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9p: fix mmap to be read-only

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v9fs was allowing writable mmap which could lead to kernel BUG() cases.
This sets the mmap function to generic_file_readonly_mmap which (correctly)
returns an error to applications which open mmap for writing.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen 2008-02-06 19:25:05 -06:00
parent d199d652c5
commit 14b8869ff4
1 changed files with 2 additions and 2 deletions
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4
fs/9p/vfs_file.c
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@ -184,7 +184,7 @@ static const struct file_operations v9fs_cached_file_operations = {
.open = v9fs_file_open, .open = v9fs_file_open,
.release = v9fs_dir_release, .release = v9fs_dir_release,
.lock = v9fs_file_lock, .lock = v9fs_file_lock,
.mmap = generic_file_mmap, .mmap = generic_file_readonly_mmap,
}; };
const struct file_operations v9fs_file_operations = { const struct file_operations v9fs_file_operations = {
@ -194,5 +194,5 @@ const struct file_operations v9fs_file_operations = {
.open = v9fs_file_open, .open = v9fs_file_open,
.release = v9fs_dir_release, .release = v9fs_dir_release,
.lock = v9fs_file_lock, .lock = v9fs_file_lock,
.mmap = generic_file_mmap, .mmap = generic_file_readonly_mmap,
}; };