BMC/Intel-BMC/linux.git/arch/hexagon/kernel/signal.c, branch dev

all arches, signal: move restart_block to struct task_struct

2015-02-13T02:54:12+00:00

If an attacker can cause a controlled kernel stack overflow, overwriting the restart block is a very juicy exploit target. This is because the restart_block is held in the same memory allocation as the kernel stack. Moving the restart block to struct task_struct prevents this exploit by making the restart_block harder to locate. Note that there are other fields in thread_info that are also easy targets, at least on some architectures. It's also a decent simplification, since the restart code is more or less identical on all architectures. [james.hogan@imgtec.com: metag: align thread_info::supervisor_stack] Signed-off-by: Andy Lutomirski Cc: Thomas Gleixner Cc: Al Viro Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Kees Cook Cc: David Miller Acked-by: Richard Weinberger Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Vineet Gupta Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Steven Miao Cc: Mark Salter Cc: Aurelien Jacquiot Cc: Mikael Starvik Cc: Jesper Nilsson Cc: David Howells Cc: Richard Kuo Cc: "Luck, Tony" Cc: Geert Uytterhoeven Cc: Michal Simek Cc: Ralf Baechle Cc: Jonas Bonn Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Acked-by: Michael Ellerman (powerpc) Tested-by: Michael Ellerman (powerpc) Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Chen Liqin Cc: Lennox Wu Cc: Chris Metcalf Cc: Guan Xuetao Cc: Chris Zankel Cc: Max Filippov Cc: Oleg Nesterov Cc: Guenter Roeck Signed-off-by: James Hogan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

hexagon: Use sigsp()

2014-08-06T11:04:08+00:00

Use sigsp() instead of the open coded variant. Signed-off-by: Richard Weinberger

hexagon: Use get_signal() signal_setup_done()

2014-08-06T11:02:14+00:00

Use the more generic functions get_signal() signal_setup_done() for signal delivery. Acked-by: Richard Kuo Signed-off-by: Richard Weinberger

Hexagon: update copyright dates

2013-05-01T00:40:27+00:00

Signed-off-by: Richard Kuo

Hexagon: check to if we will overflow the signal stack

2013-05-01T00:40:24+00:00

Signed-off-by: Richard Kuo

Hexagon: Signal and return path fixes

2013-05-01T00:40:24+00:00

This fixes the return value of sigreturn and moves the work pending check into a c routine for readability and fixes the loop for multiple pending signals. Based on feedback from Al Viro. Signed-off-by: Richard Kuo

Hexagon: add support for new v4+ registers

2013-05-01T00:40:23+00:00

Add support for a couple new v4+ registers, along with newer save/restore pt_regs. Signed-off-by: Richard Kuo

hexagon: don't leave ->uc_stack uninitialized

2013-02-03T23:15:58+00:00

it's used on rt_sigreturn(2) Signed-off-by: Al Viro

hexagon: switch to generic sigaltstack

2013-02-03T23:15:57+00:00

Signed-off-by: Al Viro

Merge branch 'arch-frv' into no-rebases

2012-11-17T03:27:58+00:00