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ia64:unwind: fix double free for mod->arch.init_unw_table
The function free_module in file kernel/module.c as follow: void free_module(struct module *mod) { ...... module_arch_cleanup(mod); ...... module_arch_freeing_init(mod); ...... } Both module_arch_cleanup and module_arch_freeing_init function would free the mod->arch.init_unw_table, which cause double free. Here, set mod->arch.init_unw_table = NULL after remove the unwind table to avoid double free. Signed-off-by: chenzefeng <chenzefeng2@huawei.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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1 changed files with 6 additions and 2 deletions
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@ -914,10 +914,14 @@ module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mo
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void
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module_arch_cleanup (struct module *mod)
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{
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if (mod->arch.init_unw_table)
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if (mod->arch.init_unw_table) {
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unw_remove_unwind_table(mod->arch.init_unw_table);
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if (mod->arch.core_unw_table)
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mod->arch.init_unw_table = NULL;
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}
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if (mod->arch.core_unw_table) {
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unw_remove_unwind_table(mod->arch.core_unw_table);
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mod->arch.core_unw_table = NULL;
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}
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}
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void *dereference_module_function_descriptor(struct module *mod, void *ptr)
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