As Kees points out, this is a kernel address leak, and debugging is not a sufficiently good reason to expose the real kernel address. Fixes: 65b584f53611 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir") Reported-by: Kees Cook Closes: https://lore.kernel.org/netdev/202507301603.62E553F93@keescook/ Signed-off-by: Jeff Layton --- Resending since I didn't get a response from Andrew. This time I've included netdev in the mailing list in case Jakub wants to pick this up instead. --- lib/ref_tracker.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index a9e6ffcff04b1da162a5a6add6bff075c2c9405e..cce12287708ea43e9eda9fe42f82a80423cea4e3 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -434,7 +434,7 @@ void ref_tracker_dir_debugfs(struct ref_tracker_dir *dir) if (dentry && !xa_is_err(dentry)) return; - ret = snprintf(name, sizeof(name), "%s@%px", dir->class, dir); + ret = snprintf(name, sizeof(name), "%s@%p", dir->class, dir); name[sizeof(name) - 1] = '\0'; if (ret < sizeof(name)) { --- base-commit: 260f6f4fda93c8485c8037865c941b42b9cba5d2 change-id: 20250731-reftrack-dbgfs-f99ad92068bc Best regards, -- Jeff Layton