INFO: task syz-executor.3:26292 blocked for more than 143 seconds.
Not tainted 6.4.0-rc6-syzkaller-00269-g1b29d271614a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26648 pid:26292 ppid:5051 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
io_schedule+0xbe/0x130 kernel/sched/core.c:8979
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:955 [inline]
folio_lock include/linux/pagemap.h:951 [inline]
__filemap_get_folio+0x789/0x990 mm/filemap.c:1937
truncate_inode_pages_range+0x350/0xf10 mm/truncate.c:377
kill_bdev block/bdev.c:76 [inline]
blkdev_flush_mapping+0x152/0x320 block/bdev.c:596
blkdev_put_whole+0xcb/0xf0 block/bdev.c:627
blkdev_put+0x220/0x780 block/bdev.c:887
blkdev_close+0x68/0x80 block/fops.c:507
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xaa3/0x29b0 kernel/exit.c:874
do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
get_signal+0x2318/0x25b0 kernel/signal.c:2876
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1c81e3e404
RSP: 002b:00007f1c82b1eca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: 0000000000000006 RBX: 6666666666666667 RCX: 00007f1c81e3e404
RDX: 0000000000000000 RSI: 00007f1c82b1ed40 RDI: 00000000ffffff9c
RBP: 00007f1c82b1ed40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fff3f5193af R14: 00007f1c82b1f300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c7984b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7981b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8c7990c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559
2 locks held by udevd/4454:
2 locks held by getty/4753:
#0: ffff88802862c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
2 locks held by kworker/u4:8/22720:
1 lock held by syz-executor.3/26292:
#0: ffff88801f67d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xba/0x780 block/bdev.c:845
1 lock held by syz-executor.3/26374:
#0: ffff88801f67d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x95/0xb80 block/bdev.c:747
1 lock held by syz-executor.3/26445:
#0: ffff88801f67d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x95/0xb80 block/bdev.c:747
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc6-syzkaller-00269-g1b29d271614a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4454 Comm: udevd Not tainted 6.4.0-rc6-syzkaller-00269-g1b29d271614a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:stack_trace_consume_entry+0xd7/0x160 kernel/stacktrace.c:93
Code: 02 00 0f 85 92 00 00 00 8d 45 01 89 43 10 48 8b 03 48 8d 2c e8 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 5c 48 89 75 00 8b 43 08 39 43 10 0f 92 c0 48 83 c4 08 5b 5d c3
RSP: 0018:ffffc9000316f948 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9000316fa20 RCX: 0000000000000000
RDX: 1ffff9200062df53 RSI: ffffffff81d6ebf5 RDI: ffffc9000316fa2c
RBP: ffffc9000316fa98 R08: ffffffff8f0e0d52 R09: ffffc9000316fca0
R10: ffffc9000316f968 R11: 0000000000094001 R12: ffffc9000316fa20
R13: 0000000000000000 R14: ffff88807d8ed940 R15: 0000000000000000
FS: 00007ff3f9bcec80(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c022992000 CR3: 000000001a314000 CR4: 0000000000350ef0
Call Trace:
arch_stack_walk+0x71/0xf0 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slub.c:3451 [inline]
slab_alloc mm/slub.c:3459 [inline]
__kmem_cache_alloc_lru mm/slub.c:3466 [inline]
kmem_cache_alloc_lru+0x20a/0x600 mm/slub.c:3482
__d_alloc+0x32/0x980 fs/dcache.c:1769
d_alloc+0x4e/0x240 fs/dcache.c:1849
lookup_one_qstr_excl+0xcc/0x180 fs/namei.c:1601
do_unlinkat+0x298/0x680 fs/namei.c:4379
__do_sys_unlink fs/namei.c:4441 [inline]
__se_sys_unlink fs/namei.c:4439 [inline]
__x64_sys_unlink+0xca/0x110 fs/namei.c:4439
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff3f9717da7
Code: f0 ff ff 73 01 c3 48 8b 0d 7e 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc7d87c328 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff3f9717da7
RDX: 0000000000000000 RSI: 0000000037e8be80 RDI: 000056428d4c70d8
RBP: 000056428e8a7f10 R08: 0000000037eea0ca R09: 00007ffc7d8c6080
R10: 00007ffc7d8c6090 R11: 0000000000000202 R12: 0000000000000bb8
R13: 000056428e8b7e10 R14: 0000000000000000 R15: 0000000000000000