forked from Minki/linux
ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE
To avoid slab to warn about exceeded size, fail early if queue
occupies more than KMALLOC_MAX_SIZE.
Reported-by: syzbot+e4d4f9ddd4295539735d@syzkaller.appspotmail.com
Fixes: 2e0ab8ca83
("ptr_ring: array based FIFO for pointers")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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6e6e41c311
@ -466,6 +466,8 @@ static inline int ptr_ring_consume_batched_bh(struct ptr_ring *r,
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static inline void **__ptr_ring_init_queue_alloc(unsigned int size, gfp_t gfp)
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{
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if (size * sizeof(void *) > KMALLOC_MAX_SIZE)
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return NULL;
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return kcalloc(size, sizeof(void *), gfp);
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}
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