INFO: task syz-executor.0:5499 blocked for more than 143 seconds.
Not tainted 6.9.0-rc1-next-20240328-syzkaller-02532-ga6bd6c933339 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26328 pid:5499 tgid:5497 ppid:5432 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
bdev_release+0x1b0/0x9f0 block/bdev.c:1035
blkdev_release+0x15/0x20 block/fops.c:628
__fput+0x429/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:180
get_signal+0x15e6/0x1740 kernel/signal.c:2683
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:218
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f682e47c859
RSP: 002b:00007f682f2ba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f682e59bf80 RCX: 00007f682e47c859
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f682e4d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f682e59bf80 R15: 00007fffbab48128
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by klogd/4524:
#0: ffff8880b943e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
#2: ffff88807c31c618 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
#2: ffff88807c31c618 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4262
#3: ffff8880b943e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by getty/4833:
#0: ffff88802a99a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by udevd/5418:
#0: ffff8880202dd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:869
1 lock held by syz-executor.0/5499:
#0: ffff8880202dd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x1b0/0x9f0 block/bdev.c:1035
1 lock held by syz-executor.0/5805:
#0: ffff8880202dd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:869
1 lock held by syz-executor.0/5822:
#0: ffff8880202dd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:869
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc1-next-20240328-syzkaller-02532-ga6bd6c933339 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4524 Comm: klogd Not tainted 6.9.0-rc1-next-20240328-syzkaller-02532-ga6bd6c933339 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:preempt_count_add+0x63/0x190 kernel/sched/core.c:5874
Code: 0b a2 9e 7e 65 01 1d 04 a2 9e 7e 48 c7 c0 80 b6 72 94 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e4 00 00 00 83 3d 9d 84 0d 13 00 <75> 11 65 8b 05 dc a1 9e 7e 0f b6 c0 3d f5 00 00 00 73 5e 65 8b 05
RSP: 0018:ffffc90003c9f0c8 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff9472b603
RDX: ffff888043490000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc90003c9f1c0 R08: ffffffff8140c011 R09: ffffc90003c9f2b0
R10: 0000000000000003 R11: ffffffff81814a30 R12: ffff888043490000
R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000000
FS: 00007fc162bfb380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055568d1d1600 CR3: 000000002918c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xc1/0x2a00 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 mm/page_owner.c:302
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1110 [inline]
free_unref_page+0xd3c/0xec0 mm/page_alloc.c:2617
discard_slab mm/slub.c:2511 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2980
put_cpu_partial+0x17c/0x250 mm/slub.c:3055
__slab_free+0x2ea/0x3d0 mm/slub.c:4233
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3867 [inline]
slab_alloc_node mm/slub.c:3927 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x310 mm/slub.c:3970
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:658
alloc_skb include/linux/skbuff.h:1318 [inline]
alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6504
sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2795
unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:2019
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2199
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc162d5d9b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffde3d96cd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc162d5d9b5
RDX: 0000000000000096 RSI: 000055bc1f6e96c0 RDI: 0000000000000003
RBP: 000055bc1f6e4910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fc162eeb212 R14: 00007ffde3d96dd8 R15: 0000000000000000