scsi: bsg: Pass reply_len to bsg_setup_queue() to fit UFS ARPMB replies

Overview

In the Linux kernel, the following vulnerability has been resolved:

scsi: bsg: Pass reply_len to bsg_setup_queue() to fit UFS ARPMB replies

bsg-lib allocates a 96-byte (SCSI_SENSE_BUFFERSIZE) reply buffer per job, but struct ufs_rpmb_reply is 104 bytes: a 40-byte struct ufs_bsg_reply followed by a 64-byte EHS. When an Advanced RPMB command returns an EHS, ufshcd_advanced_rpmb_req_handler() copies it right after the 40-byte header and writes 8 bytes past the end of the buffer.

Let each BSG transport pass its reply buffer size to bsg_setup_queue() and have ufs_bsg request sizeof(struct ufs_rpmb_reply), so the full reply reaches user space. Other transports keep SCSI_SENSE_BUFFERSIZE.

Affected

• Linux >= 6ff265fc5ef660499e0edc4641647e99eed3f519 < 2effbe746452c108188f85a6951f2b0b65653840
• Linux >= 6ff265fc5ef660499e0edc4641647e99eed3f519 < 7a755f6d47b811d3abd93c1642ce5e63894540b8
• Linux >= 6ff265fc5ef660499e0edc4641647e99eed3f519 < ec6b083915e8146e147314a5f4f1285d07b57bfc
• Linux 6.3

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.