From: syzbot <syzbot+e58112d71f77113ddb7b@syzkaller.appspotmail.com>
To: aarcange@redhat.com, akpm@linux-foundation.org,
christian@brauner.io, ebiederm@xmission.com,
elena.reshetova@intel.com, guro@fb.com, keescook@chromium.org,
ldv@altlinux.org, linux-kernel@vger.kernel.org,
luto@amacapital.net, mhocko@suse.com, mingo@kernel.org,
namit@vmware.com, peterz@infradead.org,
syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk,
wad@chromium.org
Subject: WARNING in __mmdrop
Date: Thu, 18 Jul 2019 20:35:05 -0700 [thread overview]
Message-ID: <0000000000008dd6bb058e006938@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 6d21a41b Add linux-next specific files for 20190718
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=134920f0600000
kernel config: https://syzkaller.appspot.com/x/.config?x=3430a151e1452331
dashboard link: https://syzkaller.appspot.com/bug?extid=e58112d71f77113ddb7b
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10139e68600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+e58112d71f77113ddb7b@syzkaller.appspotmail.com
WARNING: CPU: 0 PID: 9142 at kernel/fork.c:677 __mmdrop+0x26a/0x320
/kernel/fork.c:677
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9142 Comm: syz-executor.0 Not tainted 5.2.0-next-20190718 #41
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
panic+0x2dc/0x755 /kernel/panic.c:219
__warn.cold+0x20/0x4c /kernel/panic.c:576
report_bug+0x263/0x2b0 /lib/bug.c:186
fixup_bug /arch/x86/kernel/traps.c:179 [inline]
fixup_bug /arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0x11b/0x200 /arch/x86/kernel/traps.c:272
do_invalid_op+0x37/0x50 /arch/x86/kernel/traps.c:291
invalid_op+0x14/0x20 /arch/x86/entry/entry_64.S:1008
RIP: 0010:__mmdrop+0x26a/0x320 /kernel/fork.c:677
Code: 5f 5d c3 e8 18 7e 2f 00 4c 89 ef e8 60 d7 2b 00 eb d2 e8 09 7e 2f 00
0f 0b e8 02 7e 2f 00 0f 0b e9 fa fd ff ff e8 f6 7d 2f 00 <0f> 0b e9 2b fe
ff ff e8 ea 7d 2f 00 4c 89 e7 e8 a2 f7 67 00 e9 85
RSP: 0018:ffff8880a176fac0 EFLAGS: 00010293
RAX: ffff888098f02600 RBX: ffff888098f02600 RCX: ffffffff81430bab
RDX: 0000000000000000 RSI: ffffffff814306fa RDI: ffff888098f02a30
RBP: ffff8880a176fae8 R08: ffff888098f02600 R09: ffffed10148dd4ec
R10: ffffed10148dd4eb R11: ffff8880a46ea75f R12: ffff8880a46ea700
R13: ffff8880a46ea828 R14: ffff8880a46eac50 R15: 0000000000000000
mmdrop /./include/linux/sched/mm.h:49 [inline]
__mmput /kernel/fork.c:1074 [inline]
mmput+0x3f0/0x4d0 /kernel/fork.c:1085
exit_mm /kernel/exit.c:547 [inline]
do_exit+0x84e/0x2ea0 /kernel/exit.c:864
do_group_exit+0x135/0x360 /kernel/exit.c:981
get_signal+0x47c/0x2500 /kernel/signal.c:2728
do_signal+0x87/0x1700 /arch/x86/kernel/signal.c:815
exit_to_usermode_loop+0x286/0x380 /arch/x86/entry/common.c:159
prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459819
Code: Bad RIP value.
RSP: 002b:00007f75afccbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000459819
RDX: 00000000200023c0 RSI: 000000004028af11 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75afccc6d4
R13: 00000000004c4722 R14: 00000000004d87d0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2019-07-19 3:41 UTC|newest]
Thread overview: 175+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 3:35 syzbot [this message]
2019-07-20 10:08 ` WARNING in __mmdrop syzbot
2019-07-20 10:08 ` syzbot
2019-07-21 10:02 ` Michael S. Tsirkin
2019-07-21 10:02 ` Michael S. Tsirkin
2019-07-21 12:18 ` Michael S. Tsirkin
2019-07-21 12:18 ` Michael S. Tsirkin
2019-07-22 5:24 ` Jason Wang
2019-07-22 5:24 ` Jason Wang
2019-07-22 8:08 ` Michael S. Tsirkin
2019-07-22 8:08 ` Michael S. Tsirkin
2019-07-23 4:01 ` Jason Wang
2019-07-23 4:01 ` Jason Wang
2019-07-23 5:01 ` Michael S. Tsirkin
2019-07-23 5:01 ` Michael S. Tsirkin
2019-07-23 5:47 ` Jason Wang
2019-07-23 5:47 ` Jason Wang
2019-07-23 7:23 ` Michael S. Tsirkin
2019-07-23 7:23 ` Michael S. Tsirkin
2019-07-23 7:53 ` Jason Wang
2019-07-23 7:53 ` Jason Wang
2019-07-23 8:10 ` Michael S. Tsirkin
2019-07-23 8:10 ` Michael S. Tsirkin
2019-07-23 8:49 ` Jason Wang
2019-07-23 8:49 ` Jason Wang
2019-07-23 9:26 ` Michael S. Tsirkin
2019-07-23 9:26 ` Michael S. Tsirkin
2019-07-23 13:31 ` Jason Wang
2019-07-23 13:31 ` Jason Wang
2019-07-25 5:52 ` Michael S. Tsirkin
2019-07-25 5:52 ` Michael S. Tsirkin
2019-07-25 7:43 ` Jason Wang
2019-07-25 7:43 ` Jason Wang
2019-07-25 8:28 ` Michael S. Tsirkin
2019-07-25 8:28 ` Michael S. Tsirkin
2019-07-25 13:21 ` Jason Wang
2019-07-25 13:21 ` Jason Wang
2019-07-25 13:26 ` Michael S. Tsirkin
2019-07-25 13:26 ` Michael S. Tsirkin
2019-07-25 14:25 ` Jason Wang
2019-07-25 14:25 ` Jason Wang
2019-07-26 11:49 ` Michael S. Tsirkin
2019-07-26 11:49 ` Michael S. Tsirkin
2019-07-26 12:00 ` Jason Wang
2019-07-26 12:00 ` Jason Wang
2019-07-26 12:38 ` Michael S. Tsirkin
2019-07-26 12:38 ` Michael S. Tsirkin
2019-07-26 12:53 ` Jason Wang
2019-07-26 12:53 ` Jason Wang
2019-07-26 13:36 ` Jason Wang
2019-07-26 13:36 ` Jason Wang
2019-07-26 13:49 ` Michael S. Tsirkin
2019-07-26 13:49 ` Michael S. Tsirkin
2019-07-29 5:54 ` Jason Wang
2019-07-29 5:54 ` Jason Wang
2019-07-29 8:59 ` Michael S. Tsirkin
2019-07-29 8:59 ` Michael S. Tsirkin
2019-07-29 14:24 ` Jason Wang
2019-07-29 14:24 ` Jason Wang
2019-07-29 14:44 ` Michael S. Tsirkin
2019-07-29 14:44 ` Michael S. Tsirkin
2019-07-30 7:44 ` Jason Wang
2019-07-30 7:44 ` Jason Wang
2019-07-30 8:03 ` Jason Wang
2019-07-30 8:03 ` Jason Wang
2019-07-30 15:08 ` Michael S. Tsirkin
2019-07-30 15:08 ` Michael S. Tsirkin
2019-07-31 8:49 ` Jason Wang
2019-07-31 8:49 ` Jason Wang
2019-07-31 23:00 ` Jason Gunthorpe
2019-07-31 23:00 ` Jason Gunthorpe
2019-07-26 13:47 ` Michael S. Tsirkin
2019-07-26 13:47 ` Michael S. Tsirkin
2019-07-26 14:00 ` Jason Wang
2019-07-26 14:00 ` Jason Wang
2019-07-26 14:10 ` Michael S. Tsirkin
2019-07-26 14:10 ` Michael S. Tsirkin
2019-07-26 15:03 ` Jason Gunthorpe
2019-07-26 15:03 ` Jason Gunthorpe
2019-07-29 5:56 ` Jason Wang
2019-07-29 5:56 ` Jason Wang
2019-07-21 12:28 ` RFC: call_rcu_outstanding (was Re: WARNING in __mmdrop) Michael S. Tsirkin
2019-07-21 12:28 ` Michael S. Tsirkin
2019-07-21 13:17 ` Paul E. McKenney
2019-07-21 13:17 ` Paul E. McKenney
2019-07-21 17:53 ` Michael S. Tsirkin
2019-07-21 17:53 ` Michael S. Tsirkin
2019-07-21 19:28 ` Paul E. McKenney
2019-07-21 19:28 ` Paul E. McKenney
2019-07-22 7:56 ` Michael S. Tsirkin
2019-07-22 7:56 ` Michael S. Tsirkin
2019-07-22 11:57 ` Paul E. McKenney
2019-07-22 11:57 ` Paul E. McKenney
2019-07-21 21:08 ` Matthew Wilcox
2019-07-21 21:08 ` Matthew Wilcox
2019-07-21 23:31 ` Paul E. McKenney
2019-07-21 23:31 ` Paul E. McKenney
2019-07-22 7:52 ` Michael S. Tsirkin
2019-07-22 7:52 ` Michael S. Tsirkin
2019-07-22 11:51 ` Paul E. McKenney
2019-07-22 11:51 ` Paul E. McKenney
2019-07-22 13:41 ` Jason Gunthorpe
2019-07-22 13:41 ` Jason Gunthorpe
2019-07-22 15:52 ` Paul E. McKenney
2019-07-22 15:52 ` Paul E. McKenney
2019-07-22 16:04 ` Jason Gunthorpe
2019-07-22 16:04 ` Jason Gunthorpe
2019-07-22 16:15 ` Michael S. Tsirkin
2019-07-22 16:15 ` Michael S. Tsirkin
2019-07-22 16:15 ` Paul E. McKenney
2019-07-22 16:15 ` Paul E. McKenney
2019-07-22 15:14 ` Joel Fernandes
2019-07-22 15:14 ` Joel Fernandes
2019-07-22 15:47 ` Michael S. Tsirkin
2019-07-22 15:47 ` Michael S. Tsirkin
2019-07-22 15:55 ` Paul E. McKenney
2019-07-22 15:55 ` Paul E. McKenney
2019-07-22 16:13 ` Michael S. Tsirkin
2019-07-22 16:13 ` Michael S. Tsirkin
2019-07-22 16:25 ` Paul E. McKenney
2019-07-22 16:25 ` Paul E. McKenney
2019-07-22 16:32 ` Michael S. Tsirkin
2019-07-22 16:32 ` Michael S. Tsirkin
2019-07-22 18:58 ` Paul E. McKenney
2019-07-22 18:58 ` Paul E. McKenney
2019-07-22 5:21 ` WARNING in __mmdrop Jason Wang
2019-07-22 5:21 ` Jason Wang
2019-07-22 8:02 ` Michael S. Tsirkin
2019-07-22 8:02 ` Michael S. Tsirkin
2019-07-23 3:55 ` Jason Wang
2019-07-23 3:55 ` Jason Wang
2019-07-23 5:02 ` Michael S. Tsirkin
2019-07-23 5:02 ` Michael S. Tsirkin
2019-07-23 5:48 ` Jason Wang
2019-07-23 5:48 ` Jason Wang
2019-07-23 7:25 ` Michael S. Tsirkin
2019-07-23 7:25 ` Michael S. Tsirkin
2019-07-23 7:55 ` Jason Wang
2019-07-23 7:55 ` Jason Wang
2019-07-23 7:56 ` Michael S. Tsirkin
2019-07-23 7:56 ` Michael S. Tsirkin
2019-07-23 8:42 ` Jason Wang
2019-07-23 8:42 ` Jason Wang
2019-07-23 10:27 ` Michael S. Tsirkin
2019-07-23 10:27 ` Michael S. Tsirkin
2019-07-23 13:34 ` Jason Wang
2019-07-23 13:34 ` Jason Wang
2019-07-23 15:02 ` Michael S. Tsirkin
2019-07-23 15:02 ` Michael S. Tsirkin
2019-07-24 2:17 ` Jason Wang
2019-07-24 2:17 ` Jason Wang
2019-07-24 8:05 ` Michael S. Tsirkin
2019-07-24 8:05 ` Michael S. Tsirkin
2019-07-24 10:08 ` Jason Wang
2019-07-24 10:08 ` Jason Wang
2019-07-24 18:25 ` Michael S. Tsirkin
2019-07-24 18:25 ` Michael S. Tsirkin
2019-07-25 3:44 ` Jason Wang
2019-07-25 3:44 ` Jason Wang
2019-07-25 5:09 ` Michael S. Tsirkin
2019-07-25 5:09 ` Michael S. Tsirkin
2019-07-24 16:53 ` Jason Gunthorpe
2019-07-24 16:53 ` Jason Gunthorpe
2019-07-24 18:25 ` Michael S. Tsirkin
2019-07-24 18:25 ` Michael S. Tsirkin
2019-07-23 10:42 ` Michael S. Tsirkin
2019-07-23 10:42 ` Michael S. Tsirkin
2019-07-23 13:37 ` Jason Wang
2019-07-23 13:37 ` Jason Wang
2019-07-22 14:11 ` Jason Gunthorpe
2019-07-22 14:11 ` Jason Gunthorpe
2019-07-25 6:02 ` Michael S. Tsirkin
2019-07-25 6:02 ` Michael S. Tsirkin
2019-07-25 7:44 ` Jason Wang
2019-07-25 7:44 ` Jason Wang
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