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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: 474d, last: 7d09h

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
Last patch testing requests:
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

Sample crash report:
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 'long unsigned int'
CPU: 1 PID: 5067 Comm: syz-executor405 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x31 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x187 lib/ubsan.c:321
 minix_statfs.cold+0x17/0x1c fs/minix/inode.c:380
 statfs_by_dentry+0x133/0x210 fs/statfs.c:66
 vfs_statfs+0x3a/0x90 fs/statfs.c:90
 ovl_check_namelen+0x80/0x110 fs/overlayfs/super.c:919
 ovl_get_upper fs/overlayfs/super.c:1131 [inline]
 ovl_fill_super+0x13b0/0x6330 fs/overlayfs/super.c:1986
 mount_nodev+0x64/0x120 fs/super.c:1405
 legacy_get_tree+0x109/0x220 fs/fs_context.c:610
 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
 do_new_mount fs/namespace.c:3145 [inline]
 path_mount+0x132a/0x1e20 fs/namespace.c:3475
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount fs/namespace.c:3674 [inline]
 __x64_sys_mount+0x283/0x300 fs/namespace.c:3674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f92f01757e9
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:00007ffc33b1ec18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f92f01757e9
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f92f0135080 R08: 0000000020000340 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92f0135110
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
================================================================================

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-fs 2023/03/07 03:34 upstream 8ca09d5fa354 e080de16 .config console log report syz C
ci-upstream-kasan-gce-selinux-root 2022/08/23 18:45 upstream 072e51356cd5 a5dbd430 .config console log report syz C
ci-upstream-kasan-gce-selinux-root 2022/07/24 18:24 upstream af2c9ac24019 a5dbd430 .config console log report syz C
ci-upstream-kasan-gce-smack-root 2022/06/14 07:17 upstream b13baccc3850 744a39e2 .config console log report syz C
ci-upstream-kasan-gce-root 2022/05/10 00:18 upstream 9be9ed2612b5 97582466 .config console log report syz C
ci-upstream-kasan-gce-root 2022/03/13 13:19 upstream aad611a868d1 49ca1f59 .config console log report syz C
ci-upstream-kasan-gce-root 2022/01/11 04:29 upstream 63045bfd3c8d 49ca1f59 .config console log report syz C
* Struck through repros no longer work on HEAD.
Crashes (36):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-root 2023/01/01 06:08 upstream e4cf7c25bae5 ab32d508 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/12/05 03:38 upstream c2bf05db6c78 e080de16 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2022/10/13 21:59 upstream 55be6084c8e0 adf90437 .config strace log report syz C [disk image] [vmlinux] [mounted in repro] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/10/05 09:02 upstream 0326074ff465 267e3bb1 .config strace log report syz C [disk image] [vmlinux] [mounted in repro] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-selinux-root 2022/06/24 17:17 upstream 92f20ff72066 a5dbd430 .config strace log report syz C UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-smack-root 2022/05/15 06:54 upstream 2fe1020d73ca 744a39e2 .config strace log report syz C UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2022/04/07 06:28 upstream 3e732ebf7316 97582466 .config console log report syz C UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2021/12/11 09:47 upstream b8a98b6bf66a 49ca1f59 .config console log report syz C UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/05/13 23:41 linux-next 1e1b28b936ae 107f6434 .config strace log report syz C UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2023/03/23 22:09 upstream 9fd6ba5420ba f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2023/03/20 18:40 upstream e8d018dd0257 7939252e .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2023/02/05 02:51 upstream db27c22251e7 be607b78 .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2023/01/07 10:55 upstream 1f5abbd77e2c 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/11/13 20:08 upstream af7a05689189 7ba4d859 .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/10/21 07:19 upstream 493ffd6605b2 a0fd4dab .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-smack-root 2022/10/14 17:31 upstream 55be6084c8e0 4954e4b2 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/10/13 07:47 upstream 493ffd6605b2 3f6b40a1 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/10/05 08:44 upstream 0326074ff465 267e3bb1 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/09/28 13:54 upstream 46452d3786a8 75c78242 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/09/27 13:12 upstream 3800a713b607 10323ddf .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci2-upstream-fs 2022/09/22 03:09 upstream 06f7db949993 60af5050 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2022/03/26 07:16 upstream 52d543b5497c 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-qemu-upstream 2022/03/24 20:45 upstream ed4643521e6a 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-selinux-root 2022/03/24 20:41 upstream ed4643521e6a 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2022/03/24 20:40 upstream ed4643521e6a 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-smack-root 2022/03/24 20:40 upstream ed4643521e6a 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-smack-root 2022/02/08 07:47 upstream 555f3d7be91a a7dab638 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-kasan-gce-root 2021/12/11 09:24 upstream b8a98b6bf66a 49ca1f59 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-qemu-upstream-386 2022/03/24 20:43 upstream ed4643521e6a 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/11/06 23:07 linux-next 0cdb3579f1ee 6d752409 .config console log report info [disk image] [vmlinux] [kernel image] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/10/16 01:49 linux-next aaa11ce2ffc8 67cb024c .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/10/07 08:23 linux-next aaa11ce2ffc8 8a212197 .config console log report info [disk image] [vmlinux] UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/03/30 00:33 linux-next c2528a0cdebd 6bdac766 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/03/24 20:40 linux-next dd315b580061 89bc8608 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2022/02/11 12:54 linux-next ef6b35306dd8 0b33604d .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
ci-upstream-linux-next-kasan-gce-root 2021/12/12 04:09 linux-next ea922272cbe5 49ca1f59 .config console log report info UBSAN: shift-out-of-bounds in minix_statfs
* Struck through repros no longer work on HEAD.