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[RESUBMIT,bpf-next,0/2] Fix copy_from_user_nofault()

Message ID 20230329193931.320642-1-dev@der-flo.net (mailing list archive)
Headers show
Series Fix copy_from_user_nofault() | expand

Message

Florian Lehner March 29, 2023, 7:39 p.m. UTC 
The original patch got submitted by Alexei Starovoitov with [0] and
fixes issues that got also reported in [1].

This resubmission adds !pagefault_disabled() to the check in
check_heap_object(). 

[0] https://lore.kernel.org/all/20230118051443.78988-1-alexei.starovoitov@gmail.com/
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1033398

Alexei Starovoitov (2):
  mm: Fix copy_from_user_nofault().
  perf: Fix arch_perf_out_copy_user().

 arch/x86/include/asm/perf_event.h |  2 --
 arch/x86/lib/Makefile             |  2 +-
 arch/x86/lib/usercopy.c           | 55 -------------------------------
 kernel/events/internal.h          | 16 +--------
 mm/maccess.c                      | 54 +++++++++++++++++++++++++-----
 mm/usercopy.c                     |  2 +-
 6 files changed, 49 insertions(+), 82 deletions(-)
 delete mode 100644 arch/x86/lib/usercopy.c