syzbot


INFO: task can't die in ntfs_collate_names (2)

Status: auto-closed as invalid on 2022/04/07 23:29
Reported-by: syzbot+d4fb4d2e7810c218eae9@syzkaller.appspotmail.com
First crash: 299d, last: 299d
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 1 447d 443d 0/24 auto-closed as invalid on 2021/11/10 23:59

Sample crash report:
INFO: task syz-executor.4:24683 can't die for more than 143 seconds.
task:syz-executor.4  state:R  running task     stack:27776 pid:24683 ppid:  3626 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 ntfs_collate_names+0x26e/0x3d0 fs/ntfs/unistr.c:110
RIP: ffffffff:0x3
RSP: 0246:0000000000000010 EFLAGS: ffffffff8178a4af ORIG_RAX: ffff88802ab81d40
RAX: 0000000000000000 RBX: ffff88806ae07e68 RCX: 0000000000000000
RDX: ffffffff8178ac0c RSI: ffffffff829f4508 RDI: 0000000100000202
RBP: 0000000000000000 R08: 0000000000000010 R09: ffffffff829f42d4
R10: ffff88806ae07e68 R11: ffff88806ae07eb8 R12: ffffffff89600c02
R13: ffffffff89577221 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6463
2 locks held by getty/3276:
 #0: ffff88814af91098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by udevd/3900:
1 lock held by udevd/6031:
 #0: ffff8880b9d39e58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:490
2 locks held by udevd/6032:
1 lock held by syz-executor.4/24683:

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


Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2022/02/06 23:28 linux-next ef6b35306dd8 a7dab638 .config log report info INFO: task can't die in ntfs_collate_names
* Struck through repros no longer work on HEAD.