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ktest.pl: Fix uninitialized var in config-bisect.pl

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commit d3042cbe84 upstream.

The error path of copying the old config used the wrong variable in the
error message:

 $ mkdir /tmp/build
 $ ./tools/testing/ktest/config-bisect.pl -b /tmp/build config-good /tmp/config-bad
 $ chmod 0 /tmp/build
 $ ./tools/testing/ktest/config-bisect.pl -b /tmp/build config-good /tmp/config-bad good
 cp /tmp/build//.config config-good.tmp ... [0 seconds] FAILED!
 Use of uninitialized value $config in concatenation (.) or string at ./tools/testing/ktest/config-bisect.pl line 744.
 failed to copy  to config-good.tmp

When it should have shown:

 failed to copy /tmp/build//.config to config-good.tmp

Cc: stable@vger.kernel.org
Cc: John 'Warthog9' Hawley <warthog9@kernel.org>
Fixes: 0f0db06599 ("ktest: Add standalone config-bisect.pl program")
Link: https://patch.msgid.link/20251203180924.6862bd26@gandalf.local.home
Reported-by: "John W. Krahn" <jwkrahn@shaw.ca>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steven Rostedt
2026-01-02 12:57:09 +01:00
committed by Greg Kroah-Hartman
parent b3b036bac7
commit 2b78da4cc7
1 changed files with 2 additions and 2 deletions
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tools/testing/ktest/config-bisect.pl
+2 -2
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@@ -741,9 +741,9 @@ if ($start) {
die "Can not find file $bad\n";
}
if ($val eq "good") {
run_command "cp $output_config $good" or die "failed to copy $config to $good\n";
run_command "cp $output_config $good" or die "failed to copy $output_config to $good\n";
} elsif ($val eq "bad") {
run_command "cp $output_config $bad" or die "failed to copy $config to $bad\n";
run_command "cp $output_config $bad" or die "failed to copy $output_config to $bad\n";
}
}