Commit bf40c926 authored by Namjae Jeon's avatar Namjae Jeon Committed by Theodore Ts'o
Browse files

ext4: fix potential null pointer dereference in ext4_free_inode

Fix potential null pointer dereferencing problem caused by e43bb4e6


("ext4: decrement free clusters/inodes counters when block group declared bad")
Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: default avatarAshish Sangwan <a.sangwan@samsung.com>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
Reviewed-by: default avatarLukas Czerner <lczerner@redhat.com>
parent 3f1f9b85
......@@ -338,7 +338,7 @@ out:
fatal = err;
} else {
ext4_error(sb, "bit already cleared for inode %lu", ino);
if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
if (gdp && !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
int count;
count = ext4_free_inodes_count(sb, gdp);
percpu_counter_sub(&sbi->s_freeinodes_counter,
......
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