syzbot


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

Status: upstream: reported C repro on 2024/04/28 12:32
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+77ed0aca57849509422b@syzkaller.appspotmail.com
First crash: 294d, last: 11d
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2025/01/20 upstream (ToT) ffd294d346d1 C [report] UBSAN: array-index-out-of-bounds in dtReadFirst
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 UBSAN: array-index-out-of-bounds in dtReadFirst origin:lts-only C 16 11d 83d 0/3 upstream: reported C repro on 2024/11/25 10:09
upstream UBSAN: array-index-out-of-bounds in dtReadFirst jfs C error 200 63d 291d 28/28 fixed on 2024/12/16 09:50
upstream UBSAN: array-index-out-of-bounds in dtReadFirst (2) jfs C error 42 11m 57d 0/28 upstream: reported C repro on 2024/12/21 07:08
Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/02/03 04:50 18m retest repro linux-5.15.y report log
2024/12/31 03:15 1h18m retest repro linux-5.15.y OK log
2024/12/31 03:15 20m retest repro linux-5.15.y OK log
2024/10/20 07:51 15m retest repro linux-5.15.y report log
2024/10/20 07:51 11m retest repro linux-5.15.y report log

Sample crash report:
metapage_write_end_io: I/O error
blkno = 8ed2c, nblocks = 1
ERROR: (device loop0): dbUpdatePMap: blocks are outside the map
ERROR: (device loop0): remounting filesystem as read-only
blkno = 8ed2c, nblocks = 1
ERROR: (device loop0): dbUpdatePMap: blocks are outside the map
UFO tlock:0xffffc900027c2090
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:3392:10
index 237 is out of range for type 'struct dtslot[128]'
CPU: 0 PID: 4162 Comm: syz-executor278 Not tainted 5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0x118/0x140 lib/ubsan.c:282
 dtReadFirst+0x622/0xc40 fs/jfs/jfs_dtree.c:3392
 dtReadNext fs/jfs/jfs_dtree.c:3443 [inline]
 jfs_readdir+0x9a4/0x3bc0 fs/jfs/jfs_dtree.c:3158
 iterate_dir+0x224/0x570
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f674b6c0c39
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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:00007fff9a98fd48 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fff9a98fd50 RCX: 00007f674b6c0c39
RDX: 0000000000000ff9 RSI: 0000000020001280 RDI: 0000000000000004
RBP: 00007fff9a98fd58 R08: 00007f674b68cbc0 R09: 00007f674b68cbc0
R10: 00007fff9a98fd58 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9a98ffb8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
================================================================================

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/20 03:34 linux-5.15.y 4735586da88e f2cb035c .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in dtReadFirst
2025/01/20 03:09 linux-5.15.y 4735586da88e f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in dtReadFirst
2024/12/01 23:23 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in dtReadFirst
2024/12/01 23:21 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in dtReadFirst
2024/11/26 05:26 linux-5.15.y 0a51d2d4527b 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in dtReadFirst
2024/12/01 23:13 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/12/01 23:11 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/11/26 03:48 linux-5.15.y 0a51d2d4527b 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/11/26 03:48 linux-5.15.y 0a51d2d4527b 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/10/05 21:53 linux-5.15.y 3a5928702e71 d7906eff .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/10/05 21:22 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/05/27 23:22 linux-5.15.y c61bd26ae81a 761766e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/05/27 22:08 linux-5.15.y c61bd26ae81a 761766e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/05/12 13:01 linux-5.15.y 284087d4f7d5 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/04/28 13:09 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2024/04/28 12:31 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in dtReadFirst
2025/02/05 10:19 linux-5.15.y c16c81c81336 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Read in dtReadFirst
2025/02/05 03:49 linux-5.15.y c16c81c81336 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Read in dtReadFirst
* Struck through repros no longer work on HEAD.