INFO: task syz.1.3715:17669 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3715 state:D stack:26064 pid:17669 tgid:17668 ppid:14883 flags:0x00024000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1249 [inline]
io_wq_put_and_exit+0x232/0x8a0 io_uring/io-wq.c:1277
io_uring_clean_tctx+0x10e/0x190 io_uring/tctx.c:193
io_uring_cancel_generic+0x678/0x800 io_uring/io_uring.c:3219
io_uring_files_cancel include/linux/io_uring.h:20 [inline]
do_exit+0x541/0x2d70 kernel/exit.c:895
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
get_signal+0x25fb/0x2770 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
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+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa6f457e719
RSP: 002b:00007fa6f52f70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fa6f4735f88 RCX: 00007fa6f457e719
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa6f4735f88
RBP: 00007fa6f4735f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa6f4735f8c
R13: 0000000000000000 R14: 00007ffe6a49b5e0 R15: 00007ffe6a49b6c8
Showing all locks held in the system:
5 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
1 lock held by udevd/5201:
#0: ffff8880b873ee98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
2 locks held by getty/5584:
#0: ffff888036e0a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by iou-wrk-17669/17672:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17673:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17674:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17675:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17676:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17677:
1 lock held by iou-wrk-17669/17678:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
1 lock held by iou-wrk-17669/17679:
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:249 [inline]
#0: ffff888025d8e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0x906/0xdc0 io_uring/kbuf.c:580
2 locks held by kworker/u8:12/18849:
#0: ffff88801eb8a148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90012827d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
4 locks held by kvm-nx-lpage-re/19322:
#0: ffffffff8e20f448 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#0: ffffffff8e20f448 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x25/0x130 kernel/cgroup/cgroup-v1.c:67
#1: ffffffff8e05b950 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock+0x12/0x40 kernel/cgroup/cgroup.c:2435
#2: ffffffff8e20f210 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2437 [inline]
#2: ffffffff8e20f210 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock+0x37/0x40 kernel/cgroup/cgroup.c:2433
#3: ffffffff8e1c3c38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5811 Comm: syz-executor Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:mark_lock+0x6/0xc60 kernel/locking/lockdep.c:4686
Code: e9 db fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 <41> 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 55 41 54 53 48 83
RSP: 0018:ffffc90004387808 EFLAGS: 00000002
RAX: 000000000000000c RBX: ffff888028cf5382 RCX: 0000000000000007
RDX: 0000000000000008 RSI: ffff888028cf5360 RDI: ffff888028cf4880
RBP: ffffc90004387810 R08: 0000000000000000 R09: fffffbfff2dc5588
R10: ffffffff96e2ac47 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888028cf5360 R14: 0000000000000004 R15: ffff888028cf4880
FS: 00005555575c9500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23b3f09178 CR3: 0000000029b92000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4646 [inline]
__lock_acquire+0x906/0x3ce0 kernel/locking/lockdep.c:5156
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
raw_spin_rq_lock kernel/sched/sched.h:1505 [inline]
rq_lock kernel/sched/sched.h:1804 [inline]
__schedule+0x2a1/0x5730 kernel/sched/core.c:6589
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
do_nanosleep+0x216/0x510 kernel/time/hrtimer.c:2032
hrtimer_nanosleep+0x146/0x370 kernel/time/hrtimer.c:2080
common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1365
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1411 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1388 [inline]
__x64_sys_clock_nanosleep+0x344/0x4a0 kernel/time/posix-timers.c:1388
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f74745b07c3
Code: 1f 84 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 7e cd 15 00 00 74 14 b8 e6 00 00 00 0f 05 d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007fff65775ae8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74745b07c3
RDX: 00007fff65775b00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 000000000002f278 R09: 00007f74743fa080
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff65775f50
R13: 0000000000000004 R14: 00007fff65775b3c R15: 00007fff65775bd0