[PATCH v2 0/6] fix process shared pthread mutexes

[Stephen Hemminger]

On Tue, 14 Apr 2026 07:39:52 -0700
Stephen Hemminger <stephen at networkplumber.org> wrote:

> Several drivers and the ethdev layer initialize pthread mutexes
> in shared memory with default (process-private) attributes.
> This is undefined behavior when secondary processes use them.
> 
> This series adds PTHREAD_PROCESS_SHARED to all affected mutexes.
> All are on control paths (firmware mailbox, hotplug, flow ops,
> PHY negotiation) where sleeping is acceptable.
> 
> See POSIX spec:
> https://pubs.opengroup.org/onlinepubs/009696899/functions/pthread_mutexattr_getpshared.html
> 
> Bugzilla ID: 662
> 
> v2 - fix build on Windows which does not need this.
> 
> Stephen Hemminger (6):
>   ethdev: fix flow_ops_mutex for multi-process
>   net/failsafe: fix hotplug_mutex for multi-process
>   net/atlantic: fix mbox_mutex for multi-process
>   net/axgbe: fix mutexes for multi-process
>   net/bnxt: fix mutexes for multi-process
>   net/hinic: fix mutexes for multi-process
> 
>  drivers/net/atlantic/atl_ethdev.c      | 14 +++++++++++++-
>  drivers/net/axgbe/axgbe_ethdev.c       | 19 +++++++++++++++----
>  drivers/net/bnxt/bnxt_ethdev.c         | 11 ++++++-----
>  drivers/net/bnxt/bnxt_txq.c            |  3 ++-
>  drivers/net/bnxt/bnxt_util.c           | 13 +++++++++++++
>  drivers/net/bnxt/bnxt_util.h           |  2 ++
>  drivers/net/bnxt/tf_ulp/bnxt_ulp.c     |  2 +-
>  drivers/net/bnxt/tf_ulp/bnxt_ulp_tf.c  |  2 +-
>  drivers/net/bnxt/tf_ulp/bnxt_ulp_tfc.c |  2 +-
>  drivers/net/failsafe/failsafe.c        | 15 ++++++++++++---
>  drivers/net/hinic/base/hinic_compat.h  | 13 ++++++++++++-
>  lib/ethdev/ethdev_driver.c             | 22 +++++++++++++++++++++-
>  12 files changed, 99 insertions(+), 19 deletions(-)
> 

Applied to next-net with helper.