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author | 2022-05-31 11:20:31 -0400 | |
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committer | 2022-08-16 19:32:14 +0000 | |
commit | 5c9f9968de63fa627b4a72b344df36cdc686d18a (patch) | |
tree | 3e191980cbe4e3d4f7da3f01709947b81bf5171d /src/vppinfra/bihash_template.h | |
parent | b5339c64d1100463058d1719ea23e0af353ce697 (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
Diffstat (limited to 'src/vppinfra/bihash_template.h')
0 files changed, 0 insertions, 0 deletions