exec: Add do_close_execat() helper
Consolidate the calls to allow_write_access()/fput() into a single
place, since we repeat this code pattern. Add comments around the
callers for the details on it.
Link: https://lore.kernel.org/r/202209161637.9EDAF6B18@keescook
Signed-off-by:
Kees Cook <keescook@chromium.org>
parent
8788a17c
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