From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ua0-f199.google.com (mail-ua0-f199.google.com [209.85.217.199]) by kanga.kvack.org (Postfix) with ESMTP id 0710A6B0005 for ; Wed, 7 Mar 2018 03:09:09 -0500 (EST) Received: by mail-ua0-f199.google.com with SMTP id y43so954165uac.16 for ; Wed, 07 Mar 2018 00:09:09 -0800 (PST) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id l128sor7493680vkb.127.2018.03.07.00.09.07 for (Google Transport Security); Wed, 07 Mar 2018 00:09:07 -0800 (PST) MIME-Version: 1.0 From: Li Wang Date: Wed, 7 Mar 2018 16:09:06 +0800 Message-ID: Subject: [bug?] Access was denied by memory protection keys in execute-only address Content-Type: multipart/alternative; boundary="001a114268ecc061540566ce12b4" Sender: owner-linux-mm@kvack.org List-ID: To: linuxram@us.ibm.com, mpe@ellerman.id.au Cc: Jan Stancek , ltp@lists.linux.it, linux-mm@kvack.org --001a114268ecc061540566ce12b4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, ltp/mprotect04[1] crashed by SEGV_PKUERR on ppc64(LPAR on P730, Power 8 8247-22L) with kernel-v4.16.0-rc4. 10000000-10020000 r-xp 00000000 fd:00 167223 mprotect04 10020000-10030000 r--p 00010000 fd:00 167223 mprotect04 10030000-10040000 rw-p 00020000 fd:00 167223 mprotect04 1001a380000-1001a3b0000 rw-p 00000000 00:00 0 [heap] 7fffa6c60000-7fffa6c80000 --xp 00000000 00:00 0 =E2=80=8B =E2=80=8B&exec_func =3D 0x10030170=E2=80=8B =E2=80=8B&func =3D 0x7fffa6c60170=E2=80=8B =E2=80=8BWhile perform =E2=80=8B "(*func)();" we get the =E2=80=8Bsegmentation fault. =E2=80=8B =E2=80=8Bstrace log:=E2=80=8B ------------------- =E2=80=8Bmprotect(0x7fffaed00000, 131072, PROT_EXEC) =3D 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) =3D 0 --- SIGSEGV {si_signo=3DSIGSEGV, si_code=3DSEGV_PKUERR, si_addr=3D0x7fffaed= 00170} ---=E2=80=8B [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/sysc= alls/mprotect/mprotect04.c =E2=80=8B --=20 Li Wang liwang@redhat.com --001a114268ecc061540566ce12b4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,

ltp/mprotect04[1] crashed by SEGV_PKUERR on ppc64(L= PAR on P730, Power 8 8247-22L) with kernel-v4.16.0-rc4.

1000= 0000-10020000 r-xp 00000000 fd:00 167223=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 mprotect04
10020000-10030000 r--p 00010000 f= d:00 167223=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 mpr= otect04
10030000-10040000 rw-p 00020000 fd:00 167223=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 mprotect04
1001a380000-1001a3= b0000 rw-p 00000000 00:00 0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 [heap]
7fffa6c60000-7fffa6c80000 --xp 00000000 00:00 0 =E2=80=8B<= /span>

=E2=80=8B&exec_func =3D 0x10030170=E2=80=8B

=E2=80= =8B&func =3D 0x7fffa6c60170=E2=80=8B

=E2=80= =8BWhile perform =E2=80=8B
"(*func)();" we get the
=E2=80=8Bse= gmentation fault.
=E2=80=8B

=E2=80=8Bstrace log:=E2= =80=8B

-------------------
=E2=80=8Bmprotect(= 0x7fffaed00000, 131072, PROT_EXEC) =3D 0
rt_sigprocmask(SIG_BLOCK, NULL,= [], 8) =C2=A0=3D 0
--- SIGSEGV {si_signo=3DSIGSEGV, si_code=3DSEGV_PKUE= RR, si_addr=3D0x7fffaed00170} ---=E2=80=8B



[1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/sys= calls/mprotect/mprotect04.c=E2=80=8B

--
Li Wang
liwang@redhat.com
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