diff options
| author | Amir Goldstein <[email protected]> | 2025-02-03 22:32:04 +0000 |
|---|---|---|
| committer | Christian Brauner <[email protected]> | 2025-02-07 09:27:26 +0000 |
| commit | 2a42754b3104d78a2bc7a2ad8844427411c76ca6 (patch) | |
| tree | b49120f2679d799f249cacb5c675cdf509cccbce /net/socket.c | |
| parent | fsnotify: use accessor to set FMODE_NONOTIFY_* (diff) | |
| download | kernel-2a42754b3104d78a2bc7a2ad8844427411c76ca6.tar.gz kernel-2a42754b3104d78a2bc7a2ad8844427411c76ca6.zip | |
fsnotify: disable notification by default for all pseudo files
Most pseudo files are not applicable for fsnotify events at all,
let alone to the new pre-content events.
Disable notifications to all files allocated with alloc_file_pseudo()
and enable legacy inotify events for the specific cases of pipe and
socket, which have known users of inotify events.
Pre-content events are also kept disabled for sockets and pipes.
Fixes: 20bf82a898b6 ("mm: don't allow huge faults for files with pre content watches")
Reported-by: Alex Williamson <[email protected]>
Closes: https://lore.kernel.org/linux-fsdevel/[email protected]/
Suggested-by: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/linux-fsdevel/CAHk-=wi2pThSVY=zhO=ZKxViBj5QCRX-=AS2+rVknQgJnHXDFg@mail.gmail.com/
Tested-by: Alex Williamson <[email protected]>
Signed-off-by: Amir Goldstein <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c index 262a28b59c7f..28bae5a94234 100644 --- a/net/socket.c +++ b/net/socket.c @@ -479,6 +479,11 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) sock->file = file; file->private_data = sock; stream_open(SOCK_INODE(sock), file); + /* + * Disable permission and pre-content events, but enable legacy + * inotify events for legacy users. + */ + file_set_fsnotify_mode(file, FMODE_NONOTIFY_PERM); return file; } EXPORT_SYMBOL(sock_alloc_file); |