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From 78713fc280ae0cb18e389ff9ba1eee97eedb7050 Mon Sep 17 00:00:00 2001
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Message-Id: <78713fc280ae0cb18e389ff9ba1eee97eedb7050@dist-git>
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From: John Ferlan <jferlan@redhat.com>
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Date: Wed, 9 Oct 2019 14:27:46 +0200
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Subject: [PATCH] util: Avoid possible error in virCommandMassClose
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Avoid the chance that sysconf(_SC_OPEN_MAX) returns -1 and thus
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would cause virBitmapNew would attempt to allocate a very large
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bitmap.
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Found by Coverity
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Signed-off-by: John Ferlan <jferlan@redhat.com>
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ACKed-by: Peter Krempa <pkrempa@redhat.com>
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(cherry picked from commit 6ae4f4a4ceb123417b732e869d53099983ae8d3f)
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https://bugzilla.redhat.com/show_bug.cgi?id=1759904
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Message-Id: <69ca4c7bcf0e3c7588fad50d68dbf75180109b31.1570623892.git.mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/util/vircommand.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/util/vircommand.c b/src/util/vircommand.c
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index 17405ceea4..083a8bbee5 100644
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--- a/src/util/vircommand.c
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+++ b/src/util/vircommand.c
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@@ -561,6 +561,11 @@ virCommandMassClose(virCommandPtr cmd,
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* Therefore we can safely allocate memory here (and transitively call
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* opendir/readdir) without a deadlock. */
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+ if (openmax < 0) {
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+ virReportSystemError(errno, "%s", _("sysconf(_SC_OPEN_MAX) failed"));
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+ return -1;
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+ }
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+
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if (!(fds = virBitmapNew(openmax)))
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return -1;
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--
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2.23.0
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