Hello Mathieu Desnoyers,
This is a semi-automatic email about new static checker warnings.
The patch c844b2f5cfea: "lttng lib: ring buffer" from Nov 28, 2011,
leads to the following Smatch complaint:
drivers/staging/lttng/lib/ringbuffer/ring_buffer_mmap.c +86
lib_ring_buffer_mmap_buf()
warn: variable dereferenced before check 'buf' (see line 79)
drivers/staging/lttng/lib/ringbuffer/ring_buffer_mmap.c
78 unsigned long length = vma->vm_end - vma->vm_start;
79 struct channel *chan = buf->backend.chan;
^^^^^^^^^^^^^^^^^
Dereference.
80 const struct lib_ring_buffer_config *config =
chan->backend.config;
81 unsigned long mmap_buf_len;
82
83 if (config->output != RING_BUFFER_MMAP)
84 return -EINVAL;
85
86 if (!buf)
^^^^
Check.
87 return -EBADF;
88
regards,
dan carpenter
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