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From Rob Hartill <>
Subject [BUG]: "kernel panics and dumps core" on SunOS 4.x (fwd)
Date Mon, 03 Mar 1997 19:06:08 GMT

Most useful info at the end..

---------- Forwarded message ----------
Date: Mon Mar  3  7:59:41 1997
Subject: [BUG]: "kernel panics and dumps core" on SunOS 4.x

Operating system: SunOS 4.x, version: 
Version of Apache Used: 1.2b7
Extra Modules used: rewrite, info, auth_dbm, digest, expires, headers, usertrack
URL exhibiting problem: 

SunOs 4.1.3 kernel panics and dumps core,
machine shuts down.  No info is written to log
files and no httpd core is created.  Here's the
syslog entry:

pid 11358, `httpd': Data fault
kernel read fault at addr=0x20, pme=0x0
Sync Error Reg 80<INVALID>
pc=0xf801e7d8, sp=0xf8620da0, psr=0x114000c6, context=0x8
g1-g7: f801e7cc, 4b000, ffffff00, 48000000, f8621000, 0, 0
Begin traceback... sp = f8620da0
Called from f805d534, fp=f8620e00, args=1 ff66f50c 6 1 f8620eb0 0
Called from f8060294, fp=f8620e60, args=ff66f50c 6 1 ff66fb00 0 ff66fb00
Called from f810ac60, fp=f8620ec0, args=f8620fe0 348 f8143ab8 f836a1c8
Called from f8005a54, fp=f8620f58, args=f8621000 f8620fb4 f8620fe0 f8621000
1000 f8620fb4
Called from 4e7c, fp=f7fffca8, args=11 6 1 f7fffd0c 4 1
End traceback...
panic: Data fault

One of our Unix gurus, Rens Troost, reports:

Looking into the coredumps reveals that in fact the same code path is
killing the server each time; the relevant part of the stack trace:

f85eee60 f8060294     _setsockopt+  dc  f85eefe0 348 f8143ab8 f83522a4

Looks like something in Apache is passing a bad value to setsockopt(),
and the argument is not being properly validated.




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