Commit 31c779f2 authored by Yangxi Xiang's avatar Yangxi Xiang Committed by Greg Kroah-Hartman
Browse files

devtmpfs: fix the dangling pointer of global devtmpfsd thread 



When the devtmpfs fails to mount, a dangling pointer still remains in
global. Specifically, the err variable is passed by a pointer to the
devtmpfsd. When the devtmpfsd exits, it sets the error and completes the
setup_done. In this situation, the thread pointer is not set to null.
After the devtmpfsd exited, the devtmpfs can wakes up the destroyed
devtmpfsd thread by wake_up_process if a device change event comes.

Signed-off-by: default avatarYangxi Xiang <xyangxi5@gmail.com>
Link: https://lore.kernel.org/r/20220627120409.11174-1-xyangxi5@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 38a523a2

drivers/base/devtmpfs.c

+1 −0
Original line number Diff line number Diff line
@@ -482,6 +482,7 @@ int __init devtmpfs_init(void) 
	if (err) {

		printk(KERN_ERR "devtmpfs: unable to create devtmpfs %i\n", err);

		unregister_filesystem(&dev_fs_type);

		thread = NULL;

		return err;

	}