syzbot


INFO: task hung in dup_mm

Status: auto-closed as invalid on 2020/10/06 05:48
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 996d, last: 933d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in dup_mm (2) 7 433d 577d 0/24 closed as invalid on 2022/02/07 19:19

Sample crash report:
INFO: task syz-executor.2:7030 blocked for more than 143 seconds.
      Not tainted 5.8.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D23968  7030   7021 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3453 [inline]
 __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178
 schedule+0xd0/0x2a0 kernel/sched/core.c:4253
 rwsem_down_write_slowpath+0x603/0xc60 kernel/locking/rwsem.c:1235
 __down_write kernel/locking/rwsem.c:1389 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1532
 i_mmap_lock_write include/linux/fs.h:528 [inline]
 dup_mmap kernel/fork.c:576 [inline]
 dup_mm+0x6bf/0x1300 kernel/fork.c:1371
 copy_mm kernel/fork.c:1427 [inline]
 copy_process+0x2aa2/0x6d90 kernel/fork.c:2098
 _do_fork+0x12c/0xa70 kernel/fork.c:2443

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-root 2020/07/08 05:46 upstream 7cc2a8ea1048 51095195 .config console log report
ci-upstream-kasan-gce-selinux-root 2020/05/05 19:21 upstream 47cf1b422e60 4b76dd25 .config console log report
* Struck through repros no longer work on HEAD.