INFO: task syz-executor.0:6163 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc4-syzkaller-g3964f82a4dfc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:25552 pid:6163  tgid:6163  ppid:6143   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 bdev_release+0x17e/0x700 block/bdev.c:1087
 blkdev_release+0x15/0x20 block/fops.c:639
 __fput+0x241/0x880 fs/file_table.c:431
 __do_sys_close fs/open.c:1567 [inline]
 __se_sys_close fs/open.c:1552 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1552
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb614c7890a
RSP: 002b:00007ffc7af95530 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fb614c7890a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fb614d8d960 R08: 0000001b33a60000 R09: 7fffffffffffffff
R10: 00007fb615e820b8 R11: 0000000000000293 R12: 0000000000015818
R13: 00007fb614d8c03c R14: 0000000000015525 R15: 00007fb615190000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
1 lock held by syslogd/5192:
 #0: ffff8880b873ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
1 lock held by klogd/5199:
 #0: ffff8880b873ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
2 locks held by getty/5591:
 #0: ffff8880310010a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by udevd/6131:
 #0: ffff88802551b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/6163:
 #0: ffff88802551b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x17e/0x700 block/bdev.c:1087

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-syzkaller-g3964f82a4dfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5192 Comm: syslogd Not tainted 6.12.0-rc4-syzkaller-g3964f82a4dfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__asan_memcpy+0x6/0x70 mm/kasan/shadow.c:104
Code: 41 5c 41 5e 41 5f e9 c4 a0 f1 09 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 41 54 53 49 89 d4 49 89 f6 49 89 ff 48 8b 5c 24 20 48 89 f7
RSP: 0018:ffffc90010107b70 EFLAGS: 00000202
RAX: ffffc90010107bc0 RBX: ffffc90010107bc0 RCX: 0000000000000000
RDX: 0000000000000028 RSI: ffffc90010107d90 RDI: ffffc90010107bd0
RBP: ffffc90010107cb0 R08: ffffc90010107c07 R09: ffffc90010107bc0
R10: dffffc0000000000 R11: fffff52002020f81 R12: ffffc90010107bd0
R13: 1ffff92002020f74 R14: ffffc90010107d40 R15: ffff888034fcf6c0
FS:  00007fd5f9ba4380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d0db3b8680 CR3: 000000006c18a000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 sock_read_iter+0xf2/0x3d0 net/socket.c:1130
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x9bd/0xbc0 fs/read_write.c:569
 ksys_read+0x183/0x2b0 fs/read_write.c:712
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd5f9cf8b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdb87544b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd5f9cf8b6a
RDX: 00000000000000ff RSI: 00005575daa26950 RDI: 0000000000000000
RBP: 00005575daa26910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007fd5f9e973a3 R11: 0000000000000246 R12: 00005575daa2699c
R13: 00005575daa26950 R14: 0000000000000000 R15: 00007fd5f9edba80
 </TASK>