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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/04/16 | lts (merge base) | 3a8358583626 | C | [report] UBSAN: shift-out-of-bounds in exfat_fill_super |
| 2025/05/01 | upstream (ToT) | 4f79eaa2ceac | C | [report] UBSAN: shift-out-of-bounds in exfat_fill_super |
| 2026/02/03 | upstream (ToT) | 6bd9ed02871f | C | Failed due to an error; will retry later |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | UBSAN: shift-out-of-bounds in exfat_fill_super (2) exfat | -1 | 1 | 815d | 811d | 0/29 | auto-obsoleted due to no activity on 2024/02/22 05:01 | |||
| upstream | UBSAN: shift-out-of-bounds in exfat_fill_super exfat | -1 | C | error | 3 | 1820d | 1838d | 20/29 | fixed on 2021/04/09 19:46 | |
| linux-5.15 | UBSAN: shift-out-of-bounds in exfat_fill_super (2) origin:lts-only | -1 | C | error | 3 | 35d | 138d | 0/3 | upstream: reported C repro on 2025/09/21 18:12 | |
| linux-5.15 | UBSAN: shift-out-of-bounds in exfat_fill_super | -1 | 1 | 238d | 238d | 0/3 | auto-obsoleted due to no activity on 2025/09/21 09:33 | |||
| android-5-15 | UBSAN: shift-out-of-bounds in exfat_fill_super origin:lts | -1 | C | 13 | 5d02h | 252d | 0/2 | upstream: reported C repro on 2025/05/30 13:08 |
| Created | Duration | User | Patch | Repo | Result |
|---|---|---|---|---|---|
| 2026/02/01 06:46 | 9m | retest repro | android14-6.1 | report log | |
| 2026/02/01 06:46 | 12m | retest repro | android14-6.1 | report log | |
| 2026/01/15 11:24 | 6m | retest repro | android14-6.1 | report log | |
| 2026/01/15 11:24 | 10m | retest repro | android14-6.1 | report log | |
| 2026/01/15 11:24 | 13m | retest repro | android14-6.1 | report log | |
| 2026/01/15 11:24 | 6m | retest repro | android14-6.1 | report log | |
| 2025/12/22 19:18 | 14m | retest repro | android14-6.1 | report log | |
| 2025/11/13 07:03 | 51m | junjie.cao@intel.com | https://github.com/Junjie650/linux.git exfat-ubsan-guard | report log |
| Created | Duration | User | Patch | Repo | Result |
|---|---|---|---|---|---|
| 2025/09/24 00:23 | 1h16m | bisect fix | android14-6.1 | OK (0) job log log | |
| 2025/08/20 17:00 | 1h11m | bisect fix | android14-6.1 | OK (0) job log log | |
| 2025/07/05 11:15 | 2h44m | bisect fix | android14-6.1 | OK (0) job log log | |
| 2025/06/03 04:35 | 54m | bisect fix | android14-6.1 | OK (0) job log log |
loop2: detected capacity change from 0 to 256 exFAT-fs (loop2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. exFAT-fs (loop2): Medium has reported failures. Some data may be lost. ================================================================================ UBSAN: shift-out-of-bounds in fs/exfat/super.c:529:38 shift exponent 121 is too large for 32-bit type 'int' CPU: 1 PID: 388 Comm: syz.2.21 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 dump_stack+0x15/0x24 lib/dump_stack.c:113 ubsan_epilogue+0xe/0x40 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds+0x37c/0x400 lib/ubsan.c:321 exfat_read_boot_sector fs/exfat/super.c:529 [inline] __exfat_fill_super fs/exfat/super.c:585 [inline] exfat_fill_super+0x27e9/0x2bb0 fs/exfat/super.c:649 get_tree_bdev+0x444/0x680 fs/super.c:1368 exfat_get_tree+0x1c/0x20 fs/exfat/super.c:721 vfs_get_tree+0x9a/0x270 fs/super.c:1575 do_new_mount+0x25a/0xa20 fs/namespace.c:3078 path_mount+0x675/0x1010 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3606 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3606 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3414b90eea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3415b10e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3415b10ef0 RCX: 00007f3414b90eea RDX: 00002000000005c0 RSI: 0000200000000240 RDI: 00007f3415b10eb0 RBP: 00002000000005c0 R08: 00007f3415b10ef0 R09: 0000000003000050 R10: 0000000003000050 R11: 0000000000000246 R12: 0000200000000240 R13: 00007f3415b10eb0 R14: 00000000000014fe R15: 0000200000000600 </TASK> ================================================================================ exFAT-fs (loop2): unable to set blocksize 33554432 exFAT-fs (loop2): failed to read boot sector exFAT-fs (loop2): failed to recognize exfat type
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/12/31 17:52 | android14-6.1 | 5e6db7045704 | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/12/31 16:54 | android14-6.1 | 5e6db7045704 | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/12/28 09:12 | android14-6.1 | 5e6db7045704 | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/12/28 08:31 | android14-6.1 | 5e6db7045704 | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/11/09 02:09 | android14-6.1 | 50ba6c46f3ac | 4e1406b4 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/11/09 01:49 | android14-6.1 | 50ba6c46f3ac | 4e1406b4 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/04/16 14:39 | android14-6.1 | efda22f3484c | a95239b1 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/04/16 14:12 | android14-6.1 | efda22f3484c | a95239b1 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super | |
| 2025/04/16 13:43 | android14-6.1 | efda22f3484c | a95239b1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-6-1 | UBSAN: shift-out-of-bounds in exfat_fill_super |