Apparent regression in r250359

[Jim Ohlstein]

Hello,

I upgraded my (custom) kernel earlier and found that multiple daemons 
(cups, hal, syslog, ntpd, csh) crashed and dumped cores at or shortly 
after boot.

The error I saw several times on the console was:

set_fpcontext err 22

I recompiled using the GENERIC kernel and saw the same error.


The error appears to be in the changes made in r250359 in fpu.c, as 
r250358 boots as expected.

# uname -a
FreeBSD lucid-insanity 9.1-STABLE FreeBSD 9.1-STABLE #3 r250358: Wed May 
  8 11:56:43 EDT 2013 
root at lucid-insanity:/usr/obj/usr/src/sys/GENERIC  amd64


World and kernel are built with clang 3.2.

r250359 produces the error and core dumps:

Sample gdb output:

# gdb cupsd cupsd.core
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"...(no debugging 
symbols found)...
Core was generated by `cupsd'.
Program terminated with signal 10, Bus error.
Reading symbols from /usr/local/lib/libcupsmime.so.1...(no debugging 
symbols found)...done.
Loaded symbols for /usr/local/lib/libcupsmime.so.1
Reading symbols from /lib/libz.so.6...done.
Loaded symbols for /lib/libz.so.6
Reading symbols from /usr/lib/libssl.so.6...done.
Loaded symbols for /usr/lib/libssl.so.6
Reading symbols from /lib/libcrypto.so.6...done.
Loaded symbols for /lib/libcrypto.so.6
Reading symbols from /usr/local/lib/libpaper.so.2...done.
Loaded symbols for /usr/local/lib/libpaper.so.2
Reading symbols from /usr/local/lib/libcups.so.2...done.
Loaded symbols for /usr/local/lib/libcups.so.2
Reading symbols from /lib/libcrypt.so.5...done.
Loaded symbols for /lib/libcrypt.so.5
Reading symbols from /lib/libm.so.5...done.
Loaded symbols for /lib/libm.so.5
Reading symbols from /usr/local/lib/libiconv.so.3...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /lib/libthr.so.3...done.
Loaded symbols for /lib/libthr.so.3
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x00007ffffffff1e3 in ?? ()
[New Thread 802407400 (LWP 100450/cupsd)]
(gdb)

# gdb csh csh.core
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"...
Core was generated by `csh'.
Program terminated with signal 10, Bus error.
Reading symbols from /lib/libncurses.so.8...done.
Loaded symbols for /lib/libncurses.so.8
Reading symbols from /lib/libcrypt.so.5...done.
Loaded symbols for /lib/libcrypt.so.5
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /usr/local/lib/libiconv.so...done.
Loaded symbols for /usr/local/lib/libiconv.so
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x00007ffffffff1e3 in ?? ()
(gdb)

I can produce more if anyone is interested.


-- 
Jim Ohlstein