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 linkwatch_event
run #1: crashed: INFO: task hung in linkwatch_event
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 addrconf_dad_work
run #5: crashed: INFO: task hung in linkwatch_event
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 addrconf_dad_work
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 cfg80211_event_work
run #13: crashed: INFO: task hung in disconnect_work
run #14: crashed: INFO: task hung in addrconf_dad_work
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 disconnect_work
run #18: crashed: INFO: task hung in addrconf_dad_work
run #19: crashed: INFO: task hung in addrconf_dad_work
testing current HEAD d4d016caa4b85b9aa98d7ec8c84e928621a614bc
testing commit d4d016caa4b85b9aa98d7ec8c84e928621a614bc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b4e68e00d7c1dabbfdc717255b3051f11a6f071871a828368d9d0026f967cb8e
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 linkwatch_event
run #4: crashed: INFO: task hung in addrconf_dad_work
run #5: crashed: INFO: task hung in addrconf_dad_work
run #6: crashed: INFO: task hung in addrconf_dad_work
run #7: crashed: INFO: task hung in addrconf_dad_work
run #8: crashed: INFO: task hung in disconnect_work
run #9: crashed: INFO: task hung in addrconf_dad_work
revisions tested: 2, total time: 25m53.434374807s (build: 12m45.283662921s, test: 12m18.294717967s)
the crash still happens on HEAD
commit msg: alpha: move __udiv_qrnnd library function to arch/alpha/lib/
crash: INFO: task hung in addrconf_dad_work
INFO: task kworker/0:0:5 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:26528 pid: 5 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4047
process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
worker_thread+0x598/0x1040 kernel/workqueue.c:2444
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:0:19 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:27248 pid: 19 ppid: 2 flags:0x00004000
Workqueue: events disconnect_work
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
disconnect_work+0xf/0x1b0 net/wireless/sme.c:663
process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
worker_thread+0x598/0x1040 kernel/workqueue.c:2444
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:4:6848 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:26920 pid: 6848 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4047
process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
worker_thread+0x598/0x1040 kernel/workqueue.c:2444
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/0:4:6958 blocked for more than 144 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4 state:D stack:27448 pid: 6958 ppid: 2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
linkwatch_event+0x5/0x50 net/core/link_watch.c:251
process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
worker_thread+0x598/0x1040 kernel/workqueue.c:2444
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.3:6996 blocked for more than 144 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24040 pid: 6996 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007fff7bcc05a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000020 RSI: 00000000014a4370 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007fff7bcc05e4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000010
R13: 0000000000000004 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.0:6997 blocked for more than 144 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24368 pid: 6997 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
genl_lock net/netlink/genetlink.c:33 [inline]
genl_rcv_msg+0x315/0x4a0 net/netlink/genetlink.c:790
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007ffd33ea6330 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd33ea6374 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000010
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.5:6998 blocked for more than 145 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24440 pid: 6998 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007ffd89d97c00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000040 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd89d97c44 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.1:7001 blocked for more than 145 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24360 pid: 7001 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007ffd942f7690 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000040 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd942f76d4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.4:7002 blocked for more than 145 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23944 pid: 7002 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
ieee80211_register_hw+0x1a4c/0x37c0 net/mac80211/main.c:1309
mac80211_hwsim_new_radio+0x1dd4/0x41d0 drivers/net/wireless/mac80211_hwsim.c:3358
hwsim_new_radio_nl+0x7c6/0xf50 drivers/net/wireless/mac80211_hwsim.c:3924
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:2504
genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007ffd2b25b330 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 000000000041922c
RDX: 0000000000000024 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd2b25b374 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000014a4370
INFO: task syz-executor.2:9022 blocked for more than 146 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25888 pid: 9022 ppid: 6999 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x908/0x26a0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
genl_lock net/netlink/genetlink.c:33 [inline]
genl_rcv_msg+0x315/0x4a0 net/netlink/genetlink.c:790
netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929
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:00007f2cde605030 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2cde605110 RCX: 000000000041922c
RDX: 0000000000000020 RSI: 00007f2cde605160 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007f2cde605074 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000010
R13: 0000000000000004 R14: 0000000000000000 R15: 00007f2cde605160
Showing all locks held in the system:
3 locks held by kworker/0:0/5:
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2268
#1: ffffc90000ebfdb8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2272
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4047
3 locks held by kworker/0:1/7:
#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:634 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff88800f473d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2268
#1: ffffc90000edfdb8 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2272
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x74/0xa30 net/wireless/reg.c:2423
3 locks held by kworker/1:0/19:
#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:634 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2268
#1: ffffc90000fafdb8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2272
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0xf/0x1b0 net/wireless/sme.c:663
1 lock held by khungtaskd/25:
#0: ffffffff8ab75d40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6197:
#0: ffff88801b5edd70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:990
3 locks held by kworker/1:4/6848:
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff888023489938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2268
#1: ffffc90003657db8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2272
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4047
3 locks held by kworker/0:4/6958:
#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:634 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff88800f467d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2268
#1: ffffc90002157db8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2272
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x50 net/core/link_watch.c:251
1 lock held by syz-executor.3/6996:
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
2 locks held by syz-executor.0/6997:
#0: ffffffff8c29e810 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:802
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x315/0x4a0 net/netlink/genetlink.c:790
1 lock held by syz-executor.5/6998:
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
1 lock held by syz-executor.1/7001:
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5569
3 locks held by syz-executor.4/7002:
#0: ffffffff8c29e810 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:802
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x315/0x4a0 net/netlink/genetlink.c:790
#2: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x1a4c/0x37c0 net/mac80211/main.c:1309
2 locks held by syz-executor.2/9022:
#0: ffffffff8c29e810 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:802
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8c29e8c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x315/0x4a0 net/netlink/genetlink.c:790
4 locks held by syz-executor.2/9030:
2 locks held by syz-executor.2/9039:
#0: ffffffff8c29e810 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:802
#1: ffffffff8c212848 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x1d/0x480 net/wireless/nl80211.c:14927
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 25 Comm: khungtaskd Not tainted 5.15.0-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+0x38b/0x460 kernel/kthread.c:319
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: 1132 Comm: kworker/u4:4 Not tainted 5.15.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:unwind_next_frame+0x34f/0x1ce0 arch/x86/kernel/unwind_orc.c:456
Code: e8 96 f5 ff ff 49 89 c0 4d 85 c0 0f 84 39 02 00 00 4d 8d 78 04 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 1e 09 00 00 41 0f b6 40
RSP: 0018:ffffc90000007680 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: 1ffff92000000ed8 RCX: ffffffff81003c1e
RDX: 1ffffffff19e9314 RSI: ffffffff8cf49890 RDI: ffffffff8c866458
RBP: 0000000000000001 R08: ffffffff8cf4989c R09: ffffffff8cf49890
R10: fffff52000000ef6 R11: 000000000007a089 R12: ffffc900000077a0
R13: ffffc9000000778d R14: ffffc90000007758 R15: ffffffff8cf498a0
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47086e9000 CR3: 000000006d42b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x5f/0x80 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slab.c:3261 [inline]
kmem_cache_alloc_node+0x269/0x520 mm/slab.c:3599
__alloc_skb+0x153/0x280 net/core/skbuff.c:414
__netdev_alloc_skb+0x40/0x380 net/core/skbuff.c:493
netdev_alloc_skb include/linux/skbuff.h:2877 [inline]
dev_alloc_skb include/linux/skbuff.h:2890 [inline]
__ieee80211_beacon_get+0xbb8/0x18b0 net/mac80211/tx.c:5070
ieee80211_beacon_get_tim+0x7e/0x6e0 net/mac80211/tx.c:5184
ieee80211_beacon_get include/net/mac80211.h:4981 [inline]
mac80211_hwsim_beacon_tx+0xc2/0x7b0 drivers/net/wireless/mac80211_hwsim.c:1808
__iterate_interfaces+0x103/0x360 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x53/0xf0 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xb7/0x160 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x9/0xc0 kernel/rcu/tree.c:1121
Code: e9 e6 fd ff ff 4c 89 ff e8 b4 10 4f 00 e9 1a ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 53 65 ff 05 67 ca a9 7e e2 e4 0a 07 48 c7 c3 08 2a 03 00 83 f8 07 89 c5 0f 87 84 00 00
RSP: 0018:ffffc900048dfc70 EFLAGS: 00000282
RAX: 1ffff1100d2ceac9 RBX: 0000000000000000 RCX: ffffffff815825e4
RDX: ffffffff8805c853 RSI: 0000000000000004 RDI: ffff8880b9e32a08
RBP: ffff88800f474800 R08: 0000000000000000 R09: ffff8880b9e32a0b
R10: ffffed10173c6541 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888070648c80 R14: ffff8880706496d8 R15: 0000000000000000
rcu_read_unlock include/linux/rcupdate.h:716 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:414 [inline]
batadv_nc_worker+0x648/0xd70 net/batman-adv/network-coding.c:721
process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
worker_thread+0x598/0x1040 kernel/workqueue.c:2444
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: e8 96 f5 ff ff callq 0xfffff59b
5: 49 89 c0 mov %rax,%r8
8: 4d 85 c0 test %r8,%r8
b: 0f 84 39 02 00 00 je 0x24a
11: 4d 8d 78 04 lea 0x4(%r8),%r15
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 4c 89 fa mov %r15,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
* 2a: 4c 89 fa mov %r15,%rdx <-- trapping instruction
2d: 83 e2 07 and $0x7,%edx
30: 38 d0 cmp %dl,%al
32: 7f 08 jg 0x3c
34: 84 c0 test %al,%al
36: 0f 85 1e 09 00 00 jne 0x95a
3c: 41 rex.B
3d: 0f .byte 0xf
3e: b6 40 mov $0x40,%dh