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From 901c005299b0316bbca7bc190de56f6c7a2a9880 Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Tue, 3 Mar 2020 18:43:11 +0000
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Subject: [PATCH 15/18] virtiofsd: do_read missing NULL check
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-id: <20200303184314.155564-5-dgilbert@redhat.com>
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Patchwork-id: 94127
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O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH 4/7] virtiofsd: do_read missing NULL check
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Bugzilla: 1797064
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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RH-Acked-by: Ján Tomko <jtomko@redhat.com>
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Missing a NULL check if the argument fetch fails.
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Fixes: Coverity CID 1413119
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 99ce9a7e60fd12b213b985343ff8fcc172de59fd)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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tools/virtiofsd/fuse_lowlevel.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
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index 01c418a..704c036 100644
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--- a/tools/virtiofsd/fuse_lowlevel.c
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+++ b/tools/virtiofsd/fuse_lowlevel.c
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@@ -1116,6 +1116,10 @@ static void do_read(fuse_req_t req, fuse_ino_t nodeid,
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struct fuse_file_info fi;
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arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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memset(&fi, 0, sizeof(fi));
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fi.fh = arg->fh;
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--
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1.8.3.1
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