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Steven Rostedt (Red Hat) authored
commit 049fb9bd upstream. 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.comReported-by:
"Qiu, PeiyangX" <peiyangx.qiu@intel.com> Fixes: a949ae56 "ftrace/module: Hardcode ftrace_module_init() call into load_module()" Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
fdc08799