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Commit 3164a3cb authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Martin Schwidefsky
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[S390] kprobes: add parameter check to module_free() 



When unregistering kprobes, kprobes calls module_free() and
always passes NULL for the mod parameter.  Add a check to
prevent NULL pointer dereferences.

See commit 740a8de0 for more details.

Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent c2f0e8c8

arch/s390/kernel/module.c

+4 −2
Original line number Diff line number Diff line
@@ -55,8 +55,10 @@ void *module_alloc(unsigned long size) 
/* Free memory returned from module_alloc */

void module_free(struct module *mod, void *module_region)

{

	if (mod) {

		vfree(mod->arch.syminfo);

		mod->arch.syminfo = NULL;

	}

	vfree(module_region);

}