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authorAlexander Potapenko2022-09-15 17:03:38 +0200
committerAndrew Morton2022-10-03 14:03:18 -0700
commit888f84a6da4d17e453058169fa7b235fff34f5bf (patch)
tree9039cc7a4b704d94450849d8cc9ec9fa8787d76c /include
parent33b75c1d884e81ec97525e0a6fdcb187adf273f4 (diff)
x86: asm: instrument usercopy in get_user() and put_user()
Use hooks from instrumented.h to notify bug detection tools about usercopy events in variations of get_user() and put_user(). Link: https://lkml.kernel.org/r/20220915150417.722975-5-glider@google.com Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric Biggers <ebiggers@google.com> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Ilya Leoshkevich <iii@linux.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <keescook@chromium.org> Cc: Marco Elver <elver@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/instrumented.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/instrumented.h b/include/linux/instrumented.h
index ee8f7d17d34f..9f1dba8f717b 100644
--- a/include/linux/instrumented.h
+++ b/include/linux/instrumented.h
@@ -153,4 +153,32 @@ instrument_copy_from_user_after(const void *to, const void __user *from,
{
}
+/**
+ * instrument_get_user() - add instrumentation to get_user()-like macros
+ *
+ * get_user() and friends are fragile, so it may depend on the implementation
+ * whether the instrumentation happens before or after the data is copied from
+ * the userspace.
+ *
+ * @to destination variable, may not be address-taken
+ */
+#define instrument_get_user(to) \
+({ \
+})
+
+/**
+ * instrument_put_user() - add instrumentation to put_user()-like macros
+ *
+ * put_user() and friends are fragile, so it may depend on the implementation
+ * whether the instrumentation happens before or after the data is copied from
+ * the userspace.
+ *
+ * @from source address
+ * @ptr userspace pointer to copy to
+ * @size number of bytes to copy
+ */
+#define instrument_put_user(from, ptr, size) \
+({ \
+})
+
#endif /* _LINUX_INSTRUMENTED_H */