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UBSAN: shift-out-of-bounds in dbSplit

Status: upstream: reported C repro on 2024/04/15 22:09
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+eac84ce8b38992ca3441@syzkaller.appspotmail.com
First crash: 303d, last: 30d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/12/23 upstream (ToT) 4bbf9020becb C [report] UBSAN: shift-out-of-bounds in dbSplit
2025/02/06 upstream (ToT) 92514ef226f5 C Failed due to an error; will retry later
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 UBSAN: shift-out-of-bounds in dbSplit C done 18 86d 303d 3/3 fixed on 2025/01/09 09:39
upstream UBSAN: shift-out-of-bounds in dbSplit (2) jfs C error 403 72d 317d 28/28 fixed on 2024/12/16 09:50
upstream UBSAN: shift-out-of-bounds in dbSplit jfs C error done 7 409d 863d 25/28 fixed on 2024/02/09 18:10
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/01/14 15:32 12m retest repro linux-5.15.y report log
2024/12/11 05:55 16m retest repro linux-5.15.y report log
2024/11/05 14:20 10m retest repro linux-5.15.y report log
2024/10/01 22:04 14m retest repro linux-5.15.y report log
2024/10/01 22:04 13m retest repro linux-5.15.y report log

Sample crash report:
loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:2707:11
shift exponent 121 is too large for 32-bit type 'int'
CPU: 1 PID: 3566 Comm: syz-executor278 Not tainted 5.15.168-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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_shift_out_of_bounds+0x3bf/0x420 lib/ubsan.c:321
 dbSplit+0x21a/0x220 fs/jfs/jfs_dmap.c:2707
 dbAllocBits+0x4e5/0x9a0 fs/jfs/jfs_dmap.c:2259
 dbAllocDmap fs/jfs/jfs_dmap.c:2100 [inline]
 dbAllocDmapLev+0x24c/0x490 fs/jfs/jfs_dmap.c:2054
 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1891
 dbAllocAG+0x28b/0x10b0 fs/jfs/jfs_dmap.c:1432
 dbAlloc+0x654/0xc90 fs/jfs/jfs_dmap.c:888
 dtSplitUp fs/jfs/jfs_dtree.c:979 [inline]
 dtInsert+0xda3/0x6b00 fs/jfs/jfs_dtree.c:868
 jfs_create+0x7b2/0xbb0 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x130a/0x2f20 fs/namei.c:3739
 do_filp_open+0x21c/0x460 fs/namei.c:3769
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_open fs/open.c:1277 [inline]
 __se_sys_open fs/open.c:1273 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1273
 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: 0033:0x7f93e6dd79b9
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:00007ffe732f7508 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffe732f76e8 RCX: 00007f93e6dd79b9
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000020000400
RBP: 00007f93e6e50610 R08: 00000000000060cc R09: 0000000000000000
R10: 00007ffe732f73d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe732f76d8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
================================================================================

Crashes (36):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/21 04:34 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in dbSplit
2024/04/15 22:48 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 08:29 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in dbSplit
2024/04/15 22:23 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in dbSplit
2024/04/15 22:08 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in dbSplit
2024/05/03 01:22 linux-5.15.y 284087d4f7d5 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/05/02 23:40 linux-5.15.y 284087d4f7d5 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/05/02 17:23 linux-5.15.y 284087d4f7d5 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/05/02 17:23 linux-5.15.y 284087d4f7d5 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/05/01 02:09 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/05/01 02:08 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 16:39 linux-5.15.y b925f60c6ee7 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 16:36 linux-5.15.y b925f60c6ee7 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 16:36 linux-5.15.y b925f60c6ee7 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 09:55 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 09:55 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/30 08:38 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 18:49 linux-5.15.y c52b9710c83d acc528cb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 11:13 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 11:13 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 11:13 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 10:29 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 10:29 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 10:29 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/17 02:16 linux-5.15.y fa3df276cd36 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 17:44 linux-5.15.y fa3df276cd36 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 17:44 linux-5.15.y fa3df276cd36 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 13:23 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 08:47 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 07:26 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 03:49 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 03:49 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 03:49 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 00:32 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/16 00:32 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
2024/04/15 22:09 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in dbSplit
* Struck through repros no longer work on HEAD.