diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_div_overflow.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_div_overflow.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_div_overflow.c b/tools/testing/selftests/bpf/progs/verifier_div_overflow.c new file mode 100644 index 000000000000..458984da804c --- /dev/null +++ b/tools/testing/selftests/bpf/progs/verifier_div_overflow.c @@ -0,0 +1,144 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Converted from tools/testing/selftests/bpf/verifier/div_overflow.c */ + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include <limits.h> +#include "bpf_misc.h" + +/* Just make sure that JITs used udiv/umod as otherwise we get + * an exception from INT_MIN/-1 overflow similarly as with div + * by zero. + */ + +SEC("tc") +__description("DIV32 overflow, check 1") +__success __retval(0) +__naked void div32_overflow_check_1(void) +{ + asm volatile (" \ + w1 = -1; \ + w0 = %[int_min]; \ + w0 /= w1; \ + exit; \ +" : + : __imm_const(int_min, INT_MIN) + : __clobber_all); +} + +SEC("tc") +__description("DIV32 overflow, check 2") +__success __retval(0) +__naked void div32_overflow_check_2(void) +{ + asm volatile (" \ + w0 = %[int_min]; \ + w0 /= -1; \ + exit; \ +" : + : __imm_const(int_min, INT_MIN) + : __clobber_all); +} + +SEC("tc") +__description("DIV64 overflow, check 1") +__success __retval(0) +__naked void div64_overflow_check_1(void) +{ + asm volatile (" \ + r1 = -1; \ + r2 = %[llong_min] ll; \ + r2 /= r1; \ + w0 = 0; \ + if r0 == r2 goto l0_%=; \ + w0 = 1; \ +l0_%=: exit; \ +" : + : __imm_const(llong_min, LLONG_MIN) + : __clobber_all); +} + +SEC("tc") +__description("DIV64 overflow, check 2") +__success __retval(0) +__naked void div64_overflow_check_2(void) +{ + asm volatile (" \ + r1 = %[llong_min] ll; \ + r1 /= -1; \ + w0 = 0; \ + if r0 == r1 goto l0_%=; \ + w0 = 1; \ +l0_%=: exit; \ +" : + : __imm_const(llong_min, LLONG_MIN) + : __clobber_all); +} + +SEC("tc") +__description("MOD32 overflow, check 1") +__success __retval(INT_MIN) +__naked void mod32_overflow_check_1(void) +{ + asm volatile (" \ + w1 = -1; \ + w0 = %[int_min]; \ + w0 %%= w1; \ + exit; \ +" : + : __imm_const(int_min, INT_MIN) + : __clobber_all); +} + +SEC("tc") +__description("MOD32 overflow, check 2") +__success __retval(INT_MIN) +__naked void mod32_overflow_check_2(void) +{ + asm volatile (" \ + w0 = %[int_min]; \ + w0 %%= -1; \ + exit; \ +" : + : __imm_const(int_min, INT_MIN) + : __clobber_all); +} + +SEC("tc") +__description("MOD64 overflow, check 1") +__success __retval(1) +__naked void mod64_overflow_check_1(void) +{ + asm volatile (" \ + r1 = -1; \ + r2 = %[llong_min] ll; \ + r3 = r2; \ + r2 %%= r1; \ + w0 = 0; \ + if r3 != r2 goto l0_%=; \ + w0 = 1; \ +l0_%=: exit; \ +" : + : __imm_const(llong_min, LLONG_MIN) + : __clobber_all); +} + +SEC("tc") +__description("MOD64 overflow, check 2") +__success __retval(1) +__naked void mod64_overflow_check_2(void) +{ + asm volatile (" \ + r2 = %[llong_min] ll; \ + r3 = r2; \ + r2 %%= -1; \ + w0 = 0; \ + if r3 != r2 goto l0_%=; \ + w0 = 1; \ +l0_%=: exit; \ +" : + : __imm_const(llong_min, LLONG_MIN) + : __clobber_all); +} + +char _license[] SEC("license") = "GPL"; |