diff options
| 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 /arch/x86/include/asm/uaccess.h | |
| parent | 88e4718275c1bddca6f61f300688b4553dc8584b (diff) | |
| download | linux-e74deb11931ff682b59d5b9d387f7115f689698e.tar.bz2 | |
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 'arch/x86/include/asm/uaccess.h')
| -rw-r--r-- | arch/x86/include/asm/uaccess.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index ae5783b5fab0..5ca7b91faf67 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -715,6 +715,9 @@ static __must_check __always_inline bool user_access_begin(const void __user *pt #define user_access_begin(a,b) user_access_begin(a,b) #define user_access_end() __uaccess_end() +#define user_access_save() smap_save() +#define user_access_restore(x) smap_restore(x) + #define unsafe_put_user(x, ptr, label) \ __put_user_size((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)), label) |