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Commit 951744fe authored by Dmitriy Monakhov's avatar Dmitriy Monakhov Committed by Linus Torvalds
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udf: possible null pointer dereference while load_partition 



sb_read may return NULL, let's explicitly check it.

Signed-off-by: default avatarDmitriy Monakhov <dmonakhov@openvz.org>
Cc: Jan Kara <jack@ucw.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 31170b6a

fs/udf/super.c

+2 −0
Original line number Diff line number Diff line
@@ -1403,6 +1403,8 @@ udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) 


					pos = udf_block_map(UDF_SB_VAT(sb), 0);

					bh = sb_bread(sb, pos);

					if (!bh)

						return 1;

					UDF_SB_TYPEVIRT(sb,i).s_start_offset =

						le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +

							udf_ext0_offset(UDF_SB_VAT(sb));