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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/int_ptr.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" SEC("cgroup/sysctl") __description("ARG_PTR_TO_LONG uninitialized") __failure __msg("invalid indirect read from stack R4 off -16+0 size 8") __naked void arg_ptr_to_long_uninitialized(void) { asm volatile (" \ /* bpf_strtoul arg1 (buf) */ \ r7 = r10; \ r7 += -8; \ r0 = 0x00303036; \ *(u64*)(r7 + 0) = r0; \ r1 = r7; \ /* bpf_strtoul arg2 (buf_len) */ \ r2 = 4; \ /* bpf_strtoul arg3 (flags) */ \ r3 = 0; \ /* bpf_strtoul arg4 (res) */ \ r7 += -8; \ r4 = r7; \ /* bpf_strtoul() */ \ call %[bpf_strtoul]; \ r0 = 1; \ exit; \ " : : __imm(bpf_strtoul) : __clobber_all); } SEC("socket") __description("ARG_PTR_TO_LONG half-uninitialized") /* in privileged mode reads from uninitialized stack locations are permitted */ __success __failure_unpriv __msg_unpriv("invalid indirect read from stack R4 off -16+4 size 8") __retval(0) __naked void ptr_to_long_half_uninitialized(void) { asm volatile (" \ /* bpf_strtoul arg1 (buf) */ \ r7 = r10; \ r7 += -8; \ r0 = 0x00303036; \ *(u64*)(r7 + 0) = r0; \ r1 = r7; \ /* bpf_strtoul arg2 (buf_len) */ \ r2 = 4; \ /* bpf_strtoul arg3 (flags) */ \ r3 = 0; \ /* bpf_strtoul arg4 (res) */ \ r7 += -8; \ *(u32*)(r7 + 0) = r0; \ r4 = r7; \ /* bpf_strtoul() */ \ call %[bpf_strtoul]; \ r0 = 0; \ exit; \ " : : __imm(bpf_strtoul) : __clobber_all); } SEC("cgroup/sysctl") __description("ARG_PTR_TO_LONG misaligned") __failure __msg("misaligned stack access off (0x0; 0x0)+-20+0 size 8") __naked void arg_ptr_to_long_misaligned(void) { asm volatile (" \ /* bpf_strtoul arg1 (buf) */ \ r7 = r10; \ r7 += -8; \ r0 = 0x00303036; \ *(u64*)(r7 + 0) = r0; \ r1 = r7; \ /* bpf_strtoul arg2 (buf_len) */ \ r2 = 4; \ /* bpf_strtoul arg3 (flags) */ \ r3 = 0; \ /* bpf_strtoul arg4 (res) */ \ r7 += -12; \ r0 = 0; \ *(u32*)(r7 + 0) = r0; \ *(u64*)(r7 + 4) = r0; \ r4 = r7; \ /* bpf_strtoul() */ \ call %[bpf_strtoul]; \ r0 = 1; \ exit; \ " : : __imm(bpf_strtoul) : __clobber_all); } SEC("cgroup/sysctl") __description("ARG_PTR_TO_LONG size < sizeof(long)") __failure __msg("invalid indirect access to stack R4 off=-4 size=8") __naked void to_long_size_sizeof_long(void) { asm volatile (" \ /* bpf_strtoul arg1 (buf) */ \ r7 = r10; \ r7 += -16; \ r0 = 0x00303036; \ *(u64*)(r7 + 0) = r0; \ r1 = r7; \ /* bpf_strtoul arg2 (buf_len) */ \ r2 = 4; \ /* bpf_strtoul arg3 (flags) */ \ r3 = 0; \ /* bpf_strtoul arg4 (res) */ \ r7 += 12; \ *(u32*)(r7 + 0) = r0; \ r4 = r7; \ /* bpf_strtoul() */ \ call %[bpf_strtoul]; \ r0 = 1; \ exit; \ " : : __imm(bpf_strtoul) : __clobber_all); } SEC("cgroup/sysctl") __description("ARG_PTR_TO_LONG initialized") __success __naked void arg_ptr_to_long_initialized(void) { asm volatile (" \ /* bpf_strtoul arg1 (buf) */ \ r7 = r10; \ r7 += -8; \ r0 = 0x00303036; \ *(u64*)(r7 + 0) = r0; \ r1 = r7; \ /* bpf_strtoul arg2 (buf_len) */ \ r2 = 4; \ /* bpf_strtoul arg3 (flags) */ \ r3 = 0; \ /* bpf_strtoul arg4 (res) */ \ r7 += -8; \ *(u64*)(r7 + 0) = r0; \ r4 = r7; \ /* bpf_strtoul() */ \ call %[bpf_strtoul]; \ r0 = 1; \ exit; \ " : : __imm(bpf_strtoul) : __clobber_all); } char _license[] SEC("license") = "GPL"; |