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From 4f9e2b4b36fda208d25acf4126abbf4fee37f0b5 Mon Sep 17 00:00:00 2001
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Message-Id: <4f9e2b4b36fda208d25acf4126abbf4fee37f0b5@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Tue, 25 Feb 2020 11:24:52 +0100
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Subject: [PATCH] security: Don't fail if locking a file on NFS mount fails
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The way that our file locking works is that we open() the file we
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want to lock and then use fcntl(fd, F_SETLKW, ...) to lock it.
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The problem is, we are doing all of these as root which doesn't
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work if the file lives on root squashed NFS, because if it does
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then the open() fails. The way to resolve this is to make this a
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non fatal error and leave callers deal with this (i.e. disable
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remembering) - implemented in the previous commit.
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https://bugzilla.redhat.com/show_bug.cgi?id=1804672
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Peter Krempa <pkrempa@redhat.com>
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(cherry picked from commit f16663d58f7aab6bf800fcffd34f83f522927897)
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Message-Id: <d3cb3d3214cf3e67bd357fa9781ce55f8dc8c751.1582626185.git.mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/security/security_manager.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/security/security_manager.c b/src/security/security_manager.c
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index 9d06316a99..23ed6a127c 100644
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--- a/src/security/security_manager.c
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+++ b/src/security/security_manager.c
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@@ -1343,6 +1343,11 @@ virSecurityManagerMetadataLock(virSecurityManagerPtr mgr G_GNUC_UNUSED,
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continue;
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}
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+ if (virFileIsSharedFS(p)) {
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+ /* Probably a root squashed NFS. */
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+ continue;
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+ }
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+
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virReportSystemError(errno,
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_("unable to open %s"),
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p);
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--
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2.25.1
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