The following commit has been merged into the irq/irqchip-next branch of irqchip:
Commit-ID: 2ad058730606cb68e75177ee7e330e1f94ab7b4b Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/2ad058730606cb68e75177ee7e330e1f94ab7b4b Author: Greg Kroah-Hartman <[email protected]> AuthorDate: Thu, 18 Feb 2021 11:08:17 +01:00 Committer: Marc Zyngier <[email protected]> CommitterDate: Thu, 18 Feb 2021 11:39:18 debugfs: be more robust at handling improper input in debugfs_lookup() debugfs_lookup() doesn't like it if it is passed an illegal name pointer, or if the filesystem isn't even initialized yet. If either of these happen, it will crash the system, so fix it up by properly testing for valid input and that we are up and running before trying to find a file in the filesystem. Reported-by: Michael Walle <[email protected]> Tested-by: Michael Walle <[email protected]> Tested-by: Marc Zyngier <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Marc Zyngier <[email protected]> Link: https://lore.kernel.org/r/[email protected] --- fs/debugfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 2fcf664..bbeb563 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -297,7 +297,7 @@ struct dentry *debugfs_lookup(const char *name, struct dentry *parent) { struct dentry *dentry; - if (IS_ERR(parent)) + if (!debugfs_initialized() || IS_ERR_OR_NULL(name) || IS_ERR(parent)) return NULL; if (!parent)
