From 33e8e95cbd0d6724553f390142d4b11352d59dd0 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 30 Dec 2021 21:25:24 +0100 Subject: [PATCH] hurd: Make getrandom a stub inside the random translator glibc uses /dev/urandom for getrandom(), and from version 2.34 malloc initialization uses it. We have to detect when we are running the random translator itself, in which case we can't read ourself. --- sysdeps/mach/hurd/getrandom.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/sysdeps/mach/hurd/getrandom.c b/sysdeps/mach/hurd/getrandom.c index 645f293..24f9ac6 100644 --- a/sysdeps/mach/hurd/getrandom.c +++ b/sysdeps/mach/hurd/getrandom.c @@ -21,6 +21,8 @@ #include #include +extern char *trivfs_server_name __attribute__((weak)); + /* Write up to LENGTH bytes of randomness starting at BUFFER. Return the number of bytes written, or -1 on error. */ ssize_t @@ -31,6 +33,17 @@ __getrandom (void *buffer, size_t length, unsigned int flags) size_t amount_read; int fd; + if (&trivfs_server_name && trivfs_server_name + && trivfs_server_name[0] == 'r' + && trivfs_server_name[1] == 'a' + && trivfs_server_name[2] == 'n' + && trivfs_server_name[3] == 'd' + && trivfs_server_name[4] == 'o' + && trivfs_server_name[5] == 'm' + && trivfs_server_name[6] == '\0') + /* We are random, don't try to read ourselves! */ + return length; + if (flags & GRND_RANDOM) random_source = "/dev/random"; -- 2.7.4