netfilter: nf_tables: fix memory leak in nf_tables_newrule()

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[ Upstream commit d077e8119d ]

In nf_tables_newrule(), if nft_use_inc() fails, the function jumps to
the err_release_rule label without freeing the allocated flow, leading
to a memory leak.

Fix this by adding a new label err_destroy_flow and jumping to it when
nft_use_inc() fails. This ensures that the flow is properly released
in this error case.

Fixes: 1689f25924 ("netfilter: nf_tables: report use refcount overflow")
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Zilin Guan 2025-12-24 12:48:26 +00:00 • committed by Greg Kroah-Hartman

parent cdafa52ad3

commit e1a436981a

1 changed files with 2 additions and 1 deletions

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net/netfilter/nf_tables_api.c

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