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SubjectRe: [PATCH v3 09/10] lib/refcount: Remove unused 'refcount_error_report()' function
On Mon, Oct 07, 2019 at 04:47:02PM +0100, Will Deacon wrote:
> 'refcount_error_report()' has no callers. Remove it.

Seems like this could be collapsed into patch 8? Either way:

Acked-by: Kees Cook <keescook@chromium.org>

-Kees

>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Elena Reshetova <elena.reshetova@intel.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Kees Cook <keescook@chromium.org>
> Signed-off-by: Will Deacon <will@kernel.org>
> ---
> include/linux/kernel.h | 7 -------
> kernel/panic.c | 11 -----------
> 2 files changed, 18 deletions(-)
>
> diff --git a/include/linux/kernel.h b/include/linux/kernel.h
> index d83d403dac2e..09f759228e3f 100644
> --- a/include/linux/kernel.h
> +++ b/include/linux/kernel.h
> @@ -328,13 +328,6 @@ extern int oops_may_print(void);
> void do_exit(long error_code) __noreturn;
> void complete_and_exit(struct completion *, long) __noreturn;
>
> -#ifdef CONFIG_ARCH_HAS_REFCOUNT
> -void refcount_error_report(struct pt_regs *regs, const char *err);
> -#else
> -static inline void refcount_error_report(struct pt_regs *regs, const char *err)
> -{ }
> -#endif
> -
> /* Internal, do not use. */
> int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
> int __must_check _kstrtol(const char *s, unsigned int base, long *res);
> diff --git a/kernel/panic.c b/kernel/panic.c
> index 47e8ebccc22b..10d05fd4f9c3 100644
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -670,17 +670,6 @@ EXPORT_SYMBOL(__stack_chk_fail);
>
> #endif
>
> -#ifdef CONFIG_ARCH_HAS_REFCOUNT
> -void refcount_error_report(struct pt_regs *regs, const char *err)
> -{
> - WARN_RATELIMIT(1, "refcount_t %s at %pB in %s[%d], uid/euid: %u/%u\n",
> - err, (void *)instruction_pointer(regs),
> - current->comm, task_pid_nr(current),
> - from_kuid_munged(&init_user_ns, current_uid()),
> - from_kuid_munged(&init_user_ns, current_euid()));
> -}
> -#endif
> -
> core_param(panic, panic_timeout, int, 0644);
> core_param(panic_print, panic_print, ulong, 0644);
> core_param(pause_on_oops, pause_on_oops, int, 0644);
> --
> 2.23.0.581.g78d2f28ef7-goog
>

--
Kees Cook

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