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softmmu-semi: fix lock_user* functions not to deref NULL upon OOM 

Return NULL upon malloc failure.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jim Meyering 2012-08-22 13:55:56 +02:00 committed by Anthony Liguori
parent 396bef4b38
commit 15d9e3bc6a
1 changed files with 4 additions and 1 deletions
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5
softmmu-semi.h
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@ -40,7 +40,7 @@ static void *softmmu_lock_user(CPUArchState *env, uint32_t addr, uint32_t len,
uint8_t *p;
/* TODO: Make this something that isn't fixed size. */
p = malloc(len);
if (copy)
if (p && copy)
cpu_memory_rw_debug(env, addr, p, len, 0);
return p;
}
@ -52,6 +52,9 @@ static char *softmmu_lock_user_string(CPUArchState *env, uint32_t addr)
uint8_t c;
/* TODO: Make this something that isn't fixed size. */
s = p = malloc(1024);
if (!s) {
return NULL;
}
do {
cpu_memory_rw_debug(env, addr, &c, 1, 0);
addr++;