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Updated ndk_md5_hash() to work with updated NDK #3

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Updated ndk_md5_hash() to work with updated NDK #3

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@chaoslawful
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merge done. thanks!

@bakins bakins mentioned this pull request Jul 3, 2012
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@0x5446 0x5446 mentioned this pull request Dec 17, 2012
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@rfwatson rfwatson mentioned this pull request May 8, 2013
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@fancy-rabbit fancy-rabbit mentioned this pull request Jan 31, 2019
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@ecc256 ecc256 mentioned this pull request Feb 4, 2019
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thibaultcha added a commit to thibaultcha/lua-nginx-module that referenced this pull request Feb 15, 2019
@thibaultcha
bugfix: fixed a race condition in the new conn queuing mechanism.
71ed993 
This issue appeared in our EC2 test cluster, which compiles Nginx with
`-DNGX_LUA_USE_ASSERT` and `-DNGX_LUA_ABORT_AT_PANIC`.

The lua-resty-redis test:

    === TEST 1: github issue openresty#108: ngx.locaiton.capture + redis.set_keepalive

in t/bugs.t [1] would produce core dumps in the check leak testing mode.

The backtrace for these core dumps was:

    #0  0x00007fd417bee277 in raise () from /lib64/libc.so.6
    openresty#1  0x00007fd417bef968 in abort () from /lib64/libc.so.6
    openresty#2  0x00007fd417be7096 in __assert_fail_base () from /lib64/libc.so.6
    openresty#3  0x00007fd417be7142 in __assert_fail () from /lib64/libc.so.6
    openresty#4  0x000000000050d227 in ngx_http_lua_socket_tcp_resume_conn_op (spool=c/ngx_http_lua_socket_tcp.c:3963
    openresty#5  0x000000000050e51a in ngx_http_lua_socket_tcp_finalize (r=r@entry=0x5628) at ../../src/ngx_http_lua_socket_tcp.c:4195
    openresty#6  0x000000000050e570 in ngx_http_lua_socket_tcp_cleanup (data=0x7fd419p_lua_socket_tcp.c:3755
    openresty#7  0x0000000000463aa5 in ngx_http_free_request (r=r@entry=0xbfaec0, rc=http_request.c:3508
    ...

Which was caused by the following assertion in ngx_http_lua_socket_tcp.c
with `NGX_DEBUG`:

    #if (NGX_DEBUG)
        ngx_http_lua_assert(spool->connections >= 0);

    #else

Thanks to Mozilla's rr, a recorded session showed that
`spool->connections` was `-1`.

Unfortunately, reproducing this case does not seem possible, since the
failure is due to the request cleanup (`ngx_http_free_request`). Here is
an explanation:

    -- thread 1
    local sock = ngx.socket.tcp()
    sock:connect()
    sock:setkeepalive() -- pool created, connections: 1

        -- thread 2
        local sock = ngx.socket.tcp()
        sock:connect() -- from pool, connections: 1

    -- thread 1
    -- sock from thread 1 idle timeout, closes, and calls
    -- ngx_http_lua_socket_tcp_finalize, connections: 0

        -- thread 2
        sock:setkeepalive() -- connections: -1
        -- ngx_http_lua_socket_tcp_resume_conn_op gets called, assertion fails

In order to avoid this race condition, we must determine whether the
socket pool exists or not, not from the
`ngx_http_lua_socket_tcp_upstream` struct, but from the Lua Registry.
This way, when thread 2's socket enters the keepalive state, it will
respect the previous call to `ngx_http_lua_socket_free_pool` (which
unset the pool from the registry).

[1]: https://github.com/openresty/lua-resty-redis/blob/master/t/bugs.t
thibaultcha added a commit to thibaultcha/lua-nginx-module that referenced this pull request Feb 16, 2019
@thibaultcha
bugfix: fixed a race condition in the new conn queuing mechanism.
92a2633 
This issue appeared in our EC2 test cluster, which compiles Nginx with
`-DNGX_LUA_USE_ASSERT` and `-DNGX_LUA_ABORT_AT_PANIC`.

The lua-resty-redis test:

    === TEST 1: github issue openresty#108: ngx.locaiton.capture + redis.set_keepalive

in t/bugs.t [1] would produce core dumps in the check leak testing mode.

The backtrace for these core dumps was:

    #0  0x00007fd417bee277 in raise () from /lib64/libc.so.6
    openresty#1  0x00007fd417bef968 in abort () from /lib64/libc.so.6
    openresty#2  0x00007fd417be7096 in __assert_fail_base () from /lib64/libc.so.6
    openresty#3  0x00007fd417be7142 in __assert_fail () from /lib64/libc.so.6
    openresty#4  0x000000000050d227 in ngx_http_lua_socket_tcp_resume_conn_op (spool=c/ngx_http_lua_socket_tcp.c:3963
    openresty#5  0x000000000050e51a in ngx_http_lua_socket_tcp_finalize (r=r@entry=0x5628) at ../../src/ngx_http_lua_socket_tcp.c:4195
    openresty#6  0x000000000050e570 in ngx_http_lua_socket_tcp_cleanup (data=0x7fd419p_lua_socket_tcp.c:3755
    openresty#7  0x0000000000463aa5 in ngx_http_free_request (r=r@entry=0xbfaec0, rc=http_request.c:3508
    ...

Which was caused by the following assertion in ngx_http_lua_socket_tcp.c
with `NGX_DEBUG`:

    #if (NGX_DEBUG)
        ngx_http_lua_assert(spool->connections >= 0);

    #else

Thanks to Mozilla's rr, a recorded session showed that
`spool->connections` was `-1`.

Here is a reproducible test case:

    local sock1 = ngx.socket.tcp()
    local sock2 = ngx.socket.tcp()

    sock1:connect()
    sock2:connect()

    sock1:setkeepalive() -- pool created, connections: 1
    sock2:setkeepalive() -- connections: 1

    sock1:connect() -- connections: 1
    sock2:connect() -- connections: 1

    sock1:close() -- connections: 0
    sock2:close() -- connections: -1
    -- ngx_http_lua_socket_tcp_resume_conn_op gets called, assertion fails

In order to avoid this race condition, we must determine whether the
socket pool exists or not, not from the
`ngx_http_lua_socket_tcp_upstream` struct, but from the Lua Registry.
This way, when thread 2's socket enters the keepalive state, it will
respect the previous call to `ngx_http_lua_socket_free_pool` (which
unset the pool from the registry).

[1]: https://github.com/openresty/lua-resty-redis/blob/master/t/bugs.t
zhuizhuhaomeng pushed a commit that referenced this pull request Oct 19, 2021
@zhuizhuhaomeng
bugfix: fixed memcpy param overlap detected by asan.
3f1c683 
==openresty==70603==ERROR: AddressSanitizer: memcpy-param-overlap: memory ranges [0x621000001500,0x621000002181) and [0x62100000187f, 0x621000002500) overlap
    #0 0x7f3db1899ffe  (/lib64/libasan.so.5+0x99ffe)
    #1 0x9da926  (/usr/local/openresty-debug/nginx/sbin/nginx+0x9da926)
    #2 0x9dd1a1  (/usr/local/openresty-debug/nginx/sbin/nginx+0x9dd1a1)
    #3 0x4c89c6  (/usr/local/openresty-debug/nginx/sbin/nginx+0x4c89c6)
    #4 0x5d1e4e  (/usr/local/openresty-debug/nginx/sbin/nginx+0x5d1e4e)
    #5 0x4c89c6  (/usr/local/openresty-debug/nginx/sbin/nginx+0x4c89c6)
    #6 0x5b8583  (/usr/local/openresty-debug/nginx/sbin/nginx+0x5b8583)
    #7 0x4c89c6  (/usr/local/openresty-debug/nginx/sbin/nginx+0x4c89c6)
    #8 0x4b4419  (/usr/local/openresty-debug/nginx/sbin/nginx+0x4b4419)
    #9 0x427f16  (/usr/local/openresty-debug/nginx/sbin/nginx+0x427f16)
    #10 0x7f3daff27554  (/lib64/libc.so.6+0x22554)
    #11 0x42d537  (/usr/local/openresty-debug/nginx/sbin/nginx+0x42d537)
@holycd holycd mentioned this pull request Feb 24, 2023
Open
xiaocang added a commit to xiaocang/lua-nginx-module that referenced this pull request Jul 11, 2024
@xiaocang
bugfix: append new parameters to ngx_http_lua_ffi_balancer_set_curren…
848ea38 
…t_peer at function end.

Avoid inserting new parameters in the middle of the function to prevent core
dumps when using old lua-resty-core with new lua-nginx-module.

Example stack trace:

```
Message: Process 1414245 (nginx) of user 1000 dumped core.

        Stack trace of thread 1414245:
        #0  0x00007ff596938285 __strlen_avx2 (libc.so.6 + 0x162285)
        openresty#1  0x00007ff596f623d2 lj_cf_ffi_string (libluajit-5.1.so.2 + 0x523d2)
        openresty#2  0x00007ff596f1bb4b lj_BC_FUNCC (libluajit-5.1.so.2 + 0xbb4b)
        openresty#3  0x00007ff596f74223 lua_pcall (libluajit-5.1.so.2 + 0x64223)
        openresty#4  0x00000000005044b7 n/a (/home/jiahao/work/org/lua-resty-core/work/nginx/sbin/nginx + 0x1044b7)
```
xiaocang added a commit to xiaocang/lua-nginx-module that referenced this pull request Jul 11, 2024
@xiaocang
bugfix: append new parameters to ngx_http_lua_ffi_balancer_set_curren…
1b27e3a 
…t_peer at function end.

Avoid inserting new parameters in the middle of the function to prevent core
dumps when using old lua-resty-core with new lua-nginx-module.

Example stack trace:

```
Message: Process 1414245 (nginx) of user 1000 dumped core.

        Stack trace of thread 1414245:
        #0  0x00007ff596938285 __strlen_avx2 (libc.so.6 + 0x162285)
        openresty#1  0x00007ff596f623d2 lj_cf_ffi_string (libluajit-5.1.so.2 + 0x523d2)
        openresty#2  0x00007ff596f1bb4b lj_BC_FUNCC (libluajit-5.1.so.2 + 0xbb4b)
        openresty#3  0x00007ff596f74223 lua_pcall (libluajit-5.1.so.2 + 0x64223)
        openresty#4  0x00000000005044b7 n/a (/home/jiahao/work/org/lua-resty-core/work/nginx/sbin/nginx + 0x1044b7)
```
zhuizhuhaomeng pushed a commit to xiaocang/lua-nginx-module that referenced this pull request Jul 12, 2024
@xiaocang @zhuizhuhaomeng
bugfix: append new parameters to ngx_http_lua_ffi_balancer_set_curren…
0f5c4da 
…t_peer at function end.

Avoid inserting new parameters in the middle of the function to prevent core
dumps when using old lua-resty-core with new lua-nginx-module.

Example stack trace:

```
Message: Process 1414245 (nginx) of user 1000 dumped core.

        Stack trace of thread 1414245:
        #0  0x00007ff596938285 __strlen_avx2 (libc.so.6 + 0x162285)
        openresty#1  0x00007ff596f623d2 lj_cf_ffi_string (libluajit-5.1.so.2 + 0x523d2)
        openresty#2  0x00007ff596f1bb4b lj_BC_FUNCC (libluajit-5.1.so.2 + 0xbb4b)
        openresty#3  0x00007ff596f74223 lua_pcall (libluajit-5.1.so.2 + 0x64223)
        openresty#4  0x00000000005044b7 n/a (/home/jiahao/work/org/lua-resty-core/work/nginx/sbin/nginx + 0x1044b7)
```
xiaocang added a commit to xiaocang/lua-nginx-module that referenced this pull request Jul 15, 2024
@xiaocang
bugfix: append new parameters to ngx_http_lua_ffi_balancer_set_curren…
d6c5280 
…t_peer at function end.

Avoid inserting new parameters in the middle of the function to prevent core
dumps when using old lua-resty-core with new lua-nginx-module.

Example stack trace:

```
Message: Process 1414245 (nginx) of user 1000 dumped core.

        Stack trace of thread 1414245:
        #0  0x00007ff596938285 __strlen_avx2 (libc.so.6 + 0x162285)
        openresty#1  0x00007ff596f623d2 lj_cf_ffi_string (libluajit-5.1.so.2 + 0x523d2)
        openresty#2  0x00007ff596f1bb4b lj_BC_FUNCC (libluajit-5.1.so.2 + 0xbb4b)
        openresty#3  0x00007ff596f74223 lua_pcall (libluajit-5.1.so.2 + 0x64223)
        openresty#4  0x00000000005044b7 n/a (/home/jiahao/work/org/lua-resty-core/work/nginx/sbin/nginx + 0x1044b7)
```
This pull request was closed.
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2 participants
@simpl-it @chaoslawful