syzbot


INFO: task can't die in ntfs_collate_names

Status: auto-closed as invalid on 2021/11/10 23:59
Reported-by: syzbot+2386c4b12e7a0be10559@syzkaller.appspotmail.com
First crash: 445d, last: 445d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task can't die in ntfs_collate_names (2) 1 297d 293d 0/24 auto-closed as invalid on 2022/04/07 23:29

Sample crash report:
INFO: task syz-executor.3:2435 can't die for more than 143 seconds.
task:syz-executor.3  state:R  running task     stack:27384 pid: 2435 ppid:  6558 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4955 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6302
 ntfs_collate_names+0x2ca/0x3d0 fs/ntfs/unistr.c:116

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8b97fce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by systemd-udevd/2972:
1 lock held by in:imklog/6396:
 #0: ffff8880703e40f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
3 locks held by kworker/u4:2/32429:
1 lock held by syz-executor.3/2435:

=============================================

Kernel panic - not syncing: hung_task: blocked tasks
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.14.0-next-20210910-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 panic+0x2b0/0x6dd kernel/panic.c:232
 check_hung_uninterruptible_tasks kernel/hung_task.c:258 [inline]
 watchdog.cold+0x1ca/0x1de kernel/hung_task.c:339
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/09/11 23:58 linux-next aa14a3016182 5ae8508a .config log report info INFO: task can't die in ntfs_collate_names
* Struck through repros no longer work on HEAD.