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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-11-03 21:56:06 +0100 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2010-01-20 05:32:11 +0100 |
| commit | 38e3eaeedcac75360af8a92e7b66956ec4f334e5 (patch) | |
| tree | ba194b5451033e29137d4c797edd8d508c470d42 /fs/ecryptfs/file.c | |
| parent | eCryptfs: Add getattr function (diff) | |
| download | linux-38e3eaeedcac75360af8a92e7b66956ec4f334e5.tar.xz linux-38e3eaeedcac75360af8a92e7b66956ec4f334e5.zip | |
eCryptfs: Remove mmap from directory operations
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.
https://bugs.launchpad.net/ecryptfs/+bug/400443
Reported-by: Adrian C. <anrxc@sysphere.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Diffstat (limited to 'fs/ecryptfs/file.c')
| -rw-r--r-- | fs/ecryptfs/file.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index 9e944057001b..3efc7fdc3c39 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -299,7 +299,6 @@ static int ecryptfs_ioctl(struct inode *inode, struct file *file, const struct file_operations ecryptfs_dir_fops = { .readdir = ecryptfs_readdir, .ioctl = ecryptfs_ioctl, - .mmap = generic_file_mmap, .open = ecryptfs_open, .flush = ecryptfs_flush, .release = ecryptfs_release, |