INFO: task udevd:21356 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-syzkaller-00148-gec7f49619d8e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:25976 pid:21356 ppid: 2966 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
io_schedule+0xba/0x130 kernel/sched/core.c:8563
folio_wait_bit_common+0x4f2/0xa90 mm/filemap.c:1324
folio_wait_bit mm/filemap.c:1473 [inline]
folio_wait_locked include/linux/pagemap.h:976 [inline]
folio_wait_locked include/linux/pagemap.h:973 [inline]
do_read_cache_folio+0x506/0x760 mm/filemap.c:3516
do_read_cache_page mm/filemap.c:3588 [inline]
read_cache_page+0x59/0x2a0 mm/filemap.c:3597
read_mapping_page include/linux/pagemap.h:759 [inline]
read_part_sector+0xf6/0x920 block/partitions/core.c:723
adfspart_check_ICS+0x9a/0x690 block/partitions/acorn.c:360
check_partition block/partitions/core.c:147 [inline]
blk_add_partitions block/partitions/core.c:608 [inline]
bdev_disk_changed block/partitions/core.c:694 [inline]
bdev_disk_changed+0x629/0xf60 block/partitions/core.c:661
blkdev_get_whole+0x206/0x2d0 block/bdev.c:679
blkdev_get_by_dev.part.0+0x5d2/0xc80 block/bdev.c:816
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:850
blkdev_open+0x13c/0x2c0 block/fops.c:498
do_dentry_open+0x4a1/0x11e0 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4c0 fs/open.c:1213
do_sys_open fs/open.c:1229 [inline]
__do_sys_openat fs/open.c:1245 [inline]
__se_sys_openat fs/open.c:1240 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1240
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5017f25697
RSP: 002b:00007ffca2e73590 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055bbfdf53700 RCX: 00007f5017f25697
RDX: 00000000000a0800 RSI: 000055bbfdeccc60 RDI: 00000000ffffff9c
RBP: 000055bbfdeccc60 R08: 0000000000000001 R09: 00007ffca2ee4080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055bbfded1b20 R14: 0000000000000001 R15: 000055bbfdea02c0
INFO: task syz-executor.4:9249 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-syzkaller-00148-gec7f49619d8e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27976 pid: 9249 ppid: 3624 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6519
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
blkdev_put+0x99/0x950 block/bdev.c:905
blkdev_close+0x64/0x80 block/fops.c:512
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
get_signal+0x1c5/0x24c0 kernel/signal.c:2641
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0f8b4890e9
RSP: 002b:00007f0f8c651168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f0f8b59bf60 RCX: 00007f0f8b4890e9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f0f8b4e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc53accb6f R14: 00007f0f8c651300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd7f5e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
2 locks held by getty/3275:
#0: ffff88807f57f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001bf92e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
1 lock held by udevd/21356:
#0: ffff88801c41d118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xc80 block/bdev.c:807
1 lock held by syz-executor.4/9249:
#0: ffff88801c41d118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x99/0x950 block/bdev.c:905
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc6-syzkaller-00148-gec7f49619d8e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 29033 Comm: kworker/u4:5 Not tainted 5.18.0-rc6-syzkaller-00148-gec7f49619d8e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__rq_lockp kernel/sched/sched.h:1172 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1288 [inline]
RIP: 0010:rq_clock kernel/sched/sched.h:1443 [inline]
RIP: 0010:newidle_balance+0x1d0/0x1190 kernel/sched/fair.c:10922
Code: 0f 85 a7 0d 00 00 44 8b 1d 69 f7 62 0c 45 85 db 74 51 48 8d bb 58 0d 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 44 0c 00 00 44 8b 93 58 0d 00
RSP: 0018:ffffc900044d7878 EFLAGS: 00000806
RAX: dffffc0000000000 RBX: ffff8880b9c3a080 RCX: 1ffffffff1b72301
RDX: 1ffff110173875bb RSI: 0000000000000000 RDI: ffff8880b9c3add8
RBP: 0000000100023ed2 R08: 0000000000000000 R09: ffffffff8db8e457
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffed101738742a R15: ffff8880b9c3a080
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c003154808 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pick_next_task_fair+0x96/0xe20 kernel/sched/fair.c:7387
__pick_next_task kernel/sched/core.c:5695 [inline]
pick_next_task kernel/sched/core.c:5770 [inline]
__schedule+0x3e8/0x4cc0 kernel/sched/core.c:6352
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1884
toggle_allocation_gate mm/kfence/core.c:781 [inline]
toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:766
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
----------------
Code disassembly (best guess):
0: 0f 85 a7 0d 00 00 jne 0xdad
6: 44 8b 1d 69 f7 62 0c mov 0xc62f769(%rip),%r11d # 0xc62f776
d: 45 85 db test %r11d,%r11d
10: 74 51 je 0x63
12: 48 8d bb 58 0d 00 00 lea 0xd58(%rbx),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e 44 0c 00 00 jle 0xc7e
3a: 44 rex.R
3b: 8b .byte 0x8b
3c: 93 xchg %eax,%ebx
3d: 58 pop %rax
3e: 0d .byte 0xd