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Date:      Sun, 23 Feb 2020 19:21:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 244342] Kernel panic observed while plugging the UFS USB drive on FreeBSD13-CURRENT, FreeBSD 12.1-RELEASE r354233 and FreeBSD 12.1-STABLE r358121
Message-ID:  <bug-244342-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244342

            Bug ID: 244342
           Summary: Kernel panic observed while plugging the UFS USB drive
                    on FreeBSD13-CURRENT, FreeBSD 12.1-RELEASE r354233 and
                    FreeBSD 12.1-STABLE r358121
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: neerajpal09@gmail.com

Hi there,

Kernel Panic is observed while attaching the usb drive which contains malic=
ious
UFS filesystem image. No user authentication and interaction is needed.

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.


[Kernel Log - FreeBSD 13-CURRENT]

freebsd dumped core - see /var/crash/vmcore.8

Wed Feb 19 16:29:20 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: g_read_data(): invalid length 11866112

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 condition=
s.
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:
Superblock check-hash failed: recorded check-hash 0x11bd7e03 !=3D
computed check-hash 0x10378f61 (Ignored)
panic: g_read_data(): invalid length 11866112
cpuid =3D 3
time =3D 1582129685
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe002c779=
870
vpanic() at vpanic+0x185/frame 0xfffffe002c7798d0
panic() at panic+0x43/frame 0xfffffe002c779930
g_read_data() at g_read_data+0xf9/frame 0xfffffe002c779970
g_use_g_read_data() at g_use_g_read_data+0x35/frame 0xfffffe002c779990
ffs_sbget() at ffs_sbget+0x24f/frame 0xfffffe002c779a00
g_label_ufs_taste_common() at g_label_ufs_taste_common+0x79/frame
0xfffffe002c779a40
g_label_taste() at g_label_taste+0x2ac/frame 0xfffffe002c779b50
g_new_provider_event() at g_new_provider_event+0xaa/frame 0xfffffe002c779b70
g_run_events() at g_run_events+0x176/frame 0xfffffe002c779bb0
fork_exit() at fork_exit+0x80/frame 0xfffffe002c779bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe002c779bf0
--- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 ---
KDB: enter: panic
Uptime: 15m6s
Dumping 268 out of 4062 MB:..6%..12%..24%..36%..42%..54%..66%..72%..84%..96%

[Attachments]
+ UFS filesystem image
+ detailed logs from FreeBSD 13-CURRENT, 12.1-RELEASE, and 12.1-STABLE.

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