36 lines
1.0 KiB
Diff
36 lines
1.0 KiB
Diff
From 497e90751bc0d95cc998b0f06305040563903948 Mon Sep 17 00:00:00 2001
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From: Iker Pedrosa <ipedrosa@redhat.com>
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Date: Wed, 10 Nov 2021 12:02:04 +0100
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Subject: [PATCH] newgrp: fix segmentation fault
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Fix segmentation fault in newgrp when xgetspnam() returns a NULL value
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that is immediately freed.
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The error was committed in
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https://github.com/shadow-maint/shadow/commit/e65cc6aebcb4132fa413f00a905216a5b35b3d57
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2019553
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Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
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---
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src/newgrp.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/newgrp.c b/src/newgrp.c
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index 730f47e8..566f1c89 100644
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--- a/src/newgrp.c
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+++ b/src/newgrp.c
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@@ -163,8 +163,8 @@ static void check_perms (const struct group *grp,
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spwd = xgetspnam (pwd->pw_name);
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if (NULL != spwd) {
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pwd->pw_passwd = xstrdup (spwd->sp_pwdp);
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+ spw_free (spwd);
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}
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- spw_free (spwd);
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if ((pwd->pw_passwd[0] == '\0') && (grp->gr_passwd[0] != '\0')) {
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needspasswd = true;
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--
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2.31.1
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