#include #include #include #include "utils.h" #define SIZE 256 #define ITERATIONS 10000 int test_memcmp(const void *s1, const void *s2, size_t n); /* test all offsets and lengths */ static void test_one(char *s1, char *s2) { unsigned long offset, size; for (offset = 0; offset < SIZE; offset++) { for (size = 0; size < (SIZE-offset); size++) { int x, y; unsigned long i; y = memcmp(s1+offset, s2+offset, size); x = test_memcmp(s1+offset, s2+offset, size); if (((x ^ y) < 0) && /* Trick to compare sign */ ((x | y) != 0)) { /* check for zero */ printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size); for (i = offset; i < offset+size; i++) printf("%02x ", s1[i]); printf("\n"); for (i = offset; i < offset+size; i++) printf("%02x ", s2[i]); printf("\n"); abort(); } } } } static int testcase(void) { char *s1; char *s2; unsigned long i; s1 = memalign(128, SIZE); if (!s1) { perror("memalign"); exit(1); } s2 = memalign(128, SIZE); if (!s2) { perror("memalign"); exit(1); } srandom(1); for (i = 0; i < ITERATIONS; i++) { unsigned long j; unsigned long change; for (j = 0; j < SIZE; j++) s1[j] = random(); memcpy(s2, s1, SIZE); /* change one byte */ change = random() % SIZE; s2[change] = random() & 0xff; test_one(s1, s2); } srandom(1); for (i = 0; i < ITERATIONS; i++) { unsigned long j; unsigned long change; for (j = 0; j < SIZE; j++) s1[j] = random(); memcpy(s2, s1, SIZE); /* change multiple bytes, 1/8 of total */ for (j = 0; j < SIZE / 8; j++) { change = random() % SIZE; s2[change] = random() & 0xff; } test_one(s1, s2); } return 0; } int main(void) { return test_harness(testcase, "memcmp"); } urity/integrity/evm/evm_crypto.c?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc'>treecommitdiff
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authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-16 09:34:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-16 09:34:37 -0800
commit2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc (patch)
tree4d8ea8e6ca52f1938269937834641205d8d888f0 /security/integrity/evm/evm_crypto.c
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
parentce1ca7d2d140a1f4aaffd297ac487f246963dd2f (diff)
Merge tag 'nfsd-4.10-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd fixes from Bruce Fields: "Miscellaneous nfsd bugfixes, one for a 4.10 regression, three for older bugs" * tag 'nfsd-4.10-1' of git://linux-nfs.org/~bfields/linux: svcrdma: avoid duplicate dma unmapping during error recovery sunrpc: don't call sleeping functions from the notifier block callbacks svcrpc: don't leak contexts on PROC_DESTROY nfsd: fix supported attributes for acl & labels
Diffstat (limited to 'security/integrity/evm/evm_crypto.c')