UBSAN: shift-out-of-bounds in befs_check

Date	Name	Commit	Repro	Result
2023/12/30	upstream (ToT)	f016f7547aee	C	[report] UBSAN: shift-out-of-bounds in befs_check_sb

Date

Name

Commit

Repro

Result

2023/12/30

upstream (ToT)

f016f7547aee

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

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	UBSAN: shift-out-of-bounds in befs_check_sb origin:upstream	C		error	5	107d	275d	0/3	upstream: reported C repro on 2023/08/05 00:55
upstream	UBSAN: shift-out-of-bounds in befs_check_sb fs	C	error	done	35	64d	298d	0/26	upstream: reported C repro on 2023/07/12 13:47

loop0: detected capacity change from 0 to 128 ================================================================================ UBSAN: shift-out-of-bounds in fs/befs/super.c:96:9 shift exponent 3229888891 is too large for 32-bit type 'int' CPU: 1 PID: 3500 Comm: syz-executor362 Not tainted 5.15.145-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_shift_out_of_bounds+0x3bf/0x420 lib/ubsan.c:321 befs_check_sb+0x471/0x4a0 fs/befs/super.c:96 befs_fill_super+0x9ea/0xfb0 fs/befs/linuxvfs.c:874 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x28b/0xae0 fs/namespace.c:2994 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2d5/0x3c0 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: 0033:0x7f82cb06e8ba 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff53aa5b58 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff53aa5b60 RCX: 00007f82cb06e8ba RDX: 0000000020000100 RSI: 0000000020009e40 RDI: 00007fff53aa5b60 RBP: 0000000000000004 R08: 00007fff53aa5ba0 R09: 0000000000009e1f R10: 0000000003008001 R11: 0000000000000282 R12: 00007fff53aa5ba0 R13: 0000000000000003 R14: 0000000000010000 R15: 0000000000000001 </TASK> ================================================================================

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/12/30 18:35	linux-5.15.y	d93fa2c78854	fb427a07	.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 befs_check_sb
2023/07/28 00:41	linux-5.15.y	09996673e313	92476829	.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 befs_check_sb
2024/01/23 11:08	linux-5.15.y	ddcaf4999061	1c0ecc51	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb
2024/01/23 07:19	linux-5.15.y	ddcaf4999061	1c0ecc51	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb
2024/01/21 04:57	linux-5.15.y	ddcaf4999061	9bd8dcda	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb
2024/01/19 19:36	linux-5.15.y	ddcaf4999061	9bd8dcda	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb
2024/01/19 17:15	linux-5.15.y	ddcaf4999061	9bd8dcda	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb
2024/01/19 06:07	linux-5.15.y	ddcaf4999061	21772ce4	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in befs_check_sb