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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/107472] New: Support for the Linux kernel's
 memory-management APIs
Date: Mon, 31 Oct 2022 14:13:32 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: analyzer
X-Bugzilla-Version: 13.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: dmalcolm at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107472

            Bug ID: 107472
           Summary: Support for the Linux kernel's memory-management APIs
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: analyzer
          Assignee: dmalcolm at gcc dot gnu.org
          Reporter: dmalcolm at gcc dot gnu.org
        Depends on: 106302
            Blocks: 106358
  Target Milestone: ---

A suggestion at LPC 2022 was that -fanalyzer could gain knowledge (perhaps =
via
a plugin) about the behavior of the Linux kernel's memory allocation routin=
es.

See https://www.kernel.org/doc/html/latest/core-api/memory-allocation.html

In particular, note the GPF flags; there seem to be a bunch of contextual r=
ules
about which flags should be set, which perhaps a -fanalyzer plugin could
enforce.  Grokking all these flags seems like another instance of PR 106302.

Plus we ought to do sm-malloc.cc-style checking for leaks, double-free, etc.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106302
[Bug 106302] RFE: provide a way for -fanalyzer to use target flags
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106358
[Bug 106358] [meta-bug] tracker bug for building the Linux kernel with
-fanalyzer=