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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: 660d, last: 4d03h
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
  
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH 5.10] f2fs: fix shift-out-of-bounds in parse_options() 1 (1) 2025/02/20 08:33
[PATCH 5.15] f2fs: fix shift-out-of-bounds in parse_options() 1 (1) 2025/02/20 08:33
[PATCH 6.1] f2fs: fix shift-out-of-bounds in parse_options() 1 (1) 2025/02/20 08:32
▶ ▼ 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 Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 UBSAN: shift-out-of-bounds in parse_options ext4 origin:lts -1 C error 1955 1h39m 1243d 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 -1 C unreliable 476 4d01h 928d 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 -1 C 810 2h23m 656d 0/2 upstream: reported C repro on 2024/08/17 08:59
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
2025/06/03 13:03 1h47m fix candidate upstream OK (0) job log
2025/03/18 02:15 12h04m fix candidate upstream error job log
2025/02/01 08:15 12h01m fix candidate upstream error job log
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 (349):
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
2026/03/31 04:23 linux-6.1.y 1989cd3d56e2 d0af506e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/29 14:41 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/25 01:42 linux-6.1.y f2ddafa93a25 74e70d19 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/01/14 03:49 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/10/04 08:15 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/06/20 06:42 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2025/03/08 22:52 linux-6.1.y 6ae7ac5c4251 7e3bd60d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 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
2026/05/30 20:24 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2026/05/04 04:16 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2026/05/02 14:03 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2026/05/01 09:03 linux-6.1.y 4931e0e1673d 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2026/04/20 12:57 linux-6.1.y 7c87defbd336 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: shift-out-of-bounds in parse_options
2026/05/31 21:26 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/31 16:53 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/31 07:32 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/30 23:36 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/29 22:13 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/28 09:58 linux-6.1.y dcbcab9d7079 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/23 09:50 linux-6.1.y c27210688955 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/14 21:18 linux-6.1.y ad16b162f21d 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/08 05:21 linux-6.1.y 4931e0e1673d 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/04 17:50 linux-6.1.y 4931e0e1673d 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/03 15:45 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/02 12:20 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/05/01 07:05 linux-6.1.y 4931e0e1673d 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/26 09:23 linux-6.1.y 7c87defbd336 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/26 05:39 linux-6.1.y 7c87defbd336 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/23 22:12 linux-6.1.y 7c87defbd336 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/14 20:08 linux-6.1.y 8e8fc038cad5 362d1323 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/12 03:35 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/12 01:12 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/11 07:08 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/11 00:03 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/06 03:02 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/05 07:32 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/04 22:39 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/04 03:01 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/02 08:36 linux-6.1.y 1989cd3d56e2 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/04/02 07:16 linux-6.1.y 1989cd3d56e2 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/30 06:54 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/30 02:37 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/29 11:02 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/28 10:22 linux-6.1.y 1989cd3d56e2 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/27 23:52 linux-6.1.y 1989cd3d56e2 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/18 05:12 linux-6.1.y f2ddafa93a25 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/09 05:26 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/08 14:51 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/08 10:22 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/05 05:17 linux-6.1.y 2f66dd9cff42 a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/04 08:40 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/04 02:22 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/03/02 05:33 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/02/21 18:33 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/02/14 22:08 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/02/14 09:55 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in parse_options
2026/02/14 04:25 linux-6.1.y 8ce36b2849ef 1e62d198 .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.