From: syzbot <syzbot+721b657f8f01708b291b@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, syzkaller-bugs@googlegroups.com
Subject: kernel BUG at mm/mmap.c:LINE!
Date: Thu, 03 Sep 2020 12:09:22 -0700 [thread overview]
Message-ID: <00000000000074bbdd05ae6d7d35@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 1127b219 Merge tag 'fallthrough-fixes-5.9-rc3' of git://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=136d098e900000
kernel config: https://syzkaller.appspot.com/x/.config?x=978db74cb30aa994
dashboard link: https://syzkaller.appspot.com/bug?extid=721b657f8f01708b291b
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+721b657f8f01708b291b@syzkaller.appspotmail.com
start_brk 558decf56000 brk 558ded160000 start_stack 7ffd20847a70
arg_start 7ffd20847e89 arg_end 7ffd20847ea4 env_start 7ffd20847ea4 env_end 7ffd20847fdd
binfmt ffffffff89cdcb60 flags 200cd core_state 0000000000000000
ioctx_table 0000000000000000
------------[ cut here ]------------
kernel BUG at mm/mmap.c:427!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 28867 Comm: systemd-udevd Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:validate_mm+0x617/0x800 mm/mmap.c:427
Code: cf f5 cd ff 44 89 e6 bf ff ff ff ff e8 42 f2 cd ff 41 83 fc ff 0f 85 86 1b 01 00 e8 b3 f5 cd ff 48 8b 7c 24 18 e8 d9 59 fc ff <0f> 0b e8 a2 f5 cd ff 48 8b 54 24 28 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90015d6fd98 EFLAGS: 00010286
RAX: 000000000000038d RBX: 000000000000004f RCX: 0000000000000000
RDX: ffff8880475ac380 RSI: ffffffff815dafc7 RDI: fffff52002badf52
RBP: 0000000000000000 R08: 000000000000038d R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb1b935a8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd20959990 CR3: 0000000217691000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
remove_vma_list mm/mmap.c:2616 [inline]
__do_munmap+0x899/0x1170 mm/mmap.c:2869
__vm_munmap+0xe6/0x180 mm/mmap.c:2889
__do_sys_munmap mm/mmap.c:2915 [inline]
__se_sys_munmap mm/mmap.c:2911 [inline]
__x64_sys_munmap+0x62/0x80 mm/mmap.c:2911
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb1b81d66e7
Code: c7 c0 ff ff ff ff eb 8d 48 8b 15 ac 47 2b 00 f7 d8 64 89 02 e9 5b ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 47 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd20846cd8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000558decf56100 RCX: 00007fb1b81d66e7
RDX: 0000000000000080 RSI: 000000000080ccec RDI: 00007fb1b7064000
RBP: 0000558debda4d18 R08: 0000558decf6a3c0 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 0000558decf560e0
R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e
Modules linked in:
---[ end trace 76a00ebdfa09cc52 ]---
RIP: 0010:validate_mm+0x617/0x800 mm/mmap.c:427
Code: cf f5 cd ff 44 89 e6 bf ff ff ff ff e8 42 f2 cd ff 41 83 fc ff 0f 85 86 1b 01 00 e8 b3 f5 cd ff 48 8b 7c 24 18 e8 d9 59 fc ff <0f> 0b e8 a2 f5 cd ff 48 8b 54 24 28 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90015d6fd98 EFLAGS: 00010286
RAX: 000000000000038d RBX: 000000000000004f RCX: 0000000000000000
RDX: ffff8880475ac380 RSI: ffffffff815dafc7 RDI: fffff52002badf52
RBP: 0000000000000000 R08: 000000000000038d R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb1b935a8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad09fed000 CR3: 0000000217691000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
next reply other threads:[~2020-09-03 19:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 19:09 syzbot [this message]
2020-10-01 2:57 ` kernel BUG at mm/mmap.c:LINE! Souptick Joarder
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=00000000000074bbdd05ae6d7d35@google.com \
--to=syzbot+721b657f8f01708b291b@syzkaller.appspotmail.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.