bisecting fixing commit since f40ddce88593482919761f74910f42f4b84c004b
building syzkaller on 98682e5e2aefc9aad61354f4f3ac93be96002a2a
testing commit f40ddce88593482919761f74910f42f4b84c004b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: bf4f85e28aa1576008c78cf0b56ae7377546e77e072e0e55b4041356efff78ab
run #0: crashed: INFO: task hung in addrconf_dad_work
run #1: crashed: INFO: task hung in addrconf_dad_work
run #2: crashed: INFO: task hung in addrconf_dad_work
run #3: crashed: INFO: task hung in addrconf_dad_work
run #4: crashed: INFO: task hung in disconnect_work
run #5: crashed: INFO: task hung in disconnect_work
run #6: crashed: INFO: task hung in addrconf_dad_work
run #7: crashed: INFO: task hung in linkwatch_event
run #8: crashed: INFO: task hung in linkwatch_event
run #9: crashed: INFO: task hung in linkwatch_event
run #10: crashed: INFO: task hung in linkwatch_event
run #11: crashed: INFO: task hung in linkwatch_event
run #12: crashed: INFO: task hung in disconnect_work
run #13: crashed: INFO: task hung in addrconf_dad_work
run #14: crashed: INFO: task hung in linkwatch_event
run #15: crashed: INFO: task hung in addrconf_dad_work
run #16: crashed: INFO: task hung in addrconf_dad_work
run #17: crashed: INFO: task hung in addrconf_dad_work
run #18: crashed: INFO: task hung in addrconf_dad_work
run #19: crashed: INFO: task hung in addrconf_dad_work
testing current HEAD 42eb8fdac2fc5d62392dcfcf0253753e821a97b0
testing commit 42eb8fdac2fc5d62392dcfcf0253753e821a97b0
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1e9f29a08f0f0f21657ec81a145fddbbb02b831042d6f71e3f9bf19fe274c57e
run #0: crashed: INFO: task hung in addrconf_dad_work
run #1: crashed: INFO: task hung in linkwatch_event
run #2: crashed: INFO: task hung in linkwatch_event
run #3: crashed: INFO: task hung in addrconf_dad_work
run #4: crashed: INFO: task hung in disconnect_work
run #5: crashed: INFO: task hung in addrconf_dad_work
run #6: crashed: INFO: task hung in linkwatch_event
run #7: crashed: INFO: task hung in linkwatch_event
run #8: crashed: INFO: task hung in linkwatch_event
run #9: crashed: INFO: task hung in linkwatch_event
revisions tested: 2, total time: 25m44.736300741s (build: 12m29.092456314s, test: 12m21.264600458s)
the crash still happens on HEAD
commit msg: Merge tag 'gfs2-v5.16-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
crash: INFO: task hung in linkwatch_event
INFO: task kworker/1:5:6864 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5 state:D stack:27560 pid: 6864 ppid: 2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
linkwatch_event+0x5/0x50 net/core/link_watch.c:251
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
process_scheduled_works kernel/workqueue.c:2361 [inline]
worker_thread+0x74b/0x1040 kernel/workqueue.c:2447
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.0:7028 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24392 pid: 7028 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
__sys_sendto+0x1a4/0x270 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xd8/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41922c
RSP: 002b:00007ffc2765d600 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc2765d644 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.3:7030 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24352 pid: 7030 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
__sys_sendto+0x1a4/0x270 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xd8/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41922c
RSP: 002b:00007ffc0bdd6200 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc0bdd6244 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.2:7032 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24440 pid: 7032 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
__sys_sendto+0x1a4/0x270 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xd8/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41922c
RSP: 002b:00007ffe20995600 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 000000000000002c RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe20995644 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.4:7033 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23336 pid: 7033 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
__sys_sendto+0x1a4/0x270 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xd8/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41922c
RSP: 002b:00007ffcf8bbf120 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffcf8bbf164 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.5:7034 blocked for more than 145 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23608 pid: 7034 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
__sys_sendto+0x1a4/0x270 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xd8/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41922c
RSP: 002b:00007ffff528d020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000040 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffff528d064 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task kworker/0:4:8965 blocked for more than 145 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4 state:D stack:27376 pid: 8965 ppid: 2 flags:0x00004000
Workqueue: events disconnect_work
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
disconnect_work+0xf/0x1b0 net/wireless/sme.c:663
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/0:5:8984 blocked for more than 145 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5 state:D stack:27864 pid: 8984 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4052
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:7:8994 blocked for more than 145 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7 state:D stack:27872 pid: 8994 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4052
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8ad77d00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6207:
#0: ffff888078adc670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:990
3 locks held by kworker/1:4/6863:
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc90003047db8 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x74/0xa30 net/wireless/reg.c:2423
3 locks held by kworker/1:5/6864:
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc90002ff7db8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x50 net/core/link_watch.c:251
1 lock held by syz-executor.0/7028:
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.3/7030:
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.2/7032:
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.4/7033:
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.5/7034:
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
3 locks held by kworker/0:4/8965:
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000bedfdb8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0xf/0x1b0 net/wireless/sme.c:663
3 locks held by kworker/0:5/8984:
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000bf1fdb8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4052
3 locks held by kworker/1:7/8994:
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888147935138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000bf3fdb8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffffffff8c439788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4052
4 locks held by syz-executor.1/9034:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x45/0x59 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xac lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x11a/0x160 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9034 Comm: syz-executor.1 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ieee80211_chanctx_radar_detect+0x1cb/0x350 net/mac80211/util.c:4368
Code: 98 50 f5 ff ff 49 39 c5 0f 84 96 00 00 00 48 bd 00 00 00 00 00 fc ff df 48 8d bb 50 0c 00 00 48 89 f8 48 c1 e8 03 0f b6 04 28 <84> c0 74 06 0f 8e 0a 01 00 00 80 bb 50 0c 00 00 00 74 38 48 8d bb
RSP: 0018:ffffc9000c28f2f0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff888066ed8c80 RCX: 1ffff11002064c86
RDX: 1ffff11002064c84 RSI: ffffffff88eb5160 RDI: ffff888066ed98d0
RBP: dffffc0000000000 R08: 0000000000000003 R09: ffffc9000c28f36f
R10: fffff52001851e6d R11: ffff888070ad0cf8 R12: 0000000000000000
R13: ffff888010326420 R14: ffff888010326400 R15: ffff888010326440
FS: 00007fc5d0765700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f166f220000 CR3: 000000005ab82000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_check_combinations+0x329/0x700 net/mac80211/util.c:4427
ieee80211_check_concurrent_iface+0x3a6/0x4c0 net/mac80211/iface.c:306
ieee80211_runtime_change_iftype net/mac80211/iface.c:1718 [inline]
ieee80211_if_change_type+0x269/0x6a0 net/mac80211/iface.c:1764
ieee80211_change_iface+0x50/0x320 net/mac80211/cfg.c:189
rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
cfg80211_change_iface+0x4b2/0xc40 net/wireless/util.c:1075
nl80211_set_interface+0x432/0x840 net/wireless/nl80211.c:3976
genl_family_rcv_msg_doit+0x1e4/0x2f0 net/netlink/genetlink.c:731
genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:792
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2491
genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2409
___sys_sendmsg+0xd3/0x150 net/socket.c:2463
__sys_sendmsg+0xb2/0x140 net/socket.c:2492
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465d99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc5d0765188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465d99
RDX: 0000000004000004 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00000000004bcf27 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffcd4808d5f R14: 00007fc5d0765300 R15: 0000000000022000
----------------
Code disassembly (best guess), 5 bytes skipped:
0: 49 39 c5 cmp %rax,%r13
3: 0f 84 96 00 00 00 je 0x9f
9: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
10: fc ff df
13: 48 8d bb 50 0c 00 00 lea 0xc50(%rbx),%rdi
1a: 48 89 f8 mov %rdi,%rax
1d: 48 c1 e8 03 shr $0x3,%rax
21: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax
* 25: 84 c0 test %al,%al <-- trapping instruction
27: 74 06 je 0x2f
29: 0f 8e 0a 01 00 00 jle 0x139
2f: 80 bb 50 0c 00 00 00 cmpb $0x0,0xc50(%rbx)
36: 74 38 je 0x70
38: 48 rex.W
39: 8d .byte 0x8d
3a: bb .byte 0xbb