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| author | Mahanta Jambigi <mjambigi@linux.ibm.com> | 2025-09-02 10:20:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-09 18:58:13 +0200 |
| commit | b3bab397a377edc4345c67bd41cdca850e3cae2d (patch) | |
| tree | 47c0d3e5809765f342e0ad8857e3dd537d9af2ce /net | |
| parent | 8b3e9f55674334f224ce0f1af4ba52438b29531a (diff) | |
| download | linux-b3bab397a377edc4345c67bd41cdca850e3cae2d.tar.gz linux-b3bab397a377edc4345c67bd41cdca850e3cae2d.tar.bz2 linux-b3bab397a377edc4345c67bd41cdca850e3cae2d.zip | |
net/smc: Remove validation of reserved bits in CLC Decline message
[ Upstream commit cc282f73bc0cbdf3ee7af2f2d3a2ef4e6b19242d ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/smc/smc_clc.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 521f5df80e10..8a794333e992 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -426,8 +426,6 @@ smc_clc_msg_decl_valid(struct smc_clc_msg_decline *dclc) { struct smc_clc_msg_hdr *hdr = &dclc->hdr; - if (hdr->typev1 != SMC_TYPE_R && hdr->typev1 != SMC_TYPE_D) - return false; if (hdr->version == SMC_V1) { if (ntohs(hdr->length) != sizeof(struct smc_clc_msg_decline)) return false; |