Checkpatch did not handle cases where the author From: header
was split into multiple lines. The author identity could not
be resolved and checkpatch generated a false NO_AUTHOR_SIGN_OFF
warning.
A typical example is Commit e33bcbab16d1 ("tee: add support for
session's client UUID generation"). When checkpatch was run on
this commit, it displayed:
"WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal
patch author ''"
This was due to split header lines not being handled properly and
the author himself wrote in Commit cd2614967d8b ("checkpatch: warn
if missing author Signed-off-by"):
"Split From: headers are not fully handled: only the first part
is compared."
Support split From: headers by correctly parsing the header
extension lines. RFC 2822, Section-2.2.3 stated that each extended
line must start with a WSP character (a space or htab). The solution
was therefore to concatenate the lines which start with a WSP to
get the correct long header.
Suggested-by: Joe Perches <j...@perches.com>
Link:
https://lore.kernel.org/linux-kernel-mentees/f5d8124e54a50480b0a9fa638787bc29b6e09854.ca...@perches.com/
Signed-off-by: Dwaipayan Ray <dwaipayanr...@gmail.com>
---
scripts/checkpatch.pl | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 504d2e431c60..9e65d21456f1 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2661,6 +2661,10 @@ sub process {
# Check the patch for a From:
if (decode("MIME-Header", $line) =~ /^From:\s*(.*)/) {
$author = $1;
+ my $curline = $linenr;
+ while(defined($rawlines[$curline]) &&
($rawlines[$curline++] =~ /^[ \t]\s*(.*)/)) {
+ $author .= $1;
+ }
$author = encode("utf8", $author) if ($line =~
/=\?utf-8\?/i);
$author =~ s/"//g;
$author = reformat_email($author);
--
2.27.0
