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fix: sigfpe if page_size == 0

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* exit if page_size is null
* set default page_size to 2048.
This commit is contained in:
Gilles Grandou 2011-02-17 22:57:19 +01:00
parent 8426206447
commit b4bf230bcb
1 changed files with 7 additions and 0 deletions
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7
abootimg.c
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@ -241,6 +241,9 @@ int check_boot_img_header(t_abootimg* img)
return 1;
unsigned page_size = img->header.page_size;
if (!page_size)
abort_printf("%s: Image page size is null\n", img->fname);
unsigned n = (img->header.kernel_size + page_size - 1) / page_size;
unsigned m = (img->header.ramdisk_size + page_size - 1) / page_size;
unsigned o = (img->header.second_size + page_size - 1) / page_size;
@ -452,6 +455,9 @@ void update_images(t_abootimg *img)
unsigned rsize = img->header.ramdisk_size;
unsigned ssize = img->header.second_size;
if (!page_size)
abort_printf("%s: Image page size is null\n", img->fname);
unsigned n = (ksize + page_size - 1) / page_size;
unsigned m = (rsize + page_size - 1) / page_size;
unsigned o = (ssize + page_size - 1) / page_size;
@ -825,6 +831,7 @@ t_abootimg* new_bootimg()
img->second_fname = "stage2.img";
memcpy(img->header.magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
img->header.page_size = 2048; // a sensible default page size
return img;
}