imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-10-29 13:23:23 +01:00
Code Issues Packages Projects Releases Wiki Activity

debugfs: be more robust at handling improper input in debugfs_lookup()

Browse Source 
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.

Cc: "Rafael J. Wysocki" <[email protected]>
Cc: stable <[email protected]>
Reported-by: Michael Walle <[email protected]>
Tested-by: Michael Walle <[email protected]>
Tested-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Greg Kroah-Hartman committed 2021-02-18 16:23:46 +01:00
1 parent 471b12c43f
commit bc6de804d3
1 file changed
+1 -1
Download Patch File Download Diff File Expand all files Collapse all files
fs/debugfs/inode.c
+1 -1
View File
@@ -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)