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Jia-Ju Bai authored
In a previous commit 7433632c, buffer, buffer->buffers and buffer->buffers[cpu] in ring_buffer_wake_waiters() can be NULL, and thus the related checks are added. However, in the same call stack, these variables are also used in ring_buffer_free_read_page(): tracing_buffers_release() ring_buffer_wake_waiters(iter->array_buffer->buffer) cpu_buffer = buffer->buffers[cpu] -> Add checks by previous commit ring_buffer_free_read_page(iter->array_buffer->buffer) cpu_buffer = buffer->buffers[cpu] -> No check Thus, to avod possible null-pointer derefernces, the related checks should be added. These results are reported by a static tool designed by myself. Link: https://lkml.kernel.org/r/20230113125501.760324-1-baijiaju1990@gmail.comReported-by:
TOTE Robot <oslab@tsinghua.edu.cn> Signed-off-by:
Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by:
Steven Rostedt (Google) <rostedt@goodmis.org>
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