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ext2: Check return value from ext2_get_group_desc()

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ext2_get_group_desc() can return NULL if there is some error. This
usually means there is some programming error in the ext2 driver itself
but let's be defensive and handle that case.

Coverity-id: 115628
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2016-08-09 10:07:52 +02:00
parent 81abf25258
commit f7a1c358e5
1 changed files with 5 additions and 0 deletions
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5
fs/ext2/ialloc.c
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@ -465,6 +465,11 @@ struct inode *ext2_new_inode(struct inode *dir, umode_t mode,
for (i = 0; i < sbi->s_groups_count; i++) {
gdp = ext2_get_group_desc(sb, group, &bh2);
if (!gdp) {
if (++group == sbi->s_groups_count)
group = 0;
continue;
}
brelse(bitmap_bh);
bitmap_bh = read_inode_bitmap(sb, group);
if (!bitmap_bh) {