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UBSAN: shift-out-of-bounds in minix_statfs

Status: upstream: reported C repro on 2021/12/13 07:17
Reported-by: syzbot+5ad0824204c7bf9b67f2@syzkaller.appspotmail.com
First crash: 538d, last: 8d21h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: UBSAN: shift-out-of-bounds in minix_statfs (log)
Repro: C syz .config
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] UBSAN: shift-out-of-bounds in minix_statfs 1 (2) 2021/12/13 12:07
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2022/05/10 02:55 8m wanngchenng@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ master report log
2022/05/01 01:41 8m (218) wanngchenng@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ master report log
2022/04/30 10:13 11m (10) wanngchenng@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ master error
▶ ▼ Fix bisection attempts (8)
Created Duration User Patch Repo Result
2023/04/22 22:54 24m bisect fix upstream job log (0) log
2023/03/07 02:51 42m bisect fix upstream job log (0) log
2022/08/23 18:24 21m bisect fix upstream job log (0) log
2022/07/24 18:02 22m bisect fix upstream job log (0) log
2022/06/14 06:55 22m bisect fix upstream job log (0) log
2022/05/10 00:00 18m bisect fix upstream job log (0) log
2022/03/13 13:01 18m bisect fix upstream job log (0) log
2022/01/11 04:09 19m bisect fix upstream job log (0) log

Sample crash report:
memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4995 'syz-executor181'
loop0: detected capacity change from 0 to 256
================================================================================
UBSAN: shift-out-of-bounds in fs/minix/inode.c:380:57
shift exponent 1792 is too large for 64-bit type 'unsigned long'
CPU: 0 PID: 4995 Comm: syz-executor181 Not tainted 6.4.0-rc1-syzkaller-00021-gad2fd53a7870 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x3c3/0x420 lib/ubsan.c:387
 minix_statfs+0x369/0x370 fs/minix/inode.c:380
 statfs_by_dentry fs/statfs.c:66 [inline]
 vfs_statfs+0x137/0x2c0 fs/statfs.c:90
 ovl_check_namelen fs/overlayfs/super.c:919 [inline]
 ovl_get_upper+0x13b/0x5f0 fs/overlayfs/super.c:1123
 ovl_fill_super+0x1745/0x2bd0 fs/overlayfs/super.c:1978
 mount_nodev+0x56/0xe0 fs/super.c:1426
 legacy_get_tree+0xef/0x190 fs/fs_context.c:610
 vfs_get_tree+0x8c/0x270 fs/super.c:1510
 do_new_mount+0x28f/0xae0 fs/namespace.c:3039
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe3f8629809
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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:00007fff7e6c9fd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe3f8629809
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fe3f85e90a0 R08: 0000000020000340 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe3f85e9130
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
================================================================================

Crashes (39):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/05/11 00:45 upstream ad2fd53a7870 0fbd49f4 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root UBSAN: shift-out-of-bounds in minix_statfs
2023/01/01 06:08 upstream e4cf7c25bae5 ab32d508 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/12/05 03:38 upstream c2bf05db6c78 e080de16 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/10/13 21:59 upstream 55be6084c8e0 adf90437 .config strace log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/10/05 09:02 upstream 0326074ff465 267e3bb1 .config strace log report syz C [disk image] [vmlinux] [mounted in repro] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/06/24 17:17 upstream 92f20ff72066 a5dbd430 .config strace log report syz C ci-upstream-kasan-gce-selinux-root UBSAN: shift-out-of-bounds in minix_statfs
2022/05/15 06:54 upstream 2fe1020d73ca 744a39e2 .config strace log report syz C ci-upstream-kasan-gce-smack-root UBSAN: shift-out-of-bounds in minix_statfs
2022/04/07 06:28 upstream 3e732ebf7316 97582466 .config console log report syz C ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2021/12/11 09:47 upstream b8a98b6bf66a 49ca1f59 .config console log report syz C ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/05/13 23:41 linux-next 1e1b28b936ae 107f6434 .config strace log report syz C ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2023/05/24 23:56 upstream 9d646009f65d 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2023/05/12 22:07 upstream cc3c44c9fda2 ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2023/03/23 22:09 upstream 9fd6ba5420ba f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2023/03/20 18:40 upstream e8d018dd0257 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2023/02/05 02:51 upstream db27c22251e7 be607b78 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2023/01/07 10:55 upstream 1f5abbd77e2c 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/11/13 20:08 upstream af7a05689189 7ba4d859 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/10/21 07:19 upstream 493ffd6605b2 a0fd4dab .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/10/14 17:31 upstream 55be6084c8e0 4954e4b2 .config console log report info [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root UBSAN: shift-out-of-bounds in minix_statfs
2022/10/13 07:47 upstream 493ffd6605b2 3f6b40a1 .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/10/05 08:44 upstream 0326074ff465 267e3bb1 .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/09/28 13:54 upstream 46452d3786a8 75c78242 .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/09/27 13:12 upstream 3800a713b607 10323ddf .config console log report info ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/09/22 03:09 upstream 06f7db949993 60af5050 .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: shift-out-of-bounds in minix_statfs
2022/03/26 07:16 upstream 52d543b5497c 89bc8608 .config console log report info ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:45 upstream ed4643521e6a 89bc8608 .config console log report info ci-qemu-upstream UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:41 upstream ed4643521e6a 89bc8608 .config console log report info ci-upstream-kasan-gce-selinux-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:40 upstream ed4643521e6a 89bc8608 .config console log report info ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:40 upstream ed4643521e6a 89bc8608 .config console log report info ci-upstream-kasan-gce-smack-root UBSAN: shift-out-of-bounds in minix_statfs
2022/02/08 07:47 upstream 555f3d7be91a a7dab638 .config console log report info ci-upstream-kasan-gce-smack-root UBSAN: shift-out-of-bounds in minix_statfs
2021/12/11 09:24 upstream b8a98b6bf66a 49ca1f59 .config console log report info ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:43 upstream ed4643521e6a 89bc8608 .config console log report info ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in minix_statfs
2022/11/06 23:07 linux-next 0cdb3579f1ee 6d752409 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/10/16 01:49 linux-next aaa11ce2ffc8 67cb024c .config console log report info [disk image] [vmlinux] ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/10/07 08:23 linux-next aaa11ce2ffc8 8a212197 .config console log report info [disk image] [vmlinux] ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/30 00:33 linux-next c2528a0cdebd 6bdac766 .config console log report info ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/03/24 20:40 linux-next dd315b580061 89bc8608 .config console log report info ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2022/02/11 12:54 linux-next ef6b35306dd8 0b33604d .config console log report info ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
2021/12/12 04:09 linux-next ea922272cbe5 49ca1f59 .config console log report info ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in minix_statfs
* Struck through repros no longer work on HEAD.