Piteball/android_kernel_google_msm
1
0
Fork 0
mirror of https://github.com/followmsi/android_kernel_google_msm.git synced 2024-11-06 23:17:41 +00:00
Code Issues Projects Releases Wiki Activity

ext4: fix a race which could leak memory in ext4_groupinfo_create_slab()

Browse source 
In ext4_groupinfo_create_slab, we create ext4_groupinfo_caches within
ext4_grpinfo_slab_create_mutex, but set it outside the lock, and there
does exist some case that we may create it twice and causes a memory
leak.  So set it before we call mutex_unlock.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Tao Ma 2011-07-11 18:26:01 -04:00 committed by Theodore Ts'o
parent 598dbdf243
commit 823ba01fc0
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
fs/ext4/mballoc.c
View file

@ -2404,14 +2404,14 @@ static int ext4_groupinfo_create_slab(size_t size)
slab_size, 0, SLAB_RECLAIM_ACCOUNT,
NULL);
ext4_groupinfo_caches[cache_index] = cachep;
mutex_unlock(&ext4_grpinfo_slab_create_mutex);
if (!cachep) {
printk(KERN_EMERG "EXT4: no memory for groupinfo slab cache\n");
return -ENOMEM;
}
ext4_groupinfo_caches[cache_index] = cachep;
return 0;
}