From: syzbot <syzbot+a2fd5af4a33891110a79@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-next@vger.kernel.org,
sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com
Subject: [syzbot] linux-next test error: general protection fault in vma_merge
Date: Sun, 26 Mar 2023 20:40:40 -0700 [thread overview]
Message-ID: <000000000000c0822e05f7d9812d@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 7c4a254d78f8 Add linux-next specific files for 20230323
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15f70246c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=20fd034702e6edd2
dashboard link: https://syzkaller.appspot.com/bug?extid=a2fd5af4a33891110a79
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/dc0bbbecd2a5/disk-7c4a254d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6b2c8c7cfd4b/vmlinux-7c4a254d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ae312a388585/bzImage-7c4a254d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a2fd5af4a33891110a79@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 1 PID: 5080 Comm: syz-fuzzer Not tainted 6.3.0-rc3-next-20230323-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952
Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00
RSP: 0018:ffffc90003d0f998 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff88802974b800 RCX: 0000000000000000
RDX: 0000000000000018 RSI: ffffffff81c37957 RDI: 00000000000000c7
RBP: ffff888079aaa400 R08: 0000000000000006 R09: 0000000000000000
R10: 000000c001ffffff R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 000000c002000000 R15: 0000000000000000
FS: 000000c000524890(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe510676000 CR3: 00000000249a5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
madvise_update_vma+0x23f/0xd40 mm/madvise.c:153
madvise_vma_behavior+0x7f6/0x20e0 mm/madvise.c:1091
madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1260
do_madvise.part.0+0x193/0x470 mm/madvise.c:1439
do_madvise mm/madvise.c:1452 [inline]
__do_sys_madvise mm/madvise.c:1452 [inline]
__se_sys_madvise mm/madvise.c:1450 [inline]
__x64_sys_madvise+0x117/0x150 mm/madvise.c:1450
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x46b557
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:000000c00022de60 EFLAGS: 00000206 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000a12000 RCX: 000000000046b557
RDX: 000000000000000e RSI: 0000000000800000 RDI: 000000c001c00000
RBP: 000000c00022de88 R08: 0000000000000509 R09: 000000c001b6a000
R10: 00000000000012bd R11: 0000000000000206 R12: 0000000000000509
R13: 0000000000000003 R14: 000000c0003f1a00 R15: 00000000010e0700
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952
Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00
RSP: 0018:ffffc90003d0f998 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff88802974b800 RCX: 0000000000000000
RDX: 0000000000000018 RSI: ffffffff81c37957 RDI: 00000000000000c7
RBP: ffff888079aaa400 R08: 0000000000000006 R09: 0000000000000000
R10: 000000c001ffffff R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 000000c002000000 R15: 0000000000000000
FS: 000000c000524890(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564702bbb078 CR3: 00000000249a5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 00 or %al,(%rax)
2: 0f 84 b0 03 00 00 je 0x3b8
8: e8 e9 54 bf ff callq 0xffbf54f6
d: 48 8b 44 24 08 mov 0x8(%rsp),%rax
12: 48 8d b8 a8 00 00 00 lea 0xa8(%rax),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 4d 18 00 00 jne 0x1881
34: 48 8b 44 24 08 mov 0x8(%rsp),%rax
39: 48 8b b0 a8 00 00 00 mov 0xa8(%rax),%rsi
---
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:[~2023-03-27 3:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 3:40 syzbot [this message]
2023-03-27 8:42 ` [syzbot] linux-next test error: general protection fault in vma_merge Vlastimil Babka
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=000000000000c0822e05f7d9812d@google.com \
--to=syzbot+a2fd5af4a33891110a79@syzkaller.appspotmail.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-next@vger.kernel.org \
--cc=sfr@canb.auug.org.au \
--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.