Module: kamailio
Branch: master
Commit: b58a55da1a43f1b2d3b1f0b831fcb639c57a66b9
URL: 
https://github.com/kamailio/kamailio/commit/b58a55da1a43f1b2d3b1f0b831fcb639c57a66b9

Author: Daniel-Constantin Mierla <[email protected]>
Committer: Daniel-Constantin Mierla <[email protected]>
Date: 2015-09-21T17:01:18+02:00

mem: f_malloc - proper inserting of last free large fragment

- reported by Juha Heinanen

---

Modified: mem/f_malloc.c

---

Diff:  
https://github.com/kamailio/kamailio/commit/b58a55da1a43f1b2d3b1f0b831fcb639c57a66b9.diff
Patch: 
https://github.com/kamailio/kamailio/commit/b58a55da1a43f1b2d3b1f0b831fcb639c57a66b9.patch

---

diff --git a/mem/f_malloc.c b/mem/f_malloc.c
index b0376eb..2221d54 100644
--- a/mem/f_malloc.c
+++ b/mem/f_malloc.c
@@ -211,27 +211,42 @@ static inline void fm_insert_free(struct fm_block* qm, 
struct fm_frag* frag)
 {
        struct fm_frag* f;
        int hash;
+       int after;
        
        hash=GET_HASH(frag->size);
        f=qm->free_hash[hash].first;
        if (frag->size > F_MALLOC_OPTIMIZE){ /* because of '<=' in GET_HASH,
                                                                                
        (different from 0.8.1[24] on
                                                                                
         purpose --andrei ) */
+               after = 0;
                /* large fragments list -- add at a position ordered by size */
-               for(; f && f->u.nxt_free!=qm->last_frag; f=f->u.nxt_free){
+               for(; f; f=f->u.nxt_free){
                        if (frag->size <= f->size) break;
+                       if(f->u.nxt_free==qm->last_frag) {
+                               /*size greater than last frag in slot*/
+                               after = 1;
+                               break;
+                       }
                }
        
-               /*insert frag before f*/
-               frag->u.nxt_free = f;
                if(f) {
-                       frag->prv_free=f->prv_free;
-                       if(f->prv_free) f->prv_free->u.nxt_free = frag;
-                       if(qm->free_hash[hash].first==f) 
qm->free_hash[hash].first = frag;
+                       if(after) {
+                               /*insert frag after f*/
+                               frag->prv_free=f;
+                               f->u.nxt_free=frag;
+                               frag->u.nxt_free = qm->last_frag;
+                       } else {
+                               /*insert frag before f*/
+                               frag->u.nxt_free = f;
+                               frag->prv_free=f->prv_free;
+                               if(f->prv_free) f->prv_free->u.nxt_free = frag;
+                               if(qm->free_hash[hash].first==f) 
qm->free_hash[hash].first = frag;
+                       }
                } else {
                        /* to be only one in slot */
                        qm->free_hash[hash].first = frag;
                        frag->prv_free=0;
+                       frag->u.nxt_free = qm->last_frag;
                }
        } else {
                /* fixed fragment size list -- add first */


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