linux-kernel - [syzbot] [mm?] WARNING in validate

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Message-ID: <000000000000dc3ea105ffc50d00@google.com>
Date:   Wed, 05 Jul 2023 15:38:09 -0700
From:   syzbot <syzbot+a85a0b4b0f39dca529a5@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [mm?] WARNING in validate_mm

Hello,

syzbot found the following issue on:

HEAD commit:    a901a3568fd2 Merge tag 'iomap-6.5-merge-1' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14aeea08a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d787595a482d6a43
dashboard link: https://syzkaller.appspot.com/bug?extid=a85a0b4b0f39dca529a5
compiler:       Debian clang version 15.0.7, 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/9f5f0447f626/disk-a901a356.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/500177760bfb/vmlinux-a901a356.xz
kernel image: https://storage.googleapis.com/syzbot-assets/82352cc74fb3/bzImage-a901a356.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a85a0b4b0f39dca529a5@...kaller.appspotmail.com

owner ffff88807cee5940 exe_file ffff888028ce6f00
notifier_subscriptions 0000000000000000
numa_next_scan 4295297648 numa_scan_offset 0 numa_scan_seq 0
tlb_flush_pending 1
def_flags: 0x0()
------------[ cut here ]------------
WARNING: CPU: 0 PID: 18358 at mm/mmap.c:314 validate_mm+0x42a/0x500 mm/mmap.c:314
Modules linked in:
CPU: 0 PID: 18358 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:validate_mm+0x42a/0x500 mm/mmap.c:314
Code: 28 e8 5a 98 fa ff c6 05 96 e3 b0 0c 01 0f 0b e9 09 fe ff ff e8 77 e1 b9 ff 48 8b 7c 24 28 e8 3d 98 fa ff c6 05 7a e3 b0 0c 01 <0f> 0b e9 46 ff ff ff e8 5a e1 b9 ff 44 8b 74 24 1c eb 08 e8 4e e1
RSP: 0018:ffffc90006a279a0 EFLAGS: 00010282
RAX: 0000000000000330 RBX: 0000000000000000 RCX: 3ddfd82186994a00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90006a27ad0 R08: ffffffff816f481c R09: 1ffff92000d44e5c
R10: dffffc0000000000 R11: fffff52000d44e5d R12: dffffc0000000000
R13: ffffc90006a27a20 R14: ffff888024681500 R15: 00007f2d1ec14000
FS:  00007f2d1ec97700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f690424b000 CR3: 000000001ebc5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_vmi_align_munmap+0x13b1/0x15c0 mm/mmap.c:2561
 do_vmi_munmap+0x24d/0x2d0 mm/mmap.c:2619
 __vm_munmap+0x230/0x450 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x69/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2d1de8c467
Code: 00 00 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb 85 66 2e 0f 1f 84 00 00 00 00 00 90 b8 0b 00 00 00 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:00007f2d1ec96f38 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f2d1de8c467
RDX: 0000000000010000 RSI: 0000000000010000 RDI: 00007f2d145ff000
RBP: 00007f2d145ff000 R08: 0000000000000000 R09: 000000000000028b
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d1ec96fdc R14: 00007f2d1ec96fe0 R15: 0000000020000382
 </TASK>


---
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@...glegroups.com.

syzbot will keep track of this issue. See:
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If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to change bug's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup