Description: scsi: sg: check length passed to SG_NEXT_CMD_LEN
References:
 https://gist.github.com/dvyukov/48ad14e84de45b0be92b7f0eda20ff1b
 https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.11/scsi-fixes&id=bf33f87dd04c371ea33feb821b60d63d754e3124
Notes:
 bwh> Introduced in 3.17 by 65c26a0f3969 "sg: relax 16 byte cdb restriction"
Bugs:
upstream: released (4.11-rc5) [bf33f87dd04c371ea33feb821b60d63d754e3124]
4.9-upstream-stable: released (4.9.21) [c2a869527865c35b605877f966cb5d514fdc5fbb]
3.16-upstream-stable: N/A "Range check never removed"
3.2-upstream-stable: N/A "Range check never removed"
sid: released (4.9.18-1) [bugfix/all/scsi-sg-check-length-passed-to-sg_next_cmd_len.patch]
3.16-jessie-security: N/A "Range check never removed"
3.2-wheezy-security: N/A "Range check never removed"