Dave Hansen 1de14c3c5c x86-32: Fix possible incomplete TLB invalidate with PAE pagetables ... This patch attempts to fix: https://bugzilla.kernel.org/show_bug.cgi?id=56461 The symptom is a crash and messages like this: chrome: Corrupted page table at address 34a03000 *pdpt = 0000000000000000 *pde = 0000000000000000 Bad pagetable: 000f [#1] PREEMPT SMP Ingo guesses this got introduced by commit 611ae8e3f5 ("x86/tlb: enable tlb flush range support for x86") since that code started to free unused pagetables. On x86-32 PAE kernels, that new code has the potential to free an entire PMD page and will clear one of the four page-directory-pointer-table (aka pgd_t entries). The hardware aggressively "caches" these top-level entries and invlpg does not actually affect the CPU's copy. If we clear one we *HAVE* to do a full TLB flush, otherwise we might continue using a freed pmd page. (note, we do this properly on the population side in pud_populate()). This patch tracks whenever we clear one of these entries in the 'struct mmu_gather', and ensures that we follow up with a full tlb flush. BTW, I disassembled and checked that: if (tlb->fullmm == 0) and if (!tlb->fullmm && !tlb->need_flush_all) generate essentially the same code, so there should be zero impact there to the !PAE case. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Artem S Tashkinov <t.artem@mailcity.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-04-12 16:56:47 -07:00
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acpi	Fixes:	2013-03-12 20:25:53 -07:00
asm-generic	x86-32: Fix possible incomplete TLB invalidate with PAE pagetables	2013-04-12 16:56:47 -07:00
clocksource	ImgTec Meta architecture changes for v3.9-rc1	2013-03-03 12:06:09 -08:00
crypto
drm	drm/radeon: add Richland pci ids	2013-03-15 18:47:19 -04:00
keys
linux	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-04-10 14:15:27 -07:00
math-emu
media
memory
misc
net	af_iucv: fix recvmsg by replacing skb_pull() function	2013-04-08 17:16:57 -04:00
pcmcia
ras
rdma
rxrpc
scsi	libfc, fcoe, bnx2fc: Split fc_disc_init into fc_disc_{init, config}	2013-03-25 16:03:03 -07:00
sound	Merge remote-tracking branch 'asoc/fix/max98090' into asoc-next	2013-03-26 14:08:03 +00:00
target
trace	Various bug fixes for ext4. The most important is a fix for the new	2013-03-02 19:33:21 -08:00
uapi	net: fix *_DIAG_MAX constants	2013-03-21 12:36:33 -04:00
video	ARM: at91: fix LCD-wiring mode	2013-03-13 11:05:04 +01:00
xen	for-linus-20130331	2013-03-31 11:38:59 -07:00
Kbuild