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MdeModulePkg: Add NULL pointer check for RegularExpressionDxe.

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Refine code by adding NULL pointer check to avoid potential NULL pointer dereferenced.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19271 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Qiu Shumin
2015-12-15 08:40:55 +00:00
committed by shenshushi
parent 00d1c2a35e
commit b0c2b79738
7 changed files with 50 additions and 4 deletions
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7
MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma/st.c
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@@ -156,6 +156,7 @@ st_init_table_with_size(type, size)
size = new_size(size); /* round up to prime number */
tbl = alloc(st_table);
CHECK_NULL_RETURN(tbl);
tbl->type = type;
tbl->num_entries = 0;
tbl->num_bins = size;
@@ -267,6 +268,9 @@ do {\
}\
\
entry = alloc(st_table_entry);\
if (entry == NULL) {\
break;\
}\
\
entry->hash = hash_val;\
entry->key = key;\
@@ -321,6 +325,9 @@ rehash(table)
new_num_bins = new_size(old_num_bins+1);
new_bins = (st_table_entry**)Calloc(new_num_bins, sizeof(st_table_entry*));
if (new_bins == NULL) {
return;
}
for(i = 0; i < old_num_bins; i++) {
ptr = table->bins[i];