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UBSAN: shift-out-of-bounds in parse_options

Status: upstream: reported C repro on 2024/08/13 23:52
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+410500002694f3ff65b1@syzkaller.appspotmail.com
First crash: 161d, last: 3h36m
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: UBSAN: shift-out-of-bounds in parse_options (log)
Repro: C syz .config
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/08/18 linux-6.1.y (ToT) 117ac406ba90 C [report] UBSAN: shift-out-of-bounds in parse_options
2024/08/18 upstream (ToT) c3f2d783a459 C Didn't crash
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 UBSAN: shift-out-of-bounds in parse_options ext4 origin:lts C error 238 20h50m 745d 0/2 upstream: reported C repro on 2023/01/08 05:56
linux-5.15 UBSAN: shift-out-of-bounds in parse_options origin:lts-only C unreliable 121 47m 429d 0/3 upstream: reported C repro on 2023/11/19 20:08
android-6-1 UBSAN: shift-out-of-bounds in parse_options origin:lts C 107 1d11h 158d 0/2 upstream: reported C repro on 2024/08/17 08:59
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2024/11/13 18:29 12h03m fix candidate upstream error job log
2024/10/10 01:45 12h28m fix candidate upstream error job log
2024/09/21 10:46 1h51m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
loop0: detected capacity change from 0 to 40427
================================================================================
UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5
shift exponent 105 is too large for 64-bit type 'unsigned long'
CPU: 0 PID: 3631 Comm: syz-executor342 Not tainted 6.1.105-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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
 parse_options+0x4ad6/0x4ae0 fs/f2fs/super.c:919
 f2fs_fill_super+0x321b/0x7c40 fs/f2fs/super.c:4214
 mount_bdev+0x2c9/0x3f0 fs/super.c:1443
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3366d541ea
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:00007ffdb9a98888 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffdb9a988a0 RCX: 00007f3366d541ea
RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 00007ffdb9a988a0
RBP: 0000000000000004 R08: 00007ffdb9a988e0 R09: 00000000000054fa
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000
R13: 00007ffdb9a988e0 R14: 0000000000000003 R15: 00000000013bd7ef
 </TASK>
================================================================================

Crashes (47):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/18 08:24 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/11/28 17:49 linux-6.1.y e4d90d63d385 5df23865 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/08/18 00:44 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/08 05:03 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/12/31 23:24 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/11/13 07:48 linux-6.1.y d7039b844a1c 62026c85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/10/01 04:38 linux-6.1.y aa4cd140bba5 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/09/27 05:30 linux-6.1.y e526b12bf916 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/09/27 05:30 linux-6.1.y e526b12bf916 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/08/17 17:21 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2024/08/17 17:21 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2025/01/22 09:35 linux-6.1.y f4f677285b38 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/21 15:38 linux-6.1.y f4f677285b38 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/20 10:32 linux-6.1.y f4f677285b38 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/19 03:55 linux-6.1.y 60ceadf9247e f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/07 01:41 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/06 19:45 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/06 12:47 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/04 11:28 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/04 08:59 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/02 04:52 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/02 04:44 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/01/01 16:20 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/29 20:03 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/28 23:01 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/27 09:08 linux-6.1.y 29f02ec58a94 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/24 19:39 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/24 14:06 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/21 19:31 linux-6.1.y 29f02ec58a94 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/08 17:57 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/08 02:50 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/07 20:52 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/04 15:42 linux-6.1.y e4d90d63d385 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/02 23:13 linux-6.1.y e4d90d63d385 b499ea68 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/12/01 13:09 linux-6.1.y e4d90d63d385 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/28 22:30 linux-6.1.y e4d90d63d385 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/28 17:18 linux-6.1.y e4d90d63d385 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/12 17:15 linux-6.1.y d7039b844a1c 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/12 17:13 linux-6.1.y d7039b844a1c 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/09 12:29 linux-6.1.y d7039b844a1c 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/03 11:26 linux-6.1.y 7c15117f9468 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/11/02 07:15 linux-6.1.y 7c15117f9468 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/09/27 07:37 linux-6.1.y e526b12bf916 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/09/27 07:35 linux-6.1.y e526b12bf916 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/08/17 17:23 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/08/17 17:23 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2024/08/13 23:51 linux-6.1.y 36790ef5e00b f21a18ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
* Struck through repros no longer work on HEAD.