[Bug 242913] Immediate page fault panic caused by executing firefox via ssh

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242913

            Bug ID: 242913
           Summary: Immediate page fault panic caused by executing firefox
                    via ssh
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: iz-rpi03 at hs-karlsruhe.de

Created attachment 210257
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=210257&action=edit
Information collected by savecore(8).

Hello,

when trying to execute a remote firefox (from a debian based system) via
ssh(1) the kernel panics immediately.
Executing xlock(1) from the same remote system does not trigger the panic.

The kernel is a
 13.0-CURRENT #1 r356122M: Fri Dec 27 14:55:13 CET 2019
 root at myhost:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG

and the panic backtrace is always like

panic: page fault
cpuid = 2
time = 1577461608
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00b1f123c0
vpanic() at vpanic+0x17e/frame 0xfffffe00b1f12420
panic() at panic+0x43/frame 0xfffffe00b1f12480
trap_fatal() at trap_fatal+0x386/frame 0xfffffe00b1f124e0
trap_pfault() at trap_pfault+0x4f/frame 0xfffffe00b1f12550
trap() at trap+0x288/frame 0xfffffe00b1f12680
calltrap() at calltrap+0x8/frame 0xfffffe00b1f12680
--- trap 0xc, rip = 0xffffffff828ce27f, rsp = 0xfffffe00b1f12750, rbp =
0xfffffe00b1f12780 ---
linux_file_close() at linux_file_close+0x1f/frame 0xfffffe00b1f12780
_fdrop() at _fdrop+0x1a/frame 0xfffffe00b1f127a0
closef() at closef+0x26d/frame 0xfffffe00b1f12830
unp_freerights() at unp_freerights+0x3a/frame 0xfffffe00b1f12870
unp_externalize() at unp_externalize+0x215/frame 0xfffffe00b1f12900
soreceive_generic() at soreceive_generic+0x5b0/frame 0xfffffe00b1f129c0
soreceive() at soreceive+0x44/frame 0xfffffe00b1f129e0
dofileread() at dofileread+0x81/frame 0xfffffe00b1f12a30
kern_readv() at kern_readv+0x49/frame 0xfffffe00b1f12a70
sys_read() at sys_read+0x83/frame 0xfffffe00b1f12ac0
amd64_syscall() at amd64_syscall+0x3a3/frame 0xfffffe00b1f12bf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00b1f12bf0
--- syscall (3, FreeBSD ELF64, sys_read), rip = 0x8007e9f9a, rsp =
0x7fffffff6ba8, rbp = 0x7fffffff6be0 ---
KDB: enter: panic

Regards, Ralf

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