From: Nicholas Bellinger Date: Fri, 13 Feb 2015 22:27:40 +0000 (+0000) Subject: target: Check for LBA + sectors wrap-around in sbc_parse_cdb X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aa179935edea9a64dec4b757090c8106a3907ffa;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git target: Check for LBA + sectors wrap-around in sbc_parse_cdb This patch adds a check to sbc_parse_cdb() in order to detect when an LBA + sector vs. end-of-device calculation wraps when the LBA is sufficently large enough (eg: 0xFFFFFFFFFFFFFFFF). Cc: Martin Petersen Cc: Christoph Hellwig Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index b26b52f441a1..17259c05450e 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -982,7 +982,8 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) } check_lba: end_lba = dev->transport->get_blocks(dev) + 1; - if (cmd->t_task_lba + sectors > end_lba) { + if (((cmd->t_task_lba + sectors) < cmd->t_task_lba) || + ((cmd->t_task_lba + sectors) > end_lba)) { pr_err("cmd exceeds last lba %llu " "(lba %llu, sectors %u)\n", end_lba, cmd->t_task_lba, sectors);