[Bug 50335] Cores dumped under high load (segmentation fault signal 11 SIGSEGV)

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=50335

--- Comment #9 from Sean Timmins <st...@wiley.co.uk> ---
Here are two different stack traces from an unpatched httpd v2.2.22 that seems
to be exhibiting the same issue as per my previous comment.

I am also running one instance of httpd v2.2.22 with the attached proposed
patch applied.

Systems are Oracle T4s running Solaris 10 (Generic_147330-09)

#0  0xff297500 in apr_brigade_cleanup (data=0xdf8828)
    at buckets/apr_brigade.c:44
44              apr_bucket_delete(e);
(gdb) where
#0  0xff297500 in apr_brigade_cleanup (data=0xdf8828)
    at buckets/apr_brigade.c:44
#1  0xff125fb0 in run_cleanups (cref=0xdf49f0) at memory/unix/apr_pools.c:2346
#2  0xff1270a0 in apr_pool_destroy (pool=0xdf49e0)
    at memory/unix/apr_pools.c:809
#3  0xff1272fc in apr_pool_clear (pool=0xdec9c0) at memory/unix/apr_pools.c:764
#4  0x00050158 in worker_thread (thd=0xcc9c0, dummy=0x3) at worker.c:897
#5  0xff131f1c in dummy_worker (opaque=0xcc9c0) at threadproc/unix/thread.c:142
#6  0xfef3a9d0 in _lwp_start () from /lib/libc.so.1
#7  0xfef3a9d0 in _lwp_start () from /lib/libc.so.1
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)


#0  0xfef3e3ac in _read () from /lib/libc.so.1
(gdb) where
#0  0xfef3e3ac in _read () from /lib/libc.so.1
#1  0xfef2ca24 in read () from /lib/libc.so.1
#2  0x0005296c in ap_mpm_pod_check (pod=0xacf50) at pod.c:54
#3  0x00050a0c in child_main (child_num_arg=17) at worker.c:1258
#4  0x00050b88 in make_child (s=0x7b800, slot=17) at worker.c:1341
#5  0x000513b8 in ap_mpm_run (_pconf=0xfe710158, plog=0x14, s=0x2693)
    at worker.c:1560
#6  0x0002afec in main (argc=5, argv=0xffbffb6c) at main.c:753

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