syzbot


INFO: task syz-executor can't die for more than 143 seconds. (3)

Status: auto-closed as invalid on 2020/09/18 10:04
Reported-by: syzbot+82bb085bb1a7ee87d08a@syzkaller.appspotmail.com
First crash: 715d, last: 714d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task syz-executor can't die for more than 143 seconds. (2) C done 2512 718d 985d 17/22 fixed on 2020/07/17 17:58
upstream INFO: task syz-executor can't die for more than 143 seconds. C done 61 1010d 1118d 14/22 fixed on 2019/10/15 23:40

Sample crash report:
INFO: task syz-executor.1:22321 can't die for more than 143 seconds.
syz-executor.1  R  running task    27640 22321   6933 0x00004006
Call Trace:

Showing all locks held in the system:
1 lock held by khungtaskd/1158:
 #0: ffffffff89c53980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779
1 lock held by in:imklog/6510:
 #0: ffff888095ae3db0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
2 locks held by agetty/6525:
 #0: ffff88809e509098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
 #1: ffffc90000f642e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156
2 locks held by agetty/6526:
 #0: ffff88809ffeb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
 #1: ffffc90000f902e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.1/22321:
=============================================

Kernel panic - not syncing: hung_task: blocked tasks
CPU: 1 PID: 1158 Comm: khungtaskd Not tainted 5.8.0-rc5-next-20200716-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 check_hung_uninterruptible_tasks kernel/hung_task.c:257 [inline]
 watchdog.cold+0x23e/0x24b kernel/hung_task.c:339
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2020/07/20 10:03 linux-next 4c43049f19a2 9c812472 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/07/19 10:55 linux-next 4c43049f19a2 9c812472 .config log report