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

Status: upstream: reported C repro on 2024/11/26 15:40
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+b974bd41515f770c608b@syzkaller.appspotmail.com
First crash: 130d, last: 1d12h
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH RESEND] jfs: fix array-index-out-of-bounds read in add_missing_indices 2 (2) 2025/04/01 19:34
[PATCH] jfs: fix array-index-out-of-bounds read in add_missing_indices 1 (1) 2025/03/25 11:43
[syzbot] [jfs?] UBSAN: array-index-out-of-bounds in add_missing_indices 3 (8) 2025/03/22 13:36
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 UBSAN: array-index-out-of-bounds in add_missing_indices origin:upstream C error 5 59d 78d 0/3 upstream: reported C repro on 2025/01/13 05:49
linux-5.15 UBSAN: array-index-out-of-bounds in add_missing_indices origin:upstream C 5 24d 58d 0/3 upstream: reported C repro on 2025/02/02 08:00
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/03/22 13:03 23m duttaditya18@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/03/22 12:23 20m duttaditya18@gmail.com patch linux-next report log
2025/03/22 09:37 25m duttaditya18@gmail.com patch https://github.com/kleikamp/linux-shaggy.git jfs-next error

Sample crash report:
 ... Log Wrap ... Log Wrap ... Log Wrap ...
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:2649:28
index -128 is out of range for type 'struct dtslot[128]'
CPU: 1 UID: 0 PID: 6414 Comm: syz-executor126 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0xf8/0x148 lib/ubsan.c:429
 add_missing_indices+0x6e4/0xa8c fs/jfs/jfs_dtree.c:2649
 jfs_readdir+0x18ac/0x3030 fs/jfs/jfs_dtree.c:3019
 wrap_directory_iterator+0xa8/0xf4 fs/readdir.c:65
 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540
 iterate_dir+0x408/0x648 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64 fs/readdir.c:389 [inline]
 __arm64_sys_getdents64+0x1c0/0x490 fs/readdir.c:389
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
---[ end trace ]---
==================================================================
BUG: KASAN: slab-out-of-bounds in diWrite+0xb48/0x15cc fs/jfs/jfs_imap.c:753
Read of size 32 at addr ffff0000dea84108 by task syz-executor126/6414

CPU: 1 UID: 0 PID: 6414 Comm: syz-executor126 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:489
 kasan_report+0xd8/0x138 mm/kasan/report.c:602
 kasan_check_range+0x268/0x2a8 mm/kasan/generic.c:189
 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105
 diWrite+0xb48/0x15cc fs/jfs/jfs_imap.c:753
 txCommit+0x750/0x5504 fs/jfs/jfs_txnmgr.c:1255
 add_missing_indices+0x760/0xa8c fs/jfs/jfs_dtree.c:2663
 jfs_readdir+0x18ac/0x3030 fs/jfs/jfs_dtree.c:3019
 wrap_directory_iterator+0xa8/0xf4 fs/readdir.c:65
 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540
 iterate_dir+0x408/0x648 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64 fs/readdir.c:389 [inline]
 __arm64_sys_getdents64+0x1c0/0x490 fs/readdir.c:389
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the object at ffff0000dea84088
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 128 bytes inside of
 allocated 2232-byte region [ffff0000dea84088, ffff0000dea84940)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ea80
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c486ec80 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000001f5000000 0000000000000000
head: 05ffc00000000040 ffff0000c486ec80 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000001f5000000 0000000000000000
head: 05ffc00000000003 fffffdffc37aa001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000dea84000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000dea84080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000dea84100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff0000dea84180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000dea84200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

 ... Log Wrap ... Log Wrap ... Log Wrap ...


 ... Log Wrap ... Log Wrap ... Log Wrap ...


 ... Log Wrap ... Log Wrap ... Log Wrap ...

ERROR: (device loop0): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0

ERROR: (device loop0): remounting filesystem as read-only
JFS: Invalid stbl[1] = -128 for inode 2, block = 0

Crashes (127):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/21 20:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1950a0af2d55 6e87cfa2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/26 17:52 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/26 14:23 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/26 08:53 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/26 00:12 upstream 2df0c02dab82 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/20 08:57 upstream a7f2e10ecd8f 9209bc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/15 21:26 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/14 18:25 upstream 695caca9345a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/04 21:04 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/04 00:13 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/22 18:28 upstream ff202c5028a1 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/21 01:36 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/08 13:37 upstream 8f6629c004b1 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/08 08:18 upstream 7ee983c850b4 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/07 16:57 upstream bb066fe812d6 53657d1b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/06 11:32 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/04 01:59 upstream 0de63bb7d919 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/03 05:07 upstream 69b8923f5003 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/26 14:46 upstream aa22f4da2a46 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/19 00:26 upstream fda5e3f28400 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/17 13:25 upstream 9bffa1ad25b8 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/09 06:11 upstream 0b7958fa05d5 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root UBSAN: array-index-out-of-bounds in add_missing_indices
2024/11/22 15:34 upstream 28eb75e178d3 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/26 23:46 upstream 1e26c5e28ca5 19e40f48 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/14 05:15 upstream 4003c9e78778 e2826670 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/14 00:08 upstream 4003c9e78778 e2826670 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/13 11:06 upstream b7f94fcf5546 44be8b44 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/07 15:00 upstream 00a7d39898c8 7e3bd60d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/06 01:13 upstream cfced12f5100 034534df .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/04 12:41 upstream 99fa936e8e4f c3901742 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/02 08:31 upstream ece144f151ac c3901742 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/26 11:38 upstream ac9c34d1e45a d34966d1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/24 23:36 upstream d082ecbc71e9 d34966d1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/13 15:38 upstream 4dc1d1bec898 7320a65f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/12 21:06 upstream 09fbf3d50205 b27c2402 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/12 17:56 upstream 09fbf3d50205 b27c2402 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/05 10:26 upstream 5c8c229261f1 5896748e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/03 14:18 upstream 2014c95afece a21a8419 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/02 12:43 upstream 69e858e0b8b2 568559e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/16 01:25 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/04 09:46 linux-next 8155b4ef3466 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/31 16:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/25 14:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/19 01:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5737d35364f 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/08 16:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 77c95b8c7a16 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/03 21:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/03/03 16:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/28 08:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 017f704fbfb1 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/13 21:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a64dcfb451e2 2afad16e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/13 21:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a64dcfb451e2 2afad16e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/02/10 02:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2014c95afece ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/26 22:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1950a0af2d55 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
2025/01/21 17:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1950a0af2d55 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: array-index-out-of-bounds in add_missing_indices
* Struck through repros no longer work on HEAD.