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From: Alexey Tourbin <at@altlinux.ru>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] bad paths in rpm packages
Date: Tue, 25 Mar 2008 05:50:03 +0300
Message-ID: <20080325025003.GJ31135@solemn.turbinal> (raw)
In-Reply-To: <20080324232051.GC21713@wo.int.altlinux.org>

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On Tue, Mar 25, 2008 at 02:20:51AM +0300, Dmitry V. Levin wrote:
> > > > $ rpmpeek /ALT/Sisyphus/files/SRPMS/pear-core-1.6.2-alt6.src.rpm fgrep /.  pear-core.spec
> > > > %pear_dir/.*
> > > 
> > > Надо просто добавить проверку в rpm-build.
> > > Аналогичная проверка на то, что все пути начинаются от корня,
> > > там уже есть.  Такие пакеты просто не должны собираться.
> > 
> > Посмотри повнимательнее.
> > Мне кажется это (ещё и) проблема глоба для %files.
> 
> Ещё и.

Собственно, встал вопрос, как определить: какноничен ли путь,
или не каноничен?  Пришлось написать ахтомат (см. ниже).

Но тут всплыла другая проблема: путь может быть каноничен,
но не кошерен.  rpm позволяет запаковать некошерный путь:

%install
install -pD /dev/null %buildroot/etc/rc.d/init.d/functions
ln -s rc.d/init.d %buildroot/etc/init.d
%files
/etc/init.d/functions

$ rpm -bb test.spec 
...
warning: Installed (but unpackaged) file(s) found:
    /etc/init.d
    /etc/rc.d/init.d/functions
Wrote: /home/at/RPM/RPMS/athlon/test-1.0-alt1.athlon.rpm
$ rpm -qlvp /home/at/RPM/RPMS/athlon/test-1.0-alt1.athlon.rpm
-rwxr-xr-x    1 root    root                0 Mar 20 18:50 /etc/init.d/functions
$

Куда ни кинь, всюду клин.
А ты говоришь "загадка".


commit 44a9bc68edcc01c08a2483dd90b2159fe9b35e36
Author: Alexey Tourbin <at@altlinux>
Date:   Tue Mar 25 05:33:59 2008 +0300

    file.c (addFile): file path must be canonical (new function pathIsCanonical)

diff --git a/build/files.c b/build/files.c
index 114d575..35d34be 100644
--- a/build/files.c
+++ b/build/files.c
@@ -1487,6 +1487,66 @@ static /*@null@*/ FileListRec freeFileList(/*@only@*/ FileListRec fileList,
     return NULL;
 }
 
+/* Written by Alexey Tourbin! */
+static int pathIsCanonical(const char *path)
+{
+    enum {
+	ST_NONE,
+	ST_SLASH,
+	ST_SLASHDOT,
+	ST_SLASHDOTDOT
+    } state = ST_NONE;
+    const char *p = path;
+    while (1) {
+	int c = *p;
+	switch (c) {
+	case '/':
+	    switch (state) {
+	    case ST_SLASH:
+	    case ST_SLASHDOT:
+	    case ST_SLASHDOTDOT:
+		return 0;
+	    default:
+		state = ST_SLASH;
+		break;
+	    }
+	    break;
+	case '.':
+	    switch (state) {
+	    case ST_SLASH:
+		state = ST_SLASHDOT;
+		break;
+	    case ST_SLASHDOT:
+		state = ST_SLASHDOTDOT;
+		break;
+	    default:
+		state = ST_NONE;
+		break;
+	    }
+	    break;
+	case '\0':
+	    switch (state) {
+	    case ST_SLASHDOT:
+	    case ST_SLASHDOTDOT:
+		return 0;
+	    case ST_SLASH:
+		if (p > path + 1)
+		    return 0;
+		return 1;
+	    default:
+		return 1;
+	    }
+	    break;
+	default:
+	    state = ST_NONE;
+	    break;
+	}
+	p++;
+    }
+    /* not reachable */
+    return 0;
+}
+
 /**
  * Add a file to the package manifest.
  * @param fl		package file tree walk data
@@ -1553,6 +1613,13 @@ static int addFile(FileList fl, const char * diskURL,
 	return RPMERR_BADSPEC;
     }
 
+    if (!pathIsCanonical(fileURL)) {
+	rpmError(RPMERR_BADSPEC,
+	    _("File path must be canonical: %s\n"), fileURL);
+	fl->processingFailed = 1;
+	return RPMERR_BADSPEC;
+    }
+
     /* If we are using a prefix, validate the file */
     if (!fl->inFtw && fl->prefix) {
 	const char *prefixTest;

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  reply	other threads:[~2008-03-25  2:50 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-24 23:07 Alexey Tourbin
2008-03-24 23:13 ` Dmitry V. Levin
2008-03-24 23:17   ` Alexey Tourbin
2008-03-24 23:20     ` Dmitry V. Levin
2008-03-25  2:50       ` Alexey Tourbin [this message]
2008-03-25  3:08         ` Alexey Tourbin
2008-03-25 22:29         ` Alexey Tourbin
2008-03-25  4:04       ` Alexey Tourbin
2008-03-25  0:05   ` Alexey Tourbin
2008-03-24 23:13 ` Alexey Tourbin
2008-03-24 23:42 ` Alexey Tourbin
2008-03-24 23:44   ` Alexey Tourbin

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