INFO: task syz.0.17:6436 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:27984 pid:6436 ppid:6310 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
rwsem_down_read_slowpath+0x4f8/0x840 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:814 [inline]
open_last_lookups fs/namei.c:3555 [inline]
path_openat+0x7b7/0x3190 fs/namei.c:3786
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_open_execat+0x133/0x3d0 fs/exec.c:924
bprm_execve+0x567/0x16f0 fs/exec.c:1867
do_execveat_common+0x51b/0x6c0 fs/exec.c:1998
do_execveat fs/exec.c:2083 [inline]
__do_sys_execveat fs/exec.c:2157 [inline]
__se_sys_execveat fs/exec.c:2151 [inline]
__x64_sys_execveat+0xc4/0xe0 fs/exec.c:2151
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9d9a18eba9
RSP: 002b:00007f9d997dd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00007f9d9a3d6090 RCX: 00007f9d9a18eba9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f9d9a211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9d9a3d6128 R14: 00007f9d9a3d6090 R15: 00007ffcec1e7ac8
INFO: task syz.1.18:6438 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18 state:D stack:28072 pid:6438 ppid:6314 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
rwsem_down_read_slowpath+0x4f8/0x840 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:814 [inline]
open_last_lookups fs/namei.c:3555 [inline]
path_openat+0x7b7/0x3190 fs/namei.c:3786
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_open_execat+0x133/0x3d0 fs/exec.c:924
bprm_execve+0x567/0x16f0 fs/exec.c:1867
do_execveat_common+0x51b/0x6c0 fs/exec.c:1998
do_execveat fs/exec.c:2083 [inline]
__do_sys_execveat fs/exec.c:2157 [inline]
__se_sys_execveat fs/exec.c:2151 [inline]
__x64_sys_execveat+0xc4/0xe0 fs/exec.c:2151
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc233f8eba9
RSP: 002b:00007fc234e21038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00007fc2341d6090 RCX: 00007fc233f8eba9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007fc234011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc2341d6128 R14: 00007fc2341d6090 R15: 00007ffc7b287798
Showing all locks held in the system:
2 locks held by kworker/u4:1/12:
#0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc90000117d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90000117d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
1 lock held by khungtaskd/29:
#0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by kworker/u4:3/48:
#0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc90000b97d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90000b97d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
1 lock held by kswapd0/85:
2 locks held by udevd/5156:
2 locks held by getty/5543:
#0: ffff88823bcce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
2 locks held by syz.0.17/6430:
2 locks held by syz.0.17/6436:
#0: ffff88802c3df808 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88802c3df808 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cda0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cda0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cda0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
2 locks held by syz.1.18/6432:
2 locks held by syz.1.18/6438:
#0: ffff88802c3dea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88802c3dea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff0198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by syz.3.20/6531:
2 locks held by syz.3.20/6538:
#0: ffff88807e61ea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88807e61ea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
2 locks held by syz.2.19/6536:
2 locks held by syz.2.19/6539:
#0: ffff88802240b488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88802240b488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by syz.5.22/6819:
2 locks held by syz.5.22/6820:
#0: ffff888018f6ea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff888018f6ea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff1170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff1170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff1170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by syz.4.21/6828:
2 locks held by syz.4.21/6834:
#0: ffff88802a2dd648 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88802a2dd648 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff16b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff16b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff16b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by syz.6.23/6858:
2 locks held by syz.6.23/6862:
#0: ffff8880278cea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff8880278cea88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff1c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff1c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff1c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by syz.7.24/6860:
2 locks held by syz.7.24/6863:
#0: ffff888024d9cf88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff888024d9cf88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cda06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cda06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cda06e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
2 locks held by syz.8.25/6945:
2 locks held by syz.8.25/6946:
#0: ffff888024d9b488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff888024d9b488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cda0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cda0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cda0c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
2 locks held by syz.9.26/6960:
2 locks held by syz.9.26/6962:
#0: ffff88802c80e3c8 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline]
#0: ffff88802c80e3c8 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854
#1: ffff88805cff2148 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#1: ffff88805cff2148 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff88805cff2148 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786
1 lock held by udevd/6970:
1 lock held by syz.2.212/7749:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:94 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:108 [inline]
RIP: 0010:lock_is_held_type+0x6c/0x190 kernel/locking/lockdep.c:5821
Code: 48 8b 1d 67 6b 95 75 83 bb dc 0a 00 00 00 0f 85 df 00 00 00 41 89 f7 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 2c 24 48 c7 c7 80 c9 aa 8a e8 47 13 00 00 65 ff 05 58 3d 94 75 83 bb
RSP: 0018:ffffc900000d79f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801a645a00 RCX: ffff88801a645a00
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8cd2fe80
RBP: 00000000ffffffff R08: ffffffff8d7663e3 R09: 1ffffffff1aecc7c
R10: dffffc0000000000 R11: fffffbfff1aecc7d R12: ffff88805b720d88
R13: 0000000000000246 R14: ffffffff8cd2fe80 R15: 00000000ffffffff
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb9c900e000 CR3: 000000000cb30000 CR4: 00000000003506f0
Call Trace:
lock_is_held include/linux/lockdep.h:288 [inline]
__might_resched+0xa7/0x610 kernel/sched/core.c:10170
wg_ratelimiter_gc_entries+0x3a6/0x450 drivers/net/wireguard/ratelimiter.c:78