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This queue is for tickets about the LMDB_File CPAN distribution.

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The Basics
Id: 125707
Status: new
Priority: 0/
Queue: LMDB_File

Owner: Nobody in particular
Requestors: ppisar [...]

Bug Information
Severity: (no value)
Broken in: 0.12
Fixed in: (no value)


Subject: Building with -Werror=format-security fails with Perl 5.28.0: LMDB.xs:118:2: error: format not a string literal and no format arguments
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LMDB_File incorrectly uses croak() and that can lead to a crash and produces a warning (or a compilation error) with Perl 5.28.0 now. Attached patch fixes it. By the way, there are plenty of other format string warnings.
Subject: LMDB_File-0.12-Fix-passing-mdb_strerror-value-to-croak.patch
From b9caab7824725758242101b0e9c696c94cb63d10 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <> Date: Fri, 29 Jun 2018 12:35:42 +0200 Subject: [PATCH] Fix passing mdb_strerror() value to croak() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit croak() expects a sprintf-like format string, mdb_strerror() can return any arbitrary string, including formatting sequences. This could trick croak() to access an unitialized memory. Perl 5.28.0 annotates croak() and building LMDB_File with -Werror=format-security fails now: LMDB.xs: In function 'populateStat': LMDB.xs:118:2: error: format not a string literal and no format arguments [-Werror=format-security] croak(mdb_strerror(res)); ^~~~~ This patch fixes it. Signed-off-by: Petr Písař <> --- LMDB.xs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/LMDB.xs b/LMDB.xs index 01c8504..43f13de 100644 --- a/LMDB.xs +++ b/LMDB.xs @@ -115,7 +115,7 @@ populateStat(pTHX_ HV** hashptr, int res, MDB_stat *stat) { HV* RETVAL; if(res) - croak(mdb_strerror(res)); + croak("%s", mdb_strerror(res)); RETVAL = newHV(); StoreUV("psize", stat->ms_psize); StoreUV("depth", stat->ms_depth); -- 2.14.4

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