commit cc282f73bc0cbdf3ee7af2f2d3a2ef4e6b19242d
author Mahanta Jambigi <mjambigi@linux.ibm.com> Tue Sep 02 10:20:41 2025 +0200
committer Jakub Kicinski <kuba@kernel.org> Wed Sep 03 17:01:07 2025 -0700
tree 17e69e88a7af920b5b2c9bf32234f11fe3846402
parent a51160f8da850a65afbf165f5bbac7ffb388bf74

net/smc: Remove validation of reserved bits in CLC Decline message

Currently SMC code is validating the reserved bits while parsing the incoming
CLC decline message & when this validation fails, its treated as a protocol
error. As a result, the SMC connection is terminated instead of falling back to
TCP. As per RFC7609[1] specs we shouldn't be validating the reserved bits that
is part of CLC message. This patch fixes this issue.

CLC Decline message format can viewed here[2].

[1] https://datatracker.ietf.org/doc/html/rfc7609#page-92
[2] https://datatracker.ietf.org/doc/html/rfc7609#page-105

Fixes: 8ade200c269f ("net/smc: add v2 format of CLC decline message")
Signed-off-by: Mahanta Jambigi <mjambigi@linux.ibm.com>
Reviewed-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Link: https://patch.msgid.link/20250902082041.98996-1-mjambigi@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>