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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/29771] New: Restore IPC_64 support in sysvipc *ctl
 functions
Date: Thu, 10 Nov 2022 10:36:34 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Version: 2.37
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: fweimer at redhat dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29771

            Bug ID: 29771
           Summary: Restore IPC_64 support in sysvipc *ctl functions
           Product: glibc
           Version: 2.37
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---
             Flags: security-

In order to call SHM_STAT_ANY kernel operations through shmctl on older gli=
bc,
it was necessary to pass SHM_STAT_ANY | IPC_64 in the command argument,
otherwise the ipc system call would be invoked without the IPC_64 flag, giv=
ing
unexpected results on powerpc64le-linux-gnu at least.

Current glibc no longer supports that because it checks the command argument
for validity without masking the IPC_64 bit.

Patch posted:

[PATCH] Linux: Support __IPC_64 in sysvctl *ctl command arguments
<https://sourceware.org/pipermail/libc-alpha/2022-November/143343.html>

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