INFO: task syz-executor:11319 blocked for more than 143 seconds.
Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:23680 pid:11319 tgid:11319 ppid:5212 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:787 [inline]
exit_signals+0x4a9/0x5c0 kernel/signal.c:3008
do_exit+0x6b4/0x27f0 kernel/exit.c:839
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2917
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+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3e33573113
RSP: 002b:00007ffee5a90798 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000002c41 RCX: 00007f3e33573113
RDX: 0000000040000000 RSI: 00007ffee5a907ac RDI: 00000000ffffffff
RBP: 00007ffee5a907ac R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000c
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
INFO: task syz-executor:11331 blocked for more than 143 seconds.
Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21728 pid:11331 tgid:11331 ppid:11322 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:787 [inline]
cgroup_css_set_fork kernel/cgroup/cgroup.c:6417 [inline]
cgroup_can_fork+0xb97/0xc80 kernel/cgroup/cgroup.c:6546
copy_process+0x21f1/0x3dc0 kernel/fork.c:2470
kernel_clone+0x223/0x880 kernel/fork.c:2781
__do_sys_clone kernel/fork.c:2924 [inline]
__se_sys_clone kernel/fork.c:2908 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2908
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: 0033:0x7fcdf8573753
RSP: 002b:00007ffcd28cab08 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdf8573753
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556c9c67d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000d341c R14: 00000000000d338a R15: 00007ffcd28cac90
Showing all locks held in the system:
3 locks held by kworker/0:1/9:
2 locks held by kworker/u8:1/12:
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90000117d00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90000117d00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
1 lock held by khungtaskd/30:
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
1 lock held by kworker/u9:0/54:
#0: ffffffff8e766090 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
2 locks held by kworker/u8:7/2896:
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc9000975fd00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc9000975fd00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
2 locks held by getty/4983:
#0: ffff8880305ce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:10/5941:
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90003cbfd00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90003cbfd00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
1 lock held by kworker/0:8/6288:
#0: ffffffff8e766090 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
1 lock held by kworker/u8:0/10079:
#0: ffffffff8e766090 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
2 locks held by kworker/u8:11/10138:
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90004ab7d00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90004ab7d00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
1 lock held by syz-executor/11319:
#0: ffffffff8e766090 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
1 lock held by syz-executor/11331:
#0: ffffffff8e766090 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x21f1/0x3dc0 kernel/fork.c:2470
6 locks held by syz-executor/11591:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11816 Comm: syz.1.1832 Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:retarget_shared_pending+0x201/0x470 kernel/signal.c:2983
Code: 74 08 4c 89 ef e8 bf 4a 9d 00 4d 8b 65 00 4c 3b 64 24 28 0f 84 2a 02 00 00 49 8d 5c 24 2c 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 7e 8b 1b 89 de 83 e6 04 31 ff e8 1d 2d 39 00 83 e3 04 0f
RSP: 0018:ffffc90009567aa0 EFLAGS: 00000803
RAX: 0000000000000000 RBX: ffff8880666e5a2c RCX: 0000000000040000
RDX: ffffc90010131000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90009567b70 R08: ffffffff815a63ca R09: 1ffff11003bef780
R10: dffffc0000000000 R11: ffffed1003bef781 R12: ffff8880666e5a00
R13: ffff88801df79e00 R14: dffffc0000000000 R15: ffffc90009567b00
FS: 00007f815c0396c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000031ba6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__set_task_blocked kernel/signal.c:3075 [inline]
__set_current_blocked+0x297/0x380 kernel/signal.c:3106
set_current_blocked kernel/signal.c:3091 [inline]
signal_delivered kernel/signal.c:2953 [inline]
signal_setup_done+0x39e/0x600 kernel/signal.c:2965
handle_signal arch/x86/kernel/signal.c:285 [inline]
arch_do_signal_or_restart+0x51f/0x860 arch/x86/kernel/signal.c:312
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+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f815b1a5130
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d da be 06 00 e8 15 92 f8 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007f815c038a78 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f815b335f80 RCX: 00007f815b17cef9
RDX: 00007f815c038a80 RSI: 00007f815c038bb0 RDI: 0000000000000021
RBP: 00007f815b1ef01e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f815b335f80 R15: 00007fff74ac5488