INFO: task hung in rtnetlink_rcv_msg
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syzbot
Mar 1, 2023, 4:15:58 PM3/1/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 7878a41b6cc1 Linux 4.14.307
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12f701a8c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=77c994a24403ce1c
dashboard link: https://syzkaller.appspot.com/bug?extid=9677f1ac838552265385
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1fdebf709d79/disk-7878a41b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/88229e373f4d/vmlinux-7878a41b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bf3c4c287a8b/bzImage-7878a41b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9677f1...@syzkaller.appspotmail.com
INFO: task syz-executor.0:13164 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D29184 13164 8009 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f716cfba0f9
RSP: 002b:00007f716b4ea168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f716d0da120 RCX: 00007f716cfba0f9
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007f716d015ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff03f1290f R14: 00007f716b4ea300 R15: 0000000000022000
INFO: task syz-executor.4:13186 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29568 13186 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487c6712c
RSP: 002b:00007fd486226000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd4862260f0 RCX: 00007fd487c6712c
RDX: 0000000000000020 RSI: 00007fd486226140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fd486226054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd4862260a8
R13: 00007fd486226140 R14: 0000000000000003 R15: 0000000000000000
INFO: task syz-executor.4:13189 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29184 13189 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd486206168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd5050 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd486206300 R15: 0000000000022000
INFO: task syz-executor.4:13191 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D28592 13191 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
team_nl_cmd_options_set+0x79/0xb40 drivers/net/team/team.c:2503
genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd4861e5168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd5120 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd4861e5300 R15: 0000000000022000
INFO: task syz-executor.4:13194 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29184 13194 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd4861c4168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd51f0 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd4861c4300 R15: 0000000000022000
INFO: task syz-executor.3:13190 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29568 13190 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
8021q: adding VLAN 0 to HW filter on device batadv3
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa59412c
RSP: 002b:00007fbfa8b53000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fbfa8b530f0 RCX: 00007fbfaa59412c
RDX: 0000000000000020 RSI: 00007fbfa8b53140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fbfa8b53054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbfa8b530a8
R13: 00007fbfa8b53140 R14: 0000000000000003 R15: 0000000000000000
INFO: task syz-executor.3:13192 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29184 13192 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa5e20f9
RSP: 002b:00007fbfa8b33168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfaa702050 RCX: 00007fbfaa5e20f9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fbfaa63dae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd84392ef R14: 00007fbfa8b33300 R15: 0000000000022000
INFO: task syz-executor.3:13193 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29568 13193 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
genl_lock net/netlink/genetlink.c:33 [inline]
genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa59412c
RSP: 002b:00007fbfa8b11000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fbfa8b110f0 RCX: 00007fbfaa59412c
RDX: 0000000000000020 RSI: 00007fbfa8b11140 RDI: 0000000000000007
RBP: 0000000000000000 R08: 00007fbfa8b11054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbfa8b110a8
R13: 00007fbfa8b11140 R14: 0000000000000007 R15: 0000000000000000
INFO: task syz-executor.3:13195 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29184 13195 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa5e20f9
RSP: 002b:00007fbfa8af1168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfaa7021f0 RCX: 00007fbfaa5e20f9
team3: Port device batadv3 added
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007fbfaa63dae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd84392ef R14: 00007fbfa8af1300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1532:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8702e2fc>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
3 locks held by kworker/1:2/4316:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&(&ifa->dad_work)->work)){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86379a29>] addrconf_dad_work+0x89/0xef0 net/ipv6/addrconf.c:3925
1 lock held by syz-executor.1/8023:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff83d56f74>] tun_detach drivers/net/tun.c:593 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff83d56f74>] tun_chr_close+0x34/0x60 drivers/net/tun.c:2732
3 locks held by kworker/0:3/8803:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((addr_chk_work).work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff8637751a>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4421
3 locks held by kworker/1:4/9110:
#0: ("events"){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: (deferred_process_work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86fca9ba>] switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150
3 locks held by kworker/1:5/9252:
#0: ("events"){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((linkwatch_work).work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff85c9790a>] linkwatch_event+0xa/0x50 net/core/link_watch.c:236
1 lock held by syz-executor.4/13186:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.4/13189:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
3 locks held by syz-executor.4/13191:
#0: (cb_lock){++++}, at: [<ffffffff85e3f495>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
#2: (rtnl_mutex){+.+.}, at: [<ffffffff83d473c9>] team_nl_cmd_options_set+0x79/0xb40 drivers/net/team/team.c:2503
1 lock held by syz-executor.4/13194:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.3/13190:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.3/13192:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
2 locks held by syz-executor.3/13193:
#0: (cb_lock){++++}, at: [<ffffffff85e3f495>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
1 lock held by syz-executor.3/13195:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2713 Comm: kworker/u4:3 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: bat_events batadv_tt_purge
task: ffff8880af3fe680 task.stack: ffff8880aec00000
RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:100
RSP: 0018:ffff8880ba507c90 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff88ccd000 RCX: 0000000000000020
RDX: 1ffffffff1199a1d RSI: 0000000000025047 RDI: 0000000000000380
RBP: ffff8880ba5282c0 R08: ffff88823fff7058 R09: ffff88823fff704f
R10: ffff88823fff7057 R11: 000000673895b1b4 R12: 0000000000025047
R13: 0000000000000003 R14: 00000065e5607200 R15: ffff8880ba52ede8
FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe93618a980 CR3: 00000000ac3d8000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
apic_write arch/x86/include/asm/apic.h:385 [inline]
lapic_next_event+0x53/0x80 arch/x86/kernel/apic/apic.c:468
clockevents_program_event+0x1f1/0x2d0 kernel/time/clockevents.c:339
tick_program_event+0x78/0xd0 kernel/time/tick-oneshot.c:47
hrtimer_interrupt+0x205/0x470 kernel/time/hrtimer.c:1334
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline]
smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104
apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff8880ba507e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e13d9 RBX: 0000000000000282 RCX: 1ffff11015e7fdea
RDX: dffffc0000000000 RSI: ffff8880af3fef30 RDI: 0000000000000282
RBP: ffff8880ba52ec80 R08: ffff88823fff7058 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a3070dc0
R13: 0000000000000000 R14: ffff8880a3070f08 R15: 1ffffffff11e13db
hrtimer_start include/linux/hrtimer.h:377 [inline]
bcm_tx_start_timer+0xed/0x190 net/can/bcm.c:398
bcm_tx_timeout_tsklet+0xfc/0x320 net/can/bcm.c:430
tasklet_action+0x195/0x340 kernel/softirq.c:513
__do_softirq+0x24d/0x9ff kernel/softirq.c:288
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1019
</IRQ>
do_softirq.part.0+0x154/0x1b0 kernel/softirq.c:332
do_softirq kernel/softirq.c:324 [inline]
__local_bh_enable_ip+0x12b/0x170 kernel/softirq.c:185
spin_unlock_bh include/linux/spinlock.h:362 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2524 [inline]
batadv_tt_purge+0x319/0x930 net/batman-adv/translation-table.c:3795
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Code: 83 3d fc 05 0c 0a 01 7f 02 5d c3 89 ef 5d e9 c9 b7 df 05 48 c7 c7 00 a4 2e 8b e8 e4 7b 5c 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff <c3> 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 7878a41b6cc1 Linux 4.14.307
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12f701a8c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=77c994a24403ce1c
dashboard link: https://syzkaller.appspot.com/bug?extid=9677f1ac838552265385
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1fdebf709d79/disk-7878a41b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/88229e373f4d/vmlinux-7878a41b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bf3c4c287a8b/bzImage-7878a41b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9677f1...@syzkaller.appspotmail.com
INFO: task syz-executor.0:13164 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D29184 13164 8009 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f716cfba0f9
RSP: 002b:00007f716b4ea168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f716d0da120 RCX: 00007f716cfba0f9
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007f716d015ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff03f1290f R14: 00007f716b4ea300 R15: 0000000000022000
INFO: task syz-executor.4:13186 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29568 13186 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487c6712c
RSP: 002b:00007fd486226000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd4862260f0 RCX: 00007fd487c6712c
RDX: 0000000000000020 RSI: 00007fd486226140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fd486226054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd4862260a8
R13: 00007fd486226140 R14: 0000000000000003 R15: 0000000000000000
INFO: task syz-executor.4:13189 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29184 13189 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd486206168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd5050 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd486206300 R15: 0000000000022000
INFO: task syz-executor.4:13191 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D28592 13191 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
team_nl_cmd_options_set+0x79/0xb40 drivers/net/team/team.c:2503
genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd4861e5168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd5120 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd4861e5300 R15: 0000000000022000
INFO: task syz-executor.4:13194 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D29184 13194 8024 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd487cb50f9
RSP: 002b:00007fd4861c4168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd487dd51f0 RCX: 00007fd487cb50f9
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007fd487d10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce27e80af R14: 00007fd4861c4300 R15: 0000000000022000
INFO: task syz-executor.3:13190 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29568 13190 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
8021q: adding VLAN 0 to HW filter on device batadv3
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa59412c
RSP: 002b:00007fbfa8b53000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fbfa8b530f0 RCX: 00007fbfaa59412c
RDX: 0000000000000020 RSI: 00007fbfa8b53140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fbfa8b53054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbfa8b530a8
R13: 00007fbfa8b53140 R14: 0000000000000003 R15: 0000000000000000
INFO: task syz-executor.3:13192 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29184 13192 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa5e20f9
RSP: 002b:00007fbfa8b33168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfaa702050 RCX: 00007fbfaa5e20f9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fbfaa63dae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd84392ef R14: 00007fbfa8b33300 R15: 0000000000022000
INFO: task syz-executor.3:13193 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29568 13193 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
genl_lock net/netlink/genetlink.c:33 [inline]
genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa59412c
RSP: 002b:00007fbfa8b11000 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fbfa8b110f0 RCX: 00007fbfaa59412c
RDX: 0000000000000020 RSI: 00007fbfa8b11140 RDI: 0000000000000007
RBP: 0000000000000000 R08: 00007fbfa8b11054 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbfa8b110a8
R13: 00007fbfa8b11140 R14: 0000000000000007 R15: 0000000000000000
INFO: task syz-executor.3:13195 blocked for more than 140 seconds.
Not tainted 4.14.307-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D29184 13195 8039 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3386
schedule+0x8d/0x1b0 kernel/sched/core.c:3430
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fbfaa5e20f9
RSP: 002b:00007fbfa8af1168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfaa7021f0 RCX: 00007fbfaa5e20f9
team3: Port device batadv3 added
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007fbfaa63dae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd84392ef R14: 00007fbfa8af1300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1532:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8702e2fc>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
3 locks held by kworker/1:2/4316:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&(&ifa->dad_work)->work)){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86379a29>] addrconf_dad_work+0x89/0xef0 net/ipv6/addrconf.c:3925
1 lock held by syz-executor.1/8023:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff83d56f74>] tun_detach drivers/net/tun.c:593 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff83d56f74>] tun_chr_close+0x34/0x60 drivers/net/tun.c:2732
3 locks held by kworker/0:3/8803:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((addr_chk_work).work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff8637751a>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4421
3 locks held by kworker/1:4/9110:
#0: ("events"){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: (deferred_process_work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86fca9ba>] switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150
3 locks held by kworker/1:5/9252:
#0: ("events"){+.+.}, at: [<ffffffff81366110>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((linkwatch_work).work){+.+.}, at: [<ffffffff81366146>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (rtnl_mutex){+.+.}, at: [<ffffffff85c9790a>] linkwatch_event+0xa/0x50 net/core/link_watch.c:236
1 lock held by syz-executor.4/13186:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.4/13189:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
3 locks held by syz-executor.4/13191:
#0: (cb_lock){++++}, at: [<ffffffff85e3f495>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
#2: (rtnl_mutex){+.+.}, at: [<ffffffff83d473c9>] team_nl_cmd_options_set+0x79/0xb40 drivers/net/team/team.c:2503
1 lock held by syz-executor.4/13194:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.3/13190:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
1 lock held by syz-executor.3/13192:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
2 locks held by syz-executor.3/13193:
#0: (cb_lock){++++}, at: [<ffffffff85e3f495>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
1 lock held by syz-executor.3/13195:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2713 Comm: kworker/u4:3 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: bat_events batadv_tt_purge
task: ffff8880af3fe680 task.stack: ffff8880aec00000
RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:100
RSP: 0018:ffff8880ba507c90 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff88ccd000 RCX: 0000000000000020
RDX: 1ffffffff1199a1d RSI: 0000000000025047 RDI: 0000000000000380
RBP: ffff8880ba5282c0 R08: ffff88823fff7058 R09: ffff88823fff704f
R10: ffff88823fff7057 R11: 000000673895b1b4 R12: 0000000000025047
R13: 0000000000000003 R14: 00000065e5607200 R15: ffff8880ba52ede8
FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe93618a980 CR3: 00000000ac3d8000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
apic_write arch/x86/include/asm/apic.h:385 [inline]
lapic_next_event+0x53/0x80 arch/x86/kernel/apic/apic.c:468
clockevents_program_event+0x1f1/0x2d0 kernel/time/clockevents.c:339
tick_program_event+0x78/0xd0 kernel/time/tick-oneshot.c:47
hrtimer_interrupt+0x205/0x470 kernel/time/hrtimer.c:1334
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline]
smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104
apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff8880ba507e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e13d9 RBX: 0000000000000282 RCX: 1ffff11015e7fdea
RDX: dffffc0000000000 RSI: ffff8880af3fef30 RDI: 0000000000000282
RBP: ffff8880ba52ec80 R08: ffff88823fff7058 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a3070dc0
R13: 0000000000000000 R14: ffff8880a3070f08 R15: 1ffffffff11e13db
hrtimer_start include/linux/hrtimer.h:377 [inline]
bcm_tx_start_timer+0xed/0x190 net/can/bcm.c:398
bcm_tx_timeout_tsklet+0xfc/0x320 net/can/bcm.c:430
tasklet_action+0x195/0x340 kernel/softirq.c:513
__do_softirq+0x24d/0x9ff kernel/softirq.c:288
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1019
</IRQ>
do_softirq.part.0+0x154/0x1b0 kernel/softirq.c:332
do_softirq kernel/softirq.c:324 [inline]
__local_bh_enable_ip+0x12b/0x170 kernel/softirq.c:185
spin_unlock_bh include/linux/spinlock.h:362 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2524 [inline]
batadv_tt_purge+0x319/0x930 net/batman-adv/translation-table.c:3795
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Code: 83 3d fc 05 0c 0a 01 7f 02 5d c3 89 ef 5d e9 c9 b7 df 05 48 c7 c7 00 a4 2e 8b e8 e4 7b 5c 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff <c3> 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb
---
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