UBSAN: shift-out-of-bounds in ext4_handle

Date	Name	Commit	Repro	Result
2023/12/24	lts (merge base)	082280fe94a0	C	[report] UBSAN: shift-out-of-bounds in ext4_handle_clustersize
2023/12/24	upstream (ToT)	861deac3b092	C	[report] UBSAN: shift-out-of-bounds in ext4_handle_clustersize

Date

Name

Commit

Repro

Result

2023/12/24

lts (merge base)

082280fe94a0

[report] UBSAN: shift-out-of-bounds in ext4_handle_clustersize

2023/12/24

upstream (ToT)

861deac3b092

[report] UBSAN: shift-out-of-bounds in ext4_handle_clustersize

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: shift-out-of-bounds in ext4_handle_clustersize (2) ext4	-1	C	error	done	3	677d	680d	25/29	fixed on 2024/02/02 11:15
upstream	UBSAN: shift-out-of-bounds in ext4_handle_clustersize ext4	-1				2	848d	865d	0/29	auto-obsoleted due to no activity on 2023/10/16 19:25

Rank 🛈

upstream

UBSAN: shift-out-of-bounds in ext4_handle_clustersize (2) ext4

-1

error

done

677d

680d

25/29

fixed on 2024/02/02 11:15

upstream

UBSAN: shift-out-of-bounds in ext4_handle_clustersize ext4

-1

848d

865d

0/29

auto-obsoleted due to no activity on 2023/10/16 19:25

Created	Duration	User	Patch	Repo	Result
2025/10/12 01:08	6m	retest repro		android14-6.1	report log
2025/08/02 07:06	6m	retest repro		android14-6.1	report log

Created

Duration

User

Patch

Repo

Result

2025/10/12 01:08

retest repro

android14-6.1

report log

2025/08/02 07:06

retest repro

android14-6.1

report log


Created	Duration	User	Repo	Result
2025/05/23 00:05	2h00m	bisect fix	android14-6.1	error job log
2025/04/20 01:48	48m	bisect fix	android14-6.1	OK (0) job log log
2025/03/16 21:43	1h52m	bisect fix	android14-6.1	OK (0) job log log
2025/02/12 22:46	2h01m	bisect fix	android14-6.1	OK (0) job log log
2025/01/12 01:23	1h36m	bisect fix	android14-6.1	OK (0) job log log
2024/11/23 02:18	1h44m	bisect fix	android14-6.1	OK (0) job log log
2024/10/19 06:59	2h11m	bisect fix	android14-6.1	OK (0) job log log
2024/09/17 18:34	44m	bisect fix	android14-6.1	OK (0) job log log
2024/08/13 23:37	1h23m	bisect fix	android14-6.1	OK (0) job log log
2024/07/03 10:19	1h50m	bisect fix	android14-6.1	OK (0) job log log
2024/05/25 13:10	54m	bisect fix	android14-6.1	OK (0) job log log
2024/04/20 21:26	1h07m	bisect fix	android14-6.1	OK (0) job log log
2024/03/19 02:00	55m	bisect fix	android14-6.1	OK (0) job log log
2024/02/17 01:23	1h01m	bisect fix	android14-6.1	OK (0) job log log

loop0: detected capacity change from 0 to 512 ================================================================================ UBSAN: shift-out-of-bounds in fs/ext4/super.c:4351:27 shift exponent 59 is too large for 32-bit type 'int' CPU: 1 PID: 338 Comm: syz-executor170 Not tainted 6.1.57-syzkaller-00065-g401a2769d990 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 dump_stack+0x15/0x17 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_shift_out_of_bounds+0x3e1/0x440 lib/ubsan.c:321 ext4_handle_clustersize+0x593/0x5c0 fs/ext4/super.c:4351 __ext4_fill_super fs/ext4/super.c:5212 [inline] ext4_fill_super+0x49ed/0x8460 fs/ext4/super.c:5651 get_tree_bdev+0x440/0x680 fs/super.c:1357 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5681 vfs_get_tree+0x88/0x290 fs/super.c:1564 do_new_mount+0x28b/0xad0 fs/namespace.c:3040 path_mount+0x671/0x1070 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3568 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff5a9578f6a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff5a9534088 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007ff5a9578f6a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ff5a95340a0 RBP: 00007ff5a95340a0 R08: 00007ff5a95340e0 R09: 00000000000004d6 R10: 0000000000004500 R11: 0000000000000202 R12: 00007ff5a95340e0 R13: 0000000000004500 R14: 0000000000000003 R15: 0000000000040000 </TASK> ================================================================================ EXT4-fs (loop0): fragment/cluster size (0) != block size (4096)

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/12/24 13:31	android14-6.1	401a2769d990	fb427a07	.config	strace log	report	syz	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-android-6-1	UBSAN: shift-out-of-bounds in ext4_handle_clustersize

Crashes (1):

Assets (help?)