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 e406fb13e5b08b440100ec6215973060b7fdcff3 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 12:11:44 +0100
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Subject: [PATCH] mount.cifs: update the cap bounding set only when CAP_SETPCAP
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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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mount.cifs.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/mount.cifs.c b/mount.cifs.c
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index 81bdbc8..2474e98 100644
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--- a/mount.cifs.c
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+++ b/mount.cifs.c
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@@ -347,6 +347,8 @@ static int set_password(struct parsed_mount_info *parsed_info, const char *src)
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static int
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drop_capabilities(int parent)
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{
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+ capng_select_t set = CAPNG_SELECT_CAPS;
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+
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capng_setpid(getpid());
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capng_clear(CAPNG_SELECT_BOTH);
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if (parent) {
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@@ -364,7 +366,10 @@ drop_capabilities(int parent)
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return EX_SYSERR;
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}
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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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fprintf(stderr, "Unable to apply new capability set.\n");
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return EX_SYSERR;
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}
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--
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2.27.0
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