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BR3079550: NASM crash on run-time for OMF output format

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We could have accessed malloc'ed data on external symbols
in obj and ieee output formats. Fix it by using nasm_zalloc.

Reported-by: Jiri Malak
Patch-by: Jiri Malak
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov
2010-10-02 01:21:00 +04:00
parent 71787fda1b
commit 2c157002f2
2 changed files with 4 additions and 4 deletions
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4
output/outieee.c
View File

@@ -372,7 +372,7 @@ static void ieee_deflabel(char *name, int32_t segment,
i = segment / 2; i = segment / 2;
eb = ebhead; eb = ebhead;
if (!eb) { if (!eb) {
eb = *ebtail = nasm_malloc(sizeof(*eb)); eb = *ebtail = nasm_zalloc(sizeof(*eb));
eb->next = NULL; eb->next = NULL;
ebtail = &eb->next; ebtail = &eb->next;
} }
@@ -380,7 +380,7 @@ static void ieee_deflabel(char *name, int32_t segment,
if (eb && eb->next) if (eb && eb->next)
eb = eb->next; eb = eb->next;
else { else {
eb = *ebtail = nasm_malloc(sizeof(*eb)); eb = *ebtail = nasm_zalloc(sizeof(*eb));
eb->next = NULL; eb->next = NULL;
ebtail = &eb->next; ebtail = &eb->next;
} }

4
output/outobj.c
View File

@@ -993,7 +993,7 @@ static void obj_deflabel(char *name, int32_t segment,
i = segment / 2; i = segment / 2;
eb = ebhead; eb = ebhead;
if (!eb) { if (!eb) {
eb = *ebtail = nasm_malloc(sizeof(*eb)); eb = *ebtail = nasm_zalloc(sizeof(*eb));
eb->next = NULL; eb->next = NULL;
ebtail = &eb->next; ebtail = &eb->next;
} }
@@ -1001,7 +1001,7 @@ static void obj_deflabel(char *name, int32_t segment,
if (eb && eb->next) if (eb && eb->next)
eb = eb->next; eb = eb->next;
else { else {
eb = *ebtail = nasm_malloc(sizeof(*eb)); eb = *ebtail = nasm_zalloc(sizeof(*eb));
eb->next = NULL; eb->next = NULL;
ebtail = &eb->next; ebtail = &eb->next;
} }