syzbot


INFO: task hung in get_info (4)

Status: closed as invalid on 2022/02/08 09:50
Subsystems: netfilter
[Documentation on labels]
First crash: 830d, last: 805d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 INFO: task hung in get_info 2 1512d 1515d 0/1 auto-closed as invalid on 2020/06/06 08:06
android-49 INFO: task hung in get_info 1 2026d 2026d 0/3 auto-closed as invalid on 2019/03/10 04:11
linux-4.19 INFO: task hung in get_info C error 13 1101d 1163d 0/1 upstream: reported C repro on 2021/01/21 06:12
android-414 INFO: task hung in get_info 14 1606d 1811d 0/1 auto-closed as invalid on 2020/03/04 07:49
upstream INFO: task hung in get_info (3) netfilter 5 1126d 1173d 0/26 auto-closed as invalid on 2021/05/27 19:05
upstream INFO: task hung in get_info (2) netfilter 2 1685d 1689d 0/26 auto-closed as invalid on 2019/11/15 17:14
android-44 INFO: task hung in get_info 3 1630d 1781d 0/2 auto-closed as invalid on 2020/02/09 04:02
android-49 INFO: task hung in get_info (2) 1 1706d 1706d 0/3 auto-closed as invalid on 2019/11/25 07:20
upstream INFO: task hung in get_info netfilter 8 2218d 2216d 0/26 auto-closed as invalid on 2019/02/22 10:34

Sample crash report:
INFO: task syz-executor.4:3641 blocked for more than 151 seconds.
      Not tainted 5.16.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:23400 pid: 3641 ppid:  3625 flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4900 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
 xt_find_table_lock+0x140/0x680 net/netfilter/x_tables.c:1242
 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1284
 get_info+0x178/0x750 net/ipv4/netfilter/arp_tables.c:808
 do_arpt_get_ctl+0x474/0x8f0 net/ipv4/netfilter/arp_tables.c:1444
 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt net/ipv4/ip_sockglue.c:1786 [inline]
 ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1765
 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4251
 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2220
 __do_sys_getsockopt net/socket.c:2235 [inline]
 __se_sys_getsockopt net/socket.c:2232 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2232
 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: 0033:0x7f1dbcc764ba
RSP: 002b:00007f1dbd2bb6c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f1dbd2bb6dc RCX: 00007f1dbcc764ba
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007f1dbd2bb6dc R09: ffffffffff000000
R10: 00007f1dbd2bb6e0 R11: 0000000000000246 R12: 00007f1dbd2bb6e0
R13: 0000000000103f9b R14: 0000000000000000 R15: 00007f1dbd2bbe40
 </TASK>
INFO: task syz-executor.2:3644 blocked for more than 158 seconds.
      Not tainted 5.16.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:23816 pid: 3644 ppid:  3623 flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4900 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
 xt_find_table_lock+0x140/0x680 net/netfilter/x_tables.c:1242
 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1284
 get_info+0x178/0x750 net/ipv4/netfilter/arp_tables.c:808

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/01/09 18:22 upstream 4634129ad9fd 2ca0d385 .config console log report info ci-upstream-kasan-gce INFO: task hung in get_info
2021/12/28 23:07 upstream ecf71de775a0 76c8cf06 .config console log report info ci-upstream-kasan-gce-386 INFO: task hung in get_info
2021/12/20 03:14 upstream f291e2d899d1 44068e19 .config console log report info ci-upstream-kasan-gce-386 INFO: task hung in get_info
2022/01/13 16:37 linux-next 27c9d5b3c24a 44d1319a .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in get_info
* Struck through repros no longer work on HEAD.