INFO: task syz-executor:13196 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22184 pid:13196 tgid:13196 ppid:1 task_flags:0x400140 flags:0x08080002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
__sys_getsockopt+0x127/0x1c0 net/socket.c:2412
__do_compat_sys_socketcall net/compat.c:494 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x86a/0xa10 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f94f6c
RSP: 002b:00000000f757f650 EFLAGS: 00000206 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00000000f757f688
RDX: 00000000f7422ff4 RSI: 00000000f757f708 RDI: 00000000f757f704
RBP: 00000000f7424c40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
INFO: task syz-executor:18269 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22352 pid:18269 tgid:18269 ppid:1 task_flags:0x400140 flags:0x08080002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
__sys_getsockopt+0x127/0x1c0 net/socket.c:2412
__do_compat_sys_socketcall net/compat.c:494 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x86a/0xa10 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf701ef6c
RSP: 002b:00000000f753f650 EFLAGS: 00000206 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00000000f753f688
RDX: 00000000f73e2ff4 RSI: 00000000f753f708 RDI: 00000000f753f704
RBP: 00000000f73e4c40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
INFO: task syz-executor:19609 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21088 pid:19609 tgid:19609 ppid:1 task_flags:0x400140 flags:0x08080002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
__sys_getsockopt+0x127/0x1c0 net/socket.c:2412
__do_compat_sys_socketcall net/compat.c:494 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x86a/0xa10 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf708ef6c
RSP: 002b:00000000f75af650 EFLAGS: 00000206 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00000000f75af688
RDX: 00000000f7452ff4 RSI: 00000000f75af708 RDI: 00000000f75af704
RBP: 00000000f7454c40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
INFO: task syz-executor:20239 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22088 pid:20239 tgid:20239 ppid:1 task_flags:0x400140 flags:0x08080002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
__sys_getsockopt+0x127/0x1c0 net/socket.c:2412
__do_compat_sys_socketcall net/compat.c:494 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x86a/0xa10 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf701ef6c
RSP: 002b:00000000f753f650 EFLAGS: 00000206 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00000000f753f688
RDX: 00000000f73e2ff4 RSI: 00000000f753f708 RDI: 00000000f753f704
RBP: 00000000f73e4c40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5582:
#0: ffff888034d2b0a0 (&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+0x45c/0x13c0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/13196:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/18269:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/19609:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
2 locks held by kworker/1:2/19804:
1 lock held by syz-executor/20239:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
3 locks held by kworker/u8:3/21404:
#0: ffff888031371948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff888031371948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc900033f7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc900033f7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0 net/ipv6/addrconf.c:4198
3 locks held by kworker/u8:16/21415:
#0: ffff88813fe54148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff88813fe54148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc90003467c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc90003467c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
7 locks held by kworker/u8:17/21416:
#0: ffff88801bade948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff88801bade948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc900032f7c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc900032f7c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffffffff8fbc1fd0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800 net/core/net_namespace.c:675
#3: ffff88807aba9130 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:949 [inline]
#3: ffff88807aba9130 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88807aba9130 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x11b/0x3f0 net/devlink/core.c:504
#4: ffff88807abac250 (&devlink->lock_key#24){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:274 [inline]
#4: ffff88807abac250 (&devlink->lock_key#24){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff88807abac250 (&devlink->lock_key#24){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x12d/0x3f0 net/devlink/core.c:504
#5: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0xed/0x680 drivers/net/netdevsim/netdev.c:1180
#6: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#6: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz.1.4537/22040:
1 lock held by syz-executor/22047:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22064:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22066:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22067:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22181:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22753:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
1 lock held by syz-executor/22759:
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: get_info net/ipv6/netfilter/ip6_tables.c:977 [inline]
#0: ffff888031228e38 (&xt[i].compat_mutex){+.+.}-{4:4}, at: do_ip6t_get_ctl+0x701/0x1230 net/ipv6/netfilter/ip6_tables.c:1668
7 locks held by syz-executor/22832:
#0: ffff88803471a420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2710 [inline]
#0: ffff88803471a420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90 fs/read_write.c:684
#1: ffff888073d67088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540 fs/kernfs/file.c:343
#2: ffff888029089968 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff888029089968 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540 fs/kernfs/file.c:344
#3: ffffffff8f444988 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370 drivers/net/netdevsim/bus.c:234
#4: ffff888054f6c130 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:949 [inline]
#4: ffff888054f6c130 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1166 [inline]
#4: ffff888054f6c130 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x870 drivers/base/dd.c:1364
#5: ffff888054f6d250 (&devlink->lock_key#20){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x170 drivers/net/netdevsim/dev.c:1778
#6: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#6: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_dev_lock+0x257/0x2f0 net/core/dev.c:2162
1 lock held by syz-executor/22836:
#0: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4093
4 locks held by syz-executor/22847:
#0: ffff88803471a420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2710 [inline]
#0: ffff88803471a420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90 fs/read_write.c:684
#1: ffff8880646d7088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540 fs/kernfs/file.c:343
#2: ffff888029089968 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff888029089968 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540 fs/kernfs/file.c:344
#3: ffffffff8f444988 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370 drivers/net/netdevsim/bus.c:234
2 locks held by syz-executor/22848:
#0: ffffffff8f304648 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8f304648 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8f304648 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4093
2 locks held by syz-executor/22870:
#0: ffffffff8f333668 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8f333668 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8f333668 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8fbd0748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4093
2 locks held by dhcpcd/22874:
#0: ffff88806a1f2260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1709 [inline]
#0: ffff88806a1f2260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
#1: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
1 lock held by dhcpcd/22875:
#0: ffff888053b68260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1709 [inline]
#0: ffff888053b68260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5193 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:napi_id_valid include/net/busy_poll.h:29 [inline]
RIP: 0010:ep_suspend_napi_irqs fs/eventpoll.c:550 [inline]
RIP: 0010:ep_try_send_events+0xd82/0xf10 fs/eventpoll.c:1907
Code: 44 89 f6 e8 20 7a 6b ff 45 85 f6 7e 65 48 81 c3 c8 01 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3e 01 00 00 8b 1b <bf> 08 00 00 00 89 de e8 f2 79 6b ff 83 fb 08 76 3e 45 89 f7 4c 8b
RSP: 0018:ffffc90002f37ac0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807c335b80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002f37bf0 R08: ffffc90002f37a47 R09: 1ffff920005e6f48
R10: dffffc0000000000 R11: fffff520005e6f49 R12: ffffc90002f37b60
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000001
FS: 00007f69301df880(0000) GS:ffff888125554000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005602a5b24168 CR3: 000000007cb1c000 CR4: 00000000003526f0
Call Trace:
<TASK>
ep_poll fs/eventpoll.c:1970 [inline]
do_epoll_wait+0x5cf/0xf60 fs/eventpoll.c:2462
__do_sys_epoll_wait fs/eventpoll.c:2470 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2465 [inline]
__x64_sys_epoll_wait+0x1d7/0x230 fs/eventpoll.c:2465
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f692faa7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff90a4a3a0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f69301df880 RCX: 00007f692faa7407
RDX: 0000000000000008 RSI: 00007fff90a4a500 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000bb8 R11: 0000000000000202 R12: 0000000000000000
R13: 000055578e354100 R14: 0000000000000001 R15: 0000000000000000
</TASK>