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UBSAN: array-index-out-of-bounds in read_inline_xattr

Status: upstream: reported C repro on 2024/12/03 18:31
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+69f5379a1717a0b982a1@syzkaller.appspotmail.com
First crash: 49d, last: 2d22h
Cause bisection: introduced by (bisect log) :
commit 388a2a0640e16a8887f0d47dab207f344fbdb913
Author: Chao Yu <chao@kernel.org>
Date: Thu Jun 6 09:55:51 2024 +0000

  f2fs: remove redundant sanity check in sanity_check_inode()

Crash: UBSAN: array-index-out-of-bounds in f2fs_getxattr (log)
Repro: C syz .config
  
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH v2] f2fs: fix to do sanity check correctly on i_inline_xattr_size 2 (2) 2025/01/17 21:10
[PATCH] f2fs: fix to do sanity check correctly on i_inline_xattr_size 4 (4) 2025/01/13 18:46
[syzbot] [f2fs?] UBSAN: array-index-out-of-bounds in read_inline_xattr 2 (7) 2024/12/26 15:02
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/12/26 14:02 24m chao@kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip OK log
2024/12/23 14:13 1h20m chao@kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip error

Sample crash report:
F2FS-fs (loop0): Failed to enable quota tracking (type=1, err=-22). Please run fsck to fix.
F2FS-fs (loop0): Cannot turn on quotas: error -22
F2FS-fs (loop0): Mounted with checkpoint version = 1b41e954
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/f2fs/f2fs.h:3292:19
index 18446744073709500059 is out of range for type '__le32[923]' (aka 'unsigned int[923]')
CPU: 1 UID: 0 PID: 5819 Comm: syz-executor309 Not tainted 6.13.0-rc3-syzkaller-00301-gbcde95ce32b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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+0x433/0x470 fs/xattr.c:423
 smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:306
 smack_d_instantiate+0x749/0xa50 security/smack/smack_lsm.c:3615
 security_d_instantiate+0x107/0x1f0 security/security.c:4070
 d_splice_alias+0x6f/0x330 fs/dcache.c:3001
 f2fs_lookup+0x4ff/0x820 fs/f2fs/namei.c:523
 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
 filename_create+0x297/0x540 fs/namei.c:4081
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4326
 __do_sys_mkdir fs/namei.c:4354 [inline]
 __se_sys_mkdir fs/namei.c:4352 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4352
 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: 0033:0x7fdaa8e2f717
Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 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:00007ffe117c86e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdaa8e2f717
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000180
RBP: 0000000020000180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe117c8780 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
---[ end trace ]---

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/22 19:36 upstream bcde95ce32b6 b4fbdbd4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/22 19:13 upstream bcde95ce32b6 b4fbdbd4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs UBSAN: array-index-out-of-bounds in read_inline_xattr
2025/01/15 08:14 upstream c3812b15000c 7315a7cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2025/01/13 06:08 upstream be548645527a 6dbc6a9b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2025/01/12 19:08 upstream b62cef9a5c67 6dbc6a9b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2025/01/02 08:04 upstream 56e6a3499e14 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/31 13:00 upstream ccb98ccef0e5 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/30 20:16 upstream fc033cf25e61 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/30 12:44 upstream fc033cf25e61 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/29 09:42 upstream 059dd502b263 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/29 05:57 upstream 059dd502b263 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/26 12:44 upstream 9b2ffa6148b1 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/25 14:30 upstream 9b2ffa6148b1 444551c4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/23 05:29 upstream bcde95ce32b6 b4fbdbd4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/20 12:45 upstream 8faabc041a00 49cfeac8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/12/15 11:06 upstream 2d8308bf5b67 7cbfbb3a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
2024/11/29 19:34 upstream 7af08b57bcb9 b5d2be89 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in read_inline_xattr
* Struck through repros no longer work on HEAD.