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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2016-01-06 04:32:47 +0300 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-01-07 20:17:39 +0300 |
| commit | 049fb9bd416077b3622d317a45796be4f2431df3 (patch) | |
| tree | 407e360324e0370e8a4e73e15de76959e6ea1f24 /kernel/jump_label.c | |
| parent | f36d1be2930ede0a1947686e1126ffda5d5ee1bb (diff) | |
| download | linux-049fb9bd416077b3622d317a45796be4f2431df3.tar.xz | |
ftrace/module: Call clean up function when module init fails early
If the module init code fails after calling ftrace_module_init() and before
calling do_init_module(), we can suffer from a memory leak. This is because
ftrace_module_init() allocates pages to store the locations that ftrace
hooks are placed in the module text. If do_init_module() fails, it still
calls the MODULE_GOING notifiers which will tell ftrace to do a clean up of
the pages it allocated for the module. But if load_module() fails before
then, the pages allocated by ftrace_module_init() will never be freed.
Call ftrace_release_mod() on the module if load_module() fails before
getting to do_init_module().
Link: http://lkml.kernel.org/r/567CEA31.1070507@intel.com
Reported-by: "Qiu, PeiyangX" <peiyangx.qiu@intel.com>
Fixes: a949ae560a511 "ftrace/module: Hardcode ftrace_module_init() call into load_module()"
Cc: stable@vger.kernel.org # v2.6.38+
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/jump_label.c')
0 files changed, 0 insertions, 0 deletions