| // INFO: rcu detected stall in blkdev_ioctl |
| // https://syzkaller.appspot.com/bug?id=1f7b710f4110f225aed1f4263ec2b98b8dbd472e |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t 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)); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| void loop() |
| { |
| while (1) { |
| execute_one(); |
| } |
| } |
| |
| uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff}; |
| void execute_one() |
| { |
| long res = 0; |
| memcpy((void*)0x20000300, "/dev/loop#", 11); |
| res = syz_open_dev(0x20000300, 0, 0); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x200001c0, "/dev/loop#", 11); |
| res = syz_open_dev(0x200001c0, 0x400, 0); |
| if (res != -1) |
| r[1] = res; |
| syscall(__NR_ioctl, r[1], 0x4c00, r[0]); |
| memcpy((void*)0x20000000, "/proc/self/net/pfkey", 21); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0, 0); |
| if (res != -1) |
| r[2] = res; |
| memcpy((void*)0x20000100, "/dev/loop#", 11); |
| res = syz_open_dev(0x20000100, 0, 0x101906); |
| if (res != -1) |
| r[3] = res; |
| syscall(__NR_ioctl, r[3], 0x4c00, r[2]); |
| syscall(__NR_ioctl, r[3], 0x4c06, r[3]); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| loop(); |
| } |
| } |