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 <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>wifi-calibration
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8e575c50a1
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aa179935ed
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@ -982,7 +982,8 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
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}
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}
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check_lba:
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check_lba:
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end_lba = dev->transport->get_blocks(dev) + 1;
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end_lba = dev->transport->get_blocks(dev) + 1;
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if (cmd->t_task_lba + sectors > end_lba) {
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if (((cmd->t_task_lba + sectors) < cmd->t_task_lba) ||
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((cmd->t_task_lba + sectors) > end_lba)) {
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pr_err("cmd exceeds last lba %llu "
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pr_err("cmd exceeds last lba %llu "
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"(lba %llu, sectors %u)\n",
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"(lba %llu, sectors %u)\n",
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end_lba, cmd->t_task_lba, sectors);
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end_lba, cmd->t_task_lba, sectors);
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