| // general protection fault in __radix_tree_delete |
| // https://syzkaller.appspot.com/bug?id=aec313f3f7ebc2ee0abb1104a3631ab8fd1e90f2 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| static void use_temporary_dir() |
| { |
| char tmpdir_template[] = "./syzkaller.XXXXXX"; |
| char* tmpdir = mkdtemp(tmpdir_template); |
| if (!tmpdir) |
| fail("failed to mkdtemp"); |
| if (chmod(tmpdir, 0777)) |
| fail("failed to chmod"); |
| if (chdir(tmpdir)) |
| fail("failed to chdir"); |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| void loop() |
| { |
| while (1) { |
| execute_one(); |
| } |
| } |
| |
| uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| void execute_one() |
| { |
| long res = 0; |
| memcpy((void*)0x20307ff7, "/dev/kvm", 9); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20307ff7, 0, 0); |
| if (res != -1) |
| r[0] = res; |
| res = syscall(__NR_ioctl, r[0], 0xae01, 0); |
| if (res != -1) |
| r[1] = res; |
| res = syscall(__NR_eventfd2, 0, 0); |
| if (res != -1) |
| r[2] = res; |
| *(uint32_t*)0x20000100 = 0; |
| *(uint32_t*)0x20000104 = r[2]; |
| *(uint32_t*)0x20000108 = 0; |
| *(uint32_t*)0x2000010c = 0; |
| *(uint32_t*)0x20000110 = 0; |
| *(uint32_t*)0x20000114 = 0; |
| syscall(__NR_ioctl, r[1], 0x4018aebd, 0x20000100); |
| *(uint32_t*)0x20000000 = 0x80ffff; |
| *(uint32_t*)0x20000004 = -1; |
| *(uint32_t*)0x20000008 = 1; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint32_t*)0x20000010 = 0; |
| *(uint32_t*)0x20000014 = 0; |
| syscall(__NR_ioctl, r[1], 0x4018aebd, 0x20000000); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| char* cwd = get_current_dir_name(); |
| for (;;) { |
| if (chdir(cwd)) |
| fail("failed to chdir"); |
| use_temporary_dir(); |
| loop(); |
| } |
| } |