From: syzbot <syzbot+29fe1bbf3a023691de49@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [mm?] general protection fault in vma_merge
Date: Thu, 23 Mar 2023 22:27:35 -0700 [thread overview]
Message-ID: <0000000000009c5ff405f79ea630@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=15230839c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8ba12b2f4a1ff93d
dashboard link: https://syzkaller.appspot.com/bug?extid=29fe1bbf3a023691de49
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c322f39e779d/disk-7c4a254d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/bc7ef0a3d51c/vmlinux-7c4a254d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d3f17e539876/bzImage-7c4a254d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+29fe1bbf3a023691de49@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000015: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af]
CPU: 0 PID: 5796 Comm: modprobe 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:ffffc9000c24fac8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801cbb2100 RCX: 0000000000000000
RDX: 0000000000000015 RSI: ffffffff81c37957 RDI: 00000000000000a9
RBP: ffff888027fee400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00007faf14caa000 R15: ffff88801d2b3400
FS: 00007faf14ca4800(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faf14dd3920 CR3: 0000000078d00000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mprotect_fixup+0x353/0xbd0 mm/mprotect.c:676
do_mprotect_pkey+0x878/0xd20 mm/mprotect.c:862
__do_sys_mprotect mm/mprotect.c:883 [inline]
__se_sys_mprotect mm/mprotect.c:880 [inline]
__x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:880
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: 0033:0x7faf14fef297
Code: 44 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 73 01 c3 48 8d 0d 21 1f 01 00 f7 d8 89 01 48 83 c8 ff c3 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 01 1f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007ffda9278dc8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007faf14cac000 RCX: 00007faf14fef297
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007faf14caa000
RBP: 00007ffda9278ee0 R08: 000000000000ffff R09: 00007faf14dd2d00
R10: 00007faf14caaeb8 R11: 0000000000000206 R12: 00007faf14cac000
R13: 0000000000000007 R14: 0000001700000007 R15: 00007faf14ca75f8
</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:ffffc9000c24fac8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801cbb2100 RCX: 0000000000000000
RDX: 0000000000000015 RSI: ffffffff81c37957 RDI: 00000000000000a9
RBP: ffff888027fee400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00007faf14caa000 R15: ffff88801d2b3400
FS: 00007faf14ca4800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020004000 CR3: 0000000078d00000 CR4: 00000000003506e0
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.
reply other threads:[~2023-03-24 5:27 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=0000000000009c5ff405f79ea630@google.com \
--to=syzbot+29fe1bbf3a023691de49@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.