46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
From ee20d385ef319f8523f1debc49f375c8eff257a6 Mon Sep 17 00:00:00 2001
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From: "Andrew G. Morgan" <morgan@kernel.org>
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Date: Fri, 22 Dec 2023 06:37:02 -0800
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Subject: Stop using _pam_overwrite() in pam_cap.c.
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It looks like the Linux-PAM folk have deprecated this macro. Compiler optimization
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is hard to account for: apparently this explicit deletion is no longer
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guaranteed to work. This function was marked deprecated in v1.5.3 of Linux-PAM.
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I've replaced its use with memset(). I'm not convinced that that will be honored
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either, but remain hopeful and prefer to leave the code explicit in its intent
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without a deprecation warning messing up the build log. Should some compiler
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optimize it away and it leads to an exploit of some sort, it can be revealed as
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a compilation bug.
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Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
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---
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pam_cap/pam_cap.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/pam_cap/pam_cap.c b/pam_cap/pam_cap.c
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index b9419cb..3fe3b8c 100644
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--- a/pam_cap/pam_cap.c
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+++ b/pam_cap/pam_cap.c
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@@ -199,7 +199,7 @@ defer:
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int i;
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for (i = 0; i < groups_n; i++) {
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char *g = groups[i];
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- _pam_overwrite(g);
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+ memset(g, 0, strlen(g));
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_pam_drop(g);
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}
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if (groups != NULL) {
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@@ -440,7 +440,7 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
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small race associated with a redundant read of the
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config. */
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- _pam_overwrite(conf_caps);
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+ memset(conf_caps, 0, strlen(conf_caps));
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_pam_drop(conf_caps);
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return PAM_SUCCESS;
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--
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cgit 1.2.3-korg
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