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UBSAN: shift-out-of-bounds in ocfs2_fill_super

Status: upstream: reported C repro on 2024/10/27 03:28
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+ccb371cad4e5ddce7d68@syzkaller.appspotmail.com
First crash: 113d, last: 3d00h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/01/01 linux-6.1.y (ToT) 563edd786f0a C [report] UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/01 upstream (ToT) ccb98ccef0e5 C Didn't crash
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: shift-out-of-bounds in ocfs2_fill_super ocfs2 C 199 118d 185d 28/28 fixed on 2024/10/22 11:56
linux-5.15 UBSAN: shift-out-of-bounds in ocfs2_fill_super missing-backport origin:lts-only C error 29 16d 139d 0/3 upstream: reported C repro on 2024/09/30 21:30
upstream UBSAN: shift-out-of-bounds in ocfs2_fill_super (2) ocfs2 C 81 92d 113d 28/28 fixed on 2024/12/16 09:50

Sample crash report:
         option from the mount to silence this warning.
=======================================================
================================================================================
UBSAN: shift-out-of-bounds in fs/ocfs2/super.c:2365:4
shift exponent 4026531854 is too large for 32-bit type 'int'
CPU: 0 PID: 4290 Comm: syz-executor158 Tainted: G        W          6.1.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:321
 ocfs2_verify_volume fs/ocfs2/super.c:2365 [inline]
 ocfs2_sb_probe fs/ocfs2/super.c:792 [inline]
 ocfs2_fill_super+0xf14/0x48c4 fs/ocfs2/super.c:988
 mount_bdev+0x274/0x370 fs/super.c:1443
 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x278/0x8fc fs/namespace.c:3056
 path_mount+0x590/0xe5c fs/namespace.c:3386
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount fs/namespace.c:3584 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3584
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
================================================================================
(syz-executor158,4290,0):ocfs2_verify_volume:2366 ERROR: bad cluster size found: 16384
(syz-executor158,4290,0):ocfs2_verify_volume:2385 ERROR: status = -22
(syz-executor158,4290,0):ocfs2_fill_super:990 ERROR: superblock probe failed!
(syz-executor158,4290,0):ocfs2_fill_super:1176 ERROR: status = -22

Crashes (24):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/26 04:27 linux-6.1.y 29f02ec58a94 444551c4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/05 08:56 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 06:32 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 06:32 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 23:56 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 23:54 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/11 00:49 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 01:03 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 01:03 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/02/14 08:44 linux-6.1.y 0cbb5f65e52f d9a046cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/18 23:05 linux-6.1.y 60ceadf9247e f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2025/01/02 05:03 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/31 20:37 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/29 08:58 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 04:19 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/12/26 04:17 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 16:08 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/21 16:08 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 22:40 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/10 17:38 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 19:04 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/11/09 19:04 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/10/27 03:40 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
2024/10/27 03:28 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ocfs2_fill_super
* Struck through repros no longer work on HEAD.