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Commit 1b1baff6 authored by Namjae Jeon's avatar Namjae Jeon Committed by Jan Kara
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UDF: Fix a null pointer dereference in udf_sb_free_partitions 



This patch fixes a regression caused by commit bff943af "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: default avatarJames Hogan <james@albanarts.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 avatarJan Kara <jack@suse.cz>
parent 7e2fb2d7

fs/udf/super.c

+2 −1
Original line number Diff line number Diff line
@@ -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);