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UBSAN: shift-out-of-bounds in ocfs2_fill_super

Status: upstream: reported C repro on 2024/09/30 21:30
Bug presence: origin:lts-only
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+c6104ecfe56e0fd6b616@syzkaller.appspotmail.com
First crash: 393d, last: 3d02h
Fix commit to backport (bisect log) :
tree: upstream
commit 7f86b2942791012ac7b4c481d1f84a58fd2fbcfc
Author: qasdev <qasdev00@gmail.com>
Date: Tue Aug 20 01:22:09 2024 +0000

  ocfs2: fix shift-out-of-bounds UBSAN bug in ocfs2_verify_volume()

  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/01/20 linux-5.15.y (ToT) 4735586da88e C [report] UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/20 upstream (ToT) 100ceb4817a2 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: shift-out-of-bounds in ocfs2_fill_super ocfs2 -1 C 199 372d 439d 28/29 fixed on 2024/10/22 11:56
linux-6.6 UBSAN: shift-out-of-bounds in ocfs2_fill_super origin:lts-only -1 C inconclusive 5 52d 92d 0/2 upstream: reported C repro on 2025/07/29 03:00
upstream UBSAN: shift-out-of-bounds in ocfs2_fill_super (2) ocfs2 -1 C 81 346d 367d 28/29 fixed on 2024/12/16 09:50
linux-6.1 UBSAN: shift-out-of-bounds in ocfs2_fill_super origin:lts-only -1 C inconclusive 64 3h52m 367d 0/3 upstream: reported C repro on 2024/10/27 03:28
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/10/26 06:21 22m retest repro linux-5.15.y report log
2025/10/26 06:21 10m retest repro linux-5.15.y report log
2025/09/05 01:14 9m retest repro linux-5.15.y report log
2025/08/15 12:03 16m retest repro linux-5.15.y report log
2025/06/26 19:09 10m retest repro linux-5.15.y report log
2025/06/01 07:04 12m retest repro linux-5.15.y report log
2025/04/17 01:33 10m retest repro linux-5.15.y report log
2025/02/15 00:25 21m retest repro linux-5.15.y OK log
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2025/02/21 05:02 6h25m fix candidate upstream OK (1) job log
2024/12/31 22:38 8m fix candidate upstream error job log
2024/11/19 13:11 1m fix candidate upstream error job log
2024/10/31 17:37 1m bisect fix linux-5.15.y error job log

Sample crash report:
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
================================================================================
UBSAN: shift-out-of-bounds in fs/ocfs2/super.c:2372:4
shift exponent 1037 is too large for 32-bit type 'int'
CPU: 1 PID: 4313 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds+0x37c/0x400 lib/ubsan.c:321
 ocfs2_verify_volume fs/ocfs2/super.c:2372 [inline]
 ocfs2_sb_probe fs/ocfs2/super.c:793 [inline]
 ocfs2_fill_super+0xd87/0x4d80 fs/ocfs2/super.c:989
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3025
 do_mount fs/namespace.c:3368 [inline]
 __do_sys_mount fs/namespace.c:3576 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3553
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb4fa2d466a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffcd79fec08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcd79fec90 RCX: 00007fb4fa2d466a
RDX: 0000200000004440 RSI: 0000200000000240 RDI: 00007ffcd79fec50
RBP: 0000200000004440 R08: 00007ffcd79fec90 R09: 00000000000008c2
R10: 00000000000008c2 R11: 0000000000000246 R12: 0000200000000240
R13: 00007ffcd79fec50 R14: 0000000000004458 R15: 0000200000000100
 </TASK>
================================================================================

Crashes (73):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/11 20:19 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/20 01:04 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: shift-out-of-bounds in ocfs2_fill_super
2025/05/17 17:23 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/10/11 20:03 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/29 03:40 linux-5.15.y c79648372d02 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/04/27 10:07 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/27 21:29 linux-5.15.y 0c935c049b5c 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/10 11:42 linux-5.15.y c16c81c81336 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/08 06:24 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/28 05:56 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/25 05:28 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/31 15:19 linux-5.15.y 003148680b79 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/20 00:12 linux-5.15.y 4735586da88e f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 05:25 linux-5.15.y 91786f140358 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 05:25 linux-5.15.y 91786f140358 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/07 12:45 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/07 12:45 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/26 23:19 linux-5.15.y 0a51d2d4527b e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/26 23:16 linux-5.15.y 0a51d2d4527b e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/25 15:33 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 23:49 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 23:48 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 23:23 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 23:21 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/09/30 22:00 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/09/30 21:59 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/30 21:18 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/28 21:25 linux-5.15.y c79648372d02 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/26 10:40 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/14 01:55 linux-5.15.y 2f693b607545 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/07/11 16:02 linux-5.15.y 2f693b607545 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/06/08 03:41 linux-5.15.y 1c700860e8bc 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/05/17 16:49 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/04/27 04:27 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/04/26 23:33 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/04/26 10:52 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/04/03 00:52 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/30 10:31 linux-5.15.y 0c935c049b5c d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/28 23:52 linux-5.15.y 0c935c049b5c 9a1a9e31 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/27 10:15 linux-5.15.y 0c935c049b5c 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/10 22:46 linux-5.15.y c16c81c81336 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/08 04:41 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/08 04:41 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/07 06:25 linux-5.15.y c16c81c81336 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/03/03 20:50 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/27 23:33 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/26 15:45 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/26 13:22 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/26 13:21 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/22 15:33 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/07 16:07 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/30 17:59 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/30 17:50 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/26 20:25 linux-5.15.y 0a51d2d4527b e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/26 20:25 linux-5.15.y 0a51d2d4527b e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 16:24 linux-5.15.y 0a51d2d4527b 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 16:24 linux-5.15.y 0a51d2d4527b 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 22:55 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 22:55 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 19:08 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 19:08 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/09/30 23:14 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/09/30 21:30 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
* Struck through repros no longer work on HEAD.