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src: ConnectEx

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This commit is contained in:
reito 2025-02-04 17:18:24 +08:00
parent 177b9d86fa
commit 3171c0331b
1 changed files with 11 additions and 1 deletions
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12
src/win/pipe.c
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@ -1102,6 +1102,16 @@ int uv_pipe_connect2(uv_connect_t* req,
struct sockaddr_un uds_addr_bind = {0};
struct sockaddr_un uds_addr_real = {0};
DWORD uds_dummy_send_cnt = 0;
/* ConnectEx seems has a bug when using with 'sockaddr_un'.
* It seems corrupting stack if no such buffer present on stack.
* Looks like needs at least 316 bytes to not overwriting some data onto
* valid stack spaces, allocating 512 bytes for 'safety'.
*
* TODO: It still overflow write to this buffer instead of valid
* stack, so it is just a dangerous workaround to write to a controlled
* dummy memory instead of causing stack corruption.
*/
char uds_dummy_send_buffer[512] = {0};
loop = handle->loop;
@ -1239,7 +1249,7 @@ int uv_pipe_connect2(uv_connect_t* req,
/*
* https://learn.microsoft.com/en-us/windows/win32/api/mswsock/nc-mswsock-lpfn_connectex
* Although doc says the send buffer can be ignored, it will smash the
* Although doc says the send buffer can be ignored, it will corrupt the
* stack if we don't actually allocate them on stack and pass them.
*/
ret = uv_wsa_connectex(uds_client_fd,