b9a4d50032
Fix issue: https://gitee.com/src-openeuler/cifs-utils/issues/I6RRNJ Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com> (cherry picked from commit 9305c08964d0f21e12f29fed187e53e5231770a2)
51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
From 4205fdc411701ffc323769d41508e0875b9d63d4 Mon Sep 17 00:00:00 2001
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From: Jonas Witschel <diabonas@archlinux.org>
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Date: Sat, 21 Nov 2020 12:11:45 +0100
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Subject: [PATCH] cifs.upcall: update the cap bounding set only when
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CAP_SETPCAP is given
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libcap-ng 0.8.1 tightened the error checking on capng_apply, returning an error
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of -4 when trying to update the capability bounding set without having the
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CAP_SETPCAP capability to be able to do so. Previous versions of libcap-ng
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silently skipped updating the bounding set and only updated the normal
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CAPNG_SELECT_CAPS capabilities instead.
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Check beforehand whether we have CAP_SETPCAP, in which case we can use
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CAPNG_SELECT_BOTH to update both the normal capabilities and the bounding set.
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Otherwise, we can at least update the normal capabilities, but refrain from
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trying to update the bounding set to avoid getting an error.
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Signed-off-by: Jonas Witschel <diabonas@archlinux.org>
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---
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cifs.upcall.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/cifs.upcall.c b/cifs.upcall.c
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index 1559434..af1a0b0 100644
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--- a/cifs.upcall.c
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+++ b/cifs.upcall.c
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@@ -88,6 +88,8 @@ typedef enum _sectype {
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static int
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trim_capabilities(bool need_environ)
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{
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+ capng_select_t set = CAPNG_SELECT_CAPS;
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+
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capng_clear(CAPNG_SELECT_BOTH);
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/* SETUID and SETGID to change uid, gid, and grouplist */
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@@ -105,7 +107,10 @@ trim_capabilities(bool need_environ)
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return 1;
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}
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- if (capng_apply(CAPNG_SELECT_BOTH)) {
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+ if (capng_have_capability(CAPNG_EFFECTIVE, CAP_SETPCAP)) {
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+ set = CAPNG_SELECT_BOTH;
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+ }
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+ if (capng_apply(set)) {
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syslog(LOG_ERR, "%s: Unable to apply capability set: %m\n", __func__);
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return 1;
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}
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--
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2.27.0
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