INFO: task syz-executor:5921 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20560 pid:5921 tgid:5921 ppid:1 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x185a/0x4b70 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
mmap_write_lock include/linux/mmap_lock.h:106 [inline]
exit_mmap+0x2bd/0xc40 mm/mmap.c:1882
__mmput+0x115/0x380 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x28e0 kernel/exit.c:926
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x16a3/0x1740 kernel/signal.c:2917
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: 0033:0x7f42b8774853
RSP: 002b:00007fff2795e918 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f42b8774853
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556f3e37d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000002789e R14: 00000000000277ec R15: 00007fff2795eaa0
</TASK>
INFO: task syz.0.445:6932 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.445 state:D stack:23808 pid:6932 tgid:6932 ppid:5798 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x185a/0x4b70 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
mmap_write_lock include/linux/mmap_lock.h:106 [inline]
exit_mmap+0x2bd/0xc40 mm/mmap.c:1882
__mmput+0x115/0x380 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x28e0 kernel/exit.c:926
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+0x2634/0x2640 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: 0033:0x7f37d8d7dff9
RSP: 002b:00007fff8995fd68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f37d8d7dff9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff8995fdbc R08: 0000000000000006 R09: 0000000000027782
R10: 00000000005efc9c R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000027782 R14: 00000000000276a7 R15: 00007fff8995fe10
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by udevd/4676:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
#1: ffff888075215718 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#1: ffff888075215718 (&mm->mmap_lock){++++}-{3:3}, at: dup_mmap kernel/fork.c:637 [inline]
#1: ffff888075215718 (&mm->mmap_lock){++++}-{3:3}, at: dup_mm kernel/fork.c:1674 [inline]
#1: ffff888075215718 (&mm->mmap_lock){++++}-{3:3}, at: copy_mm+0x2a5/0x1f40 kernel/fork.c:1723
2 locks held by getty/4977:
#0: ffff88803310a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5921:
#0: ffff88807be01e18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
#0: ffff88807be01e18 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1882
1 lock held by syz.0.445/6932:
#0: ffff888032251e18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
#0: ffff888032251e18 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1882
1 lock held by syz-executor/7055:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
1 lock held by syz-executor/7073:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
2 locks held by syz.3.751/7834:
#0: ffff888053f5ec90 (&uprobe->register_rwsem){+.+.}-{3:3}, at: uprobe_register+0x668/0x8b0 kernel/events/uprobes.c:1213
#1: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: register_for_each_vma+0x32/0xc50 kernel/events/uprobes.c:1073
1 lock held by syz-executor/7853:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
1 lock held by syz-executor/7854:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
1 lock held by syz-executor/7855:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
1 lock held by syz-executor/7856:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
1 lock held by syz-executor/7857:
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap kernel/fork.c:636 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1674 [inline]
#0: ffffffff8e9eb450 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x282/0x1f40 kernel/fork.c:1723
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5311 Comm: kworker/0:7 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:preempt_count_add+0x63/0x190 kernel/sched/core.c:5799
Code: 4b ab a0 7e 65 01 1d 44 ab a0 7e 48 c7 c0 40 a9 39 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e4 00 00 00 83 3d dd 7c d6 18 00 <75> 11 65 8b 05 1c ab a0 7e 0f b6 c0 3d f5 00 00 00 73 5e 65 8b 05
RSP: 0018:ffffc900043afb38 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff9a39a903
RDX: 0000000000000000 RSI: ffff8880255d9e00 RDI: 0000000000000001
RBP: ffffc900043afdc0 R08: ffffffff8f433d83 R09: 1ffffffff1e867b0
R10: dffffc0000000000 R11: fffffbfff1e867b1 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000004ba289d407 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5da44fff84 CR3: 000000003148e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
__raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock+0x12/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
wg_ratelimiter_gc_entries+0x60/0x470 drivers/net/wireguard/ratelimiter.c:63
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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
</TASK>