From: Theodore Ts'o Date: Mon, 23 Nov 2009 01:48:34 +0000 (-0500) Subject: ext4: add check for wraparound in ext4_data_block_valid() X-Git-Tag: MMI-PSA29.97-13-9~25696^2~20 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1585d8d89ae1791d8f957731f5655700fbcc5664;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git ext4: add check for wraparound in ext4_data_block_valid() Signed-off-by: "Theodore Ts'o" --- diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c index dc79b75d8f70..4df8621ec31c 100644 --- a/fs/ext4/block_validity.c +++ b/fs/ext4/block_validity.c @@ -228,6 +228,7 @@ int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk, struct rb_node *n = sbi->system_blks.rb_node; if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) || + (start_blk + count < start_blk) || (start_blk + count > ext4_blocks_count(sbi->s_es))) return 0; while (n) {