From 33a154a96e71a34a1bcca9f40da343dbbf7b38b4 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 1 Oct 2026 14:52:55 +0000 Subject: selftests/bpf: Test packet range of pointers sharing an id Add tests where two packet pointers share an id and tightening one pointer's umax from its var_off would put it less than their constant distance from the other's umax: with an index & 0x38 capped at 50, the base pointer keeps umax 50, so the pointer 8 bytes further on must keep umax 58, even though its known bits allow at most 56. These refused a valid program or accepted an out-of-bounds access before the fix: - check the advanced copy, load through the base: valid, was refused; - check the base, load the byte at base + 1 through a copy advanced by 8: was accepted; - check base + 4, load 4 bytes at base + 2 through base + 8: reads two bytes past the checked range, was accepted; - the same as the second with data_meta pointers checked against data: was accepted. These pass with and without the fix and cover nearby paths: - subtract an unknown scalar from a checked pointer and load below it (the range is kept across a new id); - reach a load through two paths whose checks cover 8 and 7 bytes after the loaded pointer; the second path must not be pruned by the first; - spill a copy of a pointer, check the pointer, fill the copy and load one byte past the checked range: the load is refused, and the copy has the range of the check. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- include/rdma/ib_sysfs.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 include/rdma/ib_sysfs.h (limited to 'include/rdma/ib_sysfs.h') diff --git a/include/rdma/ib_sysfs.h b/include/rdma/ib_sysfs.h new file mode 100644 index 000000000..3b77cfd74 --- /dev/null +++ b/include/rdma/ib_sysfs.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright (c) 2021 Mellanox Technologies Ltd. All rights reserved. + */ +#ifndef DEF_RDMA_IB_SYSFS_H +#define DEF_RDMA_IB_SYSFS_H + +#include + +struct ib_device; + +struct ib_port_attribute { + struct attribute attr; + ssize_t (*show)(struct ib_device *ibdev, u32 port_num, + struct ib_port_attribute *attr, char *buf); + ssize_t (*store)(struct ib_device *ibdev, u32 port_num, + struct ib_port_attribute *attr, const char *buf, + size_t count); +}; + +#define IB_PORT_ATTR_RW(_name) \ + struct ib_port_attribute ib_port_attr_##_name = __ATTR_RW(_name) + +#define IB_PORT_ATTR_ADMIN_RW(_name) \ + struct ib_port_attribute ib_port_attr_##_name = \ + __ATTR_RW_MODE(_name, 0600) + +#define IB_PORT_ATTR_RO(_name) \ + struct ib_port_attribute ib_port_attr_##_name = __ATTR_RO(_name) + +#define IB_PORT_ATTR_WO(_name) \ + struct ib_port_attribute ib_port_attr_##_name = __ATTR_WO(_name) + +struct ib_device *ib_port_sysfs_get_ibdev_kobj(struct kobject *kobj, + u32 *port_num); + +#endif -- cgit v1.3.1