-executor.2/6563:
#0: ffff888063b800e0 (&type->s_umount_key#48/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: register_shrinker_prepared mm/vmscan.c:653 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: register_shrinker+0x2f/0x120 mm/vmscan.c:665
3 locks held by syz-executor.3/6569:
#0: ffff88801c9460e0 (&type->s_umount_key#48/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffff888078946958 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk.isra.0+0xe6/0x2c0 fs/xfs/xfs_qm.c:73
#2: ffff888019c455d8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
#2: ffff888019c455d8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_qm_flush_one+0x96/0x2b0 fs/xfs/xfs_qm.c:1225
3 locks held by syz-executor.0/6594:
#0: ffff88801a434118 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff88807ceaa0e0 (&type->s_umount_key#48/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#2: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#2: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
3 locks held by syz-executor.4/6596:
#0: ffff888145bd8658 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff88801928e0e0 (&type->s_umount_key#48/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#2: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#2: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.5/6598:
#0: ffff8880563c60e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.2/6604:
#0: ffff88805561a0e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.3/6607:
#0: ffff8880555e00e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.4/6610:
#0: ffff8880563de0e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.0/6613:
#0: ffff888054c280e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.5/6622:
#0: ffff888052f3e0e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.2/6626:
#0: ffff88807d4cc0e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.3/6630:
#0: ffff8880639ba0e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.4/6633:
#0: ffff88805dfe60e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
2 locks held by syz-executor.0/6636:
#0: ffff8880587d40e0 (&type->s_umount_key#23/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline]
#1: ffffffff8b4649f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xf5/0x6a0 mm/vmscan.c:620
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x11a/0x160 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4526 Comm: kworker/u4:7 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xde/0x180 mm/kasan/generic.c:189
Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c
RSP: 0018:ffffc900034d7960 EFLAGS: 00000046
RAX: fffffbfff1fb2f50 RBX: fffffbfff1fb2f51 RCX: ffffffff81549236
RDX: fffffbfff1fb2f51 RSI: 0000000000000008 RDI: ffffffff8fd97a80
RBP: fffffbfff1fb2f50 R08: 0000000000000000 R09: ffffffff8fd97a87
R10: fffffbfff1fb2f50 R11: 000000000008008a R12: ffff888076ba8ad8
R13: ffff888076ba8000 R14: 0000000000020000 R15: 0000000000020028
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005574761fd120 CR3: 000000001d06c000 CR4: 0000000000350ef0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:199 [inline]
check_wait_context kernel/locking/lockdep.c:4700 [inline]
__lock_acquire+0x3e6/0x54a0 kernel/locking/lockdep.c:4977
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:755 [inline]
batadv_iv_ogm_schedule_buff+0x4d0/0x1030 net/batman-adv/bat_iv_ogm.c:826
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x59f/0x8f0 net/batman-adv/bat_iv_ogm.c:1713
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295