From: "Paul E. McKenney" <[email protected]>
To: kernel test robot <[email protected]>
Cc: Frederic Weisbecker <[email protected]>,
[email protected],
GNU/Weeb Mailing List <[email protected]>,
[email protected]
Subject: Re: [ammarfaizi2-block:paulmck/linux-rcu/pmladek.2022.06.15a 133/140] vmlinux.o: warning: objtool: __ct_user_exit+0x41: call to __kasan_check_read() leaves .noinstr.text section
Date: Wed, 15 Jun 2022 13:40:39 -0700 [thread overview]
Message-ID: <20220615204039.GI1790663@paulmck-ThinkPad-P17-Gen-1> (raw)
In-Reply-To: <[email protected]>
On Thu, Jun 16, 2022 at 04:26:16AM +0800, kernel test robot wrote:
> tree: https://github.com/ammarfaizi2/linux-block paulmck/linux-rcu/pmladek.2022.06.15a
> head: 0ba7324b44282870af740a5a121add62c7f5f730
> commit: db21b02f8044e812f8a5e3811f602409290e3ede [133/140] context_tracking: Convert state to atomic_t
> config: x86_64-randconfig-r003-20220516 (https://download.01.org/0day-ci/archive/20220616/[email protected]/config)
> compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
> reproduce (this is a W=1 build):
> # https://github.com/ammarfaizi2/linux-block/commit/db21b02f8044e812f8a5e3811f602409290e3ede
> git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
> git fetch --no-tags ammarfaizi2-block paulmck/linux-rcu/pmladek.2022.06.15a
> git checkout db21b02f8044e812f8a5e3811f602409290e3ede
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <[email protected]>
>
> All warnings (new ones prefixed by >>):
>
> >> vmlinux.o: warning: objtool: __ct_user_exit+0x41: call to __kasan_check_read() leaves .noinstr.text section
> >> vmlinux.o: warning: objtool: __ct_user_enter+0x7f: call to __kasan_check_read() leaves .noinstr.text section
Marco, Dmitry, my guess is that this is due to the ct->active check in
both functions. Are we supposed to do something to make this sort of
thing safe for KASAN?
Thanx, Paul
next prev parent reply other threads:[~2022-06-15 20:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-15 20:26 [ammarfaizi2-block:paulmck/linux-rcu/pmladek.2022.06.15a 133/140] vmlinux.o: warning: objtool: __ct_user_exit+0x41: call to __kasan_check_read() leaves .noinstr.text section kernel test robot
2022-06-15 20:40 ` Paul E. McKenney [this message]
2022-06-15 21:17 ` Paul E. McKenney
2022-06-16 8:19 ` Marco Elver
2022-06-16 13:40 ` Paul E. McKenney
2022-06-16 16:44 ` Paul E. McKenney
2022-06-16 17:32 ` Marco Elver
2022-06-16 17:49 ` Paul E. McKenney
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