syzbot


INFO: task hung in rtnetlink_rcv_msg

Status: auto-obsoleted due to no activity on 2023/10/22 21:13
Reported-by: syzbot+76b22c4648c1b2eaceff@syzkaller.appspotmail.com
First crash: 506d, last: 506d
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in rtnetlink_rcv_msg (2) 14 1048d 1227d 0/1 auto-closed as invalid on 2022/05/18 11:30
linux-4.19 INFO: task hung in rtnetlink_rcv_msg (3) 8 661d 894d 0/1 upstream: reported on 2022/06/20 23:55
linux-4.19 INFO: task hung in rtnetlink_rcv_msg 11 1480d 1801d 0/1 auto-closed as invalid on 2021/03/12 19:03
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (3) 3 2d00h 73d 0/3 upstream: reported on 2024/09/19 14:16
upstream INFO: task hung in rtnetlink_rcv_msg net C inconclusive inconclusive 1970 145d 2109d 26/28 fixed on 2024/07/09 19:14
linux-4.14 INFO: task hung in rtnetlink_rcv_msg 1 641d 641d 0/1 upstream: reported on 2023/03/01 21:15
linux-5.15 INFO: task hung in rtnetlink_rcv_msg (2) 70 16d 307d 0/3 upstream: reported on 2024/01/29 02:32
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (2) 67 145d 309d 0/3 auto-obsoleted due to no activity on 2024/09/17 07:45
linux-6.1 INFO: task hung in rtnetlink_rcv_msg 1 430d 430d 0/3 auto-obsoleted due to no activity on 2024/01/09 18:18
upstream INFO: task hung in cangw_pernet_exit (3) can syz unreliable 290 1069d 1176d 0/28 closed as invalid on 2022/02/08 10:22

Sample crash report:
INFO: task syz-executor.2:21935 blocked for more than 143 seconds.
      Not tainted 5.15.120-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D
 stack:26456 pid:21935 ppid:  3531 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5590
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1923
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2412
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2466
 __sys_sendmsg net/socket.c:2495 [inline]
 __do_sys_sendmsg net/socket.c:2504 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2502
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f46cc40bb29
RSP: 002b:00007f46ca94b0c8 EFLAGS: 00000246
 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f46cc52b120 RCX: 00007f46cc40bb29
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000007
RBP: 00007f46cc45747a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f46cc52b120 R15: 00007fff13c2e308
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/1:1/25:

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/14 21:13 linux-5.15.y d54cfc420586 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in rtnetlink_rcv_msg
* Struck through repros no longer work on HEAD.