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Roland McGrath 6ea65ff79c [PATCH] i386: clear segment register padding in core dumps ... The segment register slots in struct pt_regs are padded to 32 bits. Some of these are stored with instructions like "pushl %es", which leaves the high 16 bits as they were. So the high bits of these fields in struct pt_regs contain kernel stack garbage. These bits are ignored by everything and never leak to user space, except in core dumps. The user struct pt_regs is always at the base of the thread's kernel stack and so it seems unlikely the information that leaks from here is ever worthwhile so as to be a security concern, but I'm not sure about that. It has been this way for ages; userland consumers of core dumps all mask off these high bits themselves. So it is not urgent. This change masks off the padding bits of the segment register slots in core dumps. ptrace already masks off these high bits, so this makes the values in core dumps consistent with what ptrace would report just before the process died. As I read the processor manuals, the cs and ss values will always be padded with zero bits rather than stack garbage. But unlike "pushl %es", this is not simple to test with a userland program. So I added the two instructions rather than wonder if they are really never necessary. I think that x86_64 does not have this problem (for either 32-bit or 64-bit processes). It only uses "mov" instructions from segment registers, which zero-extend. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
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acpi	Pull bugzilla-8171 into release branch	18 years ago
asm-alpha	[PATCH] consolidate line discipline number definitions	18 years ago
asm-arm	Merge master.kernel.org:/home/rmk/linux-2.6-arm	18 years ago
asm-arm26	Storage class should be before const qualifier	18 years ago
asm-avr32	[PATCH] gpio_direction_output() needs an initial value	18 years ago
asm-cris	[PATCH] consolidate line discipline number definitions	18 years ago
asm-frv	[PATCH] FRV: Add some missng lazy MMU hooks for NOMMU mode	18 years ago
asm-generic	Revert "[PATCH] LOG2: Alter get_order() so that it can make use of ilog2() on a constant"	18 years ago
asm-h8300	[PATCH] consolidate line discipline number definitions	18 years ago
asm-i386	[PATCH] i386: clear segment register padding in core dumps	18 years ago
asm-ia64	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6	18 years ago
asm-m32r	[PATCH] m32r dma-mapping.h should simply include generic/dma-mapping-broken.h	18 years ago
asm-m68k	[PATCH] m68k dma-mapping: gfp_t annotations	18 years ago
asm-m68knommu	[PATCH] m68knommu: GPIO line defines for the ColdFire 5282	18 years ago
asm-mips	ide: remove static prototypes from include/asm-mips/mach-au1x00/au1xxx_ide.h	18 years ago
asm-parisc	Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6	18 years ago
asm-powerpc	[POWERPC] Avoid hypervisor statistics calculation in real mode	18 years ago
asm-ppc	[POWERPC] ppc: Add support for AMCC Taishan 440GX eval board	18 years ago
asm-s390	[S390] Wire up sys_utimes.	18 years ago
asm-sh	sh: Fix bogus regs pointer in do_IRQ().	18 years ago
asm-sh64	[PATCH] consolidate line discipline number definitions	18 years ago
asm-sparc	[PATCH] sparc: have dma-mapping.h include generic/dma-mapping-broken in non-PCI case	18 years ago
asm-sparc64	[SPARC64]: Get DEBUG_PAGEALLOC working again.	18 years ago
asm-um	[PATCH] uml: pte_mkread fix	18 years ago
asm-v850	[PATCH] consolidate line discipline number definitions	18 years ago
asm-x86_64	x86-64: add "local_apic_timer_c2_ok" here too	18 years ago
asm-xtensa	[PATCH] consolidate line discipline number definitions	18 years ago
crypto	…
keys	…
linux	[PATCH] lockdep: lockdep_depth vs. debug_locks	18 years ago
math-emu	…
media	V4L/DVB (5271): Add VIDIOC_TRY_ENCODER_CMD and VIDIOC_ENCODER_CMD ioctls.	18 years ago
mtd	…
net	[SCTP]: Reset some transport and association variables on restart	18 years ago
pcmcia	serial: Add PCMCIA IDs for Quatech DSP-100 dual RS232 adapter.	18 years ago
rdma	RDMA/cma: Add multicast communication support	18 years ago
rxrpc	…
scsi	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	18 years ago
sound	[ALSA] version 1.0.14rc3	18 years ago
video	[PATCH] Video: fb, add true ref_count atomicity	18 years ago
Kbuild	…