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Fernando Vazquez dc2bc768a0 [PATCH] stack overflow safe kdump: safe_smp_processor_id() ... This is a the first of a series of patch-sets aiming at making kdump more robust against stack overflows. This patch set does the following: * Add safe_smp_processor_id function to i386 architecture (this function was inspired by the x86_64 function of the same name). * Substitute "smp_processor_id" with the stack overflow-safe "safe_smp_processor_id" in the reboot path to the second kernel. This patch: On the event of a stack overflow critical data that usually resides at the bottom of the stack is likely to be stomped and, consequently, its use should be avoided. In particular, in the i386 and IA64 architectures the macro smp_processor_id ultimately makes use of the "cpu" member of struct thread_info which resides at the bottom of the stack. x86_64, on the other hand, is not affected by this problem because it benefits from the use of the PDA infrastructure. To circumvent this problem I suggest implementing "safe_smp_processor_id()" (it already exists in x86_64) for i386 and IA64 and use it as a replacement for smp_processor_id in the reboot path to the dump capture kernel. This is a possible implementation for i386. Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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acpi	…
asm-alpha	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-arm	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-arm26	…
asm-avr32	…
asm-cris	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-frv	[PATCH] ntp: cleanup defines and comments	19 years ago
asm-generic	[PATCH] Let WARN_ON/WARN_ON_ONCE return the condition	19 years ago
asm-h8300	[PATCH] remove SYSRQ_KEY and related defines from ppc/sh/h8300	19 years ago
asm-i386	[PATCH] stack overflow safe kdump: safe_smp_processor_id()	19 years ago
asm-ia64	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-m32r	[PATCH] ntp: cleanup defines and comments	19 years ago
asm-m68k	…
asm-m68knommu	…
asm-mips	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-parisc	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-powerpc	[PATCH] update legacy io handling for pmac	19 years ago
asm-ppc	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-s390	[PATCH] Directed yield: direct yield of spinlocks for s390.	19 years ago
asm-sh	[PATCH] remove SYSRQ_KEY and related defines from ppc/sh/h8300	19 years ago
asm-sh64	[PATCH] ntp: cleanup defines and comments	19 years ago
asm-sparc	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-sparc64	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	19 years ago
asm-um	[PATCH] uml: remove pte_mkexec	19 years ago
asm-v850	…
asm-x86_64	[PATCH] kill wall_jiffies	19 years ago
asm-xtensa	[PATCH] ntp: cleanup defines and comments	19 years ago
crypto	…
keys	…
linux	[PATCH] r/o bind mounts: monitor zeroing of i_nlink	19 years ago
math-emu	…
media	Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb	19 years ago
mtd	…
net	[PATCH] Add genetlink utilities for payload length calculation	19 years ago
pcmcia	…
rdma	…
rxrpc	…
scsi	[PATCH] scsi: device_reprobe() can fail	19 years ago
sound	[PATCH] maximum latency tracking: ALSA support	19 years ago
video	[HEADERS] One line per header in Kbuild files to reduce conflicts	19 years ago
Kbuild	[HEADERS] One line per header in Kbuild files to reduce conflicts	19 years ago