linux-kernel - invalid opcode in map

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Message-ID: <00000000000096760d05aff79022@google.com>
Date:   Wed, 23 Sep 2020 02:18:21 -0700
From:   syzbot <syzbot+9cf5373b0e15476f39a2@...kaller.appspotmail.com>
To:     bp@...en8.de, hpa@...or.com, linux-kernel@...r.kernel.org,
        luto@...nel.org, mingo@...hat.com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org
Subject: invalid opcode in map_vdso

Hello,

syzbot found the following issue on:

HEAD commit:    92ab97ad Merge tag 'sh-for-5.9-part2' of git://git.libc.or..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1553eff1900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cd992d74d6c7e62
dashboard link: https://syzkaller.appspot.com/bug?extid=9cf5373b0e15476f39a2
compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)

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+9cf5373b0e15476f39a2@...kaller.appspotmail.com

invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 16405 Comm: modprobe Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vdso+0x1e3/0x270 arch/x86/entry/vdso/vma.c:308
Code: 16 48 89 ef 48 8b 34 24 31 c9 e8 88 7c a7 00 eb 7a 4c 8b 74 24 28 43 80 3c 3e 00 48 8b 5c 24 08 74 08 4c 89 ef e8 4d 77 70 70 <07> 20 05 00 00 49 03 6d 00 48 89 e8 48 c1 e8 03 42 80 3c 38 00 74
RSP: 0018:ffffc90006167b98 EFLAGS: 00010246
RAX: ffff8880a7db8420 RBX: ffff88809d5fd7f8 RCX: ffff8880a811a040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88809d5fd740 R08: ffffffff81912471 R09: fffffbfff131e57c
R10: fffffbfff131e57c R11: 0000000000000000 R12: 00007ffea1107000
R13: ffff8880a811a468 R14: 1ffff1101502348d R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f33d09f8fc0 CR3: 0000000097210000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 load_elf_binary+0x2e90/0x48a0 fs/binfmt_elf.c:1221
 search_binary_handler fs/exec.c:1819 [inline]
 exec_binprm fs/exec.c:1860 [inline]
 bprm_execve+0x919/0x1500 fs/exec.c:1931
 kernel_execve+0x871/0x970 fs/exec.c:2080
 call_usermodehelper_exec_async+0x204/0x330 kernel/umh.c:101
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace 8d12c4aa58699b40 ]---
RIP: 0010:map_vdso+0x1e3/0x270 arch/x86/entry/vdso/vma.c:308
Code: 16 48 89 ef 48 8b 34 24 31 c9 e8 88 7c a7 00 eb 7a 4c 8b 74 24 28 43 80 3c 3e 00 48 8b 5c 24 08 74 08 4c 89 ef e8 4d 77 70 70 <07> 20 05 00 00 49 03 6d 00 48 89 e8 48 c1 e8 03 42 80 3c 38 00 74
RSP: 0018:ffffc90006167b98 EFLAGS: 00010246
RAX: ffff8880a7db8420 RBX: ffff88809d5fd7f8 RCX: ffff8880a811a040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88809d5fd740 R08: ffffffff81912471 R09: fffffbfff131e57c
R10: fffffbfff131e57c R11: 0000000000000000 R12: 00007ffea1107000
R13: ffff8880a811a468 R14: 1ffff1101502348d R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f33d09f8fc0 CR3: 0000000097210000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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