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| author | Florian Westphal <fw@strlen.de> | 2023-08-12 13:05:16 +0200 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2023-08-16 00:05:15 +0200 |
| commit | 90e5b3462efa37b8bba82d7c4e63683856e188af (patch) | |
| tree | 501015f5991c64febb95b5d18946ef5fa0e15b65 /net/netfilter | |
| parent | 08713cb006b6f07434f276c5ee214fb20c7fd965 (diff) | |
| download | linux-90e5b3462efa37b8bba82d7c4e63683856e188af.tar.gz linux-90e5b3462efa37b8bba82d7c4e63683856e188af.tar.bz2 linux-90e5b3462efa37b8bba82d7c4e63683856e188af.zip | |
netfilter: nf_tables: deactivate catchall elements in next generation
When flushing, individual set elements are disabled in the next
generation via the ->flush callback.
Catchall elements are not disabled. This is incorrect and may lead to
double-deactivations of catchall elements which then results in memory
leaks:
WARNING: CPU: 1 PID: 3300 at include/net/netfilter/nf_tables.h:1172 nft_map_deactivate+0x549/0x730
CPU: 1 PID: 3300 Comm: nft Not tainted 6.5.0-rc5+ #60
RIP: 0010:nft_map_deactivate+0x549/0x730
[..]
? nft_map_deactivate+0x549/0x730
nf_tables_delset+0xb66/0xeb0
(the warn is due to nft_use_dec() detecting underflow).
Fixes: aaa31047a6d2 ("netfilter: nftables: add catch-all set element support")
Reported-by: lonial con <kongln9170@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c62227ae7746..6f31022cacc6 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7091,6 +7091,7 @@ static int nft_set_catchall_flush(const struct nft_ctx *ctx, ret = __nft_set_catchall_flush(ctx, set, &elem); if (ret < 0) break; + nft_set_elem_change_active(ctx->net, set, ext); } return ret; |