CVE-2022-21546

In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix WRITE_SAME No Data Buffer crash In newer version of the SBC specs, we have a NDOB bit that indicates there is no data buffer that gets written out. If this bit is set using commands like "sg_write_same --ndob" we will crash in target_core_iblock/file's execute_write_same handlers when we go to access the se_cmd->t_data_sg because its NULL. This patch adds a check for the NDOB bit in the common WRITE SAME code because we don't support it. And, it adds a check for zero SG elements in each handler in case the initiator tries to send a normal WRITE SAME with no data buffer.

• linux linux kernel (< 5.4.294) • linux linux kernel (>= 5.5 < 5.10.238) • linux linux kernel (>= 5.11 < 5.15.182) • linux linux kernel (>= 5.16 < 5.19) • linux linux kernel 5.19 • debian debian linux 11.0