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0888-epmd-Validate-that-the-FD-fits-in-the-set....
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File 0888-epmd-Validate-that-the-FD-fits-in-the-set.patch of Package erlang
From ffb26e566c0cfc963883bb3e846e68d7a7c71cb0 Mon Sep 17 00:00:00 2001 From: Lukas Larsson <lukas@erlang.org> Date: Thu, 16 Apr 2020 17:29:42 +0200 Subject: [PATCH 3/3] epmd: Validate that the FD fits in the set On some OSs (NetBSD) we get larger FDs then we should based on the number of files open to we have to check that the FD actually fits in the fd_set. --- erts/epmd/src/epmd_srv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c index 2f4f189bb4..c37ca197f5 100644 --- a/erts/epmd/src/epmd_srv.c +++ b/erts/epmd/src/epmd_srv.c @@ -1050,6 +1050,12 @@ static int conn_open(EpmdVars *g,int fd) } #endif + if (fd >= FD_SETSIZE) { + dbg_tty_printf(g,0,"fd does not fit in fd_set fd=%d, FD_SETSIZE=%d",fd, FD_SETSIZE); + close(fd); + return EPMD_FALSE; + } + for (i = 0; i < g->max_conn; i++) { if (g->conn[i].open == EPMD_FALSE) { g->active_conn++; -- 2.16.4
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