diff options
| author | Ricardo Neri <ricardo.neri-calderon@linux.intel.com> | 2017-10-27 13:25:37 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-11-01 21:50:10 +0100 |
| commit | ed594e4ba5bfe268d63d7cee3c1a827e3dd5056f (patch) | |
| tree | 59d26b7e4b2b7d7cb7c7e70cfbae5c9a2f4f116c /arch/x86/lib | |
| parent | 32542ee295bec38e5e1608f8c9d6d28e5a7e6112 (diff) | |
x86/insn-eval: Do not BUG on invalid register type
We are not in a critical failure path. The invalid register type is caused
when trying to decode invalid instruction bytes from a user-space program.
Thus, simply print an error message. To prevent this warning from being
abused from user space programs, use the rate-limited variant of pr_err().
along with a descriptive prefix.
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: ricardo.neri@intel.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@intel.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Chen Yucong <slaoub@gmail.com>
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Garnier <thgarnie@google.com>
Link: https://lkml.kernel.org/r/1509135945-13762-11-git-send-email-ricardo.neri-calderon@linux.intel.com
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/insn-eval.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c index df9418c43356..4931d9252dde 100644 --- a/arch/x86/lib/insn-eval.c +++ b/arch/x86/lib/insn-eval.c @@ -5,10 +5,14 @@ */ #include <linux/kernel.h> #include <linux/string.h> +#include <linux/ratelimit.h> #include <asm/inat.h> #include <asm/insn.h> #include <asm/insn-eval.h> +#undef pr_fmt +#define pr_fmt(fmt) "insn: " fmt + enum reg_type { REG_TYPE_RM = 0, REG_TYPE_INDEX, @@ -85,9 +89,8 @@ static int get_reg_offset(struct insn *insn, struct pt_regs *regs, break; default: - pr_err("invalid register type"); - BUG(); - break; + pr_err_ratelimited("invalid register type: %d\n", type); + return -EINVAL; } if (regno >= nr_registers) { |