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From: "agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug runtime/30456] New: Kernel 5.18+ retired set_fs() and replaced
 it with the user_access_begin/end() pair for userland memory accesses
Date: Wed, 17 May 2023 00:21:41 +0000
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X-Bugzilla-Type: new
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X-Bugzilla-Product: systemtap
X-Bugzilla-Component: runtime
X-Bugzilla-Version: unspecified
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: agentzh at gmail dot com
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X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: systemtap at sourceware dot org
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30456

            Bug ID: 30456
           Summary: Kernel 5.18+ retired set_fs() and replaced it with the
                    user_access_begin/end() pair for userland memory
                    accesses
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: agentzh at gmail dot com
  Target Milestone: ---

Currently, the stap runtime does nothing for kernel 5.18+ without set_fs(),
which is wrong at least on x86 for userland accesses.

I'm preparing a fix by switching to the new replacement API,
user_access_begin() and user_access_end().

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