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[ Upstream commit9990889be1] We may hold an extra reference on a socket if a tag allocation fails: we optimistically allocate the sk_key, and take a ref there, but do not drop if we end up not using the allocated key. Ensure we're dropping the sock on this failure by doing a proper unref rather than directly kfree()ing. Fixes:de8a6b15d9("net: mctp: add an explicit reference from a mctp_sk_key to sock") Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/ce9b61e44d1cdae7797be0c5e3141baf582d23a0.1707983487.git.jk@codeconstruct.com.au Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>