UBSAN: shift-out-of-bounds in ext4_fill

Date	Name	Commit	Repro	Result
2023/12/25	lts (merge base)	9b91d36ba301	C	[report] UBSAN: shift-out-of-bounds in ext4_fill_super
2023/12/25	upstream (ToT)	861deac3b092	C	[report] UBSAN: shift-out-of-bounds in ext4_handle_clustersize

Date

Name

Commit

Repro

Result

2023/12/25

lts (merge base)

9b91d36ba301

[report] UBSAN: shift-out-of-bounds in ext4_fill_super

2023/12/25

upstream (ToT)

861deac3b092

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

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: shift-out-of-bounds in ext4_fill_super ext4	C	unreliable		88	1427d	1443d	19/28	fixed on 2021/03/10 01:48

upstream

UBSAN: shift-out-of-bounds in ext4_fill_super ext4

unreliable

1427d

1443d

19/28

fixed on 2021/03/10 01:48


Created	Duration	User	Repo	Result
2024/10/15 00:25	0m	bisect fix	android13-5.15-lts	error job log
2024/09/04 22:06	52m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/08/01 10:10	37m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/06/24 20:27	58m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/05/16 20:27	35m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/04/12 21:32	2h01m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/03/10 18:42	34m	bisect fix	android13-5.15-lts	OK (0) job log log
2024/02/09 14:26	37m	bisect fix	android13-5.15-lts	OK (0) job log log

loop5: detected capacity change from 0 to 512 ================================================================================ UBSAN: shift-out-of-bounds in fs/ext4/super.c:4423:27 shift exponent 59 is too large for 32-bit type 'int' CPU: 0 PID: 572 Comm: syz-executor170 Not tainted 5.15.141-syzkaller-00899-g28e3f5851a99 #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+0x3bf/0x420 lib/ubsan.c:321 ext4_fill_super+0x7491/0x96e0 fs/ext4/super.c:4423 mount_bdev+0x282/0x3b0 fs/super.c:1387 ext4_mount+0x34/0x40 fs/ext4/super.c:6581 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 do_new_mount+0x28b/0xad0 fs/namespace.c:2994 path_mount+0x671/0x1070 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522 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+0x61/0xcb RIP: 0033:0x7f0c4a25309a 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:00007f0c4a20e088 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f0c4a25309a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f0c4a20e0a0 RBP: 00007f0c4a20e0a0 R08: 00007f0c4a20e0e0 R09: 00000000000004d6 R10: 0000000000004500 R11: 0000000000000202 R12: 00007f0c4a20e0e0 R13: 0000000000004500 R14: 0000000000000003 R15: 0000000000040000 </TASK> ================================================================================ EXT4-fs (loop5): 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
2023/12/25 17:57	android13-5.15-lts	28e3f5851a99	fb427a07	.config	strace log	report	syz	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-android-5-15	UBSAN: shift-out-of-bounds in ext4_fill_super

Crashes (1):

Assets (help?)