[syzbot] [f2fs?] kernel BUG in f2fs_vm_page_mkwrite

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 83814698cf48 Merge tag 'powerpc-6.10-2' of git://git.kerne..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15cb1a16980000
kernel config: https://syzkaller.appspot.com/x/.config?x=238430243a58f702
dashboard link: https://syzkaller.appspot.com/bug?extid=f195123a45ad487ca66c
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1129d362980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d4ce06980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/49e438bd237c/disk-83814698.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cc25a0ccc6f6/vmlinux-83814698.xz
kernel image: https://storage.googleapis.com/syzbot-assets/85871c08ab8f/bzImage-83814698.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/cc6db24192e2/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f19512...@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/f2fs/file.c:105!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 5092 Comm: syz-executor296 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:f2fs_vm_page_mkwrite+0x1679/0x1bb0 fs/f2fs/file.c:105
Code: e7 41 83 e7 01 4c 89 fe e8 84 39 c8 fd 4d 85 ff 0f 84 f6 f8 ff ff e8 46 3e c8 fd 49 83 ec 01 e9 eb f8 ff ff e8 38 3e c8 fd 90 <0f> 0b e8 30 3e c8 fd e8 5b 0a 3b fd e9 f0 f1 ff ff 48 89 4c 24 08
RSP: 0018:ffffc9000316f828 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88807aa48000 RCX: ffffffff83c58900
RDX: ffff8880123a0000 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc9000316fb68 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff9393ffd0 R12: ffffc9000316f8a8
R13: 0000000000000001 R14: ffffea00013dfbc0 R15: ffff88807aa484a8
FS: 0000555581924380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 00000000791d4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_page_mkwrite+0x17d/0x390 mm/memory.c:3099
wp_page_shared mm/memory.c:3501 [inline]
do_wp_page+0xc89/0x3380 mm/memory.c:3651
handle_pte_fault mm/memory.c:5396 [inline]
__handle_mm_fault+0x2311/0x53f0 mm/memory.c:5523
handle_mm_fault+0x476/0xa00 mm/memory.c:5688
do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc9000316fdd8 EFLAGS: 00050212
RAX: 00000000665cff9a RBX: 0000000000000010 RCX: 0000000000000010
RDX: fffff5200062dfc8 RSI: ffffc9000316fe30 RDI: 0000000020000280
RBP: 0000000020000280 R08: 0000000000000000 R09: fffff5200062dfc7
R10: ffffc9000316fe3f R11: 0000000000000000 R12: ffffc9000316fe30
R13: 0000000020000290 R14: 0000000000000000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
_copy_to_user lib/usercopy.c:46 [inline]
_copy_to_user+0xac/0xc0 lib/usercopy.c:39
copy_to_user include/linux/uaccess.h:191 [inline]
put_timespec64+0xb6/0x120 kernel/time/time.c:910
__do_sys_clock_gettime kernel/time/posix-timers.c:1144 [inline]
__se_sys_clock_gettime kernel/time/posix-timers.c:1132 [inline]
__x64_sys_clock_gettime+0x1d5/0x270 kernel/time/posix-timers.c:1132
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feea661dc19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007ffeab229a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feea661dc19
RDX: 00007feea661dc19 RSI: 0000000020000280 RDI: 0000000000000000
RBP: 00007feea66965f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffeab229a70
R13: 00007ffeab229c98 R14: 431bde82d7b634db R15: 00007feea666603b
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_vm_page_mkwrite+0x1679/0x1bb0 fs/f2fs/file.c:105
Code: e7 41 83 e7 01 4c 89 fe e8 84 39 c8 fd 4d 85 ff 0f 84 f6 f8 ff ff e8 46 3e c8 fd 49 83 ec 01 e9 eb f8 ff ff e8 38 3e c8 fd 90 <0f> 0b e8 30 3e c8 fd e8 5b 0a 3b fd e9 f0 f1 ff ff 48 89 4c 24 08
RSP: 0018:ffffc9000316f828 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88807aa48000 RCX: ffffffff83c58900
RDX: ffff8880123a0000 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc9000316fb68 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff9393ffd0 R12: ffffc9000316f8a8
R13: 0000000000000001 R14: ffffea00013dfbc0 R15: ffff88807aa484a8
FS: 0000555581924380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 00000000791d4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 40 83 f9 08 rex cmp $0x8,%ecx
4: 73 21 jae 0x27
6: 85 c9 test %ecx,%ecx
8: 74 0f je 0x19
a: 8a 06 mov (%rsi),%al
c: 88 07 mov %al,(%rdi)
e: 48 ff c7 inc %rdi
11: 48 ff c6 inc %rsi
14: 48 ff c9 dec %rcx
17: 75 f1 jne 0xa
19: c3 ret
1a: cc int3
1b: cc int3
1c: cc int3
1d: cc int3
1e: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
25: 00 00
27: 48 8b 06 mov (%rsi),%rax
* 2a: 48 89 07 mov %rax,(%rdi) <-- trapping instruction
2d: 48 83 c6 08 add $0x8,%rsi
31: 48 83 c7 08 add $0x8,%rdi
35: 83 e9 08 sub $0x8,%ecx
38: 74 df je 0x19
3a: 83 f9 08 cmp $0x8,%ecx
3d: 73 e8 jae 0x27
3f: eb .byte 0xeb


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