linux-kernel - [syzbot] kernel BUG in collapse

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Date:   Fri, 23 Dec 2022 01:18:35 -0800
From:   syzbot <syzbot+671b136929ae932761d5@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] kernel BUG in collapse_file (2)

Hello,

syzbot found the following issue on:

HEAD commit:    f9ff5644bcc0 Merge tag 'hsi-for-6.2' of git://git.kernel.o..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=16aac7c7880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=827916bd156c2ec6
dashboard link: https://syzkaller.appspot.com/bug?extid=671b136929ae932761d5
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15def1bf880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11f301f7880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/65961cc3b839/disk-f9ff5644.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b5f01bcb2a34/vmlinux-f9ff5644.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9becc0a3f960/bzImage-f9ff5644.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+671b136929ae932761d5@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at mm/khugepaged.c:1794!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5111 Comm: syz-executor300 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:collapse_file+0x3707/0x57d0 mm/khugepaged.c:1794
Code: ff 48 c7 c2 a0 0f 3a 8a be ce 00 00 00 48 c7 c7 00 10 3a 8a c6 05 f2 5f 68 0c 01 e8 1d 2e de 07 e9 8a e1 ff ff e8 09 6b ac ff <0f> 0b e8 02 6b ac ff 48 8b 7c 24 30 4c 89 fe e8 75 3b db 07 48 89
RSP: 0018:ffffc90003def810 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 00000000000002c0 RCX: 0000000000000000
RDX: ffff8880289c9d40 RSI: ffffffff81d4e5f7 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000006 R09: 00000000000002c0
R10: 00000000000002c1 R11: 0000000000000000 R12: 00000000000002c1
R13: 0000000000000043 R14: ffff88807e9d7ac0 R15: dffffc0000000000
FS:  00007f31c4a33700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f31c4b0e5a4 CR3: 000000001d68d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hpage_collapse_scan_file+0xdba/0x18e0 mm/khugepaged.c:2204
 madvise_collapse+0x523/0xb60 mm/khugepaged.c:2663
 madvise_vma_behavior+0x63d/0x2020 mm/madvise.c:1091
 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1265
 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1444
 do_madvise mm/madvise.c:1457 [inline]
 __do_sys_madvise mm/madvise.c:1457 [inline]
 __se_sys_madvise mm/madvise.c:1455 [inline]
 __x64_sys_madvise+0x117/0x150 mm/madvise.c:1455
 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: 0033:0x7f31c4aaaee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31c4a332f8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f31c4b2c498 RCX: 00007f31c4aaaee9
RDX: 0000000000000019 RSI: 000000000060005f RDI: 0000000020000000
RBP: 00007f31c4b2c490 R08: 0000000000000001 R09: 0000000000000034
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f31c4a33300
R13: 0000000000000001 R14: 00007f31c4a33400 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:collapse_file+0x3707/0x57d0 mm/khugepaged.c:1794
Code: ff 48 c7 c2 a0 0f 3a 8a be ce 00 00 00 48 c7 c7 00 10 3a 8a c6 05 f2 5f 68 0c 01 e8 1d 2e de 07 e9 8a e1 ff ff e8 09 6b ac ff <0f> 0b e8 02 6b ac ff 48 8b 7c 24 30 4c 89 fe e8 75 3b db 07 48 89
RSP: 0018:ffffc90003def810 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 00000000000002c0 RCX: 0000000000000000
RDX: ffff8880289c9d40 RSI: ffffffff81d4e5f7 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000006 R09: 00000000000002c0
R10: 00000000000002c1 R11: 0000000000000000 R12: 00000000000002c1
R13: 0000000000000043 R14: ffff88807e9d7ac0 R15: dffffc0000000000
FS:  00007f31c4a33700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f31c4b0e5a4 CR3: 000000001d68d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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