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

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Message-ID: <00000000000063ec4705f9513d4f@google.com>
Date:   Fri, 14 Apr 2023 12:56:41 -0700
From:   syzbot <syzbot+78c74557d14e8d51e013@...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 unmap_page_range

Hello,

syzbot found the following issue on:

HEAD commit:    e134c93f788f Add linux-next specific files for 20230406
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13b57c17c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a0548c6ce6e9842
dashboard link: https://syzkaller.appspot.com/bug?extid=78c74557d14e8d51e013
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/b617d686938d/disk-e134c93f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3ac3406cd427/vmlinux-e134c93f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6b08a19acadb/bzImage-e134c93f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+78c74557d14e8d51e013@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 24899 at mm/memory.c:1491 zap_pte_range mm/memory.c:1491 [inline]
WARNING: CPU: 1 PID: 24899 at mm/memory.c:1491 zap_pmd_range mm/memory.c:1564 [inline]
WARNING: CPU: 1 PID: 24899 at mm/memory.c:1491 zap_pud_range mm/memory.c:1593 [inline]
WARNING: CPU: 1 PID: 24899 at mm/memory.c:1491 zap_p4d_range mm/memory.c:1614 [inline]
WARNING: CPU: 1 PID: 24899 at mm/memory.c:1491 unmap_page_range+0x1c07/0x39b0 mm/memory.c:1635
Modules linked in:
CPU: 1 PID: 24899 Comm: syz-executor.0 Not tainted 6.3.0-rc5-next-20230406-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:zap_pte_range mm/memory.c:1491 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1564 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1593 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1614 [inline]
RIP: 0010:unmap_page_range+0x1c07/0x39b0 mm/memory.c:1635
Code: 83 fb 02 0f 86 ff 0c 00 00 e8 85 4b c2 ff 44 89 e6 bf 1f 00 00 00 e8 98 47 c2 ff 41 83 fc 1f 0f 84 38 0e 00 00 e8 69 4b c2 ff <0f> 0b e9 da ef ff ff e8 5d 4b c2 ff 4c 89 e5 31 ff 4c 89 e3 81 e5
RSP: 0018:ffffc90004ef76f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000000
RDX: ffff8880829f0000 RSI: ffffffff81c10c67 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001f
R13: 0000000020679000 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33523000 CR3: 000000007b6c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unmap_single_vma+0x19a/0x2b0 mm/memory.c:1681
 unmap_vmas+0x234/0x380 mm/memory.c:1720
 exit_mmap+0x190/0x930 mm/mmap.c:3063
 __mmput+0x13a/0x540 kernel/fork.c:1344
 mmput+0x60/0x70 kernel/fork.c:1366
 exit_mm kernel/exit.c:564 [inline]
 do_exit+0x9d7/0x29f0 kernel/exit.c:858
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
 get_signal+0x2315/0x25b0 kernel/signal.c:2859
 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:307
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f80caa8c169
Code: Unable to access opcode bytes at 0x7f80caa8c13f.
RSP: 002b:00007f80c95fe218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f80cababf88 RCX: 00007f80caa8c169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f80cababf88
RBP: 00007f80cababf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f80cababf8c
R13: 00007ffc884fac6f R14: 00007f80c95fe300 R15: 0000000000022000
 </TASK>


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