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Kirill A. Shutemov ee53664bda mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support ... Sasha Levin found a NULL pointer dereference that is due to a missing page table lock, which in turn is due to the pmd entry in question being a transparent huge-table entry. The code - introduced in commit 1998cc0489 ("mm: make madvise(MADV_WILLNEED) support swap file prefetch") - correctly checks for this situation using pmd_none_or_trans_huge_or_clear_bad(), but it turns out that that function doesn't work correctly. pmd_none_or_trans_huge_or_clear_bad() expected that pmd_bad() would trigger if the transparent hugepage bit was set, but it doesn't do that if pmd_numa() is also set. Note that the NUMA bit only gets set on real NUMA machines, so people trying to reproduce this on most normal development systems would never actually trigger this. Fix it by removing the very subtle (and subtly incorrect) expectation, and instead just checking pmd_trans_huge() explicitly. Reported-by: Sasha Levin <sasha.levin@oracle.com> Acked-by: Andrea Arcangeli <aarcange@redhat.com> [ Additionally remove the now stale test for pmd_trans_huge() inside the pmd_bad() case - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		11 years ago
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bitops	bitops/find: clarify and extend documentation	11 years ago
4level-fixup.h	…
Kbuild.asm	UAPI: Set up uapi/asm/Kbuild.asm	13 years ago
atomic-long.h	…
atomic.h	asm-generic: move cmpxchg*_local defs to cmpxchg.h	12 years ago
atomic64.h	…
audit_change_attr.h	…
audit_dir_write.h	…
audit_read.h	…
audit_signal.h	…
audit_write.h	…
barrier.h	…
bitops.h	…
bitsperlong.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
bug.h	bug.h: Fix up CONFIG_BUG=n implicit function declarations.	13 years ago
bugs.h	…
cache.h	…
cacheflush.h	…
checksum.h	asm-generic headers: Allow yet more arch overrides in checksum.h	12 years ago
clkdev.h	asm-generic: Add default clkdev.h	13 years ago
cmpxchg-local.h	generic: Use raw local irq variant for generic cmpxchg	12 years ago
cmpxchg.h	asm-generic: move cmpxchg*_local defs to cmpxchg.h	12 years ago
cputime.h	cputime: Generic on-demand virtual cputime accounting	12 years ago
cputime_jiffies.h	cputime: Move default nsecs_to_cputime() to jiffies based cputime file	12 years ago
cputime_nsecs.h	cputime_nsecs: use math64.h for nsec resolution conversion helpers	12 years ago
current.h	…
delay.h	…
device.h	…
div64.h	…
dma-coherent.h	common: dma-mapping: add support for generic dma_mmap_* calls	13 years ago
dma-mapping-broken.h	asm-generic/dma-mapping-broken.h: Provide dma_alloc_attrs()/dma_free_attrs()	12 years ago
dma-mapping-common.h	common: dma-mapping: introduce dma_get_sgtable() function	13 years ago
dma.h	…
emergency-restart.h	…
exec.h	…
fb.h	…
ftrace.h	…
futex.h	…
getorder.h	…
gpio.h	GPIO bulk changes for the v3.13 development cycle	11 years ago
hardirq.h	…
hugetlb.h	mm: Fix generic hugetlb pte check return type.	12 years ago
hw_irq.h	…
ide_iops.h	…
int-l64.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
int-ll64.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
io-64-nonatomic-hi-lo.h	…
io-64-nonatomic-lo-hi.h	…
io.h	kernel: Fix s390 absolute memory access for /dev/mem	12 years ago
ioctl.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
iomap.h	…
irq.h	…
irq_regs.h	…
irqflags.h	…
kdebug.h	…
kmap_types.h	asm-generic: remove km_type definitions	13 years ago
kvm_para.h	KVM: add kvm_para_available to asm-generic/kvm_para.h	12 years ago
libata-portmap.h	…
linkage.h	…
local.h	…
local64.h	…
memory_model.h	__page_to_pfn: Fix typo in comment	11 years ago
mm_hooks.h	…
mmu.h	asm-generic/mmu.h: Add support for FDPIC	12 years ago
mmu_context.h	…
module.h	Make most arch asm/module.h files use asm-generic/module.h	13 years ago
mutex-dec.h	arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not	12 years ago
mutex-null.h	arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not	12 years ago
mutex-xchg.h	arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not	12 years ago
mutex.h	…
page.h	…
param.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
parport.h	include: remove __dev* attributes.	12 years ago
pci-bridge.h	…
pci-dma-compat.h	…
pci.h	…
pci_iomap.h	…
percpu.h	…
pgalloc.h	…
pgtable-nopmd.h	…
pgtable-nopud.h	…
pgtable.h	mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support	11 years ago
preempt.h	sched: Remove PREEMPT_NEED_RESCHED from generic code	11 years ago
ptrace.h	…
resource.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
rtc.h	…
rwsem.h	…
scatterlist.h	…
sections.h	vmlinux.lds: add comments for global variables and clean up useless declarations	12 years ago
segment.h	…
serial.h	…
siginfo.h	constify copy_siginfo_to_user{,32}()	11 years ago
signal.h	unify default ptrace_signal_deliver	12 years ago
simd.h	crypto: create generic version of ablk_helper	12 years ago
sizes.h	ARM: 7430/1: sizes.h: move from asm-generic to <linux/sizes.h>	13 years ago
spinlock.h	…
statfs.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
string.h	…
switch_to.h	…
syscall.h	…
syscalls.h	burying unused conditionals	12 years ago
termios-base.h	…
termios.h	UAPI: (Scripted) Disintegrate include/asm-generic	13 years ago
timex.h	…
tlb.h	Fix TLB gather virtual address range invalidation corner cases	12 years ago
tlbflush.h	…
topology.h	…
trace_clock.h	tracing,x86: Add a TSC trace_clock	12 years ago
uaccess-unaligned.h	…
uaccess.h	asm-generic: uaccess s/might_sleep/might_fault/	12 years ago
unaligned.h	…
unistd.h	We get rid of the general module prefix confusion with a binary config option,	12 years ago
user.h	…
vga.h	…
vmlinux.lds.h	kernel: add support for init_array constructors	11 years ago
vtime.h	include/asm-generic/vtime.h: avoid zero-length file	12 years ago
word-at-a-time.h	word-at-a-time: provide generic big-endian zero_bytemask implementation	11 years ago
xor.h	asm-generic: xor: mark static functions as __maybe_unused	13 years ago