[Bug nptl/28407] New: pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[Bug nptl/28407] New: pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28407

            Bug ID: 28407
           Summary: pthread_kill assumes that kill (getpid ()) is
                    equivalent to tgkill (getpid (), gettid())
           Product: glibc
           Version: 2.34
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nptl
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

kill sends the signal to the process, tgkill sends it to the current thread. It
does more than merely avoiding the TID reuse raise.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug nptl/28407] pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28407

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |fweimer at redhat dot com
             Status|NEW                         |ASSIGNED
                 CC|                            |fweimer at redhat dot com
              Flags|                            |security-

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug nptl/28407] pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[mhofmann at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28407

Michael Hofmann <mhofmann at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mhofmann at redhat dot com

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug nptl/28407] pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28407

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Patch posted:
https://sourceware.org/pipermail/libc-alpha/2021-October/131610.html

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug nptl/28407] pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid())

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28407

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.35
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
Fixed for glibc 2.35 via:

commit eae81d70574e923ce3c59078b8df857ae192efa6
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Oct 1 18:16:41 2021 +0200

    nptl: pthread_kill must send signals to a specific thread [BZ #28407]

    The choice between the kill vs tgkill system calls is not just about
    the TID reuse race, but also about whether the signal is sent to the
    whole process (and any thread in it) or to a specific thread.

    This was caught by the openposix test suite:

      LTP: openposix test suite - FAIL: SIGUSR1 is member of new thread
pendingset.
      <https://gitlab.com/cki-project/kernel-tests/-/issues/764>

    Fixes commit 526c3cf11ee9367344b6b15d669e4c3cb461a2be ("nptl: Fix race
    between pthread_kill and thread exit (bug 12889)").

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
    Tested-by: Carlos O'Donell <carlos@redhat.com>

-- 
You are receiving this mail because:
You are on the CC list for the bug.