netfilter: nf_tables: disallow anonymous set with timeout flag

commit 16603605b667b70da974bea8216c93e7db043bf1 upstream.

Anonymous sets are never used with timeout from userspace, reject this.
Exception to this rule is NFT_SET_EVAL to ensure legacy meters still work.

Cc: [email protected]
Fixes: 761da2935d6e ("netfilter: nf_tables: add set timeout API support")
Reported-by: lonial con <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

BUG=b/333551897
TEST=presubmit
RELEASE_NOTE=Fixed CVE-2024-26642 in the Linux kernel.

cos-patch: security-moderate
Change-Id: I2e59e16a2e156963ba3646bc3e3130238e401210
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/69139
Tested-by: Cusky Presubmit Bot <[email protected]>
Main-Branch-Verified: Cusky Presubmit Bot <[email protected]>
Reviewed-by: Oleksandr Tymoshenko <[email protected]>
1 file changed