INFO: task syz-executor:5832 blocked for more than 143 seconds.
Not tainted 6.15.0-rc1-next-20250408-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20528 pid:5832 tgid:5832 ppid:1 task_flags:0x40054c 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
netdev_run_todo+0x380/0xf30 net/core/dev.c:11279
tun_detach drivers/net/tun.c:639 [inline]
tun_chr_close+0x137/0x1b0 drivers/net/tun.c:3390
__fput+0x3e9/0x9f0 fs/file_table.c:465
task_work_run+0x251/0x310 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x754/0x2520 kernel/exit.c:949
do_group_exit+0x207/0x2c0 kernel/exit.c:1098
get_signal+0x1696/0x1730 kernel/signal.c:3034
arch_do_signal_or_restart+0x98/0x840 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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/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: 0033:0x7f01bb18e497
RSP: 002b:00007ffda8b7a3c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f01bb20e08c RCX: 00007f01bb18e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffda8b7a480
RBP: 00007ffda8b7a480 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffda8b7b510
R13: 00007f01bb20e08c R14: 000000000002d9f8 R15: 00007ffda8b7b550
INFO: task syz.5.786:8226 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.5.786 state:D stack:26728 pid:8226 tgid:8226 ppid:7953 task_flags:0x400040 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
kvm_mmu_uninit_vm+0x2f/0x60 arch/x86/kvm/mmu/mmu.c:6705
kvm_arch_destroy_vm+0x239/0x280 arch/x86/kvm/x86.c:12900
kvm_destroy_vm virt/kvm/kvm_main.c:1310 [inline]
kvm_put_kvm+0xb67/0xf50 virt/kvm/kvm_main.c:1346
kvm_vm_release+0x43/0x50 virt/kvm/kvm_main.c:1369
__fput+0x3e9/0x9f0 fs/file_table.c:465
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: 0033:0x7f7744d8d169
RSP: 002b:00007fff3e20b248 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000038042 RCX: 00007f7744d8d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f7744fa7ba0 R08: 0000000000000001 R09: 000000033e20b53f
R10: 00007f7744c00000 R11: 0000000000000246 R12: 00007f7744fa5fac
R13: 00007f7744fa5fa0 R14: ffffffffffffffff R15: 00007fff3e20b360
INFO: task syz.1.811:8282 blocked for more than 145 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.1.811 state:D stack:25000 pid:8282 tgid:8280 ppid:5838 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_fill_super+0x53e6/0x6c80 fs/f2fs/super.c:4959
mount_bdev+0x20c/0x2d0 fs/super.c:1743
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2b0 fs/super.c:1809
do_new_mount+0x2cf/0xb70 fs/namespace.c:3879
do_mount fs/namespace.c:4219 [inline]
__do_sys_mount fs/namespace.c:4430 [inline]
__se_sys_mount+0x38c/0x400 fs/namespace.c:4407
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: 0033:0x7f467a78e90a
RSP: 002b:00007f467b635e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f467b635ef0 RCX: 00007f467a78e90a
RDX: 0000200000000140 RSI: 0000200000000100 RDI: 00007f467b635eb0
RBP: 0000200000000140 R08: 00007f467b635ef0 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000200000000100
R13: 00007f467b635eb0 R14: 0000000000005505 R15: 0000200000000180
INFO: task syz.2.819:8305 blocked for more than 145 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.2.819 state:D stack:26120 pid:8305 tgid:8305 ppid:5834 task_flags:0x400040 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
kvm_mmu_uninit_vm+0x2f/0x60 arch/x86/kvm/mmu/mmu.c:6705
kvm_arch_destroy_vm+0x239/0x280 arch/x86/kvm/x86.c:12900
kvm_destroy_vm virt/kvm/kvm_main.c:1310 [inline]
kvm_put_kvm+0xb67/0xf50 virt/kvm/kvm_main.c:1346
kvm_vm_release+0x43/0x50 virt/kvm/kvm_main.c:1369
__fput+0x3e9/0x9f0 fs/file_table.c:465
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: 0033:0x7fd63258d169
RSP: 002b:00007ffccadeb5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000003a0c4 RCX: 00007fd63258d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd6327a7ba0 R08: 0000000000000001 R09: 00000003cadeb8df
R10: 00007fd632200000 R11: 0000000000000246 R12: 00007fd6327a5fac
R13: 00007fd6327a5fa0 R14: ffffffffffffffff R15: 00007ffccadeb700
Showing all locks held in the system:
1 lock held by kworker/R-mm_pe/14:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529
2 locks held by kworker/1:0/24:
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
4 locks held by kworker/u8:2/36:
#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: ffffc90000ad7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000ad7c60 (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: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
3 locks held by kworker/1:1/47:
2 locks held by kworker/1:2/883:
1 lock held by kworker/R-dm_bu/2815:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
3 locks held by kworker/u8:9/5136:
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000f5e7c60 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000f5e7c60 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by getty/5586:
#0: ffff88814d8210a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by kworker/1:3/5826:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by syz-executor/5832:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
6 locks held by kworker/1:4/5842:
1 lock held by syz-executor/5848:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by kworker/R-wg-cr/5872:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5873:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5874:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5875:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5877:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5878:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5879:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5880:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529
1 lock held by kworker/R-wg-cr/5881:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5882:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5884:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5885:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
2 locks held by kworker/1:6/5925:
2 locks held by kworker/1:8/7804:
1 lock held by syz.0.684/7925:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by kworker/R-wg-cr/7981:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/7982:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8156:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529
1 lock held by kworker/R-wg-cr/8157:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by syz.5.786/8226:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz.1.811/8282:
#0: ffff88802ff660e0 (&type->s_umount_key#78/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:345
#1: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.2.819/8305:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by kworker/R-wg-cr/8376:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8377:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8378:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
2 locks held by kworker/1:9/8428:
1 lock held by syz-executor/8436:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by kworker/R-wg-cr/8444:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8448:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529
1 lock held by kworker/R-wg-cr/8450:
2 locks held by kworker/1:10/8467:
1 lock held by kworker/R-wg-cr/8509:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8512:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/8514:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529
3 locks held by kworker/1:12/8628:
2 locks held by kworker/1:13/8656:
2 locks held by kworker/1:14/8746:
1 lock held by syz.6.969/8762:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
7 locks held by syz-executor/8822:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88803a983c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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: ffff88807d0290e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff88807d0290e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88807d0290e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff88807d02a250 (&devlink->lock_key#2){+.+.}-{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
1 lock held by syz.8.1014/8904:
#0: ffffffff8ed42600 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
4 locks held by syz-executor/8906:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880562f2088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/8953:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888081e0b488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/8978:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888086afec88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/8989:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804d68bc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/9001:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888082ef5888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/9012:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880840df088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/9027:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff8880947d1888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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/9041:
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3045 [inline]
#0: ffff88803604e428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888082ef4088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e2/0x510 fs/kernfs/file.c:325
#2: ffff888142bffa58 (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
1 lock held by kworker/R-wg-cr/9050:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3325 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xd2/0x1020 kernel/workqueue.c:3452
1 lock held by kworker/R-wg-cr/9051:
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3325 [inline]
#0: ffffffff8ebe4108 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xd2/0x1020 kernel/workqueue.c:3452
=============================================
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8628 Comm: kworker/1:12 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-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x5a/0xb0 kernel/rcu/tree.c:736
Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2c c6 84 00 48 c7 c3 58 9b 6a 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 22 8b 03 65 ff 0d 59 cc c0 11 74 10 83 e0 04 c1 e8 02 5b
RSP: 0018:ffffc90000a076a8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff8880b8732b58 RCX: ffff88801e76bc00
RDX: 0000000000000000 RSI: ffffffff8ca1e4e0 RDI: ffffffff8ca1e4a0
RBP: ffffc90000a077d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000a077a0
R13: dffffc0000000000 R14: ffffffff8e7a2c68 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125089000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3070dff8 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock include/linux/rcupdate.h:842 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xe7/0x23b0 arch/x86/kernel/unwind_orc.c:479
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
dst_alloc+0x12b/0x190 net/core/dst.c:89
rt_dst_alloc net/ipv4/route.c:1638 [inline]
__mkroute_output net/ipv4/route.c:2632 [inline]
ip_route_output_key_hash_rcu+0x1378/0x2290 net/ipv4/route.c:2854
ip_route_output_key_hash+0x195/0x2b0 net/ipv4/route.c:2683
__ip_route_output_key include/net/route.h:169 [inline]
ip_route_output_flow+0x29/0x140 net/ipv4/route.c:2911
ip_route_output_key include/net/route.h:179 [inline]
ip_route_me_harder+0x852/0x13e0 net/ipv4/netfilter.c:53
synproxy_send_tcp+0x356/0x6c0 net/netfilter/nf_synproxy_core.c:431
synproxy_send_client_synack+0x8ea/0xf70 net/netfilter/nf_synproxy_core.c:484
nft_synproxy_eval_v4+0x3cc/0x610 net/netfilter/nft_synproxy.c:59
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
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
kernel_fpu_end+0x103/0x150 arch/x86/kernel/fpu/core.c:460
blake2s_compress+0x5f/0xd0 arch/x86/crypto/blake2s-glue.c:48
blake2s_update+0x135/0x420 lib/crypto/blake2s.c:32
hmac+0x669/0x9d0 drivers/net/wireguard/noise.c:332
kdf+0xea/0x3a0 drivers/net/wireguard/noise.c:360
mix_dh drivers/net/wireguard/noise.c:413 [inline]
wg_noise_handshake_consume_initiation+0x24c/0xd60 drivers/net/wireguard/noise.c:608
wg_receive_handshake_packet drivers/net/wireguard/receive.c:144 [inline]
wg_packet_handshake_receive_worker+0x5bd/0xf60 drivers/net/wireguard/receive.c:213
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