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I am sending the new version patch with below changes. On 5/31/2024 4:28 PM, Borislav Petkov wrote: > p type, size, offset and flag values for every xfeature that is present. > + */ > +static int dump_xsave_layout_desc(struct coredump_params *cprm) > +{ > + int num_records = 0; > + int i; > + > + for_each_extended_xfeature(i, fpu_kernel_cfg.max_features) { Modifying "fpu_kernel_cfg.max_features" to "fpu_user_cfg.max_features" Supervisor bits also set in "fpu_kernel_cfg.max_features" (https://github.com/torvalds/linux/blob/master/arch/x86/kernel/fpu/xstate.c#L777) > + struct xfeat_component xc = { > + .type = i, > + .size = xstate_sizes[i], > + .offset = xstate_offsets[i], > + /* reserved for future use */ > + .flags = 0, > + }; > + > + if (!dump_emit(cprm, &xc, sizeof(xc))) > + return 0; > + > + num_records++; > + } > + return num_records; > +} > + > +static int get_xsave_desc_size(void) > +{ > + int cnt = 0; > + int i; > + changing "int" to "u32" as per review comment. > + for_each_extended_xfeature(i, fpu_kernel_cfg.max_features) > + cnt++; > + > + return cnt * (sizeof(struct xfeat_component)); > +} > + > > + > +int elf_coredump_extra_notes_size(void) > +{ > + int size; Adding below check, same as in "elf_coredump_extra_notes_write" if (!fpu_user_cfg.max_features) return 0; thanks, vigneshbalu. > + /* .note header */ > + size = sizeof(struct elf_note); > + /* name + align */ > + size += roundup(sizeof(owner_name), 4); > + size += get_xsave_desc_size(); > + > > #define NT_S390_TIMER 0x301 /* s390 timer register */ > #define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */ > -- > 2.43.0 > > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette