syzbot


INFO: task can't die in __might_resched

Status: auto-closed as invalid on 2021/12/18 19:15
Reported-by: syzbot+956e07db354b858e5982@syzkaller.appspotmail.com
First crash: 412d, last: 412d

Sample crash report:
INFO: task syz-executor.0:26247 can't die for more than 143 seconds.
task:syz-executor.0  state:R  running task     stack:27016 pid:26247 ppid: 11600 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4965 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6246
 lock_is_held include/linux/lockdep.h:283 [inline]
 __might_resched+0x21/0x2c0 kernel/sched/core.c:9495
 </TASK>
INFO: task syz-executor.4:26248 can't die for more than 147 seconds.
task:syz-executor.4  state:R  running task     stack:26952 pid:26248 ppid:  6576 flags:0x00004006
Call Trace:
 <TASK>
 </TASK>
INFO: task syz-executor.2:26252 can't die for more than 152 seconds.
task:syz-executor.2  state:R  running task     stack:27808 pid:26252 ppid:  6567 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4965 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6246
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6412
 __cond_resched+0x13/0x20 kernel/sched/core.c:8125
 _cond_resched include/linux/sched.h:2027 [inline]
 inet_twsk_purge+0xed/0x7d0 net/ipv4/inet_timewait_sock.c:267
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
 setup_net+0x639/0xa30 net/core/net_namespace.c:349
 copy_net_ns+0x318/0x760 net/core/net_namespace.c:470
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
 ksys_unshare+0x445/0x920 kernel/fork.c:3125
 __do_sys_unshare kernel/fork.c:3196 [inline]
 __se_sys_unshare kernel/fork.c:3194 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3194
 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: 0033:0x7fb253f81a39
RSP: 002b:00007fb2514b5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fb2540850e0 RCX: 00007fb253f81a39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007fb253fdbc5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe0693d6f R14: 00007fb2514b5300 R15: 0000000000022000
 </TASK>

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/10/19 19:14 linux-next 60e8840126bd 466b7db1 .config log report info INFO: task can't die in __might_resched
* Struck through repros no longer work on HEAD.