UBSAN: shift-out-of-bounds in exfat_fill

Title	Replies (including bot)	Last reply
[PATCH] Tried making changes	2 (2)	2023/12/02 19:01
[syzbot] Monthly exfat report (Nov 2023)	2 (3)	2023/11/29 15:48
[syzbot] [exfat?] UBSAN: shift-out-of-bounds in exfat_fill_super (2)	0 (1)	2023/11/18 05:11

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: shift-out-of-bounds in exfat_fill_super exfat	C	error		3	1179d	1196d	20/26	fixed on 2021/04/09 19:46

upstream

UBSAN: shift-out-of-bounds in exfat_fill_super exfat

error

1179d

1196d

20/26

fixed on 2021/04/09 19:46

UBSAN: shift-out-of-bounds in fs/exfat/super.c:503:32 shift exponent 97 is too large for 64-bit type 'long long unsigned int' CPU: 1 PID: 11990 Comm: syz-executor.2 Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x2a6/0x480 lib/ubsan.c:387 exfat_read_boot_sector fs/exfat/super.c:503 [inline] __exfat_fill_super fs/exfat/super.c:582 [inline] exfat_fill_super.cold+0x119/0x12a fs/exfat/super.c:646 get_tree_bdev+0x3b5/0x650 fs/super.c:1598 vfs_get_tree+0x8c/0x370 fs/super.c:1771 do_new_mount fs/namespace.c:3337 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3863 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f057367e1ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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:00007f05743c0ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f05743c0f80 RCX: 00007f057367e1ea RDX: 00000000200001c0 RSI: 0000000020000a00 RDI: 00007f05743c0f40 RBP: 00000000200001c0 R08: 00007f05743c0f80 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000202 R12: 0000000020000a00 R13: 00007f05743c0f40 R14: 00000000000014e6 R15: 0000000020000240 </TASK> ================================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/11/14 05:00	upstream	9bacdd8996c7	cb976f63	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	UBSAN: shift-out-of-bounds in exfat_fill_super

Crashes (1):

Assets (help?)