sh: Fix access to released memory in dwarf_unwinder_cleanup()

Signed-off-by: Marek Skuczynski <mareksk7@gmail.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index 3576b70..88d28ec 100644 (file)
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -892,18 +892,18 @@ static struct unwinder dwarf_unwinder = {
 
 static void dwarf_unwinder_cleanup(void)
 {
-       struct dwarf_cie *cie;
-       struct dwarf_fde *fde;
+       struct dwarf_cie *cie, *cie_tmp;
+       struct dwarf_fde *fde, *fde_tmp;
 
        /*
         * Deallocate all the memory allocated for the DWARF unwinder.
         * Traverse all the FDE/CIE lists and remove and free all the
         * memory associated with those data structures.
         */
-       list_for_each_entry(cie, &dwarf_cie_list, link)
+       list_for_each_entry_safe(cie, cie_tmp, &dwarf_cie_list, link)
                kfree(cie);
 
-       list_for_each_entry(fde, &dwarf_fde_list, link)
+       list_for_each_entry_safe(fde, fde_tmp, &dwarf_fde_list, link)
                kfree(fde);
 
        kmem_cache_destroy(dwarf_reg_cachep);