[Varnish] #170: Segmentation violation in HTC_Read at cache_httpconn.c:195
Varnish
varnish-bugs at projects.linpro.no
Sun Oct 21 16:47:08 CEST 2007
#170: Segmentation violation in HTC_Read at cache_httpconn.c:195
--------------------------------+-------------------------------------------
Reporter: anders | Owner: phk
Type: defect | Status: new
Priority: normal | Milestone:
Component: varnishd | Version: trunk
Severity: normal | Resolution:
Keywords: varnishd core dump |
--------------------------------+-------------------------------------------
Comment (by anders):
This happens also with trunk/2096 including patches for ticket 168
(changeset r2153) and ticket 164 (changeset 2151):
{{{
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2d83dcdca0 (LWP 100612)]
0x0000000800c97ff6 in memcpy () from /lib/libc.so.7
(gdb) bt
#0 0x0000000800c97ff6 in memcpy () from /lib/libc.so.7
#1 0x00000000004173c3 in HTC_Read (htc=0x7fffd389b990, d=0x898036000,
len=1904) at cache_httpconn.c:182
#2 0x000000000041169c in fetch_straight (sp=0x2d8415b008,
htc=0x7fffd389b990,
b=0x2d8341d3aa "1904") at cache_fetch.c:72
#3 0x0000000000412380 in Fetch (sp=0x2d8415b008) at cache_fetch.c:331
#4 0x000000000040ed02 in cnt_fetch (sp=0x2d8415b008) at
cache_center.c:301
#5 0x000000000041006c in CNT_Session (sp=0x2d8415b008) at steps.h:40
#6 0x0000000000417d7d in wrk_do_one (w=0x7fffd389dae0) at
cache_pool.c:193
#7 0x0000000000418227 in wrk_thread (priv=0x800e11200) at
cache_pool.c:245
#8 0x00000008009929a8 in pthread_getprio () from /lib/libthr.so.3
#9 0x00007fffd369e000 in ?? ()
Error accessing memory address 0x7fffd389e000: Bad address.
(gdb) frame 1
#1 0x00000000004173c3 in HTC_Read (htc=0x7fffd389b990, d=0x898036000,
len=1904) at cache_httpconn.c:182
182 memcpy(p, htc->pipeline.b, l);
(gdb) print htc
$1 = (struct http_conn *) 0x7fffd389b990
(gdb) print *htc
$2 = {magic = 1041886673, fd = 22, ws = 0x2d8341d018, rxbuf = {
b = 0x2d8341d280 "HTTP/1.1",
e = 0x2d8341d3de "\n\n\n\n<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML
1.0 Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n<html
xmlns=\"http://www.w3.org/1999/xhtml\">\n<head>\n <!------ OAS SETUP
"...}, pipeline = {
b = 0x2d8341d3de "\n\n\n\n<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML
1.0 Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n<html
xmlns=\"http://www.w3.org/1999/xhtml\">\n<head>\n <!------ OAS SETUP
"..., e = 0x2d8341db4e ""}}
}}}
This was done with gdb attached to the varnish child process this time.
--
Ticket URL: <http://varnish.projects.linpro.no/ticket/170#comment:2>
Varnish <http://varnish.projects.linpro.no/>
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