diff mbox series

[net-next,v2,03/11] net: mctp: make key lookups match the ANY address on either local or peer

Message ID b0bc81c41916f47a4a61cf028a57e0c4a45c2dfc.1708335994.git.jk@codeconstruct.com.au (mailing list archive)
State Accepted
Commit fc944ecc4f1a287882d90441360a0ba61d45fd8b
Delegated to: Netdev Maintainers
Headers show
Series MCTP core protocol updates, minor fixes & tests | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 944 this patch: 944
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 958 this patch: 958
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 961 this patch: 961
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 26 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-02-22--00-00 (tests: 1455)

Commit Message

Jeremy Kerr Feb. 19, 2024, 9:51 a.m. UTC 
We may have an ANY address in either the local or peer address of a
sk_key, and may want to match on an incoming daddr or saddr being ANY.

Do this by altering the conflicting-tag lookup to also accept ANY as
the local/peer address.

We don't want mctp_address_matches to match on the requested EID being
ANY, as that is a specific lookup case on packet input.

Reported-by: Eric Chuang <echuang@google.com>
Reported-by: Anthony <anthonyhkf@google.com>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
---
 net/mctp/route.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/net/mctp/route.c b/net/mctp/route.c
index 95f59508543b..b7ec64cd8b40 100644
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -113,7 +113,7 @@  static bool mctp_key_match(struct mctp_sk_key *key, mctp_eid_t local,
 	if (!mctp_address_matches(key->local_addr, local))
 		return false;
 
-	if (key->peer_addr != peer)
+	if (!mctp_address_matches(key->peer_addr, peer))
 		return false;
 
 	if (key->tag != tag)
@@ -672,8 +672,16 @@  struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
 		if (tmp->tag & MCTP_HDR_FLAG_TO)
 			continue;
 
-		if (!(mctp_address_matches(tmp->peer_addr, peer) &&
-		      mctp_address_matches(tmp->local_addr, local)))
+		/* Since we're avoiding conflicting entries, match peer and
+		 * local addresses, including with a wildcard on ANY. See
+		 * 'A note on key allocations' for background.
+		 */
+		if (peer != MCTP_ADDR_ANY &&
+		    !mctp_address_matches(tmp->peer_addr, peer))
+			continue;
+
+		if (local != MCTP_ADDR_ANY &&
+		    !mctp_address_matches(tmp->local_addr, local))
 			continue;
 
 		spin_lock(&tmp->lock);