| Summary: |
[8] [Kernel panic: ufs_dirbad: /mnt/test: bad dir ino 2 at offset 154: mangled entry] observed while mouting the UFS USB drive on FreeBSD13-CURRENT, FreeBSD 12.1-RELEASE r354233 and FreeBSD 12.1-STABLE r358121 |
| Product: |
Base System
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Reporter: |
Neeraj <neerajpal09> |
| Component: |
kern | Assignee: |
freebsd-fs (Nobody) <fs> |
| Status: |
Closed
FIXED
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| Severity: |
Affects Only Me
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CC: |
cem, grahamperrin, mckusick
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| Priority: |
---
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| Version: |
CURRENT | |
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| Hardware: |
Any | |
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| OS: |
Any | |
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| Bug Depends on: |
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| Bug Blocks: |
244384, 263979
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| Attachments: |
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Created attachment 211874 [details] Contains PoC UFS image, README and detailed logs includes 13-current, 12.1-release and 12.1-stable Hi there, Kernel Panic is observed while mounting the usb drive which contains malicious UFS filesystem image. But if the automount is configured or user has ability to mount the usb drive then during mount kernel panic occurs. No user authentication and interaction is needed in case of automount is configured, tested with "/etc/fstab". Just flash the attached UFS image to usb drive and plug the usb drive to FreeBSD 13-CURRENT, 12.1-RELEASE, or 12.1-STABLE, then mount it. [Kernel Log - FreeBSD 13-CURRENT] freebsd dumped core - see /var/crash/vmcore.5 Wed Feb 19 18:56:31 UTC 2020 FreeBSD freebsd 13.0-CURRENT FreeBSD 13.0-CURRENT #0: Wed Feb 19 01:58:08 UTC 2020 root@freebsd:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 panic: ufs_dirbad: /mnt/test: bad dir ino 2 at offset 154: mangled entry GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-marcel-freebsd"... Unread portion of the kernel message buffer: panic: ufs_dirbad: /mnt/test: bad dir ino 2 at offset 154: mangled entry cpuid = 0 time = 1582138460 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0039f074e0 vpanic() at vpanic+0x185/frame 0xfffffe0039f07540 panic() at panic+0x43/frame 0xfffffe0039f075a0 ufs_lookup_ino() at ufs_lookup_ino+0xdd4/frame 0xfffffe0039f076c0 vfs_cache_lookup() at vfs_cache_lookup+0xa8/frame 0xfffffe0039f07710 lookup() at lookup+0x5f1/frame 0xfffffe0039f077b0 namei() at namei+0x553/frame 0xfffffe0039f078a0 kern_statat() at kern_statat+0x7f/frame 0xfffffe0039f079c0 sys_fstatat() at sys_fstatat+0x2f/frame 0xfffffe0039f07ac0 amd64_syscall() at amd64_syscall+0x168/frame 0xfffffe0039f07bf0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0039f07bf0 --- syscall (552, FreeBSD ELF64, sys_fstatat), rip = 0x800419a8a, rsp = 0x7fffffffe8e8, rbp = 0x7fffffffe9a0 --- KDB: enter: panic Uptime: 4m42s Dumping 260 out of 4062 MB:..7%..13%..25%..31%..43%..56%..62%..74%..86%..93% [Attachments] + UFS filesystem image + detailed logs from FreeBSD 13-CURRENT, 12.1-RELEASE, and 12.1-STABLE.