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| author | Peter Zijlstra <peterz@infradead.org> | 2019-04-03 09:39:48 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-03 11:02:19 +0200 |
| commit | e74deb11931ff682b59d5b9d387f7115f689698e (patch) | |
| tree | 6d9698ce16b48c95ecff5ca40f8b2701941b9583 /include/linux/uaccess.h | |
| parent | 88e4718275c1bddca6f61f300688b4553dc8584b (diff) | |
| download | linux-e74deb11931ff682b59d5b9d387f7115f689698e.tar.gz linux-e74deb11931ff682b59d5b9d387f7115f689698e.tar.bz2 linux-e74deb11931ff682b59d5b9d387f7115f689698e.zip | |
x86/uaccess: Introduce user_access_{save,restore}()
Introduce common helpers for when we need to safely suspend a
uaccess section; for instance to generate a {KA,UB}SAN report.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/uaccess.h')
| -rw-r--r-- | include/linux/uaccess.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 37b226e8df13..2b70130af585 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -268,6 +268,8 @@ extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count); #define user_access_end() do { } while (0) #define unsafe_get_user(x, ptr, err) do { if (unlikely(__get_user(x, ptr))) goto err; } while (0) #define unsafe_put_user(x, ptr, err) do { if (unlikely(__put_user(x, ptr))) goto err; } while (0) +static inline unsigned long user_access_save(void) { return 0UL; } +static inline void user_access_restore(unsigned long flags) { } #endif #ifdef CONFIG_HARDENED_USERCOPY |