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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-23 11:24:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-23 11:24:12 -0700
commitf10f0481a5b58f8986f626d43f8534472f7776c2 (patch)
tree2022343dd7e0ec49fd61c8290625d88daa4b011e /include
parent9bc62afe03afdf33904f5e784e1ad68c50ff00bb (diff)
parent2da4a23599c263bd4a7658c2fe561cb3a73ea6ae (diff)
downloadlinux-f10f0481a5b58f8986f626d43f8534472f7776c2.tar.gz
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
Diffstat (limited to 'include')
-rw-r--r--include/linux/tracehook.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 3e80c4bc66f7..2564b7434b4d 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -197,6 +197,8 @@ static inline void tracehook_notify_resume(struct pt_regs *regs)
 
 	mem_cgroup_handle_over_high();
 	blkcg_maybe_throttle_current();
+
+	rseq_handle_notify_resume(NULL, regs);
 }
 
 /*