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Commit 70030929 authored by OGAWA Hirofumi's avatar OGAWA Hirofumi
Browse files

fat: Fix possible null deref in fat_cache_add() 



Reported-by: default avatar <dame_eugene@mail.ru>
Signed-off-by: default avatarOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
parent 384f5c96

fs/fat/cache.c

+7 −0
Original line number Diff line number Diff line
@@ -151,6 +151,13 @@ static void fat_cache_add(struct inode *inode, struct fat_cache_id *new) 
			spin_unlock(&MSDOS_I(inode)->cache_lru_lock);



			tmp = fat_cache_alloc(inode);

			if (!tmp) {

				spin_lock(&MSDOS_I(inode)->cache_lru_lock);

				MSDOS_I(inode)->nr_caches--;

				spin_unlock(&MSDOS_I(inode)->cache_lru_lock);

				return;

			}



			spin_lock(&MSDOS_I(inode)->cache_lru_lock);

			cache = fat_cache_merge(inode, new);

			if (cache != NULL) {