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UDF: Fix a null pointer dereference in udf_sb_free_partitions 

This patch fixes a regression caused by commit bff943af6f "udf: Fix memory
leak when mounting" due to which it was triggering a kernel null point
dereference in case of interrupted mount OR when allocating memory to
sbi->s_partmaps failed in function udf_sb_alloc_partition_maps.

Reported-and-tested-by: James Hogan <james@albanarts.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Namjae Jeon 2013-01-14 22:53:47 +01:00 committed by Jan Kara
parent 7e2fb2d7e6
commit 1b1baff6e5
1 changed files with 2 additions and 1 deletions
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3
fs/udf/super.c
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@ -307,7 +307,8 @@ static void udf_sb_free_partitions(struct super_block *sb)
{
struct udf_sb_info *sbi = UDF_SB(sb);
int i;
if (sbi->s_partmaps == NULL)
return;
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
kfree(sbi->s_partmaps);