// https://syzkaller.appspot.com/bug?id=780c368310e332c6e13e5a1ac3eb7b5d0d3a4aa4 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } static int inject_fault(int nth) { int fd; fd = open("/proc/thread-self/fail-nth", O_RDWR); if (fd == -1) exit(1); char buf[16]; sprintf(buf, "%d", nth); if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf)) exit(1); return fd; } static const char* setup_fault() { int fd = open("/proc/self/make-it-fail", O_WRONLY); if (fd == -1) return "CONFIG_FAULT_INJECTION is not enabled"; close(fd); fd = open("/proc/thread-self/fail-nth", O_WRONLY); if (fd == -1) return "kernel does not have systematic fault injection support"; close(fd); static struct { const char* file; const char* val; bool fatal; } files[] = { {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true}, {"/sys/kernel/debug/fail_futex/ignore-private", "N", false}, {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false}, {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false}, {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false}, }; unsigned i; for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].file, files[i].val)) { if (files[i].fatal) return "failed to write fault injection file"; } } return NULL; } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; if ((reason = setup_fault())) printf("the reproducer may not work as expected: fault injection setup " "failed: %s\n", reason); intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000180; *(uint8_t*)0x20000180 = 0x18; STORE_BY_BITMASK(uint8_t, , 0x20000181, 0, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000181, 0, 4, 4); *(uint16_t*)0x20000182 = 0; *(uint32_t*)0x20000184 = 8; *(uint8_t*)0x20000188 = 0; *(uint8_t*)0x20000189 = 0; *(uint16_t*)0x2000018a = 0; *(uint32_t*)0x2000018c = 0; *(uint8_t*)0x20000190 = 0x85; *(uint8_t*)0x20000191 = 0; *(uint16_t*)0x20000192 = 0; *(uint32_t*)0x20000194 = 0x23; *(uint8_t*)0x20000198 = 0x18; STORE_BY_BITMASK(uint8_t, , 0x20000199, 1, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000199, 0, 4, 4); *(uint16_t*)0x2000019a = 0; *(uint32_t*)0x2000019c = 0x25752020; *(uint8_t*)0x200001a0 = 0; *(uint8_t*)0x200001a1 = 0; *(uint16_t*)0x200001a2 = 0; *(uint32_t*)0x200001a4 = 0x20202000; STORE_BY_BITMASK(uint8_t, , 0x200001a8, 3, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x200001a8, 3, 3, 2); STORE_BY_BITMASK(uint8_t, , 0x200001a8, 3, 5, 3); STORE_BY_BITMASK(uint8_t, , 0x200001a9, 0xa, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x200001a9, 1, 4, 4); *(uint16_t*)0x200001aa = 0xfff8; *(uint32_t*)0x200001ac = 0; STORE_BY_BITMASK(uint8_t, , 0x200001b0, 7, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x200001b0, 1, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x200001b0, 0xb, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x200001b1, 1, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x200001b1, 0xa, 4, 4); *(uint16_t*)0x200001b2 = 0; *(uint32_t*)0x200001b4 = 0; STORE_BY_BITMASK(uint8_t, , 0x200001b8, 7, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x200001b8, 0, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x200001b8, 0, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x200001b9, 1, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x200001b9, 0, 4, 4); *(uint16_t*)0x200001ba = 0; *(uint32_t*)0x200001bc = 0xfffffff8; STORE_BY_BITMASK(uint8_t, , 0x200001c0, 7, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x200001c0, 0, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x200001c0, 0xb, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x200001c1, 2, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x200001c1, 0, 4, 4); *(uint16_t*)0x200001c2 = 0; *(uint32_t*)0x200001c4 = 8; STORE_BY_BITMASK(uint8_t, , 0x200001c8, 7, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x200001c8, 0, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x200001c8, 0xb, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x200001c9, 3, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x200001c9, 0, 4, 4); *(uint16_t*)0x200001ca = 0; *(uint32_t*)0x200001cc = 5; *(uint8_t*)0x200001d0 = 0x85; *(uint8_t*)0x200001d1 = 0; *(uint16_t*)0x200001d2 = 0; *(uint32_t*)0x200001d4 = 0x2d; *(uint8_t*)0x200001d8 = 0x95; *(uint8_t*)0x200001d9 = 0; *(uint16_t*)0x200001da = 0; *(uint32_t*)0x200001dc = 0; *(uint64_t*)0x200000d0 = 0; *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = -1; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; *(uint32_t*)0x20000150 = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x94ul); *(uint32_t*)0x200000c0 = 0x11; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000180; *(uint64_t*)0x200000d0 = 0x20000240; memcpy((void*)0x20000240, "GPL\000", 4); *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; *(uint32_t*)0x20000150 = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); if (res != -1) r[0] = res; *(uint64_t*)0x200002c0 = 0x20000280; memcpy((void*)0x20000280, "timer_start\000", 12); *(uint32_t*)0x200002c8 = r[0]; *(uint32_t*)0x200002cc = 0; *(uint64_t*)0x200002d0 = 0; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200002c0ul, /*size=*/0x10ul); res = -1; res = syz_open_dev(/*dev=*/0xc, /*major=*/4, /*minor=*/1); if (res != -1) r[1] = res; res = syscall(__NR_dup, /*oldfd=*/r[1]); if (res != -1) r[2] = res; *(uint32_t*)0x20001040 = 0xa; memcpy( (void*)0x20001044, "\xa2\xe3\xad\x21\x4f\xc7\x52\xf9\x1b\x29\x09\x09\x4b\xf7\x0e\x0d\xd0\x38" "\xe7\xff\x7f\xc6\xe5\x53\x9b\x32\x66\x07\x8b\x08\x9b\x3b\x08\x38\x44\x09" "\x08\x90\xe0\x87\x8f\x0e\x1a\xc6\xe7\x04\x9b\x3d\x6d\x95\x9b\x66\x9a\x24" "\x0d\x5b\x67\xf3\x98\x8f\x7e\xf3\x19\x52\x01\x00\xff\xe8\xd1\x78\x70\x8c" "\x52\x3c\x92\x1b\x1b\x5b\x33\x3b\x0d\x07\x68\x09\x36\xcd\x3b\x78\x13\x0d" "\xaa\x61\xd8\xe8\x09\xea\x88\x9b\x58\x02\xb7\x7f\x07\x22\x72\x27\xb7\xba" "\x67\xe0\xe7\x86\x69\xa6\xf5\xc2\xa8\x74\xe6\x2a\x9c\xcd\xc0\xd3\x1a\x0c" "\x9f\x31\x8c\x0d\xa1\x99\x3b\xd1\x60\xe2\x33\xdf\x4a\x62\x17\x9c\x6f\x30" "\xe0\x65\xcd\x5b\x91\xcd\x0a\xfc\x93\x97\xd6\x96\xd0\xd7\x58\xf2\xdc\x7d" "\x1c\x00\x30\x5d\x3f\x46\x63\x5e\xb0\x16\xd5\xb1\xdd\xa9\x8e\x2d\x74\x9b" "\xe7\xbd\x1d\xf1\xfb\x3b\x23\x1f\xdc\xdb\x50\x75\xa9\xaa\xa1\xb4\x69\xc3" "\x09\x00\x00\x00\x00\x02\x33\x58\x75\x27\x1b\x28\x63\x29\xd1\x69\x93\x42" "\x88\xfd\x78\x9a\xa3\x7d\x6e\x98\xb2\x24\xfd\x44\xb6\x5b\x31\x33\x4f\xfc" "\x55\xcc\x82\xcd\x3a\xc3\x2e\xcd\xb0\x8c\xed\x6f\x90\x81\xb4\xdd\x0d\x8b" "\x38\xf3\xcd\x44\x98\xbe\xe8\x00\x49\x08\x41\xbd\xb1\x14\xf6\xb7\x63\x83" "\x70\x9d\x8f\x5c\x55\x43\x2a\x90\x9f\xda\x03\x9a\xec\x54\xa1\x23\x6e\x80" "\xf6\x25\x87\x42\x31\x76\x62\x49\x6b\xdd\xbb\x42\xbe\x6b\xfb\x2f\x17\x95" "\x9d\x1f\xe9\x0a\x56\xc7\x1b\x19\x31\x87\x02\x62\xf5\xe8\x01\x11\x92\x42" "\xca\x02\x6b\xfc\x82\x1e\x7e\x7d\xaf\x24\x51\x13\x8e\x64\x5b\xb8\x0c\x61" "\x76\x01\x00\x00\x00\xbe\x70\xde\x98\xec\x76\xa9\xe4\x0d\xad\x47\xf3\x6f" "\xd9\xf7\xd0\xd4\x2a\x4b\x5f\x11\x85\xcc\xdc\xf1\x6f\xf4\x62\x95\xd8\xa0" "\xfa\x17\x71\x3c\x58\x02\x63\x09\x33\xa9\xa3\x4a\xf6\x74\xf3\xf3\x9f\xe2" "\x34\x91\x23\x7c\x08\x82\x2d\xec\x11\x09\x11\xe8\x93\xd0\xa8\xc4\xf6\x77" "\x74\x7a\xbc\x36\x09\x34\xb8\x29\x10\xff\x85\xbf\xd9\x95\x08\x3b\xba\x29" "\x87\xa6\x73\x99\xea\xc4\x27\xd1\x45\xd5\x95\xa4\x0b\x9f\x6f\xf1\x4a\xc4" "\x88\xec\x13\x0f\xb3\x85\x0a\x27\xaf\x95\x44\xae\x15\xa7\xe4\x54\xde\xa0" "\x59\x18\xb4\x12\x43\x51\x3f\x00\x00\x00\x00\x00\x00\x00\x0a\x36\x21\xc5" "\x6c\xea\x8d\x20\xfa\x91\x1a\x0c\x41\xdb\x6e\xbe\x8c\xac\x64\xf1\x76\x79" "\x14\x1d\x54\xb3\x4b\xbc\x99\x80\x00\x00\x00\xb3\x30\x96\x03\xf1\xd4\xab" "\x96\x62\x03\x86\x1b\x5b\x15\xa8\x41\xf2\xb5\x75\xa8\xbd\x0d\x78\x24\x8e" "\xbe\x4d\x9a\x80\x00\x26\x95\x10\x4f\x67\x4c\x24\x31\xdc\xa1\x41\xfa\xe2" "\x69\xca\xb7\x0e\x9a\x66\xf3\xc3\xa9\xa6\x3e\x96\x39\xe1\xf5\x9c\x0e\xde" "\x26\xc6\xb5\xd7\x4b\x07\x8a\x5e\x15\xc3\x16\x34\xe5\xae\x09\x8c\xe9\xee" "\x70\x77\x1a\xaa\x18\x11\x9a\x86\x7e\x00\x88\x33\x49\x75\xe9\xf7\x34\x83" "\xb6\xc8\x2f\xa6\x78\xca\x14\xff\xd9\xf9\xdb\x2a\x78\x69\xd8\x58\x64\x05" "\x65\x26\xf8\x89\xaf\x43\xa6\x05\x60\x80\x57\x22\x86\x52\x24\x49\xdf\x46" "\x6c\x63\x2b\x35\x70\x24\x3f\x98\x9c\xce\x38\x03\xf4\x65\xe4\x1e\x61\x0c" 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"\xf0\xe5\x8f\xde\xd8\xa7\xb4\xa3\x02\xa9\x7b\xc6\x41\xdf\x07\x72\x0b\xa2" "\xb2\x6b\xbf\xcc\x80\x7c\xa0\xab\xb1\xb4\x43\x22\x26\x9c\x21\xc5\xec\x68" "\xcb\x06\x8e\xa8\x80\x67\xd9\x05\xea\x91\x7b\xb0\x3e\xef\xda\xeb\xde\xab" "\xf2\xd0\xdc\xe8\x09\x97\xc9\x15\xc8\x94\x9d\xe9\x92\x58\x7c\x2c\xb5\xfe" "\x36\x05\x00\x00\x00\x00\x00\x00\x00\xb7\x79\x40\xb5\xf0\x77\x22\xe4\x7a" "\x08\xd3\x67\x95\x07\x00\x00\x00\x00\x00\x00\x93\x4b\x99\xb3\x10\x9a\xf6" "\x5d\x77\xe8\x6a\xbd\x68\x59\xcd\xdf\x4b\xba\xe1\xf0\x93\x04\x62\xdf\x15" "\xfd\xdb\xc4\x85\x62\xea\x35\x11\xa8\x06\x5e\xf0\x28\xcf\x12\xf1\x4d\xcf" "\x6e\xbe\xcd\x8d\x88\x48\x36\x17\x4f\xaf\x1a\xa6\x09\xe5\xf1\xee\x10\x62" "\xdf\xa1\x3b\xdc\x1f\xa7\xcf\xaa\xdb\xa8\x5c\x72\xe9\x75\x8f\x03\xa7\x55" "\xd0\xbe\x53\xf8\xd2\xa1\xdf\x0d\x07\xb3\xd5\xbd\x3b\x01\xfa\xff\xd0\xad" "\xdb\xed\x28\x81\xa9\x70\x0a\xf5\x61\xac\x8c\x7e\x36\xbb\x2f\xc4\xc4\x0e" "\x9c\x76\x6c\x06\x81\x7b\xb9\x03\x72\x9a\x7d\xb6\xff\x95\x76\x97\xc9\xed" "\xe7\x88\x5d\x94\xff\xb0\x75\x9b\xe0\xda\xf6\x0a\xf9\x31\x09\xeb\x1d\xee" "\x72\xe4\x36\x3f\x51\xaf\x62\xaf\x6f\xb2\xa6\xdf\x3b\xec\x89\x82\x2a\x7a" "\x0b\x67\x80\x58\xfa\x3f\xef\x86\xfa\xec\x21\x6e\xb6\x99\x21\x62\xf8\xdc" "\xbf\x71\x9c\x14\x84\xd2\xf9\xc5\x5f\x49\x01\x20\x3a\x9a\x8a\x2c\x3e\x90" "\xf3\x9c\x3d\xbc\x10\x36\x0a\x1a\x49\x70\x0d\x1d\xfb\xf6\x6d\x69\xf6\xfb" "\xaf\x50\x6c\x8b\xcc\xe8\xbb\x0d\x87\x2a\x02\x23\x89\x26\x40\x7a\x4e\xdd" "\xd5\xd0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 4096); *(uint16_t*)0x20002044 = 0x1025; inject_fault(3); syscall(__NR_write, /*fd=*/r[2], /*data=*/0x20001040ul, /*len=*/0x1006ul); return 0; }