Re: [PATCH ftrace/core 1/2] [BUGFIX] ftrace: Avoid panic when allocation of max_buffer is failed

[Steven Rostedt]

As your change log and subject make the bug sound much worse than it
is, I re-wrote both. Here's the new version:

Subject: [PATCH ftrace/core 1/2] [BUGFIX] tracing: Eliminate double free on failure of allocation on boot up

If allocation of the max_buffer fails on boot up, the error path will
free both per_cpu data structures from the buffers. With the new redesign
of the code, those structures are freed if allocations failed. That is,
the helper function that allocates the buffers will free the per cpu data
on failure. No need to do it again. In fact, the second free will cause
a bug as the code can not handle a double free.

Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@xxxxxxxxxxx>
---


-- Steve
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/