705e87c0c3
Convert those common loops using page_table_lock on the outside and pte_offset_map within to use just pte_offset_map_lock within instead. These all hold mmap_sem (some exclusively, some not), so at no level can a page table be whipped away from beneath them. But whereas pte_alloc loops tested with the "atomic" pmd_present, these loops are testing with pmd_none, which on i386 PAE tests both lower and upper halves. That's now unsafe, so add a cast into pmd_none to test only the vital lower half: we lose a little sensitivity to a corrupt middle directory, but not enough to worry about. It appears that i386 and UML were the only architectures vulnerable in this way, and pgd and pud no problem. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| .. | ||
| a.out.h | ||
| apic.h | ||
| archparam-i386.h | ||
| archparam-ppc.h | ||
| archparam-x86_64.h | ||
| atomic.h | ||
| auxvec.h | ||
| bitops.h | ||
| boot.h | ||
| bug.h | ||
| bugs.h | ||
| byteorder.h | ||
| cache.h | ||
| cacheflush.h | ||
| calling.h | ||
| checksum.h | ||
| cobalt.h | ||
| common.lds.S | ||
| cpufeature.h | ||
| cputime.h | ||
| current.h | ||
| delay.h | ||
| desc.h | ||
| div64.h | ||
| dma-mapping.h | ||
| dma.h | ||
| dwarf2.h | ||
| elf-i386.h | ||
| elf-ppc.h | ||
| elf-x86_64.h | ||
| emergency-restart.h | ||
| errno.h | ||
| fcntl.h | ||
| fixmap.h | ||
| floppy.h | ||
| futex.h | ||
| hardirq.h | ||
| highmem.h | ||
| hw_irq.h | ||
| ide.h | ||
| io.h | ||
| ioctl.h | ||
| ioctls.h | ||
| ipc.h | ||
| ipcbuf.h | ||
| irq.h | ||
| irq_vectors.h | ||
| keyboard.h | ||
| kmap_types.h | ||
| ldt.h | ||
| linkage.h | ||
| local.h | ||
| locks.h | ||
| mca_dma.h | ||
| mman.h | ||
| mmu.h | ||
| mmu_context.h | ||
| module-generic.h | ||
| module-i386.h | ||
| module-x86_64.h | ||
| msgbuf.h | ||
| mtrr.h | ||
| namei.h | ||
| page.h | ||
| page_offset.h | ||
| param.h | ||
| pci.h | ||
| pda.h | ||
| percpu.h | ||
| pgalloc.h | ||
| pgtable-2level.h | ||
| pgtable-3level.h | ||
| pgtable.h | ||
| poll.h | ||
| posix_types.h | ||
| prctl.h | ||
| processor-generic.h | ||
| processor-i386.h | ||
| processor-ppc.h | ||
| processor-x86_64.h | ||
| ptrace-generic.h | ||
| ptrace-i386.h | ||
| ptrace-x86_64.h | ||
| resource.h | ||
| rwlock.h | ||
| rwsem.h | ||
| scatterlist.h | ||
| sections.h | ||
| segment.h | ||
| semaphore.h | ||
| sembuf.h | ||
| serial.h | ||
| setup.h | ||
| shmbuf.h | ||
| shmparam.h | ||
| sigcontext-generic.h | ||
| sigcontext-i386.h | ||
| sigcontext-ppc.h | ||
| sigcontext-x86_64.h | ||
| siginfo.h | ||
| signal.h | ||
| smp.h | ||
| socket.h | ||
| sockios.h | ||
| spinlock.h | ||
| spinlock_types.h | ||
| stat.h | ||
| statfs.h | ||
| string.h | ||
| suspend.h | ||
| system-generic.h | ||
| system-i386.h | ||
| system-ppc.h | ||
| system-x86_64.h | ||
| termbits.h | ||
| termios.h | ||
| thread_info.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| topology.h | ||
| types.h | ||
| uaccess.h | ||
| ucontext.h | ||
| unaligned.h | ||
| unistd.h | ||
| user.h | ||
| vga.h | ||
| vm-flags-i386.h | ||
| vm-flags-x86_64.h | ||
| vm86.h | ||
| xor.h | ||