INFO: task kworker/u8:6:1101 blocked for more than 149 seconds.
Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:19544 pid:1101 tgid:1101 ppid:2 flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1377
dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:180
__linkwatch_run_queue+0x44f/0x6c0 net/core/link_watch.c:239
linkwatch_event+0x4c/0x60 net/core/link_watch.c:282
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz.9.6650:32520 blocked for more than 156 seconds.
Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.6650 state:D stack:26096 pid:32520 tgid:32518 ppid:31932 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
rtnl_lock net/core/rtnetlink.c:79 [inline]
rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6922
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:726
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
___sys_sendmsg net/socket.c:2637 [inline]
__sys_sendmsg+0x269/0x350 net/socket.c:2669
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: 0033:0x7fa040985d29
RSP: 002b:00007fa0417e5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa040b75fa0 RCX: 00007fa040985d29
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00007fa040a01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa040b75fa0 R15: 00007fa040c9fa28
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:3/52:
3 locks held by kworker/0:2/974:
#0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc90003be7d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003be7d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x99/0xfb0 net/wireless/reg.c:2480
3 locks held by kworker/u8:6/1101:
4 locks held by kworker/u8:7/2925:
6 locks held by kworker/u8:8/2971:
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000bf47d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000bf47d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fca6810 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x16a/0xd50 net/core/net_namespace.c:602
#3: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: caif_exit_net+0x6f/0x4a0 net/caif/caif_dev.c:528
#4: ffff888062ee7880 (&caifn->caifdevs.lock){+.+.}-{4:4}, at: caif_exit_net+0x82/0x4a0 net/caif/caif_dev.c:529
#5: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#5: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by klogd/5196:
4 locks held by udevd/5207:
2 locks held by dhcpcd/5501:
2 locks held by getty/5594:
#0: ffff88814d5a10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/31828:
1 lock held by syz-executor/31924:
#0: ffff88803014c308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_target+0x6d/0x200 net/netfilter/x_tables.c:254
3 locks held by syz.0.6634/32470:
#0: ffff88804a3ecd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline]
#0: ffff88804a3ecd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2697
#1: ffff88804a3ec078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5200
#2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz-executor/32505:
#0: ffffffff8fca6810 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
#1: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x13/0x50 net/core/dev.c:10736
1 lock held by syz.9.6650/32520:
#0: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#0: ffffffff8fcb2cc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
5 locks held by syz-executor/32529:
4 locks held by syz-executor/32535:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5207 Comm: udevd Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0xccc/0x22d0 arch/x86/kernel/unwind_orc.c:590
Code: 00 00 00 fc ff df 48 8b 44 24 30 80 3c 28 00 48 8b 5c 24 18 74 08 48 89 df e8 d0 27 ba 00 4c 89 33 48 8b 44 24 58 80 3c 28 00 <4c> 8b 6c 24 08 48 8b 5c 24 78 4c 8b 7c 24 50 74 08 48 89 df e8 ab
RSP: 0018:ffffc90002fb7250 EFLAGS: 00000246
RAX: 1ffff920005f6e6b RBX: ffffc90002fb7368 RCX: 1ffff920005f6e64
RDX: ffffffff90a38250 RSI: 0000000000000002 RDI: ffffc90002fb7a78
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffc90002fb7410
R10: ffffc90002fb7370 R11: ffffffff818b4a10 R12: ffffc90002fb8000
R13: ffffc90002fb7a78 R14: ffffffff815f63a5 R15: 1ffff920005f6e66
FS: 00007f11faad2c80(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe73b0a56e8 CR3: 00000000337ae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 000000000000000a DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2659
__slab_free+0x2c2/0x380 mm/slub.c:4524
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4175
vm_area_dup+0x27/0x290 kernel/fork.c:487
dup_mmap kernel/fork.c:694 [inline]
dup_mm kernel/fork.c:1691 [inline]
copy_mm+0xb95/0x1fd0 kernel/fork.c:1743
copy_process+0x1845/0x3d50 kernel/fork.c:2394
kernel_clone+0x226/0x8e0 kernel/fork.c:2806
__do_sys_clone kernel/fork.c:2949 [inline]
__se_sys_clone kernel/fork.c:2933 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2933
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: 0033:0x7f11fa6fca12
Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff22b350c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 000055f556f73a01 RCX: 00007f11fa6fca12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 000055f556f58910
R10: 00007f11faad2f50 R11: 0000000000000246 R12: 000055f556f7dc40
R13: 0000000000000000 R14: 0000000000000000 R15: 000055f556f58910