From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A45F121D3CC for ; Wed, 14 Jan 2026 13:45:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768398358; cv=none; b=JKz1H0kt9LWN03qcr5OeNYurKLQWhUraUEcLkDy6UYEo/QRSVlU8QcEnnPzoEYvzC74NGA2mGQuWXtIKtRtNJTSR4QrQLhBvlKWi4AkMUG6YEq/1TrwruQnOticUByGviutqCRDEQUtGwX+S1g9koh41sLIYKnXR+Di3J1mHGJk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768398358; c=relaxed/simple; bh=BCCyCsRW7Vf4Sl/bkOLHieBKq/+dCXkKunHW/qohU9U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=kJNk3G4GWzo6sDUOmghZcOuelB7ZEjsu2RssOcbZBdFATgAFRkb6wCeOAvQpQSaI7xqaXb/Q0D5vPPhDXjgHpFxVIy5JZ6iZgHUEzQerqgWpTzt9oiEP5og73tQDQQYCkajygUJEwhU+Cyxq6/2zWMuiYRka8fTWpKnG0nSakW4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=NOt/whE+; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=GU964T5Z; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=NOt/whE+; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=GU964T5Z; arc=none smtp.client-ip=195.135.223.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="NOt/whE+"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="GU964T5Z"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="NOt/whE+"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="GU964T5Z" Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id E2C70341B9; Wed, 14 Jan 2026 13:45:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1768398354; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=JJ6Q4N2jna6xKyDfI7nc6YI9P3b3/bf/GJViF/rkRKg=; b=NOt/whE+fXHThT3QliCBkWOSLPe66ZYW3vuhEGi8cYzYbhATt9lONSJrPGS73rEWPcwKfB tFhNrj1aARtRE/YlH8MbgBpaHIRppC5DuATv0bOFTbbbuGbAnQ1Kws2uDoYGdQtNAxBen0 auDkajgqx2qFqJQtqdNZCbPZ+U/zR84= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1768398354; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=JJ6Q4N2jna6xKyDfI7nc6YI9P3b3/bf/GJViF/rkRKg=; b=GU964T5ZKy+vNFaI+HyEJWeVEgZhjNn69GFmDrr7WdWayUFcRlQ2qCjhjntr+J6sDnggrz gXbBqLd3JDx+03Bw== Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1768398354; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=JJ6Q4N2jna6xKyDfI7nc6YI9P3b3/bf/GJViF/rkRKg=; b=NOt/whE+fXHThT3QliCBkWOSLPe66ZYW3vuhEGi8cYzYbhATt9lONSJrPGS73rEWPcwKfB tFhNrj1aARtRE/YlH8MbgBpaHIRppC5DuATv0bOFTbbbuGbAnQ1Kws2uDoYGdQtNAxBen0 auDkajgqx2qFqJQtqdNZCbPZ+U/zR84= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1768398354; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=JJ6Q4N2jna6xKyDfI7nc6YI9P3b3/bf/GJViF/rkRKg=; b=GU964T5ZKy+vNFaI+HyEJWeVEgZhjNn69GFmDrr7WdWayUFcRlQ2qCjhjntr+J6sDnggrz gXbBqLd3JDx+03Bw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id BB4453EA63; Wed, 14 Jan 2026 13:45:54 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id PTNFLBKeZ2l2IAAAD6G6ig (envelope-from ); Wed, 14 Jan 2026 13:45:54 +0000 From: David Disseldorp To: linux-fsdevel@vger.kernel.org Cc: Al Viro , Christian Brauner , David Disseldorp Subject: [PATCH] initramfs_test: kunit test for cpio.filesize > PATH_MAX Date: Thu, 15 Jan 2026 00:45:46 +1100 Message-ID: <20260114134546.1691-1-ddiss@suse.de> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo] X-Spam-Flag: NO X-Spam-Score: -2.80 X-Spam-Level: initramfs unpack skips over cpio entries where namesize > PATH_MAX, instead of returning an error. Add coverage for this behaviour. Signed-off-by: David Disseldorp --- init/initramfs_test.c | 47 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/init/initramfs_test.c b/init/initramfs_test.c index 5d2db455e60c5..83f2f14387298 100644 --- a/init/initramfs_test.c +++ b/init/initramfs_test.c @@ -447,6 +447,52 @@ static void __init initramfs_test_fname_pad(struct kunit *test) kfree(tbufs); } +static void __init initramfs_test_fname_path_max(struct kunit *test) +{ + char *err; + size_t len; + struct kstat st0, st1; + char fdata[] = "this file data will not be unpacked"; + struct test_fname_path_max { + char fname_oversize[PATH_MAX + 1]; + char fname_ok[PATH_MAX]; + char cpio_src[(CPIO_HDRLEN + PATH_MAX + 3 + sizeof(fdata)) * 2]; + } *tbufs = kzalloc(sizeof(struct test_fname_path_max), GFP_KERNEL); + struct initramfs_test_cpio c[] = { { + .magic = "070701", + .ino = 1, + .mode = S_IFDIR | 0777, + .nlink = 1, + .namesize = sizeof(tbufs->fname_oversize), + .fname = tbufs->fname_oversize, + .filesize = sizeof(fdata), + .data = fdata, + }, { + .magic = "070701", + .ino = 2, + .mode = S_IFDIR | 0777, + .nlink = 1, + .namesize = sizeof(tbufs->fname_ok), + .fname = tbufs->fname_ok, + } }; + + memset(tbufs->fname_oversize, '/', sizeof(tbufs->fname_oversize) - 1); + memset(tbufs->fname_ok, '/', sizeof(tbufs->fname_ok) - 1); + memcpy(tbufs->fname_oversize, "fname_oversize", + sizeof("fname_oversize") - 1); + memcpy(tbufs->fname_ok, "fname_ok", sizeof("fname_ok") - 1); + len = fill_cpio(c, ARRAY_SIZE(c), tbufs->cpio_src); + + /* unpack skips over fname_oversize instead of returning an error */ + err = unpack_to_rootfs(tbufs->cpio_src, len); + KUNIT_EXPECT_NULL(test, err); + + KUNIT_EXPECT_EQ(test, init_stat("fname_oversize", &st0, 0), -ENOENT); + KUNIT_EXPECT_EQ(test, init_stat("fname_ok", &st1, 0), 0); + + kfree(tbufs); +} + /* * The kunit_case/_suite struct cannot be marked as __initdata as this will be * used in debugfs to retrieve results after test has run. @@ -459,6 +505,7 @@ static struct kunit_case __refdata initramfs_test_cases[] = { KUNIT_CASE(initramfs_test_hardlink), KUNIT_CASE(initramfs_test_many), KUNIT_CASE(initramfs_test_fname_pad), + KUNIT_CASE(initramfs_test_fname_path_max), {}, }; -- 2.51.0