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authorJing Peng <pj.hades@gmail.com>2022-05-31 11:20:31 -0400
committerMatthew Smith <mgsmith@netgate.com>2022-08-16 19:32:14 +0000
commit5c9f9968de63fa627b4a72b344df36cdc686d18a (patch)
tree3e191980cbe4e3d4f7da3f01709947b81bf5171d /build-root
parentb5339c64d1100463058d1719ea23e0af353ce697 (diff)
nat: fix potential out-of-bound worker array index
In several NAT submodules, the number of available ports (0xffff - 1024) may not be divisible by the number of workers, so port_per_thread is determined by integer division, which is the floor of the quotient. Later when a worker index is needed, dividing the port with port_per_thread may yield an out-of-bound array index into the workers array. As an example, assume 2 workers are configured, then port_per_thread will be (0xffff - 1024) / 2, which is 32255. When we compute a worker index with port 0xffff, we get (0xffff - 1024) / 32255, which is 2, but since we only have 2 workers, only 0 and 1 are valid indices. This patch fixes the problem by adding a modulo at the end of the division. Type: fix Signed-off-by: Jing Peng <pj.hades@gmail.com> Change-Id: Ieae3d5faf716410422610484a68222f1c957f3f8
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