56 lines
2.2 KiB
Diff
56 lines
2.2 KiB
Diff
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From 961bc392ee60743344236ddd247ab646a0eec914 Mon Sep 17 00:00:00 2001
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From: Jon Maloy <jmaloy@redhat.com>
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Date: Tue, 9 May 2023 10:29:03 -0400
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Subject: [PATCH 07/21] checkpatch: add qemu_bh_new/aio_bh_new checks
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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RH-MergeRequest: 165: memory: prevent dma-reentracy issues
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RH-Jira: RHEL-516
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [3/13] e0473487f0e3186c42559a5c36a8650f27ab26ae (jmaloy/jmaloy-qemu-kvm-2)
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Jira: https://issues.redhat.com/browse/RHEL-516
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Upstream: Merged
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CVE: CVE-2023-2680
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commit ef56ffbdd6b0605dc1e305611287b948c970e236
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Author: Alexander Bulekov <alxndr@bu.edu>
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Date: Thu Apr 27 17:10:08 2023 -0400
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checkpatch: add qemu_bh_new/aio_bh_new checks
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Advise authors to use the _guarded versions of the APIs, instead.
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Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
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Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
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Message-Id: <20230427211013.2994127-4-alxndr@bu.edu>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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---
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scripts/checkpatch.pl | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
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index d768171dcf..eeaec436eb 100755
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--- a/scripts/checkpatch.pl
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+++ b/scripts/checkpatch.pl
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@@ -2865,6 +2865,14 @@ sub process {
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if ($line =~ /\bsignal\s*\(/ && !($line =~ /SIG_(?:IGN|DFL)/)) {
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ERROR("use sigaction to establish signal handlers; signal is not portable\n" . $herecurr);
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}
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+# recommend qemu_bh_new_guarded instead of qemu_bh_new
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+ if ($realfile =~ /.*\/hw\/.*/ && $line =~ /\bqemu_bh_new\s*\(/) {
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+ ERROR("use qemu_bh_new_guarded() instead of qemu_bh_new() to avoid reentrancy problems\n" . $herecurr);
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+ }
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+# recommend aio_bh_new_guarded instead of aio_bh_new
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+ if ($realfile =~ /.*\/hw\/.*/ && $line =~ /\baio_bh_new\s*\(/) {
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+ ERROR("use aio_bh_new_guarded() instead of aio_bh_new() to avoid reentrancy problems\n" . $herecurr);
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+ }
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# check for module_init(), use category-specific init macros explicitly please
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if ($line =~ /^module_init\s*\(/) {
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ERROR("please use block_init(), type_init() etc. instead of module_init()\n" . $herecurr);
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--
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2.39.3
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