INFO: task syz.4.91:6202 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.4.91 state:D stack:24920 pid:6202 tgid:6201 ppid:5842 task_flags:0x400140 flags:0x00004004
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
kthread_flush_worker+0x146/0x1b0 kernel/kthread.c:1563
drm_vblank_flush_worker drivers/gpu/drm/drm_internal.h:109 [inline]
drm_crtc_vblank_off+0x74e/0x9c0 drivers/gpu/drm/drm_vblank.c:1401
disable_outputs drivers/gpu/drm/drm_atomic_helper.c:1252 [inline]
drm_atomic_helper_commit_modeset_disables+0xd18/0x1a70 drivers/gpu/drm/drm_atomic_helper.c:1456
vkms_atomic_commit_tail+0x50/0x200 drivers/gpu/drm/vkms/vkms_drv.c:63
commit_tail+0x2ac/0x3d0 drivers/gpu/drm/drm_atomic_helper.c:1871
drm_atomic_helper_commit+0x95d/0xa00 drivers/gpu/drm/drm_atomic_helper.c:2111
drm_atomic_commit+0x296/0x2f0 drivers/gpu/drm/drm_atomic.c:1518
drm_atomic_helper_set_config+0xe5/0x160 drivers/gpu/drm/drm_atomic_helper.c:3311
drm_mode_setcrtc+0xc98/0x1dc0 drivers/gpu/drm/drm_crtc.c:869
drm_ioctl_kernel+0x34e/0x450 drivers/gpu/drm/drm_ioctl.c:796
drm_ioctl+0x697/0xbb0 drivers/gpu/drm/drm_ioctl.c:893
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
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: 0033:0x7f66ae18d169
RSP: 002b:00007f66af0ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f66ae3a5fa0 RCX: 00007f66ae18d169
RDX: 00002000000002c0 RSI: 00000000c06864a2 RDI: 0000000000000003
RBP: 00007f66ae20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f66ae3a5fa0 R15: 00007ffe07f7f1e8
Showing all locks held in the system:
2 locks held by kworker/0:0/9:
2 locks held by kworker/u8:0/12:
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
6 locks held by kworker/u8:3/53:
#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: ffffc90000be7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000be7c60 (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: ffff88805c1160e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff88805c1160e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88805c1160e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x13d/0x450 net/devlink/core.c:506
#4: ffff88805c117250 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff88805c117250 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff88805c117250 (&devlink->lock_key#2){+.+.}-{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
3 locks held by kworker/0:2/59:
2 locks held by getty/5594:
#0: ffff888035c220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036e32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5839:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz-executor/5840:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by kworker/0:3/5843:
6 locks held by kworker/0:4/5896:
4 locks held by kworker/0:8/6121:
2 locks held by syz.4.91/6202:
#0: ffffc9000b7a7b20 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_mode_setcrtc+0x5a3/0x1dc0 drivers/gpu/drm/drm_crtc.c:730
#1: ffffc9000b7a7b48 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_mode_setcrtc+0x5a3/0x1dc0 drivers/gpu/drm/drm_crtc.c:730
1 lock held by syz.5.114/6300:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
7 locks held by syz-executor/6353:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88805bfb0888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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: ffff888142bad0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff888142bad0e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff888142bad0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff888142bac250 (&devlink->lock_key#4){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.9.147/6447:
#0: ffff888142f2a518 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_modeset_lock+0x6f/0x90 drivers/gpu/drm/drm_modeset_lock.c:398
1 lock held by syz.6.151/6462:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
4 locks held by syz-executor/6527:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88805482c488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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/6533:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88804115e888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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
1 lock held by syz.8.181/6547:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
1 lock held by syz.7.183/6555:
#0: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
4 locks held by syz-executor/6566:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88803fed1488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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/6570:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888066218c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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/6585:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888076e40088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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/6604:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff88808f5bec88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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/6616:
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888032ab6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
#1: ffff888029dd1c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ef/0x510 fs/kernfs/file.c:325
#2: ffff888027bdae18 (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
1 lock held by syz-executor/6629:
#0: ffffffff900efd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff900efd08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x406/0x1c40 net/ipv4/devinet.c:979
1 lock held by syz-executor/6634:
#0: ffffffff900efd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff900efd08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x406/0x1c40 net/ipv4/devinet.c:979
=============================================
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: 5896 Comm: kworker/0:4 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-kex-wg1 wg_packet_handshake_receive_worker
RIP: 0010:unwind_next_frame+0x18dc/0x23b0 arch/x86/kernel/unwind_orc.c:664
Code: 00 00 00 00 00 fc ff df 48 8b 44 24 28 42 0f b6 04 28 84 c0 0f 85 43 08 00 00 40 b5 01 48 8b 1c 24 8b 84 24 94 00 00 00 39 03 <4c> 8b 7c 24 48 0f 85 66 01 00 00 48 8b 44 24 50 42 80 3c 28 00 74
RSP: 0018:ffffc90000006b88 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffc90000006c60 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc90000000000 RDI: ffffc90000007fe8
RBP: dffffc0000000001 R08: ffffc90000007fe8 R09: 0000000000000000
R10: ffffc90000006cb0 R11: fffff52000000d98 R12: ffffc90000006c60
R13: dffffc0000000000 R14: ffffffff90ea6df2 R15: ffffffff90ea6df1
FS: 0000000000000000(0000) GS:ffff888124fb9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3a4405000 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
skb_kfree_head net/core/skbuff.c:1056 [inline]
skb_free_head net/core/skbuff.c:1070 [inline]
skb_release_data+0x67a/0x8b0 net/core/skbuff.c:1097
skb_release_all net/core/skbuff.c:1162 [inline]
__kfree_skb net/core/skbuff.c:1176 [inline]
consume_skb+0x9f/0xf0 net/core/skbuff.c:1408
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: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]
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:49
blake2s_final+0x114/0x260 lib/crypto/blake2s.c:54
hmac+0x674/0x9d0 drivers/net/wireguard/noise.c:333
kdf drivers/net/wireguard/noise.c:367 [inline]
mix_dh drivers/net/wireguard/noise.c:413 [inline]
wg_noise_handshake_create_response+0x4ff/0xe90 drivers/net/wireguard/noise.c:702
wg_packet_send_handshake_response+0xfb/0x2e0 drivers/net/wireguard/send.c:94
wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline]
wg_packet_handshake_receive_worker+0x5e8/0xf60 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