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-rw-r--r--linux-2.6-i386-nx-emulation.patch628
1 files changed, 628 insertions, 0 deletions
diff --git a/linux-2.6-i386-nx-emulation.patch b/linux-2.6-i386-nx-emulation.patch
new file mode 100644
index 000000000..a47e99d47
--- /dev/null
+++ b/linux-2.6-i386-nx-emulation.patch
@@ -0,0 +1,628 @@
+--- a/arch/x86/include/asm/desc.h
++++ b/arch/x86/include/asm/desc.h
+@@ -5,6 +5,7 @@
+ #include <asm/ldt.h>
+ #include <asm/mmu.h>
+ #include <linux/smp.h>
++#include <linux/mm_types.h>
+
+ static inline void fill_ldt(struct desc_struct *desc,
+ const struct user_desc *info)
+@@ -93,6 +94,9 @@ static inline int desc_empty(const void *ptr)
+
+ #define load_TLS(t, cpu) native_load_tls(t, cpu)
+ #define set_ldt native_set_ldt
++#ifdef CONFIG_X86_32
++#define load_user_cs_desc native_load_user_cs_desc
++#endif /*CONFIG_X86_32*/
+
+ #define write_ldt_entry(dt, entry, desc) \
+ native_write_ldt_entry(dt, entry, desc)
+@@ -392,4 +396,25 @@ static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
+ _set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+ }
+
++#ifdef CONFIG_X86_32
++static inline void set_user_cs(struct desc_struct *desc, unsigned long limit)
++{
++ limit = (limit - 1) / PAGE_SIZE;
++ desc->a = limit & 0xffff;
++ desc->b = (limit & 0xf0000) | 0x00c0fb00;
++}
++
++static inline void native_load_user_cs_desc(int cpu, struct mm_struct *mm)
++{
++ get_cpu_gdt_table(cpu)[GDT_ENTRY_DEFAULT_USER_CS] = (mm)->context.user_cs;
++}
++
++#define arch_add_exec_range arch_add_exec_range
++#define arch_remove_exec_range arch_remove_exec_range
++#define arch_flush_exec_range arch_flush_exec_range
++extern void arch_add_exec_range(struct mm_struct *mm, unsigned long limit);
++extern void arch_remove_exec_range(struct mm_struct *mm, unsigned long limit);
++extern void arch_flush_exec_range(struct mm_struct *mm);
++#endif /* CONFIG_X86_32 */
++
+ #endif /* _ASM_X86_DESC_H */
+--- a/arch/x86/include/asm/mmu.h
++++ b/arch/x86/include/asm/mmu.h
+@@ -7,12 +7,19 @@
+ /*
+ * The x86 doesn't have a mmu context, but
+ * we put the segment information here.
++ *
++ * exec_limit is used to track the range PROT_EXEC
++ * mappings span.
+ */
+ typedef struct {
+ void *ldt;
+ int size;
+ struct mutex lock;
+ void *vdso;
++#ifdef CONFIG_X86_32
++ struct desc_struct user_cs;
++ unsigned long exec_limit;
++#endif
+ } mm_context_t;
+
+ #ifdef CONFIG_SMP
+--- a/arch/x86/include/asm/paravirt.h
++++ b/arch/x86/include/asm/paravirt.h
+@@ -289,6 +289,12 @@ static inline void set_ldt(const void *addr, unsigned entries)
+ {
+ PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
+ }
++#ifdef CONFIG_X86_32
++static inline void load_user_cs_desc(unsigned int cpu, struct mm_struct *mm)
++{
++ PVOP_VCALL2(pv_cpu_ops.load_user_cs_desc, cpu, mm);
++}
++#endif /*CONFIG_X86_32*/
+ static inline void store_gdt(struct desc_ptr *dtr)
+ {
+ PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
+--- a/arch/x86/include/asm/paravirt_types.h
++++ b/arch/x86/include/asm/paravirt_types.h
+@@ -118,6 +118,9 @@ struct pv_cpu_ops {
+ void (*store_gdt)(struct desc_ptr *);
+ void (*store_idt)(struct desc_ptr *);
+ void (*set_ldt)(const void *desc, unsigned entries);
++#ifdef CONFIG_X86_32
++ void (*load_user_cs_desc)(int cpu, struct mm_struct *mm);
++#endif
+ unsigned long (*store_tr)(void);
+ void (*load_tls)(struct thread_struct *t, unsigned int cpu);
+ #ifdef CONFIG_X86_64
+--- a/arch/x86/kernel/cpu/common.c
++++ b/arch/x86/kernel/cpu/common.c
+@@ -802,6 +802,22 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+ /* Filter out anything that depends on CPUID levels we don't have */
+ filter_cpuid_features(c, true);
+
++#ifdef CONFIG_X86_32
++ /*
++ * emulation of NX with segment limits unfortunately means
++ * we have to disable the fast system calls, due to the way that
++ * sysexit clears the segment limits on return.
++ * If we have either disabled exec-shield on the boot command line,
++ * or we have NX, then we don't need to do this.
++ */
++ if (exec_shield != 0) {
++#ifdef CONFIG_X86_PAE
++ if (!test_cpu_cap(c, X86_FEATURE_NX))
++#endif
++ clear_cpu_cap(c, X86_FEATURE_SEP);
++ }
++#endif
++
+ /* If the model name is still unset, do table lookup. */
+ if (!c->x86_model_id[0]) {
+ const char *p;
+--- a/arch/x86/kernel/paravirt.c
++++ b/arch/x86/kernel/paravirt.c
+@@ -345,6 +345,9 @@ struct pv_cpu_ops pv_cpu_ops = {
+ .read_tscp = native_read_tscp,
+ .load_tr_desc = native_load_tr_desc,
+ .set_ldt = native_set_ldt,
++#ifdef CONFIG_X86_32
++ .load_user_cs_desc = native_load_user_cs_desc,
++#endif /*CONFIG_X86_32*/
+ .load_gdt = native_load_gdt,
+ .load_idt = native_load_idt,
+ .store_gdt = native_store_gdt,
+--- a/arch/x86/kernel/process_32.c
++++ b/arch/x86/kernel/process_32.c
+@@ -243,7 +243,10 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
+ void
+ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+ {
++ int cpu;
++
+ set_user_gs(regs, 0);
++
+ regs->fs = 0;
+ set_fs(USER_DS);
+ regs->ds = __USER_DS;
+@@ -252,6 +255,11 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+ regs->cs = __USER_CS;
+ regs->ip = new_ip;
+ regs->sp = new_sp;
++
++ cpu = get_cpu();
++ load_user_cs_desc(cpu, current->mm);
++ put_cpu();
++
+ /*
+ * Free the old FP and other extended state
+ */
+@@ -311,6 +319,9 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+ if (preload_fpu)
+ prefetch(next->fpu.state);
+
++ if (next_p->mm)
++ load_user_cs_desc(cpu, next_p->mm);
++
+ /*
+ * Reload esp0.
+ */
+@@ -404,3 +415,40 @@ unsigned long get_wchan(struct task_struct *p)
+ return 0;
+ }
+
++static void modify_cs(struct mm_struct *mm, unsigned long limit)
++{
++ mm->context.exec_limit = limit;
++ set_user_cs(&mm->context.user_cs, limit);
++ if (mm == current->mm) {
++ int cpu;
++
++ cpu = get_cpu();
++ load_user_cs_desc(cpu, mm);
++ put_cpu();
++ }
++}
++
++void arch_add_exec_range(struct mm_struct *mm, unsigned long limit)
++{
++ if (limit > mm->context.exec_limit)
++ modify_cs(mm, limit);
++}
++
++void arch_remove_exec_range(struct mm_struct *mm, unsigned long old_end)
++{
++ struct vm_area_struct *vma;
++ unsigned long limit = PAGE_SIZE;
++
++ if (old_end == mm->context.exec_limit) {
++ for (vma = mm->mmap; vma; vma = vma->vm_next)
++ if ((vma->vm_flags & VM_EXEC) && (vma->vm_end > limit))
++ limit = vma->vm_end;
++ modify_cs(mm, limit);
++ }
++}
++
++void arch_flush_exec_range(struct mm_struct *mm)
++{
++ mm->context.exec_limit = 0;
++ set_user_cs(&mm->context.user_cs, 0);
++}
+--- a/arch/x86/kernel/traps.c
++++ b/arch/x86/kernel/traps.c
+@@ -109,6 +109,78 @@ static inline void preempt_conditional_cli(struct pt_regs *regs)
+ dec_preempt_count();
+ }
+
++#ifdef CONFIG_X86_32
++static inline int
++__compare_user_cs_desc(const struct desc_struct *desc1,
++ const struct desc_struct *desc2)
++{
++ return ((desc1->limit0 != desc2->limit0) ||
++ (desc1->limit != desc2->limit) ||
++ (desc1->base0 != desc2->base0) ||
++ (desc1->base1 != desc2->base1) ||
++ (desc1->base2 != desc2->base2));
++}
++
++/*
++ * lazy-check for CS validity on exec-shield binaries:
++ *
++ * the original non-exec stack patch was written by
++ * Solar Designer <solar at openwall.com>. Thanks!
++ */
++static int
++check_lazy_exec_limit(int cpu, struct pt_regs *regs, long error_code)
++{
++ struct desc_struct *desc1, *desc2;
++ struct vm_area_struct *vma;
++ unsigned long limit;
++
++ if (current->mm == NULL)
++ return 0;
++
++ limit = -1UL;
++ if (current->mm->context.exec_limit != -1UL) {
++ limit = PAGE_SIZE;
++ spin_lock(&current->mm->page_table_lock);
++ for (vma = current->mm->mmap; vma; vma = vma->vm_next)
++ if ((vma->vm_flags & VM_EXEC) && (vma->vm_end > limit))
++ limit = vma->vm_end;
++ vma = get_gate_vma(current);
++ if (vma && (vma->vm_flags & VM_EXEC) && (vma->vm_end > limit))
++ limit = vma->vm_end;
++ spin_unlock(&current->mm->page_table_lock);
++ if (limit >= TASK_SIZE)
++ limit = -1UL;
++ current->mm->context.exec_limit = limit;
++ }
++ set_user_cs(&current->mm->context.user_cs, limit);
++
++ desc1 = &current->mm->context.user_cs;
++ desc2 = get_cpu_gdt_table(cpu) + GDT_ENTRY_DEFAULT_USER_CS;
++
++ if (__compare_user_cs_desc(desc1, desc2)) {
++ /*
++ * The CS was not in sync - reload it and retry the
++ * instruction. If the instruction still faults then
++ * we won't hit this branch next time around.
++ */
++ if (print_fatal_signals >= 2) {
++ printk(KERN_ERR "#GPF fixup (%ld[seg:%lx]) at %08lx, CPU#%d.\n",
++ error_code, error_code/8, regs->ip,
++ smp_processor_id());
++ printk(KERN_ERR "exec_limit: %08lx, user_cs: %08x/%08x, CPU_cs: %08x/%08x.\n",
++ current->mm->context.exec_limit,
++ desc1->a, desc1->b, desc2->a, desc2->b);
++ }
++
++ load_user_cs_desc(cpu, current->mm);
++
++ return 1;
++ }
++
++ return 0;
++}
++#endif
++
+ static void __kprobes
+ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
+ long error_code, siginfo_t *info)
+@@ -265,6 +337,29 @@ do_general_protection(struct pt_regs *regs, long error_code)
+ if (!user_mode(regs))
+ goto gp_in_kernel;
+
++#ifdef CONFIG_X86_32
++{
++ int cpu;
++ int ok;
++
++ cpu = get_cpu();
++ ok = check_lazy_exec_limit(cpu, regs, error_code);
++ put_cpu();
++
++ if (ok)
++ return;
++
++ if (print_fatal_signals) {
++ printk(KERN_ERR "#GPF(%ld[seg:%lx]) at %08lx, CPU#%d.\n",
++ error_code, error_code/8, regs->ip, smp_processor_id());
++ printk(KERN_ERR "exec_limit: %08lx, user_cs: %08x/%08x.\n",
++ current->mm->context.exec_limit,
++ current->mm->context.user_cs.a,
++ current->mm->context.user_cs.b);
++ }
++}
++#endif /*CONFIG_X86_32*/
++
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = 13;
+
+@@ -792,19 +887,37 @@ do_device_not_available(struct pt_regs *regs, long error_code)
+ }
+
+ #ifdef CONFIG_X86_32
++/*
++ * The fixup code for errors in iret jumps to here (iret_exc). It loses
++ * the original trap number and erorr code. The bogus trap 32 and error
++ * code 0 are what the vanilla kernel delivers via:
++ * DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
++ *
++ * NOTE: Because of the final "1" in the macro we need to enable interrupts.
++ *
++ * In case of a general protection fault in the iret instruction, we
++ * need to check for a lazy CS update for exec-shield.
++ */
+ dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
+ {
+- siginfo_t info;
++ int ok;
++ int cpu;
++
+ local_irq_enable();
+
+- info.si_signo = SIGILL;
+- info.si_errno = 0;
+- info.si_code = ILL_BADSTK;
+- info.si_addr = NULL;
+- if (notify_die(DIE_TRAP, "iret exception",
+- regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+- return;
+- do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
++ cpu = get_cpu();
++ ok = check_lazy_exec_limit(cpu, regs, error_code);
++ put_cpu();
++
++ if (!ok && notify_die(DIE_TRAP, "iret exception", regs,
++ error_code, 32, SIGSEGV) != NOTIFY_STOP) {
++ siginfo_t info;
++ info.si_signo = SIGSEGV;
++ info.si_errno = 0;
++ info.si_code = ILL_BADSTK;
++ info.si_addr = 0;
++ do_trap(32, SIGSEGV, "iret exception", regs, error_code, &info);
++ }
+ }
+ #endif
+
+--- a/arch/x86/mm/setup_nx.c
++++ b/arch/x86/mm/setup_nx.c
+@@ -1,3 +1,4 @@
++#include <linux/sched.h>
+ #include <linux/spinlock.h>
+ #include <linux/errno.h>
+ #include <linux/init.h>
+@@ -23,6 +24,7 @@ static int __init noexec_setup(char *str)
+ disable_nx = 0;
+ } else if (!strncmp(str, "off", 3)) {
+ disable_nx = 1;
++ exec_shield = 0;
+ }
+ x86_configure_nx();
+ return 0;
+@@ -40,6 +42,10 @@ void __cpuinit x86_configure_nx(void)
+ void __init x86_report_nx(void)
+ {
+ if (!cpu_has_nx) {
++ if (exec_shield)
++ printk(KERN_INFO "Using x86 segment limits to approximate NX protection\n");
++ else
++
+ printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
+ "missing in CPU or disabled in BIOS!\n");
+ } else {
+--- a/arch/x86/mm/tlb.c
++++ b/arch/x86/mm/tlb.c
+@@ -6,6 +6,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/module.h>
+
++#include <asm/desc.h>
+ #include <asm/tlbflush.h>
+ #include <asm/mmu_context.h>
+ #include <asm/cache.h>
+@@ -131,6 +132,12 @@ void smp_invalidate_interrupt(struct pt_regs *regs)
+ union smp_flush_state *f;
+
+ cpu = smp_processor_id();
++
++#ifdef CONFIG_X86_32
++ if (current->active_mm)
++ load_user_cs_desc(cpu, current->active_mm);
++#endif
++
+ /*
+ * orig_rax contains the negated interrupt vector.
+ * Use that to determine where the sender put the data.
+--- a/arch/x86/xen/enlighten.c
++++ b/arch/x86/xen/enlighten.c
+@@ -335,6 +335,24 @@ static void xen_set_ldt(const void *addr, unsigned entries)
+ xen_mc_issue(PARAVIRT_LAZY_CPU);
+ }
+
++#ifdef CONFIG_X86_32
++static void xen_load_user_cs_desc(int cpu, struct mm_struct *mm)
++{
++ void *gdt;
++ xmaddr_t mgdt;
++ u64 descriptor;
++ struct desc_struct user_cs;
++
++ gdt = &get_cpu_gdt_table(cpu)[GDT_ENTRY_DEFAULT_USER_CS];
++ mgdt = virt_to_machine(gdt);
++
++ user_cs = mm->context.user_cs;
++ descriptor = (u64) user_cs.a | ((u64) user_cs.b) << 32;
++
++ HYPERVISOR_update_descriptor(mgdt.maddr, descriptor);
++}
++#endif /*CONFIG_X86_32*/
++
+ static void xen_load_gdt(const struct desc_ptr *dtr)
+ {
+ unsigned long va = dtr->address;
+@@ -961,6 +979,9 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
+
+ .load_tr_desc = paravirt_nop,
+ .set_ldt = xen_set_ldt,
++#ifdef CONFIG_X86_32
++ .load_user_cs_desc = xen_load_user_cs_desc,
++#endif /*CONFIG_X86_32*/
+ .load_gdt = xen_load_gdt,
+ .load_idt = xen_load_idt,
+ .load_tls = xen_load_tls,
+--- a/fs/binfmt_elf.c
++++ b/fs/binfmt_elf.c
+@@ -717,6 +722,15 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+ if (retval)
+ goto out_free_dentry;
+
++#ifdef CONFIG_X86_32
++ /*
++ * Turn off the CS limit completely if exec-shield disabled or
++ * NX active:
++ */
++ if (!exec_shield || executable_stack != EXSTACK_DISABLE_X || (__supported_pte_mask & _PAGE_NX))
++ arch_add_exec_range(current->mm, -1);
++#endif
++
+ /* OK, This is the point of no return */
+ current->flags &= ~PF_FORKNOEXEC;
+ current->mm->def_flags = def_flags;
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -101,6 +101,9 @@ struct bio_list;
+ struct fs_struct;
+ struct perf_event_context;
+
++extern int exec_shield;
++extern int print_fatal_signals;
++
+ /*
+ * List of flags we want to share for kernel threads,
+ * if only because they are not used by them anyway.
+--- a/kernel/sysctl.c
++++ b/kernel/sysctl.c
+@@ -101,6 +101,17 @@ extern int sysctl_nr_open_min, sysctl_nr_open_max;
+ #ifndef CONFIG_MMU
+ extern int sysctl_nr_trim_pages;
+ #endif
++
++int exec_shield = 1;
++
++static int __init setup_exec_shield(char *str)
++{
++ get_option(&str, &exec_shield);
++
++ return 1;
++}
++__setup("exec-shield=", setup_exec_shield);
++
+ #ifdef CONFIG_BLOCK
+ extern int blk_iopoll_enabled;
+ #endif
+@@ -428,6 +448,16 @@ static struct ctl_table kern_table[] = {
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
++#ifdef CONFIG_X86_32
++ {
++ .procname = "exec-shield",
++ .data = &exec_shield,
++ .maxlen = sizeof(int),
++ .mode = 0644,
++ .proc_handler = &proc_dointvec,
++ },
++#endif
++
+ #ifdef CONFIG_PROC_SYSCTL
+ {
+ .procname = "tainted",
+--- b/mm/mmap.c
++++ b/mm/mmap.c
+@@ -44,6 +45,18 @@
+ #define arch_rebalance_pgtables(addr, len) (addr)
+ #endif
+
++/* No sane architecture will #define these to anything else */
++#ifndef arch_add_exec_range
++#define arch_add_exec_range(mm, limit) do { ; } while (0)
++#endif
++#ifndef arch_flush_exec_range
++#define arch_flush_exec_range(mm) do { ; } while (0)
++#endif
++#ifndef arch_remove_exec_range
++#define arch_remove_exec_range(mm, limit) do { ; } while (0)
++#endif
++
++
+ static void unmap_region(struct mm_struct *mm,
+ struct vm_area_struct *vma, struct vm_area_struct *prev,
+ unsigned long start, unsigned long end);
+@@ -388,6 +401,8 @@
+ __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct rb_node *rb_parent)
+ {
++ if (vma->vm_flags & VM_EXEC)
++ arch_add_exec_range(mm, vma->vm_end);
+ if (prev) {
+ vma->vm_next = prev->vm_next;
+ prev->vm_next = vma;
+@@ -489,6 +504,8 @@
+ rb_erase(&vma->vm_rb, &mm->mm_rb);
+ if (mm->mmap_cache == vma)
+ mm->mmap_cache = prev;
++ if (vma->vm_flags & VM_EXEC)
++ arch_remove_exec_range(mm, vma->vm_end);
+ }
+
+ /*
+@@ -790,6 +807,8 @@
+ } else /* cases 2, 5, 7 */
+ err = vma_adjust(prev, prev->vm_start,
+ end, prev->vm_pgoff, NULL);
++ if (prev->vm_flags & VM_EXEC)
++ arch_add_exec_range(mm, prev->vm_end);
+ if (err)
+ return NULL;
+ return prev;
+@@ -1966,10 +2075,14 @@
+ if (new->vm_ops && new->vm_ops->open)
+ new->vm_ops->open(new);
+
+- if (new_below)
++ if (new_below) {
++ unsigned long old_end = vma->vm_end;
++
+ err = vma_adjust(vma, addr, vma->vm_end, vma->vm_pgoff +
+ ((addr - new->vm_start) >> PAGE_SHIFT), new);
+- else
++ if (vma->vm_flags & VM_EXEC)
++ arch_remove_exec_range(mm, old_end);
++ } else
+ err = vma_adjust(vma, vma->vm_start, addr, vma->vm_pgoff, new);
+
+ /* Success. */
+@@ -2254,6 +2367,7 @@
+
+ free_pgtables(tlb, vma, FIRST_USER_ADDRESS, 0);
+ tlb_finish_mmu(tlb, 0, end);
++ arch_flush_exec_range(mm);
+
+ /*
+ * Walk the list again, actually closing and freeing it,
+--- a/mm/mprotect.c
++++ b/mm/mprotect.c
+@@ -25,9 +25,14 @@
+ #include <linux/perf_event.h>
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
++#include <asm/pgalloc.h>
+ #include <asm/cacheflush.h>
+ #include <asm/tlbflush.h>
+
++#ifndef arch_remove_exec_range
++#define arch_remove_exec_range(mm, limit) do { ; } while (0)
++#endif
++
+ #ifndef pgprot_modify
+ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
+ {
+@@ -138,7 +143,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
+ struct mm_struct *mm = vma->vm_mm;
+ unsigned long oldflags = vma->vm_flags;
+ long nrpages = (end - start) >> PAGE_SHIFT;
+- unsigned long charged = 0;
++ unsigned long charged = 0, old_end = vma->vm_end;
+ pgoff_t pgoff;
+ int error;
+ int dirty_accountable = 0;
+@@ -203,6 +208,9 @@ success:
+ dirty_accountable = 1;
+ }
+
++ if (oldflags & VM_EXEC)
++ arch_remove_exec_range(current->mm, old_end);
++
+ mmu_notifier_invalidate_range_start(mm, start, end);
+ if (is_vm_hugetlb_page(vma))
+ hugetlb_change_protection(vma, start, end, vma->vm_page_prot);
generated by cgit (git 2.34.1) at 2024-05-24 20:51:41 +0000