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nvram: refuse to open NVRAM for writing if it's too big to be handled 

Otherwise writing anything will result in loosing data.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45565 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Rafał Miłecki 2015-04-22 19:07:19 +00:00
parent 41ba634460
commit 41b471d235
1 changed files with 2 additions and 2 deletions
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4
package/utils/nvram/src/nvram.c
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@ -389,8 +389,8 @@ nvram_handle_t * nvram_open(const char *file, int rdonly)
header = nvram_header(h); header = nvram_header(h);
if( header->magic == NVRAM_MAGIC ) if (header->magic == NVRAM_MAGIC &&
{ (rdonly || header->len < NVRAM_SPACE)) {
_nvram_rehash(h); _nvram_rehash(h);
free(mtd); free(mtd);
return h; return h;