Wind River Support Network

Description

We have now found new side effects with the patches.

Under high load and when using IPv6 we've found that named can crash with a segmentation fault. It crashes on a line inserted by the patches provided in this defect : LIN5-21257

Example of backtrace (unfortunately without libc debug symbols):

#0  0x00000036c380ab17 in ?? ()

#1  0x00007f34dbaec440 in ?? ()

#2  0x00000000004f9940 in resquery_destroy (queryp=0x7f34f41e4e78) at resolver.c:773

#3  0x00007f34dbaec440 in ?? ()

#4  0x00007f34f02d8850 in ?? ()

#5  0x00007f34f79f2028 in ?? ()

#6  0x00007f34f79f2088 in ?? ()

#7  0x00007f34f0309eb0 in ?? ()

#8  0x00000000004ff2a2 in process_sendevent (query=0x7f34dbaf2010, event=0x7f34f0309eb0) at resolver.c:1194

#9  0x00007f34f0309eb0 in ?? ()

#10 0x00007f34dbaf2010 in ?? ()

#11 0x00007f34f79f2010 in ?? ()

#12 0x000000000058a578 in dispatch (uap=0x7f34dbaf2010) at task.c:1012

#13 run (uap=0x7f34dbaf2010) at task.c:1157

#14 0x0000000000000000 in ?? () 

 

resolver.c with annotated line numbers with RCPL35+patches received from you:

 753 static inline void

 754 resquery_destroy(resquery_t **queryp) {

 755     dns_resolver_t *res;

 756     isc_boolean_t empty;

 757     resquery_t *query;

 758     fetchctx_t *fctx;

 759

 760     REQUIRE(queryp != NULL);

 761     query = *queryp;

 762     REQUIRE(!ISC_LINK_LINKED(query, link));

 763

 764     INSIST(query->tcpsocket == NULL);

 765

 766     fctx = query->fctx; 

 767     res = fctx->res;

 768

 769     fctx->nqueries--;

 770

 771     LOCK(&res->buckets[fctx->bucketnum].lock);

 772     empty = fctx_decreference(query->fctx);

 773     UNLOCK(&res->buckets[fctx->bucketnum].lock);

 774

 775     query->magic = 0;

 776     isc_mem_put(query->mctx, query, sizeof(*query));

 777     queryp = NULL;

 778

 779     if (empty)

 780         empty_bucket(res);

 781 }

 

We have found an upstream patch which seems to solve the issue, at least in initial testing:

https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commitdiff;h=c03fe78ef59b2373233db1a7b568cc2000d6d3b4

 

It seems like this patch was created not so long time after one of the commits, that were later backported to WRL5. Can you check if this patch is applicable in WRL5 (we believe so)? Possibly also if there are other patches affecting the backported commits?

Other Downloads

• Wind River Linux 6.0.0.30
• Wind River Linux 6.0.0.31
• Wind River Linux 6.0.0.32
• Wind River Linux 6.0.0.33
• Wind River Linux 6.0.0.34
• Wind River Linux 6.0.0.35
• Wind River Linux 6.0.0.36
• Wind River Linux 6.0.0.37
• Wind River Linux 6.0.0.38