INFO: task syz.2.1029:8862 blocked for more than 144 seconds.
Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1029 state:D stack:27392 pid:8862 tgid:8861 ppid:5831 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
chrdev_open+0x523/0x600 fs/char_dev.c:414
do_dentry_open+0xdee/0x1960 fs/open.c:956
vfs_open+0x3b/0x370 fs/open.c:1086
do_open fs/namei.c:3830 [inline]
path_openat+0x2c81/0x3590 fs/namei.c:3989
do_filp_open+0x27f/0x4e0 fs/namei.c:4016
do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4937d8b750
RSP: 002b:00007f4938c08b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f4937d8b750
RDX: 0000000000000002 RSI: 00007f4938c08c10 RDI: 00000000ffffff9c
RBP: 00007f4938c08c10 R08: 0000000000000000 R09: 00007f4938c08987
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4937fa5fa0 R15: 00007ffdb27306f8
INFO: task syz.5.1044:8905 blocked for more than 144 seconds.
Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1044 state:D stack:27392 pid:8905 tgid:8904 ppid:5835 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
ptmx_open+0xd9/0x2d0 drivers/tty/pty.c:823
chrdev_open+0x523/0x600 fs/char_dev.c:414
do_dentry_open+0xdee/0x1960 fs/open.c:956
vfs_open+0x3b/0x370 fs/open.c:1086
do_open fs/namei.c:3830 [inline]
path_openat+0x2c81/0x3590 fs/namei.c:3989
do_filp_open+0x27f/0x4e0 fs/namei.c:4016
do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78b7b8cde9
RSP: 002b:00007f78b892d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f78b7da5fa0 RCX: 00007f78b7b8cde9
RDX: 0000000000161000 RSI: 00004000000009c0 RDI: ffffffffffffff9c
RBP: 00007f78b7c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f78b7da5fa0 R15: 00007ffec82a3dd8
Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:2/35:
3 locks held by kworker/u8:3/52:
3 locks held by kworker/u9:0/54:
#0: ffff88807b122148 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88807b122148 ((wq_completion)hci7){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
#1: ffffc90000bf7c60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc90000bf7c60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
#2: ffff888030764d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331
4 locks held by kworker/u8:4/62:
3 locks held by kworker/u8:5/252:
2 locks held by kworker/1:2/872:
3 locks held by kworker/u8:6/1154:
3 locks held by kworker/u8:7/2911:
3 locks held by kworker/u8:9/3023:
2 locks held by getty/5590:
#0: ffff888030a120a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by kworker/u9:2/5840:
3 locks held by kworker/u9:9/5854:
3 locks held by kworker/0:4/5894:
2 locks held by syz.3.1022/8847:
1 lock held by syz.2.1029/8862:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
1 lock held by syz.5.1044/8905:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: ptmx_open+0xd9/0x2d0 drivers/tty/pty.c:823
7 locks held by kworker/1:8/9003:
1 lock held by syz.1.1097/9071:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
1 lock held by syz.7.1133/9177:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: ptmx_open+0xd9/0x2d0 drivers/tty/pty.c:823
2 locks held by syz-executor/9257:
#0: ffffffff8f062e28 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f062e28 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42f/0x650 block/bio.c:1662
#1: ffffffff8e93db80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
1 lock held by syz.8.1208/9460:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
1 lock held by syz.6.1235/9609:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
1 lock held by syz.3.1270/9816:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
1 lock held by syz.2.1275/9879:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: ptmx_open+0xd9/0x2d0 drivers/tty/pty.c:823
1 lock held by syz.5.1284/9983:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: ptmx_open+0xd9/0x2d0 drivers/tty/pty.c:823
1 lock held by syz-executor/10002:
1 lock held by syz.1.1261/10028:
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
#0: ffffffff8f16e288 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x232/0xde0 drivers/tty/tty_io.c:2129
7 locks held by syz-executor/10031:
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
#1: ffff888058231088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff88802761e878 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f56fe68 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff88804487c0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#4: ffff88804487c0e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88804487c0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff88804487d250 (&devlink->lock_key#10){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8e93db80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
4 locks held by syz-executor/10036:
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
#1: ffff88808786f888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff88802761e878 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f56fe68 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/10061:
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
#0: ffff88807cdd4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
#1: ffff88808dd10c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff88802761e878 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f56fe68 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
3 locks held by syz.0.1296/10089:
2 locks held by syz.0.1299/10096:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9003 Comm: kworker/1:8 Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg2 wg_packet_encrypt_worker
RIP: 0010:unwind_next_frame+0x18ed/0x22d0 arch/x86/kernel/unwind_orc.c:672
Code: 0c 01 75 40 80 3d b2 55 b4 11 00 75 37 c6 05 a9 55 b4 11 01 e9 21 fa ff ff bf 01 00 00 00 e8 4a c1 21 00 65 8b 0d 5b 1a 98 7e 01 85 c9 75 73 e8 d8 7b be ff eb 6c 80 3d e0 b3 99 0e 00 0f 84
RSP: 0018:ffffc90000a17a50 EFLAGS: 00000293
RAX: 0000000080000102 RBX: ffffc90000a17b30 RCX: 0000000080000101
RDX: dffffc0000000000 RSI: ffffc90004770000 RDI: 0000000000000001
RBP: ffffc90000a17b20 R08: ffffc90004777d20 R09: ffffc90000a17b70
R10: dffffc0000000000 R11: fffff52000142f70 R12: dffffc0000000000
R13: ffffc90000a17b20 R14: ffffc90004770000 R15: ffffc90004777d30
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff24a842d48 CR3: 0000000086b82000 CR4: 0000000000350ef0
Call Trace:
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 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:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4216
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1331 [inline]
synproxy_send_client_synack+0x1b9/0xe20 net/netfilter/nf_synproxy_core.c:460
nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
nft_do_chain+0x4af/0x1da0 net/netfilter/nf_tables_core.c:288
nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
NF_HOOK+0x3a6/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5828 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5941
process_backlog+0x662/0x15b0 net/core/dev.c:6289
__napi_poll+0xcd/0x490 net/core/dev.c:7106
napi_poll net/core/dev.c:7175 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:7297
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
do_softirq+0x11b/0x1e0 kernel/softirq.c:462
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389
spin_unlock_bh include/linux/spinlock.h:396 [inline]
ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
wg_packet_encrypt_worker+0x2c4/0x16b0 drivers/net/wireguard/send.c:293
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244