wangdasheng opened a new issue #5925:
URL: https://github.com/apache/apisix/issues/5925
### Issue description
The code is as follows:
local function fetch_old_token(token_name, ctx)
local token = core.request.get_uri_args(ctx)[token_name]
if token then
return token
end
token = core.request.header(ctx, token_name)
if token then
return token
end
local cookie, err = ck:new()
if not cookie then
return nil, err
end
local val, err = cookie:get(token_name)
if val then
return val
end
-- if token_name ~= "token" `then`
return fetch_old_token("token", ctx)
-- else
-- return nil
-- end
end
function _M.rewrite(conf, ctx)
fetch_old_token("abc",ctx)
end
### Environment
- apisix version (cmd: `apisix version`): 2.11.0
- OS (cmd: `uname -a`): Linux apisix-cd94c9475-5t5bc 4.14.105-19-0016 #1 SMP
Wed Sep 23 19:31:42 CST 2020 x86_64 Linux
- OpenResty / Nginx version (cmd: `nginx -V` or `openresty -V`):nginx
version: openresty/1.19.3.2 built by gcc 9.3.0 (Alpine 9.3.0)
- etcd version, if have (cmd: run `curl
http://127.0.0.1:9090/v1/server_info` to get the info from server-info API):
- apisix-dashboard version, if have:
- the plugin runner version, if the issue is about a plugin runner (cmd:
depended on the kind of runner):
- luarocks version, if the issue is about installation (cmd: `luarocks
--version`):
### Steps to reproduce
Customize the plug-in. There is infinite loop code in the plug-in
### Actual result
A single worker process will be forced to kill by the system after it is
full of memory, and it will start again and again
### Error log
[104251.437403] [ pid ] uid tgid total_vm rss nr_ptes nr_pmds
swapents oom_score_adj name
[104251.437521] [1691262] 0 1691262 242 1 3 2
0 -998 pause
[104251.437524] [1691425] 0 1691425 59891 4638 38 4
0 997 openresty
[104251.437530] [1990072] 0 1990072 420 288 5 3
0 997 sh
[104251.437532] [1992865] 0 1992865 428 317 6 3
0 997 sh
[104251.437535] [2052206] 0 2052206 401 248 6 3
0 997 top
[104251.437541] [2152543] 0 2152543 431 327 5 3
0 997 sh
[104251.437547] [2208994] 0 2208994 421 295 5 3
0 997 sh
[104251.437548] [2209020] 0 2209020 401 255 4 3
0 997 top
[104251.437550] [2244703] 65534 2244703 4154792 4098374 8018 19
0 997 openresty
[104251.437559] [2338135] 0 2338135 422 306 6 3
0 997 sh
[104251.437566] [2412171] 0 2412171 422 299 4 3
0 997 sh
[104251.437568] [2421621] 65534 2421621 64319 7656 30 4
0 997 openresty
[104251.437570] [2421622] 65534 2421622 59068 1313 17 3
0 997 openresty
[104251.437572] [2421623] 0 2421623 62302 5500 24 4
0 997 openresty
[104251.437574] [2441214] 0 2441214 398 217 4 3
0 997 tail
[104251.437577] [2454381] 0 2454381 401 245 4 3
0 997 top
[104251.437586] Memory cgroup out of memory: Kill process 2244703
(openresty) score 1993 or sacrifice child
[104251.440175] Killed process 2244703 (openresty) total-vm:16619168kB,
anon-rss:16387712kB, file-rss:5260kB, shmem-rss:524kB
### Expected result
It can prompt code problems through stack overflow, or set the maximum
execution depth of the stack
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