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android_kernel_motorola_sm6375/arch/um
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Filename Latest commit message Latest commit date
Andy Lutomirski f56141e3e2 all arches, signal: move restart_block to struct task_struct 
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.

[[email protected]: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Al Viro <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: David Miller <[email protected]>
Acked-by: Richard Weinberger <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Russell King <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Cc: Hans-Christian Egtvedt <[email protected]>
Cc: Steven Miao <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: Mikael Starvik <[email protected]>
Cc: Jesper Nilsson <[email protected]>
Cc: David Howells <[email protected]>
Cc: Richard Kuo <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Tested-by: Michael Ellerman <[email protected]> (powerpc)
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Chen Liqin <[email protected]>
Cc: Lennox Wu <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Guenter Roeck <[email protected]>
Signed-off-by: James Hogan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
2015-02-12 18:54:12 -08:00
..
configs arch/um: make it work with defconfig and x86_64 2013-11-17 11:31:48 +01:00
drivers uml: Fix unsafe pid reference to foreground process group 2014-11-05 16:26:13 -08:00
include all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
kernel vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
os-Linux Revert "um: Fix wait_stub_done() error handling" 2014-07-20 12:56:34 +02:00
scripts
sys-ia64
sys-ppc dump_stack: unify debug information printed by show_regs() 2013-04-30 17:04:02 -07:00
.gitignore
Kconfig.char um: remove used STDIO_CONSOLE Kconfig param 2013-11-17 11:32:27 +01:00
Kconfig.common um: Skip futex_atomic_cmpxchg_inatomic() test 2015-01-04 14:20:26 +01:00
Kconfig.debug
Kconfig.net
Kconfig.rest
Kconfig.um
Makefile um: Fix for relative objtree when generating x86 headers 2014-06-05 17:55:48 +02:00
Makefile-ia64
Makefile-os-Linux
Makefile-ppc
Makefile-skas