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Fixed a memory leak when only a part of a PBUF_POOL chain could be allocated.

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likewise 2003-06-04 19:09:11 +00:00
parent 9ed2b7e03c
commit 326b8ff728
1 changed files with 6 additions and 2 deletions
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8
src/core/pbuf.c
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@ -251,6 +251,8 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
p->len = length > PBUF_POOL_BUFSIZE - offset? PBUF_POOL_BUFSIZE - offset: length; p->len = length > PBUF_POOL_BUFSIZE - offset? PBUF_POOL_BUFSIZE - offset: length;
/* set pbuf type */ /* set pbuf type */
p->flags = PBUF_FLAG_POOL; p->flags = PBUF_FLAG_POOL;
/* set reference count (needed here in case we fail) */
p->ref = 1;
/* now allocate the tail of the pbuf chain */ /* now allocate the tail of the pbuf chain */
@ -266,11 +268,12 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
#ifdef PBUF_STATS #ifdef PBUF_STATS
++lwip_stats.pbuf.err; ++lwip_stats.pbuf.err;
#endif /* PBUF_STATS */ #endif /* PBUF_STATS */
/* bail out unsuccesfully */ /* free chain so far allocated */
pbuf_free(p); pbuf_free(p);
/* bail out unsuccesfully */
return NULL; return NULL;
} }
/*q->next = NULL;*/ q->next = NULL;
/* make previous pbuf point to this pbuf */ /* make previous pbuf point to this pbuf */
r->next = q; r->next = q;
/* set total length of this pbuf and next in chain */ /* set total length of this pbuf and next in chain */
@ -326,6 +329,7 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
LWIP_ASSERT("pbuf_alloc: erroneous flag", 0); LWIP_ASSERT("pbuf_alloc: erroneous flag", 0);
return NULL; return NULL;
} }
/* set reference count */
p->ref = 1; p->ref = 1;
return p; return p;
} }