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sock: Correct error checking condition for (assign|release)_proto_idx()

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[ Upstream commit faeefc173be40512341b102cf1568aa0b6571acd ]

(assign|release)_proto_idx() wrongly check find_first_zero_bit() failure
by condition '(prot->inuse_idx == PROTO_INUSE_NR - 1)' obviously.

Fix by correcting the condition to '(prot->inuse_idx == PROTO_INUSE_NR)'

Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250410-fix_net-v2-1-d69e7c5739a4@quicinc.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zijun Hu 2025-04-10 09:01:27 +08:00 • committed by Greg Kroah-Hartman
commit 7e372262cd
1 changed files with 2 additions and 2 deletions
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4
net/core/sock.c
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@ -3370,7 +3370,7 @@ static int assign_proto_idx(struct proto *prot)
{
prot->inuse_idx = find_first_zero_bit(proto_inuse_idx, PROTO_INUSE_NR);
if (unlikely(prot->inuse_idx == PROTO_INUSE_NR - 1)) {
if (unlikely(prot->inuse_idx == PROTO_INUSE_NR)) {
pr_err("PROTO_INUSE_NR exhausted\n");
return -ENOSPC;
}
@ -3381,7 +3381,7 @@ static int assign_proto_idx(struct proto *prot)
static void release_proto_idx(struct proto *prot)
{
if (prot->inuse_idx != PROTO_INUSE_NR - 1)
if (prot->inuse_idx != PROTO_INUSE_NR)
clear_bit(prot->inuse_idx, proto_inuse_idx);
}
#else