fs: ext4fs: Fix: Data abort in ext4fs_log_gdt()
Return ENOMEM in ext4fs_log_gdt when number of blocks per gdt is more than
number of allocated journal entries.
Signed-off-by: Tony Dinh <mibodhi@gmail.com>
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
index 02c4ac2..868a2c1 100644
--- a/fs/ext4/ext4_journal.c
+++ b/fs/ext4/ext4_journal.c
@@ -131,6 +131,13 @@
struct ext_filesystem *fs = get_fs();
short i;
long int var = fs->gdtable_blkno;
+
+ /* Make sure there is enough journal entries */
+ if (fs->no_blk_pergdt > MAX_JOURNAL_ENTRIES) {
+ log_err("*** Not enough journal entries allocated\n");
+ return -ENOMEM;
+ }
+
for (i = 0; i < fs->no_blk_pergdt; i++) {
journal_ptr[gindex]->buf = zalloc(fs->blksz);
if (!journal_ptr[gindex]->buf)