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| Filename | Latest commit message | Latest commit date |
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c41d68a513
compat_alloc_user_space() expects the caller to independently call access_ok() to verify the returned area. A missing call could introduce problems on some architectures. This patch incorporates the access_ok() check into compat_alloc_user_space() and also adds a sanity check on the length. The existing compat_alloc_user_space() implementations are renamed arch_compat_alloc_user_space() and are used as part of the implementation of the new global function. This patch assumes NULL will cause __get_user()/__put_user() to either fail or access userspace on all architectures. This should be followed by checking the return value of compat_access_user_space() for NULL in the callers, at which time the access_ok() in the callers can also be removed. Reported-by: Ben Hawkes <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Acked-by: Benjamin Herrenschmidt <[email protected]> Acked-by: Chris Metcalf <[email protected]> Acked-by: David S. Miller <[email protected]> Acked-by: Ingo Molnar <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Acked-by: Tony Luck <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Helge Deller <[email protected]> Cc: James Bottomley <[email protected]> Cc: Kyle McMartin <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: <[email protected]> |
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