| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1420663980-20842-5-git-send-email-zohar@linux.vnet.ibm.com>
Date: Wed, 7 Jan 2015 15:52:55 -0500
From: Mimi Zohar <zohar@...ux.vnet.ibm.com>
To: initramfs <initramfs@...r.kernel.org>
Cc: Mimi Zohar <zohar@...ux.vnet.ibm.com>,
Al Viro <viro@...IV.linux.org.uk>,
linux-ima-devel@...ts.sourceforge.net,
linux-security-module <linux-security-module@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: [RFC][PATCH 4/9] gen_init_cpio: define new CPIO format to support xattrs
This patch defines a new CPIO method 070703 for including xattrs.
The new format extends the existing NEWC header to include the
buffer size containing the number of xattrs, the xattr(s) name,
data size, and data.
Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>
---
usr/gen_init_cpio.c | 35 ++++++++++++++++++++++-------------
1 file changed, 22 insertions(+), 13 deletions(-)
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index ee35361..0d9c6e8 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -21,7 +21,11 @@
#define str(s) xstr(s)
static char *newcfmt = "%s%08X%08X%08lX%08lX%08X%08lX"
- "%08X%08X%08X%08X%08X%08X%08X";
+ "%08X%08X%08X%08X%08X%08X%15$08X";
+static char *newcxfmt = "%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X%08X";
+
+static int newcx;
static unsigned int offset;
static unsigned int ino = 721;
@@ -58,7 +62,7 @@ static void push_rest(const char *name)
putchar(0);
offset += name_len;
- tmp_ofs = name_len + 110;
+ tmp_ofs = name_len + (newcx ? 118 : 110);
while (tmp_ofs & 3) {
putchar(0);
offset++;
@@ -69,7 +73,7 @@ static void push_rest(const char *name)
static void push_hdr(const char *s)
{
fputs(s, stdout);
- offset += 110;
+ offset += newcx ? 118 : 110;
}
static void cpio_trailer(void)
@@ -77,8 +81,8 @@ static void cpio_trailer(void)
char s[256];
const char name[] = "TRAILER!!!";
- sprintf(s, newcfmt,
- "070701", /* magic */
+ sprintf(s, newcx ? newcxfmt : newcfmt,
+ newcx ? "070703": "070701",/* magic */
0, /* ino */
0, /* mode */
(long) 0, /* uid */
@@ -91,6 +95,7 @@ static void cpio_trailer(void)
0, /* rmajor */
0, /* rminor */
(unsigned)strlen(name)+1, /* namesize */
+ 0, /* xattrs-size */
0); /* chksum */
push_hdr(s);
push_rest(name);
@@ -108,8 +113,8 @@ static int cpio_mkslink(const char *name, const char *target,
if (name[0] == '/')
name++;
- sprintf(s, newcfmt,
- "070701", /* magic */
+ sprintf(s, newcx ? newcxfmt : newcfmt,
+ newcx ? "070703": "070701",/* magic */
ino++, /* ino */
S_IFLNK | mode, /* mode */
(long) uid, /* uid */
@@ -122,6 +127,7 @@ static int cpio_mkslink(const char *name, const char *target,
0, /* rmajor */
0, /* rminor */
(unsigned)strlen(name) + 1,/* namesize */
+ 0, /* xattrs-size */
0); /* chksum */
push_hdr(s);
push_string(name);
@@ -156,8 +162,8 @@ static int cpio_mkgeneric(const char *name, unsigned int mode,
if (name[0] == '/')
name++;
- sprintf(s, newcfmt,
- "070701", /* magic */
+ sprintf(s, newcx ? newcxfmt : newcfmt,
+ newcx ? "070703": "070701",/* magic */
ino++, /* ino */
mode, /* mode */
(long) uid, /* uid */
@@ -170,6 +176,7 @@ static int cpio_mkgeneric(const char *name, unsigned int mode,
0, /* rmajor */
0, /* rminor */
(unsigned)strlen(name) + 1,/* namesize */
+ 0, /* xattrs-size */
0); /* chksum */
push_hdr(s);
push_rest(name);
@@ -249,8 +256,8 @@ static int cpio_mknod(const char *name, unsigned int mode,
if (name[0] == '/')
name++;
- sprintf(s, newcfmt,
- "070701", /* magic */
+ sprintf(s, newcx ? newcxfmt : newcfmt,
+ newcx ? "070703": "070701",/* magic */
ino++, /* ino */
mode, /* mode */
(long) uid, /* uid */
@@ -263,6 +270,7 @@ static int cpio_mknod(const char *name, unsigned int mode,
maj, /* rmajor */
min, /* rminor */
(unsigned)strlen(name) + 1,/* namesize */
+ 0, /* xattrs-size */
0); /* chksum */
push_hdr(s);
push_rest(name);
@@ -338,8 +346,8 @@ static int cpio_mkfile(const char *name, const char *location,
if (name[0] == '/')
name++;
namesize = strlen(name) + 1;
- sprintf(s, newcfmt,
- "070701", /* magic */
+ sprintf(s, newcx ? newcxfmt : newcfmt,
+ newcx ? "070703": "070701",/* magic */
ino, /* ino */
mode, /* mode */
(long) uid, /* uid */
@@ -352,6 +360,7 @@ static int cpio_mkfile(const char *name, const char *location,
0, /* rmajor */
0, /* rminor */
namesize, /* namesize */
+ 0, /* xattrs-size */
0); /* chksum */
push_hdr(s);
push_string(name);
--
1.8.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists