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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/111736] Address sanitizer is not compatible with
 named address spaces
Date: Tue, 21 May 2024 08:19:14 +0000
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X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: sanitizer
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: addr-space, wrong-code
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X-Bugzilla-Who: ubizjak at gmail dot com
X-Bugzilla-Status: REOPENED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111736

Uro=C5=A1 Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #45 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
Yes, I can confirm the Oops due to sanitization of %gs: prefixed variable:

  307eee:       48 c7 c0 00 00 00 00    mov    $0x0,%rax
                        307ef1: R_X86_64_32S    cpu_tlbstate_shared
  307ef5:       48 ba 00 00 00 00 00    movabs $0xdffffc0000000000,%rdx
  307efc:       fc ff df=20
  307eff:       48 c1 e8 03             shr    $0x3,%rax
  307f03:       0f b6 04 10             movzbl (%rax,%rdx,1),%eax
  307f07:       84 c0                   test   %al,%al
  307f09:       74 06                   je     307f11 <__text_poke+0x4a1>
  307f0b:       0f 8e f0 07 00 00       jle    308701 <__text_poke+0xc91>
  307f11:       65 44 0f b6 35 00 00    movzbl %gs:0x0(%rip),%r14d        #
307f1a <__text_poke+0x4aa>
  307f18:       00 00=20
                        307f16: R_X86_64_PC32   cpu_tlbstate_shared-0x4=