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ref_tracker: use %p instead of %px in debugfs dentry name

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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: 65b584f536 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir")
Reported-by: Kees Cook <kees@kernel.org>
Closes: https://lore.kernel.org/netdev/202507301603.62E553F93@keescook/
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jeff Layton 2025-08-08 07:45:23 -04:00 • committed by Jakub Kicinski
parent 61aaca8b89
commit 52966bf71d
1 changed files with 1 additions and 1 deletions
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2
lib/ref_tracker.c
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@ -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)) {