[Bug 958210] [NEW] squid ABRT due to storeLocateVaryRead()

Sat Mar 17 22:52:37 UTC 2012

Public bug reported:

squid just aborted (again) on one of the www.ubuntu.com front ends.
It's running a lightly patched version of lucid's
2.7.STABLE7-1ubuntu12.  Looking at the crash and the code in
storeLocateVaryRead(), I'm pretty confident our local patch[1] isn't
the source of the problem.

Backtrace follows:

#0  0x00007f50b0a25a75 in *__GI_raise (sig=<value optimised out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007f50b0a295c0 in *__GI_abort () at abort.c:92
#2  0x00007f50b0a1e941 in *__GI___assert_fail (assertion=0x7f50b1b6ca09 "n", file=<value optimised out>, line=616, function=0x7f50b1b88de8 "@") at assert.c:81
#3  0x00007f50b1b5b540 in xstrndup (
    s=0x7f51113fcd9c "\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n  <title>Homepage | Ubuntu</title>\n  <meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"mod"..., n=0) at util.c:616
#4  0x00007f50b1b1fa4e in storeLocateVaryRead (data=0x7f50e2b25098, buf=<value optimised out>, size=<value optimised out>) at store.c:879
#5  0x00007f50b1b20ad3 in storeClientCallback (sc=0x7f510a06ee48, sz=4096) at store_client.c:146
#6  0x00007f50b1b3bab2 in storeAufsReadDone (fd=<value optimised out>, my_data=0x7f50f96b0ec8, buf=<value optimised out>, len=<value optimised out>, errflag=0)
    at aufs/store_io_aufs.c:400
#7  0x00007f50b1b3e06a in aioCheckCallbacks (SD=<value optimised out>) at aufs/async_io.c:319
#8  0x00007f50b1b236be in storeDirCallback () at store_dir.c:511
#9  0x00007f50b1aca1e0 in comm_select (msec=127) at comm_generic.c:377
#10 0x00007f50b1afc6bc in main (argc=<value optimised out>, argv=<value optimised out>) at main.c:883

This seems very similar to:

 http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-crashes-core-
dumps-and-restarts-automatically-about-once-a-day-td1040891.html

I've attached the full output from 'bt' and 'bt full' in gdb.

--

[1] http://paste.ubuntu.com/888430/ - a variant of which was merged into
upstream squid 2

** Affects: squid (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  squid ABRT due to storeLocateVaryRead()

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