From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 86554385701F; Sun, 20 Sep 2020 00:41:37 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 86554385701F From: "ldv at sourceware dot org" To: glibc-bugs@sourceware.org Subject: [Bug libc/26637] New: semctl SEM_STAT_ANY fails to pass the buffer specified by the caller to the kernel Date: Sun, 20 Sep 2020 00:41:37 +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: 2.32 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ldv at sourceware dot org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: security- X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc target_milestone flagtypes.name Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: glibc-bugs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Glibc-bugs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 20 Sep 2020 00:41:37 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D26637 Bug ID: 26637 Summary: semctl SEM_STAT_ANY fails to pass the buffer specified by the caller to the kernel Product: glibc Version: 2.32 Status: NEW Severity: normal Priority: P2 Component: libc Assignee: unassigned at sourceware dot org Reporter: ldv at sourceware dot org CC: drepper.fsp at gmail dot com Target Milestone: --- Flags: security- The kernel receives garbage instead of union semun.buf address specified by= the caller. $ git --no-pager grep -wc SEM_STAT_ANY sysdeps/unix/sysv/linux/semctl.c sysdeps/unix/sysv/linux/semctl.c:2 $ git --no-pager grep -wc SEM_STAT sysdeps/unix/sysv/linux/semctl.c sysdeps/unix/sysv/linux/semctl.c:8 A tentative fix: diff --git a/sysdeps/unix/sysv/linux/semctl.c b/sysdeps/unix/sysv/linux/semctl.c index f131a26fc7..1cdabde8f2 100644 --- a/sysdeps/unix/sysv/linux/semctl.c +++ b/sysdeps/unix/sysv/linux/semctl.c @@ -102,6 +102,7 @@ semun64_to_ksemun64 (int cmd, union semun64 semun64, r.array =3D semun64.array; break; case SEM_STAT: + case SEM_STAT_ANY: case IPC_STAT: case IPC_SET: r.buf =3D buf; @@ -150,6 +151,7 @@ __semctl64 (int semid, int semnum, int cmd, ...) case IPC_STAT: /* arg.buf */ case IPC_SET: case SEM_STAT: + case SEM_STAT_ANY: case IPC_INFO: /* arg.__buf */ case SEM_INFO: va_start (ap, cmd); @@ -238,6 +240,7 @@ semun_to_semun64 (int cmd, union semun semun, struct __semid64_ds *semid64) r.array =3D semun.array; break; case SEM_STAT: + case SEM_STAT_ANY: case IPC_STAT: case IPC_SET: r.buf =3D semid64; @@ -267,6 +270,7 @@ __semctl (int semid, int semnum, int cmd, ...) case IPC_STAT: /* arg.buf */ case IPC_SET: case SEM_STAT: + case SEM_STAT_ANY: case IPC_INFO: /* arg.__buf */ case SEM_INFO: va_start (ap, cmd); @@ -321,6 +325,7 @@ __semctl_mode16 (int semid, int semnum, int cmd, ...) case IPC_STAT: /* arg.buf */ case IPC_SET: case SEM_STAT: + case SEM_STAT_ANY: case IPC_INFO: /* arg.__buf */ case SEM_INFO: va_start (ap, cmd); @@ -354,6 +359,7 @@ __old_semctl (int semid, int semnum, int cmd, ...) case IPC_STAT: /* arg.buf */ case IPC_SET: case SEM_STAT: + case SEM_STAT_ANY: case IPC_INFO: /* arg.__buf */ case SEM_INFO: va_start (ap, cmd); --=20 You are receiving this mail because: You are on the CC list for the bug.=