1.3.12 occasional segfaults

[digitalpoint]

It's a fairly vanilla install of nginx (with the exception of the SPDY
patch).  We are seeing roughly 1 segfault every hour or so on each web
server... I didn't generate a debugging log, because I wasn't sure how big
something like that would be for an entire hour, but I can if needed.

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nginx -V
-------

nginx version: nginx/1.3.12
built by gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux) 
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx
--pid-path=/var/run/nginx.pid --error-log-path=/usr/log/ngnix/error.log
--http-log-path=/usr/log/ngnix/access.log
--with-openssl=/home/software_source/openssl-1.0.1c --with-cc-opt='-I
/usr/local/ssl/include' --with-ld-opt='-L /usr/local/ssl/lib'
--without-http_proxy_module --without-http_ssi_module --with-http_ssl_module
--with-http_stub_status_module --with-http_spdy_module


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backtrace from core dump:
-------

#0  0x00000000004514ea in ngx_http_spdy_send_output_queue (sc=0xd77610) at
src/http/ngx_http_spdy.c:713
        cl = <value optimized out>
        c = 0x7fe9a5436f90
        clcf = <value optimized out>
        out = <value optimized out>
        frame = 0xa250d0
        fn = <value optimized out>
#1  0x00000000004520b2 in ngx_http_spdy_write_handler (wev=<value optimized
out>) at src/http/ngx_http_spdy.c:644
        rc = <value optimized out>
        c = <value optimized out>
        fc = <value optimized out>
        ctx = <value optimized out>
        r = <value optimized out>
        stream = <value optimized out>
        s = <value optimized out>
        sn = <value optimized out>
        sc = 0xd77610
#2  0x000000000041a5ba in ngx_event_process_posted (cycle=<value optimized
out>, posted=0x854a88) at src/event/ngx_event_posted.c:40
        ev = <value optimized out>
#3  0x000000000041a1d5 in ngx_process_events_and_timers (cycle=0x885a90) at
src/event/ngx_event.c:276
        flags = 3
        timer = <value optimized out>
        delta = 81
#4  0x0000000000420038 in ngx_worker_process_cycle (cycle=0x885a90,
data=<value optimized out>) at src/os/unix/ngx_process_cycle.c:807
        worker = <value optimized out>
        i = <value optimized out>
        c = <value optimized out>
#5  0x000000000041e9a3 in ngx_spawn_process (cycle=0x885a90, proc=0x41ff6c
<ngx_worker_process_cycle>, data=0x2, name=0x59b51a "worker process",
respawn=-3) at src/os/unix/ngx_process.c:198
        on = 1
        pid = 0
        s = 2
#6  0x000000000041f5f6 in ngx_start_worker_processes (cycle=0x885a90, n=4,
type=-3) at src/os/unix/ngx_process_cycle.c:362
        i = <value optimized out>
        ch = {command = 1, pid = 6348, slot = 1, fd = 19}
#7  0x00000000004206d1 in ngx_master_process_cycle (cycle=0x885a90) at
src/os/unix/ngx_process_cycle.c:136
        title = 0x973f74 "master process /usr/sbin/nginx"
        p = <value optimized out>
        size = 31
        i = 1
        n = <value optimized out>
        sigio = <value optimized out>
        set = {__val = {0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0}}
        itv = {it_interval = {tv_sec = 0, tv_usec = 0}, it_value = {tv_sec =
0, tv_usec = 0}}
        live = <value optimized out>
        delay = <value optimized out>
        ls = <value optimized out>
        ccf = 0x0
#8  0x000000000040546c in main (argc=<value optimized out>, argv=<value
optimized out>) at src/core/nginx.c:412
        i = <value optimized out>
        log = 0x84d7a0
        cycle = 0x0
        init_cycle = {conf_ctx = 0x0, pool = 0x884fa0, log = 0x84d7a0,
new_log = {log_level = 0, file = 0x0, connection = 0, handler = 0, data =
0x0, action = 0x0}, files = 0x1, free_connections = 0x0, free_connection_n =
0, reusable_connections_queue = {
            prev = 0x0, next = 0x0}, listening = {elts = 0x0, nelts = 0,
size = 0, nalloc = 0, pool = 0x0}, paths = {elts = 0x0, nelts = 0, size = 0,
nalloc = 1, pool = 0x0}, open_files = {last = 0x0, part = {elts = 0x0, nelts
= 0, next = 0x0}, size = 0, 
            nalloc = 0, pool = 0x0}, shared_memory = {last = 0x0, part =
{elts = 0x0, nelts = 0, next = 0x0}, size = 1, nalloc = 0, pool = 0x0},
connection_n = 0, files_n = 0, connections = 0x0, read_events = 0x0,
write_events = 0x0, old_cycle = 0x0, conf_file = {
            len = 0, data = 0x0}, conf_param = {len = 0, data = 0x0},
conf_prefix = {len = 1, data = 0x0}, prefix = {len = 0, data = 0x0},
lock_file = {len = 0, data = 0x0}, hostname = {len = 0, data = 0x0}}
        ccf = <value optimized out>

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,236409,236409#msg-236409