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

INFO: task syz-executor can't die for more than 143 seconds.
Status: fixed on 2019/10/15 23:40
Reported-by: syzbot+8ab2d0f39fb79fe6ca40@syzkaller.appspotmail.com
Fix commit: 8619e5bd /dev/mem: Bail out upon SIGKILL. 7c3a6aed kexec: bail out upon SIGKILL when allocating memory. 8f9e86ee staging: android: ion: Bail out upon SIGKILL when allocating memory.
First crash: 138d, last: 21d
Bisection: introduced by (bisect log):

commit 4ddc1b28aac57a90c6426d55e0dea3c1b5eb4782
Author: Chao Yu <yuchao0@huawei.com>
Date: Wed Jul 25 23:19:48 2018 +0000

f2fs: fix to restrict mount condition when without CONFIG_QUOTA

Tree: linux-next
Crash: no output from test machine (log)
Repro: C syz .config

Sample crash report:

INFO: task syz-executor050:8619 can't die for more than 143 seconds.
syz-executor050 R  running task    27536  8619   8618 0x00004006
Call Trace:

Showing all locks held in the system:
1 lock held by khungtaskd/1046:
 #0: 00000000f58b83ec (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5262
1 lock held by rsyslogd/8504:
 #0: 00000000b8867a10 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/8594:
 #0: 000000008c94b07f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000006c5169d5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8595:
 #0: 0000000042bd87ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000009ebc0e1a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8596:
 #0: 00000000ad647db4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000f68a3152 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8597:
 #0: 0000000072ec45a9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000daa58f5f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8598:
 #0: 000000007698feb5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 0000000017a6b41f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8599:
 #0: 00000000f5a5df8a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000003ed47aa1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8600:
 #0: 00000000ab9f490c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000332ddba5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
1 lock held by syz-executor050/8619:

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

NMI backtrace for cpu 0
CPU: 0 PID: 1046 Comm: khungtaskd Not tainted 5.2.0-rc4-next-20190612 #13
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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:249 [inline]
 watchdog+0xb88/0x12b0 kernel/hung_task.c:333
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8619 Comm: syz-executor050 Not tainted 5.2.0-rc4-next-20190612 #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x50 kernel/kcov.c:101
Code: f4 ff ff ff e8 9d fa e9 ff 48 c7 05 ce b0 15 09 00 00 00 00 e9 a4 e9 ff ff 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 <65> 48 8b 04 25 c0 fd 01 00 65 8b 15 f0 fa 90 7e 81 e2 00 01 1f 00
RSP: 0018:ffff8880a9acfd80 EFLAGS: 00000206
RAX: 1ffffd40000720d9 RBX: 0000160000000000 RCX: ffffffff81682654
RDX: 0000000000000000 RSI: ffffffff8168263c RDI: ffffea00003906c8
RBP: ffff8880a9acfd80 R08: ffff88808fe146c0 R09: 0000000000000002
R10: ffff88808fe14f78 R11: ffff88808fe146c0 R12: ffffea0000390688
R13: dffffc0000000000 R14: ffffea0000390680 R15: 00000000049a5000
FS:  0000555555a3e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a3d59000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 page_to_boot_pfn include/linux/kexec.h:325 [inline]
 kimage_alloc_page+0xac/0x9f0 kernel/kexec_core.c:708
 kimage_load_normal_segment kernel/kexec_core.c:802 [inline]
 kimage_load_segment+0x25d/0x740 kernel/kexec_core.c:919
 do_kexec_load+0x41a/0x600 kernel/kexec.c:157
 __do_sys_kexec_load kernel/kexec.c:251 [inline]
 __se_sys_kexec_load kernel/kexec.c:226 [inline]
 __x64_sys_kexec_load+0x1d5/0x260 kernel/kexec.c:226
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441149
Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd407ca1e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441149
RDX: 0000000020000100 RSI: 0000000000000001 RDI: fffffffffffffffe
RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f70
R13: 0000000000402000 R14: 0000000000000000 R15: 0000000000000000

Crashes (61):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-linux-next-kasan-gce-root	2019/06/12 20:52	linux-next	81a72c79	794a1ad7	.config	log	report	syz	C	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/22 04:44	linux-next	a34a6117	984250d5	.config	log	report	syz	C	arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/04 07:31	linux-next	56b697c6	ce07a7ae	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/28 18:56	linux-next	bb2aee77	eb6b9855	.config	log	report			ast@kernel.org, bpf@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, hawk@kernel.org, idosch@mellanox.com, jakub.kicinski@netronome.com, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, nikolay@cumulusnetworks.com, petrm@mellanox.com, roopa@cumulusnetworks.com, songliubraving@fb.com, yhs@fb.com
ci-upstream-linux-next-kasan-gce-root	2019/09/17 15:02	linux-next	f84e1c16	13dcda9b	.config	log	report			bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/09/15 22:13	linux-next	6d028043	32d59357	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/12 01:34	linux-next	6d028043	f4e53c10	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/11 08:52	linux-next	6d028043	a60cb4cd	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/04 00:02	linux-next	6d028043	526709ff	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/09/01 03:31	linux-next	6d028043	bad3cce2	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/28 07:56	linux-next	ed2393ca	fd37b39e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/26 12:57	linux-next	9733a7c6	d21c5d9d	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/25 07:56	linux-next	9733a7c6	d21c5d9d	.config	log	report			gregkh@linuxfoundation.org, jslaby@suse.com, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/23 04:24	linux-next	b5835edc	ca6f3cfa	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/20 16:15	linux-next	54c851a8	cfc9868f	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/15 12:25	linux-next	17da61ae	0d298d6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/12 05:13	linux-next	87b983f5	acb51638	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/09 18:23	linux-next	87b983f5	ede31a9b	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/09 03:47	linux-next	2ae25631	ede31a9b	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/28 13:00	linux-next	fde50b96	c85e1c5b	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/26 17:32	linux-next	fde50b96	3e5d1beb	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/26 01:39	linux-next	13bf6d6a	732bc5a0	.config	log	report			bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/25 09:21	linux-next	13bf6d6a	32329ceb	.config	log	report			gregkh@linuxfoundation.org, jslaby@suse.com, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/25 02:30	linux-next	9e6dfe80	32329ceb	.config	log	report			cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, lizefan@huawei.com, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/24 21:43	linux-next	9e6dfe80	32329ceb	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/07/23 15:04	linux-next	6d21a41b	de453f34	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/07/23 03:04	linux-next	6d21a41b	55e0c077	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/22 19:45	linux-next	6d21a41b	b3c615f5	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/21 21:21	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/21 10:30	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/20 18:43	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/18 12:47	linux-next	6d21a41b	7bb222f7	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/06/30 06:35	linux-next	48568d8c	7509bf36	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/30 05:21	linux-next	48568d8c	7509bf36	.config	log	report			adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-linux-next-kasan-gce-root	2019/06/27 22:58	linux-next	8087b004	7509bf36	.config	log	report			axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/27 16:10	linux-next	8087b004	7509bf36	.config	log	report			gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/26 12:16	linux-next	90203176	4d342240	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/26 05:51	linux-next	90203176	0a8d1a96	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/25 11:39	linux-next	9ffadb46	82c13b6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/25 08:00	linux-next	9ffadb46	82c13b6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/24 19:54	linux-next	e2d28c40	472f0082	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/24 17:06	linux-next	e2d28c40	472f0082	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/22 04:18	linux-next	dc636f5d	34bf9440	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/21 12:43	linux-next	dc636f5d	34bf9440	.config	log	report			aarcange@redhat.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, osalvador@suse.de, pasha.tatashin@oracle.com, rientjes@google.com, vbabka@suse.cz, yang.shi@linux.alibaba.com, zhongjiang@huawei.com
ci-upstream-linux-next-kasan-gce-root	2019/06/20 11:42	linux-next	c0e4c41a	34bf9440	.config	log	report			jmorris@namei.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, serge@hallyn.com, takedakn@nttdata.co.jp
ci-upstream-linux-next-kasan-gce-root	2019/06/20 08:49	linux-next	c0e4c41a	34bf9440	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/20 03:11	linux-next	c0e4c41a	34bf9440	.config	log	report			asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/06/16 05:41	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/15 15:24	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/15 00:49	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/12 17:28	linux-next	81a72c79	794a1ad7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/11 18:09	linux-next	f08776ca	5b5826d0	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 11:31	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 10:33	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 04:05	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/09 23:28	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/09 21:43	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/08 11:08	linux-next	3f310e51	cf9c3a50	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/05 19:46	linux-next	b2924447	bfb4a51e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/05 02:07	linux-next	56b697c6	bfb4a51e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/04 21:43	linux-next	56b697c6	e41a20c5	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk