[f2fs-dev] [syzbot] [f2fs?] UBSAN: array-index-out-of-bounds in read_inline_xattr

[syzbot <syzbot+69f5379a1717a0b982a1@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    7af08b57bcb9 Merge tag 'trace-v6.13-2' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1519f3c0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3891b550f14aea0f
dashboard link: https://syzkaller.appspot.com/bug?extid=69f5379a1717a0b982a1
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 (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-7af08b57.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/63d6781734c3/vmlinux-7af08b57.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f3bd17982594/bzImage-7af08b57.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+69f5379a1717a0b982a1@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 131072
F2FS-fs (loop0): Invalid Fs Meta Ino: node(13) meta(0) root(3)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Try to recover 2th superblock, ret: 0
F2FS-fs (loop0): Mounted with checkpoint version = 1b41e955
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/f2fs/f2fs.h:3292:19
index 18446744073709550491 is out of range for type '__le32[923]' (aka 'unsigned int[923]')
CPU: 0 UID: 0 PID: 5338 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-10689-g7af08b57bcb9 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429
 read_inline_xattr+0x273/0x280
 lookup_all_xattrs fs/f2fs/xattr.c:341 [inline]
 f2fs_getxattr+0x57b/0x13b0 fs/f2fs/xattr.c:533
 vfs_getxattr_alloc+0x472/0x5c0 fs/xattr.c:393
 ima_read_xattr+0x38/0x60 security/integrity/ima/ima_appraise.c:229
 process_measurement+0x117a/0x1fb0 security/integrity/ima/ima_main.c:353
 ima_file_check+0xd9/0x120 security/integrity/ima/ima_main.c:572
 security_file_post_open+0xb9/0x280 security/security.c:3121
 do_open fs/namei.c:3830 [inline]
 path_openat+0x2ccd/0x3590 fs/namei.c:3987
 do_file_open_root+0x3a7/0x720 fs/namei.c:4039
 file_open_root+0x247/0x2a0 fs/open.c:1382
 do_handle_open+0x85b/0x9d0 fs/fhandle.c:414
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a4bf80849
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4a4cd52058 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f4a4c145fa0 RCX: 00007f4a4bf80849
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f4a4bff3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4a4c145fa0 R15: 00007ffd9526f5d8
 </TASK>
---[ end trace ]---


---
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