linux/arch/um
Jeff Dike 98c18238f1 [PATCH] uml: fix segfault on signal delivery
This fixes a process segfault where a signal was being delivered such that a
new stack page needed to be allocated to hold the signal frame.  This was
tripping some logic in the page fault handler which wouldn't allocate the page
if the faulting address was more that 32 bytes lower than the current stack
pointer.  Since a signal frame is greater than 32 bytes, this exercised that
case.

It's fixed by updating the SP in the pt_regs before starting to copy the
signal frame.  Since those are the registers that will be copied on to the
stack, we have to be careful to put the original SP, not the new one which
points to the signal frame, on the stack.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-27 08:44:38 -08:00
..
drivers [PATCH] uml: allow ubd devices to be shared in a cluster 2006-03-27 08:44:38 -08:00
include [PATCH] uml: oS header cleanups 2006-03-27 08:44:38 -08:00
kernel [PATCH] uml: move tty logging to os-Linux 2006-03-27 08:44:38 -08:00
os-Linux [PATCH] uml: move tty logging to os-Linux 2006-03-27 08:44:38 -08:00
scripts [PATCH] uml: arch/um/scripts/Makefile.rules - remove duplicated code 2005-12-18 11:19:44 -08:00
sys-i386 [PATCH] uml: fix segfault on signal delivery 2006-03-27 08:44:38 -08:00
sys-ia64 Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys-ppc [PATCH] uml: stack dump fix 2005-05-28 16:46:13 -07:00
sys-x86_64 [PATCH] uml: fix segfault on signal delivery 2006-03-27 08:44:38 -08:00
config.release Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
defconfig [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
Kconfig [PATCH] uml: arch Kconfig menu cleanups 2006-01-18 19:20:21 -08:00
Kconfig.char [PATCH] uml: Rename Kconfig files to be like the other arches 2005-09-05 00:06:19 -07:00
Kconfig.debug [PATCH] uml: workaround GDB problems on debugging 2005-09-05 00:06:20 -07:00
Kconfig.i386 [PATCH] um: fix undefined reference to hweight32 2006-03-26 08:57:09 -08:00
Kconfig.net [PATCH] uml: Rename Kconfig files to be like the other arches 2005-09-05 00:06:19 -07:00
Kconfig.scsi [PATCH] uml: Rename Kconfig files to be like the other arches 2005-09-05 00:06:19 -07:00
Kconfig.x86_64 [PATCH] um: fix undefined reference to hweight32 2006-03-26 08:57:09 -08:00
Makefile kbuild: change kbuild to not rely on incorrect GNU make behavior 2006-03-06 00:09:51 +01:00
Makefile-i386 [PATCH] uml: fixups for "reuse i386 cpu-specific tuning" 2005-11-13 18:14:14 -08:00
Makefile-ia64 Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-os-Linux Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-ppc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-skas [PATCH] uml makefiles sanitized 2005-09-29 08:46:26 -07:00
Makefile-tt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-x86_64 [PATCH] uml: fix dynamic linking on some 64-bit distros 2005-12-18 11:19:44 -08:00