[sr-dev] git:4.1: core: safety check for double free in q_malloc as in f_malloc

Module: sip-router Branch: 4.1 Commit: eaeb74f5b6af5be13f88de93729998f13e9a06b7 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=eaeb74f… Author: Daniel-Constantin Mierla <miconda(a)gmail.com> Committer: Daniel-Constantin Mierla <miconda(a)gmail.com> Date: Wed Dec 11 09:49:52 2013 +0100 core: safety check for double free in q_malloc as in f_malloc (cherry picked from commit 943a5941f5ab479803fb30e19e9fa607f0f0fe14) --- mem/q_malloc.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/mem/q_malloc.c b/mem/q_malloc.c index 50acab9..8c36d03 100644 --- a/mem/q_malloc.c +++ b/mem/q_malloc.c @@ -473,6 +473,12 @@ void qm_free(struct qm_block* qm, void* p) MDBG("qm_free: freeing frag. %p alloc'ed from %s: %s(%ld)\n", f, f->file, f->func, f->line); #endif + if (unlikely(f->u.is_free)){ + LM_INFO("freeing a free fragment (%p/%p) - ignore\n", + f, p); + return; + } + size=f->size; qm->used-=size; qm->real_used-=size;