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Fix: lib_ring_buffer_copy_from_user_inatomic error handling
[lttng-modules.git]
/
lib
/
ringbuffer
/
ring_buffer_backend.c
diff --git
a/lib/ringbuffer/ring_buffer_backend.c
b/lib/ringbuffer/ring_buffer_backend.c
index 3cc22d77b2d9ad5c2ed428fed783b9055a5f97d3..5417648af78c446637623dcf5d0e4a9e446d6d42 100644
(file)
--- a/
lib/ringbuffer/ring_buffer_backend.c
+++ b/
lib/ringbuffer/ring_buffer_backend.c
@@
-692,8
+692,7
@@
void _lib_ring_buffer_copy_from_user_inatomic(struct lib_ring_buffer_backend *bu
+ (offset & ~PAGE_MASK),
src, pagecpy) != 0;
if (ret > 0) {
- offset += (pagecpy - ret);
- len -= (pagecpy - ret);
+ /* Copy failed. */
_lib_ring_buffer_memset(bufb, offset, 0, len, 0);
break; /* stop copy */
}
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