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083772c9f9
Link the page pools with netdevs. This needs to be netns compatible so we have two options. Either we record the pools per netns and have to worry about moving them as the netdev gets moved. Or we record them directly on the netdev so they move with the netdev without any extra work. Implement the latter option. Since pools may outlast netdev we need a place to store orphans. In time honored tradition use loopback for this purpose. Reviewed-by: Mina Almasry <almasrymina@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Jesper Dangaard Brouer <hawk@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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 *) 0x122 + POISON_POINTER_DELTA)
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/********** include/linux/timer.h **********/
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#define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA)
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/********** mm/page_poison.c **********/
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#define PAGE_POISON 0xaa
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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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/********** security/ **********/
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#define KEY_DESTROY 0xbd
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/********** net/core/page_pool.c **********/
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#define PP_SIGNATURE (0x40 + POISON_POINTER_DELTA)
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/********** net/core/skbuff.c **********/
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#define SKB_LIST_POISON_NEXT ((void *)(0x800 + POISON_POINTER_DELTA))
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/********** net/ **********/
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#define NET_PTR_POISON ((void *)(0x801 + POISON_POINTER_DELTA))
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/********** kernel/bpf/ **********/
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#define BPF_PTR_POISON ((void *)(0xeB9FUL + POISON_POINTER_DELTA))
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/********** VFS **********/
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#define VFS_PTR_POISON ((void *)(0xF5 + POISON_POINTER_DELTA))
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#endif
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