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Date:      Sun, 23 Feb 2020 20:05:22 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 244346] [3] [Kernel panic: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe0032000000] observed while plugging the UFS USB drive on FreeBSD13-CURRENT
Message-ID:  <bug-244346-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244346

            Bug ID: 244346
           Summary: [3] [Kernel panic: vm_fault_lookup: fault on nofault
                    entry, addr: 0xfffffe0032000000] observed while
                    plugging the UFS USB drive on FreeBSD13-CURRENT
           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

Created attachment 211869
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D211869&action=
=3Dedit
Contains PoC UFS image and detailed logs includes 13-current

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.

This doesn't observe on=20
+ FreeBSD 12.1-RELEASE r354233
+ FreeBSD 12.1-STABLE r358121.


[Kernel Log - FreeBSD 13-CURRENT]

freebsd dumped core - see /var/crash/vmcore.0

Fri Feb 21 06:41:47 UTC 2020

FreeBSD freebsd 13.0-CURRENT FreeBSD 13.0-CURRENT #3: Thu Feb 20
03:35:37 UTC 2020
root@freebsd:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

panic: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe0032000000

GNU gdb (GDB) 8.3.1 [GDB v8.3.1 for FreeBSD]
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.htm=
l>
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Reading symbols from /boot/kernel/kernel...
Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug...

Unread portion of the kernel message buffer:
panic: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe0032000000
cpuid =3D 0
time =3D 1582267109
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe002c779=
490
vpanic() at vpanic+0x185/frame 0xfffffe002c7794f0
panic() at panic+0x43/frame 0xfffffe002c779550
vm_fault() at vm_fault+0x1a98/frame 0xfffffe002c779680
vm_fault_trap() at vm_fault_trap+0x6e/frame 0xfffffe002c7796c0
trap_pfault() at trap_pfault+0x1f3/frame 0xfffffe002c779740
trap() at trap+0x2a7/frame 0xfffffe002c779870
calltrap() at calltrap+0x8/frame 0xfffffe002c779870
--- trap 0xc, rip =3D 0xffffffff810104fa, rsp =3D 0xfffffe002c779940, rbp
=3D 0xfffffe002c779950 ---
sse42_crc32c() at sse42_crc32c+0x8a/frame 0xfffffe002c779950
readsuper() at readsuper+0x101/frame 0xfffffe002c779990
ffs_sbget() at ffs_sbget+0x8f/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: 7m56s
Dumping 258 out of 4062 MB:..7%..13%..25%..31%..44%..56%..62%..75%..81%..93%


[Attachments]
+ UFS filesystem image
+ detailed logs from FreeBSD 13-CURRENT

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