79 lines
2.5 KiB
Diff
79 lines
2.5 KiB
Diff
From bd6a803553a82238a9f618d1bb22f288682f8195 Mon Sep 17 00:00:00 2001
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From: Petr Lautrbach <lautrbach@redhat.com>
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Date: Tue, 9 Jul 2024 21:13:36 +0200
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Subject: [PATCH] libselinux: set free'd data to NULL
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Content-type: text/plain
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Fixes segfault in selabel_open() on systems with SELinux disabled and without any
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SELinux policy installed introduced by commit 5876aca0484f ("libselinux: free
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data on selabel open failure"):
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$ sestatus
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SELinux status: disabled
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$ cat /etc/selinux/config
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cat: /etc/selinux/config: No such file or directory
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$ matchpathcon /abc
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[1] 907999 segmentation fault (core dumped) matchpathcon /abc
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Signed-off-by: Petr Lautrbach <lautrbach@redhat.com>
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---
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libselinux/src/label_backends_android.c | 1 +
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libselinux/src/label_file.c | 1 +
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libselinux/src/label_media.c | 1 +
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libselinux/src/label_x.c | 1 +
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4 files changed, 4 insertions(+)
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diff --git a/libselinux/src/label_backends_android.c b/libselinux/src/label_backends_android.c
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index 49a87686de4c..5bad24f20d73 100644
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--- a/libselinux/src/label_backends_android.c
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+++ b/libselinux/src/label_backends_android.c
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@@ -260,6 +260,7 @@ static void closef(struct selabel_handle *rec)
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free(data->spec_arr);
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free(data);
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+ rec->data = NULL;
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}
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static struct selabel_lookup_rec *property_lookup(struct selabel_handle *rec,
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diff --git a/libselinux/src/label_file.c b/libselinux/src/label_file.c
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index 6c6fe328b353..87dbd0e90f2b 100644
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--- a/libselinux/src/label_file.c
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+++ b/libselinux/src/label_file.c
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@@ -942,6 +942,7 @@ static void closef(struct selabel_handle *rec)
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free(last_area);
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}
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free(data);
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+ rec->data = NULL;
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}
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// Finds all the matches of |key| in the given context. Returns the result in
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diff --git a/libselinux/src/label_media.c b/libselinux/src/label_media.c
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index 852aeada8ff4..bae065c12a55 100644
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--- a/libselinux/src/label_media.c
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+++ b/libselinux/src/label_media.c
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@@ -183,6 +183,7 @@ static void close(struct selabel_handle *rec)
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free(spec_arr);
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free(data);
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+ rec->data = NULL;
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}
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static struct selabel_lookup_rec *lookup(struct selabel_handle *rec,
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diff --git a/libselinux/src/label_x.c b/libselinux/src/label_x.c
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index a8decc7a0093..ddae4f6c22b6 100644
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--- a/libselinux/src/label_x.c
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+++ b/libselinux/src/label_x.c
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@@ -210,6 +210,7 @@ static void close(struct selabel_handle *rec)
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free(spec_arr);
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free(data);
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+ rec->data = NULL;
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}
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static struct selabel_lookup_rec *lookup(struct selabel_handle *rec,
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--
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2.45.2
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