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Date: Tue, 30 Apr 2024 03:04:27 -0700
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Subject: [syzbot] [f2fs?] kernel BUG in f2fs_write_inline_data
From: syzbot <syzbot+848062ba19c8782ca5c8@syzkaller.appspotmail.com>
To: chao@kernel.org, jaegeuk@kernel.org, 
	linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, 
	linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    9e4bc4bcae01 Merge tag 'nfs-for-6.9-2' of git://git.linux-..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10937af8980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3714fc09f933e505
dashboard link: https://syzkaller.appspot.com/bug?extid=848062ba19c8782ca5c8
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b98a742ff5ed/disk-9e4bc4bc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/207a8191df7c/vmlinux-9e4bc4bc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7dd86c3ad0ba/bzImage-9e4bc4bc.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+848062ba19c8782ca5c8@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/f2fs/inline.c:258!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c e3 fc ff ff 48 89 df e8 6f a5 0b fe e9 d6 fc ff ff e8 25 33 91 07 e8 f0 05 a7 fd 90 <0f> 0b e8 e8 05 a7 fd 90 0f 0b 0f 1f 44 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc90000aa68e0 EFLAGS: 00010293
RAX: ffffffff83ef09c0 RBX: 0000000000000001 RCX: ffff888017ebbc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000aa6a10 R08: ffffffff83ef0485 R09: 1ffff1100c270ef5
R10: dffffc0000000000 R11: ffffed100c270ef6 R12: ffffc90000aa6968
R13: 1ffff1100c270ef5 R14: ffffc90000aa6960 R15: ffffc90000aa6970
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5425ff000 CR3: 000000000e134000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834
 f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline]
 __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline]
 f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315
 do_writepages+0x35b/0x870 mm/page-writeback.c:2612
 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650
 writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941
 wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117
 wb_do_writeback fs/fs-writeback.c:2264 [inline]
 wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
 kthread+0x2f2/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c e3 fc ff ff 48 89 df e8 6f a5 0b fe e9 d6 fc ff ff e8 25 33 91 07 e8 f0 05 a7 fd 90 <0f> 0b e8 e8 05 a7 fd 90 0f 0b 0f 1f 44 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc90000aa68e0 EFLAGS: 00010293
RAX: ffffffff83ef09c0 RBX: 0000000000000001 RCX: ffff888017ebbc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000aa6a10 R08: ffffffff83ef0485 R09: 1ffff1100c270ef5
R10: dffffc0000000000 R11: ffffed100c270ef6 R12: ffffc90000aa6968
R13: 1ffff1100c270ef5 R14: ffffc90000aa6960 R15: ffffc90000aa6970
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e628000 CR3: 0000000049462000 CR4: 0000000000350ef0


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