Pasquale Puzio created TS-2825:
----------------------------------
Summary: Segmentation fault on POST request transformation
Key: TS-2825
URL: https://issues.apache.org/jira/browse/TS-2825
Project: Traffic Server
Issue Type: Bug
Components: Core, HTTP, Lua, Plugins, TS API
Reporter: Pasquale Puzio
I'm trying to write a simple encryption/decryption plugin for Apache Traffic
Server. The plugin should transform requests/responses in order to
encrypt/decrypt them. I decided to write the plugin in LUA (using the ts-lua
plugin available here https://github.com/portl4t/ts-lua)
function encrypt(data, eos)
if (data == '') then
return data, eos
end
if (eos == 1) then
ts.debug('End of Stream')
end
return data, eos
end
function do_remap()
ts.debug('do_remap')
if (ts.client_request.get_method() == 'POST') then
ts.hook(TS_LUA_REQUEST_TRANSFORM, encrypt)
end
ts.http.resp_cache_transformed(0)
ts.http.resp_cache_untransformed(0)
return 0
end
Everything works fine for GET and DELETE requests, but when I send a POST
chunked-encoded request, ATS crashes almost every time.
if I don't activate the request transformation hook, the chunked request is
forwarded perfectly. Most of the time, if one request is forwarded succesfully,
the one after crashes.
Here is the stack trace:
[May 20 13:16:28.105] Server {0x7f045a1c1700} DEBUG: (http_redirect)
[HttpSM::do_redirect]
[May 20 13:16:28.105] Server {0x7f045a1c1700} DEBUG: (http_redirect)
[HttpTunnel::deallocate_postdata_copy_buffers]
NOTE: Traffic Server received Sig 11: Segmentation fault
bin/traffic_server - STACK TRACE:
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f045cd29cb0]
bin/traffic_server(_ZN6HttpSM17handle_api_returnEv+0x171)[0x5c274f]
bin/traffic_server(_ZN6HttpSM17state_api_calloutEiPv+0x883)[0x5c24cf]
bin/traffic_server(_ZN6HttpSM23do_api_callout_internalEv+0x1b7)[0x5ceaef]
bin/traffic_server(_ZN6HttpSM14do_api_calloutEv+0x26)[0x5dc18e]
bin/traffic_server(_ZN6HttpSM14set_next_stateEv+0x12f9)[0x5d6a19]
bin/traffic_server(_ZN6HttpSM32call_transact_and_set_next_stateEPFvPN12HttpTransact5StateEE+0x1ba)[0x5d5718]
bin/traffic_server(_ZN6HttpSM36state_common_wait_for_transform_readEP17HttpTransformInfoMS_FiiPvEiS2_+0x39b)[0x5c1a11]
bin/traffic_server(_ZN6HttpSM37state_request_wait_for_transform_readEiPv+0x1e1)[0x5c1483]
bin/traffic_server(_ZN6HttpSM12main_handlerEiPv+0x333)[0x5c5eeb]
bin/traffic_server(_ZN12Continuation11handleEventEiPv+0x68)[0x4f06b2]
bin/traffic_server(_ZN17TransformTerminus12handle_eventEiPv+0x2f6)[0x538d2a]
bin/traffic_server(_ZN12Continuation11handleEventEiPv+0x68)[0x4f06b2]
bin/traffic_server(_ZN7EThread13process_eventEP5Eventi+0x11e)[0x7537e2]
bin/traffic_server(_ZN7EThread7executeEv+0xc9)[0x753a27]
bin/traffic_server[0x752ca7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f045cd21e9a]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f045c0383fd]
Segmentation fault (core dumped)
I've already tried to use one of the example plugins for request transformation
and I still have the same problem. The only way to make the problem disappear
is to avoid request transformation.
Is there something wrong in the way I'm transforming requests? What does this
segmentation fault depend on?
Thanks
--
This message was sent by Atlassian JIRA
(v6.2#6252)
