forked from luck/tmp_suning_uos_patched
977625a693
Help catch cases where mutex_lock is used directly on w/w mutexes, which otherwise result in the w/w tasks reading uninitialized data. Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Maarten Lankhorst <dev@mblankhorst.nl> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dri-devel@lists.freedesktop.org Link: http://lkml.kernel.org/r/1482346000-9927-12-git-send-email-nhaehnle@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
#ifndef _LINUX_POISON_H
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#define _LINUX_POISON_H
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/********** include/linux/list.h **********/
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/*
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* Architectures might want to move the poison pointer offset
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* into some well-recognized area such as 0xdead000000000000,
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* that is also not mappable by user-space exploits:
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*/
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#ifdef CONFIG_ILLEGAL_POINTER_VALUE
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# define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL)
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#else
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# define POISON_POINTER_DELTA 0
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#endif
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/*
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* These are non-NULL pointers that will result in page faults
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* under normal circumstances, used to verify that nobody uses
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* non-initialized list entries.
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*/
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#define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA)
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#define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA)
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/********** include/linux/timer.h **********/
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/*
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* Magic number "tsta" to indicate a static timer initializer
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* for the object debugging code.
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*/
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#define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA)
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/********** mm/debug-pagealloc.c **********/
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#ifdef CONFIG_PAGE_POISONING_ZERO
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#define PAGE_POISON 0x00
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#else
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#define PAGE_POISON 0xaa
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#endif
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/********** mm/page_alloc.c ************/
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#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
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/********** mm/slab.c **********/
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/*
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* Magic nums for obj red zoning.
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* Placed in the first word before and the first word after an obj.
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*/
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#define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
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#define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
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#define SLUB_RED_INACTIVE 0xbb
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#define SLUB_RED_ACTIVE 0xcc
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/* ...and for poisoning */
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#define POISON_INUSE 0x5a /* for use-uninitialised poisoning */
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#define POISON_FREE 0x6b /* for use-after-free poisoning */
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#define POISON_END 0xa5 /* end-byte of poisoning */
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/********** arch/$ARCH/mm/init.c **********/
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#define POISON_FREE_INITMEM 0xcc
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/********** arch/ia64/hp/common/sba_iommu.c **********/
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/*
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* arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
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* value of "SBAIOMMU POISON\0" for spill-over poisoning.
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*/
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/********** fs/jbd/journal.c **********/
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#define JBD_POISON_FREE 0x5b
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#define JBD2_POISON_FREE 0x5c
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/********** drivers/base/dmapool.c **********/
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#define POOL_POISON_FREED 0xa7 /* !inuse */
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#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
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/********** drivers/atm/ **********/
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#define ATM_POISON_FREE 0x12
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#define ATM_POISON 0xdeadbeef
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/********** kernel/mutexes **********/
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#define MUTEX_DEBUG_INIT 0x11
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#define MUTEX_DEBUG_FREE 0x22
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#define MUTEX_POISON_WW_CTX ((void *) 0x500 + POISON_POINTER_DELTA)
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/********** lib/flex_array.c **********/
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#define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
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/********** security/ **********/
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#define KEY_DESTROY 0xbd
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#endif
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