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Properly check for mmap failure

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graindcafe 2021-12-27 12:06:13 +01:00
parent e35fa50e48
commit d46323883c
1 changed files with 2 additions and 2 deletions
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4
lib/quirc.c
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@ -75,7 +75,7 @@ int quirc_resize(struct quirc *q, int w, int h)
* mmap will ensure memory page alignment
*/
image = mmap(NULL, newdim, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (!image)
if (image == MAP_FAILED)
goto fail;
memset(image, 0, newdim);
@ -136,7 +136,7 @@ int quirc_resize(struct quirc *q, int w, int h)
return 0;
/* NOTREACHED */
fail:
if (image != NULL)
if (image != NULL && image != MAP_FAILED)
munmap(image, newdim);
free(pixels);
free(vars);