INFO: task syz-executor:8793 blocked for more than 143 seconds.
Not tainted 6.15.0-rc1-next-20250408-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20968 pid:8793 tgid:8793 ppid:1 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+0x805/0x10c0 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_put_super+0xb8f/0x1130 fs/f2fs/super.c:1707
generic_shutdown_super+0x139/0x2d0 fs/super.c:643
kill_block_super+0x44/0x90 fs/super.c:1760
kill_f2fs_super+0x37f/0x6d0 fs/f2fs/super.c:5032
deactivate_locked_super+0xc4/0x130 fs/super.c:474
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f780618e497
RSP: 002b:00007ffed3be4fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f780620e08c RCX: 00007f780618e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffed3be5060
RBP: 00007ffed3be5060 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffed3be60f0
R13: 00007f780620e08c R14: 000000000003e5fa R15: 00007ffed3be6130
INFO: task syz-executor:8959 blocked for more than 144 seconds.
Not tainted 6.15.0-rc1-next-20250408-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21888 pid:8959 tgid:8959 ppid:1 task_flags:0x400140 flags:0x00000004
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+0x805/0x10c0 kernel/locking/mutex.c:746
del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
kernfs_fop_write_iter+0x398/0x510 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:591 [inline]
vfs_write+0x70f/0xd10 fs/read_write.c:684
ksys_write+0x19d/0x2d0 fs/read_write.c:736
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: 0033:0x7f55d1f8bc1f
RSP: 002b:00007ffc03ef71e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f55d1f8bc1f
RDX: 0000000000000001 RSI: 00007ffc03ef7230 RDI: 0000000000000005
RBP: 00007f55d200f4fd R08: 0000000000000000 R09: 00007ffc03ef7037
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffc03ef7230 R14: 00007f55d2cd4620 R15: 0000000000000003
Showing all locks held in the system:
5 locks held by kworker/0:0/9:
2 locks held by kworker/0:1/10:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3d200 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3d200 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3d200 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
6 locks held by kworker/u8:5/1152:
#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: ffffc90003a2fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003a2fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff900f37d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17c/0xd60 net/core/net_namespace.c:608
#3: ffff88805bcf40e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff88805bcf40e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88805bcf40e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x13d/0x450 net/devlink/core.c:506
#4: ffff88805bcf5250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff88805bcf5250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff88805bcf5250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x14f/0x450 net/devlink/core.c:506
#5: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
3 locks held by kworker/0:2/1206:
2 locks held by getty/5585:
#0: ffff888030ece0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000334b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/5831:
#0: ffffffff8f480f48 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f480f48 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42d/0x650 block/bio.c:1664
#1: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by kworker/0:5/5886:
3 locks held by kworker/0:6/5914:
2 locks held by kworker/0:7/5916:
1 lock held by syz-executor/8670:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.1.1009/8723:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz-executor/8793:
#0: ffff88807df8e0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88807df8e0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88807df8e0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
#1: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.0.1031/8800:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.6.1032/8807:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz-executor/8850:
#0: ffff88802823a0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88802823a0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88802823a0e0 (&type->s_umount_key#72){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
#1: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
5 locks held by kworker/0:8/8938:
7 locks held by syz-executor/8950:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880333c3088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
#4: ffff88807ec690e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff88807ec690e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88807ec690e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff88807ec6a250 (&devlink->lock_key#3){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
4 locks held by syz-executor/8959:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888037a1fc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfe/0x490 drivers/net/netdevsim/bus.c:216
3 locks held by kworker/u8:11/8990:
#0: ffff8880b8739b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffff8880b8723b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x24c/0x10f0 kernel/time/timer.c:1127
2 locks held by kworker/0:9/9043:
2 locks held by kworker/0:10/9044:
4 locks held by syz-executor/9107:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888082f59888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9114:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804f351488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9136:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88805f61ec88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9149:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804227c488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9158:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804d665c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9170:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804a056888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9181:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888056ac9488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9196:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88809465c888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9206:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88809340f888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9218:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888082ff0c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9234:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804aa68888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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/9245:
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803001a428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880a2da8488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888144b13a58 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x206/0x510 fs/kernfs/file.c:326
#3: ffffffff8f999a48 (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 6.15.0-rc1-next-20250408-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+0x1058/0x10a0 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: 5914 Comm: kworker/0:6 Not tainted 6.15.0-rc1-next-20250408-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:211 [inline]
RIP: 0010:unwind_next_frame+0x218/0x23b0 arch/x86/kernel/unwind_orc.c:494
Code: 81 4c 89 e5 48 29 c5 48 c1 ed 08 48 c7 c0 94 76 93 91 48 c7 c1 28 4f c0 91 48 29 c1 48 c1 e9 02 45 31 f6 80 3d b8 1d 0c 0d 00 <44> 0f 45 f1 41 8d 46 ff 39 e8 0f 86 1d 19 00 00 89 e8 48 8d 1c 85
RSP: 0018:ffffc90000006c48 EFLAGS: 00000202
RAX: ffffffff91937694 RBX: ffffc90000006d68 RCX: 00000000000b3625
RDX: 0000000000000000 RSI: ffffffff8ca1e4e0 RDI: ffffffff8ca1e4a0
RBP: 00000000000029fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8129fc19
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff816e1238
FS: 0000000000000000(0000) GS:ffff888124f89000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3051bff8 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2389 [inline]
slab_free mm/slub.c:4646 [inline]
kmem_cache_free+0x197/0x410 mm/slub.c:4748
nft_synproxy_eval_v4+0x3d4/0x610 net/netfilter/nft_synproxy.c:60
nft_synproxy_do_eval+0x36a/0xa90 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x4b2/0x1db0 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x41f/0x6b0 net/netfilter/nft_chain_filter.c:161
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
NF_HOOK+0x3a0/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5885 [inline]
__netif_receive_skb+0x2c9/0x670 net/core/dev.c:5998
process_backlog+0x664/0x15c0 net/core/dev.c:6350
__napi_poll+0xcb/0x480 net/core/dev.c:7322
napi_poll net/core/dev.c:7386 [inline]
net_rx_action+0x89d/0x1240 net/core/dev.c:7508
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
spin_unlock_bh include/linux/spinlock.h:396 [inline]
ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
wg_packet_decrypt_worker+0xce0/0xd80 drivers/net/wireguard/receive.c:499
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