UBSAN: array-index-out-of-bounds in dtSplitRoot

Title	Replies (including bot)	Last reply
[syzbot] UBSAN: array-index-out-of-bounds in dtSplitRoot	0 (1)	2022/10/15 19:21

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[syzbot] UBSAN: array-index-out-of-bounds in dtSplitRoot

0 (1)

2022/10/15 19:21

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	KASAN: slab-out-of-bounds Read in dtSplitRoot	C		error	1	231d	231d	0/1	upstream: reported C repro on 2022/10/14 11:28
linux-4.14	KASAN: slab-out-of-bounds Read in dtSplitRoot	C			1	95d	229d	0/1	upstream: reported C repro on 2022/10/15 22:33

linux-4.19

KASAN: slab-out-of-bounds Read in dtSplitRoot

error

231d

0/1

upstream: reported C repro on 2022/10/14 11:28

linux-4.14

KASAN: slab-out-of-bounds Read in dtSplitRoot

95d

229d

0/1

upstream: reported C repro on 2022/10/15 22:33


Created	Duration	User	Repo	Result
2023/05/31 06:20	43m	bisect fix	upstream	job log (0) log
2023/04/27 00:51	43m	bisect fix	upstream	job log (0) log
2023/03/28 00:07	42m	bisect fix	upstream	job log (0) log
2023/02/25 20:29	49m	bisect fix	upstream	job log (0) log
2023/01/25 10:09	39m	bisect fix	upstream	job log (0) log
2022/11/13 10:41	32m	bisect fix	upstream	job log (0) log

loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 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: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000 </TASK> ================================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets	Manager	Title
2022/10/14 10:40	upstream	493ffd6605b2	4954e4b2	.config	strace log	report	syz	C		[disk image] [vmlinux] [mounted in repro]	ci2-upstream-fs	UBSAN: array-index-out-of-bounds in dtSplitRoot
2022/10/14 10:12	upstream	493ffd6605b2	4954e4b2	.config	console log	report			info	[disk image] [vmlinux]	ci2-upstream-fs	UBSAN: array-index-out-of-bounds in dtSplitRoot

Crashes (2):