Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 14b8869f authored by Eric Van Hensbergen's avatar Eric Van Hensbergen
Browse files

9p: fix mmap to be read-only 



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: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent d199d652

fs/9p/vfs_file.c

+2 −2
Original line number Diff line number Diff line
@@ -184,7 +184,7 @@ static const struct file_operations v9fs_cached_file_operations = { 
	.open = v9fs_file_open,

	.release = v9fs_dir_release,

	.lock = v9fs_file_lock,

	.mmap = generic_file_mmap,

	.mmap = generic_file_readonly_mmap,

};



const struct file_operations v9fs_file_operations = {
@@ -194,5 +194,5 @@ const struct file_operations v9fs_file_operations = { 
	.open = v9fs_file_open,

	.release = v9fs_dir_release,

	.lock = v9fs_file_lock,

	.mmap = generic_file_mmap,

	.mmap = generic_file_readonly_mmap,

};