linux

iv/linux

History

Linus Torvalds f10f0481a5 A fix for a bug with restartable sequences and KVM. KVM's handling

of TIF_NOTIFY_RESUME, e.g. for task migration, clears the flag without
 informing rseq and leads to stale data in userspace's rseq struct.
 
 I'm sending this as a separate pull request since it's not code
 that I usually touch.  In particular, patch 2 ("entry: rseq: Call
 rseq_handle_notify_resume() in tracehook_notify_resume()") is just a
 cleanup to try and make future bugs less likely.  If you prefer this to
 be sent via Thomas and only in 5.16, please speak up.
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmFLPYgUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroNCowf6A9pTuDspCC2IRICfQnHj/Q/Xc7HH
 UmwYo26GctfYaq9AyIAGzcRx3iOEGjb9fZVJ6mzPUGIygio9ZyuiPHogf7lMAb+x
 39ts5uSOp+N+8e0fvX578WFfmG5hQa4Tp9W3T2Y5KsVgK2Nf8F08DckzIgD8cbkN
 NQKTRIi8AYgb20y3NFZjzsPRxF8850QK7xVCI+LBjryyWpEGT5ZsthrYUeexiJPz
 XN+VOYJen5GXVBCar2JbA7EVSrMZbKSy+M3fJ1vuW5dZHySaiu69JXJHop71jTnJ
 5BGue917MfH6RTDzIFFUcg7NmwcuXHpw4dsFeiyExYFNw1uWWQpk0efC1g==
 =/xlE
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-rseq' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull rseq fixes from Paolo Bonzini:
 "A fix for a bug with restartable sequences and KVM.

  KVM's handling of TIF_NOTIFY_RESUME, e.g. for task migration, clears
  the flag without informing rseq and leads to stale data in userspace's
  rseq struct"

* tag 'for-linus-rseq' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: selftests: Remove __NR_userfaultfd syscall fallback
  KVM: selftests: Add a test for KVM_RUN+rseq to detect task migration bugs
  tools: Move x86 syscall number fallbacks to .../uapi/
  entry: rseq: Call rseq_handle_notify_resume() in tracehook_notify_resume()
  KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest

2021-09-23 11:24:12 -07:00

alpha

alpha: enable GENERIC_PCI_IOMAP unconditionally

2021-09-19 10:37:00 -07:00

arc

Merge branch 'akpm' (patches from Andrew)

2021-09-08 12:55:35 -07:00

arm

entry: rseq: Call rseq_handle_notify_resume() in tracehook_notify_resume()

2021-09-22 10:24:01 -04:00

arm64

entry: rseq: Call rseq_handle_notify_resume() in tracehook_notify_resume()