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rxrpc: Fix leak of released call in recvmsg(MSG_PEEK)

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Fix rxrpc_recvmsg() to also drop the ref it holds on an already-released
call if MSG_PEEK is in force (the function holds a ref on the call
irrespective of whether MSG_PEEK is specified or not).

Fixes: 962fb1f651 ("rxrpc: Fix recv-recv race of completed call")
Link: https://sashiko.dev/#/patchset/20260616155749.2125907-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Jeffrey Altman <jaltman@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: stable@kernel.org
Link: https://patch.msgid.link/20260624163819.3017002-11-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Howells
2026-06-24 17:38:17 +01:00
committed by Jakub Kicinski
parent e66f8f32f5
commit 4bdb9e471f
1 changed files with 1 additions and 2 deletions
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3
net/rxrpc/recvmsg.c
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@@ -529,8 +529,7 @@ int rxrpc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
rxrpc_see_call(call, rxrpc_call_see_already_released);
mutex_unlock(&call->user_mutex);
if (!(flags & MSG_PEEK))
rxrpc_put_call(call, rxrpc_call_put_recvmsg);
rxrpc_put_call(call, rxrpc_call_put_recvmsg);
goto try_again;
}