Haproxy segfaults if you pass the wrong argument type to a converter.
Example:
haproxy.cfg:
global
lua-load /tmp/haproxy.lua
frontend f1
mode http
bind :8000
default_backend b1
http-request lua.foo
backend b1
mode http
server s1 127.0.0.1:8080
haproxy.lua:
core.register_action("foo", { "http-req" }, function(txn)
txn.sc:ipmask(txn.f:src(), 24, 112)
end)
Result:
* thread #1, queue = 'com.apple.main-thread', stop reason =
EXC_BAD_ACCESS (code=1, address=0x18)
frame #0: 0x00007fffc9fcbf56
libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 182
libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell:
-> 0x7fffc9fcbf56 <+182>: movb (%rsi,%r8), %cl
0x7fffc9fcbf5a <+186>: movb %cl, (%rdi,%r8)
0x7fffc9fcbf5e <+190>: subq $0x1, %rdx
0x7fffc9fcbf62 <+194>: je 0x7fffc9fcbf78 ; <+216>
Target 0: (haproxy) stopped.
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason =
EXC_BAD_ACCESS (code=1, address=0x18)
* frame #0: 0x00007fffc9fcbf56
libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 182
frame #1: 0x00007fffc9e7442e libsystem_c.dylib`__memcpy_chk + 22
frame #2: 0x000000010002ec46
haproxy`hlua_lua2arg_check(L=0x000000010120d298, first=3,
argp=0x00007fff5fbfe690, mask=196, p=0x0000000101817000) at hlua.c:749
frame #3: 0x000000010001fa00
haproxy`hlua_run_sample_conv(L=0x000000010120d298) at hlua.c:3393
frame #4: 0x000000010032400b haproxy`luaD_precall + 747
frame #5: 0x00000001003343c6 haproxy`luaV_execute + 3158
frame #6: 0x0000000100323429 haproxy`luaD_rawrunprotected + 89
frame #7: 0x0000000100324516 haproxy`lua_resume + 278
frame #8: 0x000000010001b199
haproxy`hlua_ctx_resume(lua=0x0000000101205080, yield_allowed=1) at
hlua.c:1080
frame #9: 0x0000000100027de8
haproxy`hlua_action(rule=0x000000010101b180, px=0x0000000101817000,
sess=0x000000010120cb70, s=0x000000010120cc00, flags=2) at hlua.c:6198
frame #10: 0x0000000100044bcd
haproxy`http_req_get_intercept_rule(px=0x0000000101817000,
rules=0x0000000101817048, s=0x000000010120cc00,
deny_status=0x00007fff5fbfee78) at proto_http.c:2760
frame #11: 0x0000000100046182
haproxy`http_process_req_common(s=0x000000010120cc00,
req=0x000000010120cc10, an_bit=16, px=0x0000000101817000) at
proto_http.c:3461
frame #12: 0x0000000100094c50
haproxy`process_stream(t=0x000000010120cf40, context=0x000000010120cc00,
state=9) at stream.c:1905
frame #13: 0x000000010016179f haproxy`process_runnable_tasks at
task.c:362
frame #14: 0x00000001000ea0eb haproxy`run_poll_loop at
haproxy.c:2403
frame #15: 0x00000001000e7c74
haproxy`run_thread_poll_loop(data=0x00007fff5fbff3a4) at haproxy.c:2464
frame #16: 0x00000001000e4a49 haproxy`main(argc=3,
argv=0x00007fff5fbff590) at haproxy.c:3082
frame #17: 0x00007fffc9db9235 libdyld.dylib`start + 1
Issue goes away if you change the lua txn.sc:ipmask() line to:
txn.sc:ipmask(txn.f:src(), '24', '112')
Reproduced with current master (9db0fed) and lua version 5.3.4.
-Patrick
