From: Greg KH <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk,
Tyler Hicks <tyhicks@linux.vnet.ibm.com>,
Colin Ian King <colin.king@canonical.com>,
Tim Gardner <tim.gardner@canonical.com>,
"Adrian C." <anrxc@sysphere.org>
Subject: [ 11/34] eCryptfs: Remove mmap from directory operations
Date: Thu, 01 Mar 2012 13:39:33 -0800 [thread overview]
Message-ID: <20120301213924.051028223@linuxfoundation.org> (raw)
In-Reply-To: <20120301214654.GA13231@kroah.com>
2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
backported from 38e3eaeedcac75360af8a92e7b66956ec4f334e5
Adrian reported that mkfontscale didn't work inside of eCryptfs mounts.
Strace revealed the following:
open("./", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
fcntl64(3, F_GETFD) = 0x1 (flags FD_CLOEXEC)
open("./fonts.scale", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
getdents(3, /* 80 entries */, 32768) = 2304
open("./.", O_RDONLY) = 5
fcntl64(5, F_SETFD, FD_CLOEXEC) = 0
fstat64(5, {st_mode=S_IFDIR|0755, st_size=16384, ...}) = 0
mmap2(NULL, 16384, PROT_READ, MAP_PRIVATE, 5, 0) = 0xb7fcf000
close(5) = 0
--- SIGBUS (Bus error) @ 0 (0) ---
+++ killed by SIGBUS +++
The mmap2() on a directory was successful, resulting in a SIGBUS
signal later. This patch removes mmap() from the list of possible
ecryptfs_dir_fops so that mmap() isn't possible on eCryptfs directory
files.
http://bugs.launchpad.net/bugs/400443
Reported-by: Adrian C. <anrxc@sysphere.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ecryptfs/file.c | 1 -
1 file changed, 1 deletion(-)
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -327,7 +327,6 @@ const struct file_operations ecryptfs_di
#ifdef CONFIG_COMPAT
.compat_ioctl = ecryptfs_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
.open = ecryptfs_open,
.flush = ecryptfs_flush,
.release = ecryptfs_release,
next prev parent reply other threads:[~2012-03-01 21:39 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-01 21:46 [ 00/34] 2.6.32.58-longterm review Greg KH
2012-03-01 21:39 ` [ 01/34] drm/i915: no lvds quirk for AOpen MP45 Greg KH
2012-03-01 21:39 ` [ 02/34] hwmon: (f75375s) Fix bit shifting in f75375_write16 Greg KH
2012-03-01 21:39 ` [ 03/34] lib: proportion: lower PROP_MAX_SHIFT to 32 on 64-bit kernel Greg KH
2012-03-05 15:06 ` Jan Kara
2012-03-05 21:31 ` Fengguang Wu
2012-03-06 20:35 ` Jan Kara
2012-03-07 5:14 ` Fengguang Wu
2012-03-01 21:39 ` [ 04/34] relay: prevent integer overflow in relay_open() Greg KH
2012-03-01 21:39 ` [ 05/34] mac80211: timeout a single frame in the rx reorder buffer Greg KH
2012-03-01 21:39 ` [ 06/34] kernel.h: fix wrong usage of __ratelimit() Greg KH
2012-03-01 21:39 ` [ 07/34] printk_ratelimited(): fix uninitialized spinlock Greg KH
2012-03-01 21:39 ` [ 08/34] hwmon: (f75375s) Fix automatic pwm mode setting for F75373 & F75375 Greg KH
2012-03-01 21:39 ` [ 09/34] crypto: sha512 - Use binary and instead of modulus Greg KH
2012-03-01 21:39 ` [ 10/34] crypto: sha512 - Avoid stack bloat on i386 Greg KH
2012-03-01 21:39 ` Greg KH [this message]
2012-03-01 21:39 ` [ 12/34] Ban ecryptfs over ecryptfs Greg KH
2012-03-01 21:39 ` [ 13/34] Add mount option to check uid of device being mounted = expect uid, CVE-2011-1833 Greg KH
2012-03-01 21:39 ` [ 14/34] crypto: sha512 - use standard ror64() Greg KH
2012-03-01 21:39 ` [ 15/34] drm/radeon/kms: fix MSI re-arm on rv370+ Greg KH
2012-03-01 21:39 ` [ 16/34] ecryptfs: read on a directory should return EISDIR if not supported Greg KH
2012-03-01 21:39 ` [ 17/34] SCSI: 3w-9xxx fix bug in sgl loading Greg KH
2012-03-01 21:39 ` [ 18/34] ARM: 7321/1: cache-v7: Disable preemption when reading CCSIDR Greg KH
2012-03-01 21:39 ` [ 19/34] ARM: 7325/1: fix v7 boot with lockdep enabled Greg KH
2012-03-01 21:39 ` [ 20/34] USB: Added Kamstrup VID/PIDs to cp210x serial driver Greg KH
2012-03-01 21:39 ` [ 21/34] USB: Fix handoff when BIOS disables host PCI device Greg KH
2012-03-01 21:39 ` [ 22/34] xhci: Fix encoding for HS bulk/control NAK rate Greg KH
2012-03-01 21:39 ` [ 23/34] [media] hdpvr: fix race conditon during start of streaming Greg KH
2012-03-01 21:39 ` [ 24/34] eCryptfs: Use notify_change for truncating lower inodes Greg KH
2012-03-01 21:39 ` [ 25/34] eCryptfs: Remove extra d_delete in ecryptfs_rmdir Greg KH
2012-03-01 21:39 ` [ 26/34] eCryptfs: Clear i_nlink in rmdir Greg KH
2012-03-01 21:39 ` [ 27/34] cdrom: use copy_to_user() without the underscores Greg KH
2012-03-01 21:39 ` [ 28/34] autofs: work around unhappy compat problem on x86-64 Greg KH
2012-03-01 21:39 ` [ 29/34] Fix autofs compile without CONFIG_COMPAT Greg KH
2012-03-01 21:39 ` [ 30/34] compat: fix compile breakage on s390 Greg KH
2012-03-01 21:39 ` [ 31/34] PM: Print a warning if firmware is requested when tasks are frozen Greg KH
2012-03-01 21:39 ` [ 32/34] firmware loader: allow builtin firmware load even if usermodehelper is disabled Greg KH
2012-03-01 21:39 ` [ 33/34] PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled() Greg KH
2012-03-01 21:39 ` [ 34/34] PM / Sleep: Fix read_unlock_usermodehelper() call Greg KH
2012-03-02 7:19 ` [ 00/34] 2.6.32.58-longterm review Willy Tarreau
2012-03-02 13:51 ` Stefan Bader
2012-03-02 15:37 ` Greg KH
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