usercopy: Include offset in hardened usercopy report

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This refactors the hardened usercopy code so that failure reporting can
happen within the checking functions instead of at the top level. This
simplifies the return value handling and allows more details and offsets
to be included in the report. Having the offset can be much more helpful
in understanding hardened usercopy bugs.

Signed-off-by: Kees Cook <keescook@chromium.org>

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This commit is contained in:

Kees Cook 2018-01-10 14:48:22 -08:00

parent b394d468e7

commit f4e6e289cb

4 changed files with 57 additions and 72 deletions

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12

include/linux/slab.h

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8

mm/slab.c

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14

mm/slub.c

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95

mm/usercopy.c

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