forked from pool/mcelog
28 lines
969 B
Diff
28 lines
969 B
Diff
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Index: mcelog-1.0.8/mcelog.c
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===================================================================
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--- mcelog-1.0.8.orig/mcelog.c 2015-01-22 14:56:56.151710136 +0100
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+++ mcelog-1.0.8/mcelog.c 2015-01-23 09:58:35.252799171 +0100
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@@ -37,6 +37,7 @@
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#include <assert.h>
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#include <signal.h>
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#include <pwd.h>
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+#include <grp.h>
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#include <sys/wait.h>
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#include <fnmatch.h>
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#include "mcelog.h"
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@@ -1185,6 +1186,14 @@
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static void drop_cred(void)
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{
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+ /* When dropping privileges from root, the `setgroups` call will
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+ * remove any extraneous groups. If we don't call this, then
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+ * even though our uid has dropped, we may still have groups
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+ * that enable us to do super-user things. This will fail if we
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+ * aren't root, so don't bother checking the return value, this
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+ * is just done as an optimistic privilege dropping function.
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+ */
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+ setgroups(0, NULL);
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if (runcred.uid != -1U && runcred.gid == -1U) {
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struct passwd *pw = getpwuid(runcred.uid);
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if (pw)
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