INFO: task syz.6.276:6689 blocked for more than 143 seconds.
Not tainted 6.14.0-next-20250328-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.276 state:D stack:24840 pid:6689 tgid:6688 ppid:6537 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x848/0x1150 kernel/locking/mutex.c:746
rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
flush_rcu_work+0x84/0xb0 kernel/workqueue.c:4302
kvfree_rcu_barrier+0x131/0x160 mm/slab_common.c:2083
kmem_cache_destroy+0x2e/0x160 mm/slab_common.c:492
f2fs_fill_super+0x53e6/0x6c80 fs/f2fs/super.c:4959
mount_bdev+0x20c/0x2d0 fs/super.c:1693
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2b0 fs/super.c:1759
do_new_mount+0x2cf/0xb70 fs/namespace.c:3878
do_mount fs/namespace.c:4218 [inline]
__do_sys_mount fs/namespace.c:4429 [inline]
__se_sys_mount+0x38c/0x400 fs/namespace.c:4406
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe16f58e90a
RSP: 002b:00007fe17042fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe17042fef0 RCX: 00007fe16f58e90a
RDX: 0000200000000040 RSI: 0000200000000000 RDI: 00007fe17042feb0
RBP: 0000200000000040 R08: 00007fe17042fef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007fe17042feb0 R14: 000000000000553d R15: 0000200000000300
INFO: task syz.6.276:6689 is blocked on a mutex likely owned by task syz.4.253:6593.
task:syz.4.253 state:D stack:23320 pid:6593 tgid:6592 ppid:5851 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
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+0x32f/0x600 kernel/sched/completion.c:148
rcu_barrier+0x41d/0x530 kernel/rcu/tree.c:3842
flush_rcu_work+0x84/0xb0 kernel/workqueue.c:4302
kvfree_rcu_barrier+0x131/0x160 mm/slab_common.c:2083
kmem_cache_destroy+0x2e/0x160 mm/slab_common.c:492
bio_put_slab block/bio.c:155 [inline]
bioset_exit+0x54c/0x650 block/bio.c:1664
bch2_fs_fs_io_direct_exit+0x19/0x30 fs/bcachefs/fs-io-direct.c:684
__bch2_fs_free fs/bcachefs/super.c:555 [inline]
bch2_fs_release+0x1c3/0x7d0 fs/bcachefs/super.c:621
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x22f/0x480 lib/kobject.c:737
deactivate_locked_super+0xc4/0x130 fs/super.c:473
bch2_fs_get_tree+0xd41/0x18d0 fs/bcachefs/fs.c:2294
vfs_get_tree+0x90/0x2b0 fs/super.c:1759
do_new_mount+0x2cf/0xb70 fs/namespace.c:3878
do_mount fs/namespace.c:4218 [inline]
__do_sys_mount fs/namespace.c:4429 [inline]
__se_sys_mount+0x38c/0x400 fs/namespace.c:4406
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f17f1d8e90a
RSP: 002b:00007f17f2bd1e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f17f2bd1ef0 RCX: 00007f17f1d8e90a
RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007f17f2bd1eb0
RBP: 0000200000000080 R08: 00007f17f2bd1ef0 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f17f2bd1eb0 R14: 0000000000005962 R15: 0000200000000380
Showing all locks held in the system:
3 locks held by kworker/0:0/9:
4 locks held by kworker/0:1/10:
4 locks held by kworker/u8:1/13:
#0: ffff88804db61148 ((wq_completion)wg-kex-wg2#19){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88804db61148 ((wq_completion)wg-kex-wg2#19){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc90000127c60 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000127c60 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff88805bfc1308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x112/0xcb0 drivers/net/wireguard/noise.c:529
#3: ffff88804b5fb4c0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x121/0xcb0 drivers/net/wireguard/noise.c:530
6 locks held by kworker/1:0/24:
#0: ffff8880222dc548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff8880222dc548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc900001e7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900001e7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff888028998198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#2: ffff888028998198 (&dev->mutex){....}-{4:4}, at: hub_event+0x200/0x50f0 drivers/usb/core/hub.c:5859
#3: ffff88802a43e198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff88802a43e198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x90/0x530 drivers/base/dd.c:1005
#4: ffff8880589e0160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff8880589e0160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x90/0x530 drivers/base/dd.c:1005
#5: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by khungtaskd/31:
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
4 locks held by kworker/1:2/60:
#0: ffff888036496148 ((wq_completion)wg-kex-wg2#20){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff888036496148 ((wq_completion)wg-kex-wg2#20){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000136fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000136fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff88805bfc1308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x151/0xd60 drivers/net/wireguard/noise.c:598
#3: ffff88804b5fb4c0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x711/0xd60 drivers/net/wireguard/noise.c:632
6 locks held by kworker/u8:5/84:
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc90001587c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90001587c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff900e30d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17c/0xd60 net/core/net_namespace.c:608
#3: ffff8880611910e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff8880611910e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff8880611910e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x13d/0x450 net/devlink/core.c:506
#4: ffff8880612bf250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff8880612bf250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff8880612bf250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x14f/0x450 net/devlink/core.c:506
#5: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by kworker/0:2/1207:
2 locks held by getty/5590:
#0: ffff8880315740a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
3 locks held by kworker/1:3/5830:
3 locks held by kworker/1:4/5885:
#0: ffff88807ed1bd48 ((wq_completion)wg-kex-wg2#12){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88807ed1bd48 ((wq_completion)wg-kex-wg2#12){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc90003f4fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003f4fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff88805f1d34c0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_begin_session+0x38/0xc00 drivers/net/wireguard/noise.c:822
2 locks held by kworker/0:3/5887:
3 locks held by kworker/0:4/5888:
4 locks held by kworker/1:6/5889:
#0: ffff88805de9bd48 ((wq_completion)wg-kex-wg2#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88805de9bd48 ((wq_completion)wg-kex-wg2#18){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000427fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000427fc60 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff888044e79308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x151/0xd60 drivers/net/wireguard/noise.c:598
#3: ffff88807a4f6648 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x711/0xd60 drivers/net/wireguard/noise.c:632
2 locks held by kworker/0:5/5897:
4 locks held by kworker/0:6/5927:
4 locks held by udevd/6027:
#0: ffff88802faafe80 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xda0 fs/seq_file.c:182
#1: ffff88804b578888 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff88807fac8c38 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff88802a43e198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff88802a43e198 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2730
2 locks held by kworker/0:7/6333:
1 lock held by syz.2.180/6393:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz-executor/6479:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.1.230/6534:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz.4.253/6593:
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42d/0x650 block/bio.c:1664
#1: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz.6.276/6689:
#0: ffff88804d8400e0 (&type->s_umount_key#73/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by kworker/0:9/6697:
3 locks held by kworker/0:10/6705:
1 lock held by syz-executor/6712:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.0.316/6822:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by kworker/0:11/6868:
5 locks held by syz-executor/6929:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880272db088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
#4: ffff8880611910e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff8880611910e8 (&dev->mutex){....}-{4:4}, at: device_del+0xa8/0x9b0 drivers/base/core.c:3817
1 lock held by syz.9.351/6953:
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bio_find_or_create_slab block/bio.c:122 [inline]
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bioset_init+0x241/0x820 block/bio.c:1705
2 locks held by kworker/0:12/6956:
1 lock held by syz.7.356/6969:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
4 locks held by syz-executor/6974:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88803c001488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/6976:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888059d32088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/6991:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88802a2b6888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/7000:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88807a20b888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/7015:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880880de088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
2 locks held by kworker/0:13/7019:
8 locks held by kworker/0:14/7024:
2 locks held by kworker/0:15/7025:
4 locks held by syz-executor/7028:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888052882888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/7030:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88803d4f6488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/7045:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804b951888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/7054:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88808b2ba488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
3 locks held by kworker/0:16/7063:
4 locks held by syz-executor/7065:
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888036084420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88805d0fbc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027ebfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x213/0x510 fs/kernfs/file.c:326
#3: ffffffff8f9976a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x133e/0x1380 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6705 Comm: kworker/0:10 Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
RIP: 0010:lock_release+0x230/0x3e0 kernel/locking/lockdep.c:5890
Code: ff ff ff 65 0f c1 05 cf a3 c7 11 83 f8 01 0f 85 bf 00 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 <0f> 85 c3 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 65 48 8b 03 48 3b
RSP: 0018:ffffc90000006c60 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffff93667020 RCX: 0000000000000005
RDX: dffffc0000000000 RSI: ffffffff8e4efdcb RDI: ffffffff8ca1d660
RBP: ffff8880324f0bc0 R08: ffffc90003e3f9d0 R09: 0000000000000000
R10: ffffc90000006df0 R11: fffff52000000dc0 R12: 0000000000000005
R13: ffff8880324f0000 R14: 0000000000000206 R15: ffffffff8ed3df80
FS: 0000000000000000(0000) GS:ffff888124fb9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d70fef6f4 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x1a9f/0x23b0 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4151 [inline]
slab_alloc_node mm/slub.c:4200 [inline]
kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4207
kmem_alloc_batch lib/debugobjects.c:371 [inline]
fill_pool+0x262/0x690 lib/debugobjects.c:403
debug_objects_fill_pool lib/debugobjects.c:725 [inline]
debug_object_activate+0x4c1/0x5c0 lib/debugobjects.c:814
debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
__call_rcu_common kernel/rcu/tree.c:3067 [inline]
call_rcu+0x99/0xad0 kernel/rcu/tree.c:3202
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4646 [inline]
kmem_cache_free+0x312/0x410 mm/slub.c:4748
nf_conntrack_free+0x2fd/0x390 net/netfilter/nf_conntrack_core.c:1729
nf_ct_put include/net/netfilter/nf_conntrack.h:186 [inline]
nf_conntrack_in+0xb56/0x18c0 net/netfilter/nf_conntrack_core.c:2055
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc8/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29b/0x450 include/linux/netfilter.h:312
__netif_receive_skb_one_core net/core/dev.c:5891 [inline]
__netif_receive_skb+0x2c9/0x670 net/core/dev.c:6004
process_backlog+0x664/0x15c0 net/core/dev.c:6356
__napi_poll+0xcb/0x480 net/core/dev.c:7328
napi_poll net/core/dev.c:7392 [inline]
net_rx_action+0x89d/0x1240 net/core/dev.c:7514
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
do_softirq+0x11f/0x1e0 kernel/softirq.c:480
__local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:407
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:910 [inline]
keep_key_fresh drivers/net/wireguard/send.c:135 [inline]
wg_packet_create_data_done drivers/net/wireguard/send.c:259 [inline]
wg_packet_tx_worker+0x755/0x810 drivers/net/wireguard/send.c:276
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245