kernel BUG at mm/internal.h:LINE! (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 509a1542 Merge tag '5.10-rc6-smb3-fixes' of git://git.samb..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=123d9a55500000
kernel config: https://syzkaller.appspot.com/x/.config?x=e49433cfed49b7d9
dashboard link: https://syzkaller.appspot.com/bug?extid=9e1bcf66d5e11d021793
compiler: gcc (GCC) 10.1.0-syz 20200507

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+9e1bcf...@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at mm/internal.h:400!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 28126 Comm: kworker/u4:0 Not tainted 5.10.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:vma_address mm/internal.h:400 [inline]
RIP: 0010:vma_address mm/internal.h:392 [inline]
RIP: 0010:rmap_walk_file+0x6b4/0xbf0 mm/rmap.c:1923
Code: f8 06 48 01 44 24 18 e9 1b fb ff ff e8 25 1c ca ff 4c 8d bb 00 f0 1f 00 e9 92 fd ff ff e8 14 1c ca ff 4c 89 e7 e8 95 bb 07 07 <0f> 0b e8 05 1c ca ff 48 8b 44 24 10 4c 8d 68 78 4c 89 ef e8 f4 a5
RSP: 0018:ffffc9001656efb8 EFLAGS: 00010283
RAX: 0000000000000154 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880702f8000 RSI: ffffffff8158c855 RDI: fffff52002caddd2
RBP: ffffea00014ef380 R08: 0000000000000154 R09: ffff8880b9e30627
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888000129318
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052df4c CR3: 000000016e143000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rmap_walk+0x105/0x190 mm/rmap.c:1948
page_mkclean+0x21c/0x2b0 mm/rmap.c:998
clear_page_dirty_for_io+0x318/0xbe0 mm/page-writeback.c:2698
mpage_submit_page+0x80/0x2c0 fs/ext4/inode.c:2072
mpage_process_page_bufs+0x656/0x780 fs/ext4/inode.c:2206
mpage_prepare_extent_to_map+0x904/0xe00 fs/ext4/inode.c:2618
ext4_writepages+0x95f/0x38a0 fs/ext4/inode.c:2746
do_writepages+0xec/0x290 mm/page-writeback.c:2352
__writeback_single_inode+0x122/0x1180 fs/fs-writeback.c:1461
writeback_sb_inodes+0x53d/0xef0 fs/fs-writeback.c:1721
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1790
wb_writeback+0x814/0xc40 fs/fs-writeback.c:1896
wb_check_old_data_flush fs/fs-writeback.c:1998 [inline]
wb_do_writeback fs/fs-writeback.c:2051 [inline]
wb_workfn+0x891/0x12d0 fs/fs-writeback.c:2080
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace 5d185e0c163f88c9 ]---
RIP: 0010:vma_address mm/internal.h:400 [inline]
RIP: 0010:vma_address mm/internal.h:392 [inline]
RIP: 0010:rmap_walk_file+0x6b4/0xbf0 mm/rmap.c:1923
Code: f8 06 48 01 44 24 18 e9 1b fb ff ff e8 25 1c ca ff 4c 8d bb 00 f0 1f 00 e9 92 fd ff ff e8 14 1c ca ff 4c 89 e7 e8 95 bb 07 07 <0f> 0b e8 05 1c ca ff 48 8b 44 24 10 4c 8d 68 78 4c 89 ef e8 f4 a5
RSP: 0018:ffffc9001656efb8 EFLAGS: 00010283
RAX: 0000000000000154 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880702f8000 RSI: ffffffff8158c855 RDI: fffff52002caddd2
RBP: ffffea00014ef380 R08: 0000000000000154 R09: ffff8880b9e30627
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888000129318
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000749138 CR3: 0000000013a93000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.