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Fix: lib_ring_buffer_copy_from_user_inatomic error handling
[lttng-modules.git]
/
lib
/
ringbuffer
/
backend.h
diff --git
a/lib/ringbuffer/backend.h
b/lib/ringbuffer/backend.h
index e3a0a81afb7a5b6f8bc327dce3c3847ec0a8e0b1..61b7f5394a3ed7be63f73f75c83249b7ce7f2bcb 100644
(file)
--- a/
lib/ringbuffer/backend.h
+++ b/
lib/ringbuffer/backend.h
@@
-334,8
+334,7
@@
void lib_ring_buffer_copy_from_user_inatomic(const struct lib_ring_buffer_config
rpages->p[index].virt + (offset & ~PAGE_MASK),
src, len);
if (unlikely(ret > 0)) {
rpages->p[index].virt + (offset & ~PAGE_MASK),
src, len);
if (unlikely(ret > 0)) {
- len -= (pagecpy - ret);
- offset += (pagecpy - ret);
+ /* Copy failed. */
goto fill_buffer;
}
} else {
goto fill_buffer;
}
} else {
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