From: Kees Cook keescook@chromium.org
commit 60f7bb66b88b649433bf700acfc60c3f24953871 upstream.
The kprobe show() functions were using "current"'s creds instead of the file opener's creds for kallsyms visibility. Fix to use seq_file->file->f_cred.
Cc: Masami Hiramatsu mhiramat@kernel.org Cc: stable@vger.kernel.org Fixes: 81365a947de4 ("kprobes: Show address of kprobes if kallsyms does") Fixes: ffb9bd68ebdb ("kprobes: Show blacklist addresses as same as kallsyms does") Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- kernel/kprobes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2362,7 +2362,7 @@ static void report_probe(struct seq_file else kprobe_type = "k";
- if (!kallsyms_show_value(current_cred())) + if (!kallsyms_show_value(pi->file->f_cred)) addr = NULL;
if (sym) @@ -2463,7 +2463,7 @@ static int kprobe_blacklist_seq_show(str * If /proc/kallsyms is not showing kernel address, we won't * show them here either. */ - if (!kallsyms_show_value(current_cred())) + if (!kallsyms_show_value(m->file->f_cred)) seq_printf(m, "0x%px-0x%px\t%ps\n", NULL, NULL, (void *)ent->start_addr); else