INFO: task syz.2.22:5449 blocked for more than 143 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.22 state:D stack:22992 pid:5449 tgid:5449 ppid:5225 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
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:806 [inline]
exit_signals+0x4a9/0x5c0 kernel/signal.c:3027
do_exit+0x6b4/0x28e0 kernel/exit.c:896
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7fa497979e79
RSP: 002b:00007ffe717b7948 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa497979e79
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe717b799c R08: 00007ffe717b7a2f R09: 0000000000010d6c
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000010d6c R14: 00000000000108cc R15: 00007ffe717b79f0
INFO: task syz.2.22:5451 blocked for more than 143 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.22 state:D stack:23488 pid:5451 tgid:5449 ppid:5225 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
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:806 [inline]
exit_signals+0x4a9/0x5c0 kernel/signal.c:3027
do_exit+0x6b4/0x28e0 kernel/exit.c:896
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 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+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: 0033:0x7fa497979e79
RSP: 002b:00007fa498756038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: fffffffffffffe00 RBX: 00007fa497b15f80 RCX: 00007fa497979e79
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000006
RBP: 00007fa4979e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa497b15f80 R15: 00007ffe717b75e8
INFO: task syz.2.22:5453 blocked for more than 143 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.22 state:D stack:24440 pid:5453 tgid:5449 ppid:5225 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
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:806 [inline]
exit_signals+0x4a9/0x5c0 kernel/signal.c:3027
do_exit+0x6b4/0x28e0 kernel/exit.c:896
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 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+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: 0033:0x7fa497979e79
RSP: 002b:00007fa4987350e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fa497b16060 RCX: 00007fa497979e79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa497b16060
RBP: 00007fa497b16058 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa497b16064
R13: 0000000000000000 R14: 00007ffe717b7500 R15: 00007ffe717b75e8
INFO: task syz.0.21:5454 blocked for more than 144 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.21 state:D stack:24384 pid:5454 tgid:5454 ppid:5227 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
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:806 [inline]
cgroup_css_set_fork kernel/cgroup/cgroup.c:6482 [inline]
cgroup_can_fork+0xb97/0xc80 kernel/cgroup/cgroup.c:6611
copy_process+0x219b/0x3d50 kernel/fork.c:2468
kernel_clone+0x226/0x8f0 kernel/fork.c:2784
__do_sys_clone3 kernel/fork.c:3088 [inline]
__se_sys_clone3+0x2cb/0x350 kernel/fork.c:3067
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: 0033:0x7f565a1adea9
RSP: 002b:00007fff85f01378 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f565a1307f0 RCX: 00007f565a1adea9
RDX: 00007f565a1307f0 RSI: 0000000000000058 RDI: 00007fff85f013c0
RBP: 00007f565afe16c0 R08: 00007f565afe16c0 R09: 00007fff85f014a7
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007fff85f013c0 R15: 00007fff85f014a8
INFO: task syz.3.33:5456 blocked for more than 144 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.33 state:D stack:22968 pid:5456 tgid:5455 ppid:5223 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6826
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
cgroup_lock include/linux/cgroup.h:368 [inline]
cgroup_kn_lock_live+0xe6/0x290 kernel/cgroup/cgroup.c:1662
__cgroup_procs_write+0xf4/0x4f0 kernel/cgroup/cgroup.c:5198
cgroup_procs_write+0x29/0x50 kernel/cgroup/cgroup.c:5238
cgroup_file_write+0x2ce/0x6d0 kernel/cgroup/cgroup.c:4142
kernfs_fop_write_iter+0x3a1/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa79/0xc90 fs/read_write.c:590
ksys_write+0x183/0x2b0 fs/read_write.c:643
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: 0033:0x7f854b979e79
RSP: 002b:00007f854c71d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f854bb15f80 RCX: 00007f854b979e79
RDX: 0000000000000012 RSI: 0000000020000040 RDI: 000000000000000b
RBP: 00007f854b9e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f854bb15f80 R15: 00007ffc1f8da6e8
INFO: task syz.1.23:5457 blocked for more than 144 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.23 state:D stack:24384 pid:5457 tgid:5457 ppid:5224 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
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:806 [inline]
cgroup_css_set_fork kernel/cgroup/cgroup.c:6482 [inline]
cgroup_can_fork+0xb97/0xc80 kernel/cgroup/cgroup.c:6611
copy_process+0x219b/0x3d50 kernel/fork.c:2468
kernel_clone+0x226/0x8f0 kernel/fork.c:2784
__do_sys_clone3 kernel/fork.c:3088 [inline]
__se_sys_clone3+0x2cb/0x350 kernel/fork.c:3067
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: 0033:0x7f0a069adea9
RSP: 002b:00007fff77e666c8 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f0a069307f0 RCX: 00007f0a069adea9
RDX: 00007f0a069307f0 RSI: 0000000000000058 RDI: 00007fff77e66710
RBP: 00007f0a0769f6c0 R08: 00007f0a0769f6c0 R09: 00007fff77e667f7
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007fff77e66710 R15: 00007fff77e667f8
INFO: task syz.1.23:5464 blocked for more than 145 seconds.
Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.23 state:D stack:27152 pid:5464 tgid:5457 ppid:5224 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5311 [inline]
__schedule+0x184a/0x4b30 kernel/sched/core.c:6677
__schedule_loop kernel/sched/core.c:6754 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6769
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2559
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
kvm_vm_create_worker_thread+0x1d7/0x2c0 virt/kvm/kvm_main.c:6671
kvm_mmu_post_init_vm+0x40/0x90 arch/x86/kvm/mmu/mmu.c:7455
kvm_create_vm virt/kvm/kvm_main.c:1243 [inline]
kvm_dev_ioctl_create_vm virt/kvm/kvm_main.c:5496 [inline]
kvm_dev_ioctl+0x1556/0x2370 virt/kvm/kvm_main.c:5538
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
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: 0033:0x7f0a06979e79
RSP: 002b:00007f0a076c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0a06b16130 RCX: 00007f0a06979e79
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000006
RBP: 00007f0a069e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0a06b16130 R15: 00007fff77e667f8
Showing all locks held in the system:
1 lock held by kthreadd/2:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x219b/0x3d50 kernel/fork.c:2468
1 lock held by khungtaskd/30:
#0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
1 lock held by syslogd/4663:
#0: ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595
1 lock held by udevd/4681:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x219b/0x3d50 kernel/fork.c:2468
1 lock held by dhcpcd/4895:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x219b/0x3d50 kernel/fork.c:2468
2 locks held by getty/4979:
#0: ffff88802c4000a0 (&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
1 lock held by syz-executor/5222:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5228:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5235:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5238:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
4 locks held by kworker/0:4/5277:
#0: ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595
#1: ffff8880b9028948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a7/0x770 kernel/sched/psi.c:977
#2: ffffffff951b7fb8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_deactivate+0x158/0x390 lib/debugobjects.c:764
#3: ffffffff95205388 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16d/0x510 lib/debugobjects.c:709
1 lock held by syz.4.11/5421:
1 lock held by udevd/5436:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.2.22/5449:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.2.22/5451:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.2.22/5453:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.0.21/5454:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x219b/0x3d50 kernel/fork.c:2468
1 lock held by syz.0.21/5459:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.0.21/5465:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.3.33/5455:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
4 locks held by syz.3.33/5456:
#0: ffff88802d161b08 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x24e/0x310 fs/file.c:1160
#1: ffff888024150420 (sb_writers#10){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2910 [inline]
#1: ffff888024150420 (sb_writers#10){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#2: ffff888020495088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#3: ffffffff8e9677e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#3: ffffffff8e9677e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0xe6/0x290 kernel/cgroup/cgroup.c:1662
1 lock held by syz.1.23/5457:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x219b/0x3d50 kernel/fork.c:2468
1 lock held by syz.1.23/5458:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by syz.1.23/5463:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5460:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5461:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
1 lock held by udevd/5462:
#0: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x28e0 kernel/exit.c:896
3 locks held by kvm-nx-lpage-re/5466:
#0: ffffffff8e9677e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#0: ffffffff8e9677e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x27/0xe0 kernel/cgroup/cgroup-v1.c:61
#1: ffffffff8e7d3a30 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock+0x11/0x40 kernel/cgroup/cgroup.c:2435
#2: ffffffff8e9679d0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_task_all+0x31/0xe0 kernel/cgroup/cgroup-v1.c:62
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__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+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: 1014 Comm: kworker/u8:5 Not tainted 6.11.0-rc4-next-20240823-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x12c/0x360 kernel/locking/lockdep.c:4703
Code: c7 c7 e0 c8 0a 8c 48 c7 c6 80 cb 0a 8c e8 5c 22 e5 ff 90 0f 0b 90 90 90 31 db 48 83 c3 60 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 0a 12 8c 00 41 bc 01 00 00 00 44 85 33 74 16 44
RSP: 0018:ffffc90003cdf848 EFLAGS: 00000046
RAX: 1ffffffff2690e1d RBX: ffffffff934870e8 RCX: ffffffff8170808a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff937b3800
RBP: 0000000000000009 R08: ffffffff937b3807 R09: 1ffffffff26f6700
R10: dffffc0000000000 R11: fffffbfff26f6701 R12: ffff8880225f9e00
R13: dffffc0000000000 R14: 0000000000000200 R15: ffff8880225fa930
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557458a5c8 CR3: 000000000e736000 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+0xc35/0x2050 kernel/locking/lockdep.c:5156
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_process_nc_paths+0xd6/0x3a0 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x52c/0x610 net/batman-adv/network-coding.c:735
process_one_work kernel/workqueue.c:3232 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313
worker_thread+0x86d/0xd10 kernel/workqueue.c:3390
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