INFO: task syz.8.24:6153 blocked for more than 143 seconds.
Not tainted 5.15.185-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.24 state:D stack:27680 pid: 6153 ppid: 6130 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blk_ioctl_zeroout block/ioctl.c:183 [inline]
blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
blkdev_ioctl+0x295/0x690 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4b32d83d29
RSP: 002b:00007f4b31ffc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4b32f73fa0 RCX: 00007f4b32d83d29
RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007f4b32dffb08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4b32f73fa0 R15: 00007ffc16691bb8
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3936:
#0: ffff88802bccc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025d62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
2 locks held by kworker/1:17/4296:
#0: ffff888016872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900046dfd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
2 locks held by kworker/u4:5/4326:
#0: ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#1: ffff8880b9027848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891
1 lock held by syz.7.23/5989:
1 lock held by syz.8.24/6153:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.9.25/6302:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.0.26/6523:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.1.27/7010:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.2.28/7405:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.3.29/7878:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.4.30/8306:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.5.31/8802:
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140859538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
2 locks held by dhcpcd/9061:
#0: ffff8880747ac120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline]
#0: ffff8880747ac120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x35/0xce0 net/packet/af_packet.c:3213
#1: ffffffff8c120a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8c120a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845
2 locks held by dhcpcd/9062:
#0: ffff88805224c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline]
#0: ffff88805224c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x35/0xce0 net/packet/af_packet.c:3213
#1: ffffffff8c120a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#1: ffffffff8c120a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x320/0x6b0 kernel/rcu/tree_exp.h:845
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4327 Comm: kworker/u4:6 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: 0x0 (phy23)
RIP: 0010:put_pwq kernel/workqueue.c:1134 [inline]
RIP: 0010:pwq_dec_nr_in_flight+0x1a2/0x450 kernel/workqueue.c:1233
Code: df e8 42 61 6f 00 48 8b 3b 48 83 c7 18 be ff ff ff ff e8 21 96 53 08 89 c5 31 ff 89 c6 e8 76 ec 29 00 85 ed 0f 84 e0 00 00 00 09 e9 29 00 eb 05 e8 02 e9 29 00 4c 8d 73 18 4c 89 f0 48 c1 e8
RSP: 0018:ffffc9000473fc08 EFLAGS: 00000002
RAX: ffffffff814dd90a RBX: ffff888054194c00 RCX: ffff888018bb9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffff888143fbf610
R10: ffffed10287f7ec5 R11: 1ffff110287f7ec2 R12: 00000000ffffffff
R13: dffffc0000000000 R14: 1ffff1100a832982 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd06d23310 CR3: 000000001efdb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work+0xb1b/0x1000 kernel/workqueue.c:2353
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287