| // KASAN: use-after-free Read in xfs_inobt_init_key_from_rec |
| // https://syzkaller.appspot.com/bug?id=5e12ac175774b3ff672dbc5fb39b7bb9d94092b6 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/loop.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| extern unsigned long long procid; |
| |
| struct fs_image_segment { |
| void* data; |
| uintptr_t size; |
| uintptr_t offset; |
| }; |
| |
| #define IMAGE_MAX_SEGMENTS 4096 |
| #define IMAGE_MAX_SIZE (32 << 20) |
| |
| #define SYZ_memfd_create 319 |
| |
| static uintptr_t syz_mount_image(uintptr_t fs, uintptr_t dir, uintptr_t size, |
| uintptr_t nsegs, uintptr_t segments, |
| uintptr_t flags, uintptr_t opts) |
| { |
| char loopname[64]; |
| int loopfd, err = 0, res = -1; |
| uintptr_t i; |
| struct fs_image_segment* segs = (struct fs_image_segment*)segments; |
| |
| if (nsegs > IMAGE_MAX_SEGMENTS) |
| nsegs = IMAGE_MAX_SEGMENTS; |
| for (i = 0; i < nsegs; i++) { |
| if (segs[i].size > IMAGE_MAX_SIZE) |
| segs[i].size = IMAGE_MAX_SIZE; |
| segs[i].offset %= IMAGE_MAX_SIZE; |
| if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size) |
| segs[i].offset = IMAGE_MAX_SIZE - segs[i].size; |
| if (size < segs[i].offset + segs[i].offset) |
| size = segs[i].offset + segs[i].offset; |
| } |
| if (size > IMAGE_MAX_SIZE) |
| size = IMAGE_MAX_SIZE; |
| int memfd = syscall(SYZ_memfd_create, "syz_mount_image", 0); |
| if (memfd == -1) { |
| err = errno; |
| goto error; |
| } |
| if (ftruncate(memfd, size)) { |
| err = errno; |
| goto error_close_memfd; |
| } |
| for (i = 0; i < nsegs; i++) { |
| if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) { |
| } |
| } |
| snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); |
| loopfd = open(loopname, O_RDWR); |
| if (loopfd == -1) { |
| err = errno; |
| goto error_close_memfd; |
| } |
| if (ioctl(loopfd, LOOP_SET_FD, memfd)) { |
| if (errno != EBUSY) { |
| err = errno; |
| goto error_close_loop; |
| } |
| ioctl(loopfd, LOOP_CLR_FD, 0); |
| usleep(1000); |
| if (ioctl(loopfd, LOOP_SET_FD, memfd)) { |
| err = errno; |
| goto error_close_loop; |
| } |
| } |
| mkdir((char*)dir, 0777); |
| if (strcmp((char*)fs, "iso9660") == 0) |
| flags |= MS_RDONLY; |
| if (mount(loopname, (char*)dir, (char*)fs, flags, (char*)opts)) { |
| err = errno; |
| goto error_clear_loop; |
| } |
| res = 0; |
| error_clear_loop: |
| ioctl(loopfd, LOOP_CLR_FD, 0); |
| error_close_loop: |
| close(loopfd); |
| error_close_memfd: |
| close(memfd); |
| error: |
| errno = err; |
| return res; |
| } |
| |
| unsigned long long procid; |
| void loop() |
| { |
| memcpy((void*)0x20000000, "xfs", 4); |
| memcpy((void*)0x20000100, "./file0", 8); |
| *(uint64_t*)0x20000200 = 0x20010000; |
| memcpy((void*)0x20010000, |
| "\x58\x46\x53\x42\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00" |
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9f\x98" |
| "\x99\xff\xcb\xa1\x4e\xe6\xad\x52\x08\x20\x67\x09\xed\x75\x00\x00\x00" |
| "\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x35\xe0\x00\x00\x00\x00" |
| "\x00\x00\x35\xe1\x00\x00\x00\x00\x00\x00\x35\xe2\x00\x00\x00\x01\x00" |
| "\x00\x10\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03\x55\xb4\xa4" |
| "\x02\x00\x01\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x0c\x09\x08\x04\x0c\x00\x00\x19\x00\x00\x00\x00\x00\x00\x00\x40" |
| "\x00\x00\x00\x00\x00\x00\x00\x3d\x00\x00\x00\x00\x00\x00\x0c", |
| 151); |
| *(uint64_t*)0x20000208 = 0x97; |
| *(uint64_t*)0x20000210 = 0; |
| *(uint64_t*)0x20000218 = 0x20010200; |
| memcpy((void*)0x20010200, "\x58\x41\x47\x49\x00\x00\x00\x01\x00\x00\x00\x00" |
| "\x00\x00\x10\x00\x00\x00\x00\x40\x00\x00\x00\x03" |
| "\x00\x00\x00\x01\x00\x00\x00\x3d", |
| 32); |
| *(uint64_t*)0x20000220 = 0x20; |
| *(uint64_t*)0x20000228 = 0x400; |
| *(uint64_t*)0x20000230 = 0x20010800; |
| memcpy((void*)0x20010800, |
| "\x49\x41\x42\xff\x00\x00\x35\xe0\x00\x00\x00\x3d\xff", 13); |
| *(uint64_t*)0x20000238 = 0xd; |
| *(uint64_t*)0x20000240 = 0x3000; |
| *(uint64_t*)0x20000248 = 0x20010c00; |
| *(uint64_t*)0x20000250 = 0; |
| *(uint64_t*)0x20000258 = 0x35e000; |
| *(uint64_t*)0x20000260 = 0x20010e00; |
| *(uint64_t*)0x20000268 = 0; |
| *(uint64_t*)0x20000270 = 0x35e200; |
| *(uint64_t*)0x20000278 = 0x20011000; |
| *(uint64_t*)0x20000280 = 0; |
| *(uint64_t*)0x20000288 = 0x35e360; |
| *(uint64_t*)0x20000290 = 0x20011200; |
| *(uint64_t*)0x20000298 = 0; |
| *(uint64_t*)0x200002a0 = 0x35e460; |
| *(uint64_t*)0x200002a8 = 0x20011400; |
| *(uint64_t*)0x200002b0 = 0; |
| *(uint64_t*)0x200002b8 = 0x35e560; |
| *(uint64_t*)0x200002c0 = 0x20011600; |
| *(uint64_t*)0x200002c8 = 0; |
| *(uint64_t*)0x200002d0 = 0x35e660; |
| *(uint64_t*)0x200002d8 = 0x20011800; |
| *(uint64_t*)0x200002e0 = 0; |
| *(uint64_t*)0x200002e8 = 0x35e760; |
| *(uint64_t*)0x200002f0 = 0x20011a00; |
| *(uint64_t*)0x200002f8 = 0; |
| *(uint64_t*)0x20000300 = 0x35e860; |
| *(uint64_t*)0x20000308 = 0x20011c00; |
| *(uint64_t*)0x20000310 = 0; |
| *(uint64_t*)0x20000318 = 0x35e960; |
| *(uint64_t*)0x20000320 = 0x20011e00; |
| *(uint64_t*)0x20000328 = 0; |
| *(uint64_t*)0x20000330 = 0x35ea60; |
| *(uint64_t*)0x20000338 = 0x20012000; |
| *(uint64_t*)0x20000340 = 0; |
| *(uint64_t*)0x20000348 = 0x35eb60; |
| *(uint64_t*)0x20000350 = 0x20012200; |
| *(uint64_t*)0x20000358 = 0; |
| *(uint64_t*)0x20000360 = 0x35ec60; |
| *(uint64_t*)0x20000368 = 0x20012400; |
| *(uint64_t*)0x20000370 = 0; |
| *(uint64_t*)0x20000378 = 0x35ed60; |
| *(uint64_t*)0x20000380 = 0x20012600; |
| *(uint64_t*)0x20000388 = 0; |
| *(uint64_t*)0x20000390 = 0x35ee60; |
| *(uint64_t*)0x20000398 = 0x20012800; |
| *(uint64_t*)0x200003a0 = 0; |
| *(uint64_t*)0x200003a8 = 0x35ef60; |
| *(uint64_t*)0x200003b0 = 0x20012a00; |
| *(uint64_t*)0x200003b8 = 0; |
| *(uint64_t*)0x200003c0 = 0x35f060; |
| *(uint64_t*)0x200003c8 = 0x20012c00; |
| *(uint64_t*)0x200003d0 = 0; |
| *(uint64_t*)0x200003d8 = 0x35f160; |
| *(uint64_t*)0x200003e0 = 0x20012e00; |
| *(uint64_t*)0x200003e8 = 0; |
| *(uint64_t*)0x200003f0 = 0x35f260; |
| *(uint64_t*)0x200003f8 = 0x20013000; |
| *(uint64_t*)0x20000400 = 0; |
| *(uint64_t*)0x20000408 = 0x35f360; |
| *(uint64_t*)0x20000410 = 0x20013200; |
| *(uint64_t*)0x20000418 = 0; |
| *(uint64_t*)0x20000420 = 0x35f460; |
| *(uint64_t*)0x20000428 = 0x20013400; |
| *(uint64_t*)0x20000430 = 0; |
| *(uint64_t*)0x20000438 = 0x35f560; |
| *(uint64_t*)0x20000440 = 0x20013600; |
| *(uint64_t*)0x20000448 = 0; |
| *(uint64_t*)0x20000450 = 0x35f660; |
| *(uint64_t*)0x20000458 = 0x20013800; |
| *(uint64_t*)0x20000460 = 0; |
| *(uint64_t*)0x20000468 = 0x35f760; |
| *(uint64_t*)0x20000470 = 0x20013a00; |
| *(uint64_t*)0x20000478 = 0; |
| *(uint64_t*)0x20000480 = 0x35f860; |
| *(uint64_t*)0x20000488 = 0x20013c00; |
| *(uint64_t*)0x20000490 = 0; |
| *(uint64_t*)0x20000498 = 0x35f960; |
| *(uint64_t*)0x200004a0 = 0x20013e00; |
| *(uint64_t*)0x200004a8 = 0; |
| *(uint64_t*)0x200004b0 = 0x35fa60; |
| *(uint64_t*)0x200004b8 = 0x20014000; |
| *(uint64_t*)0x200004c0 = 0; |
| *(uint64_t*)0x200004c8 = 0x35fb60; |
| *(uint64_t*)0x200004d0 = 0x20014200; |
| *(uint64_t*)0x200004d8 = 0; |
| *(uint64_t*)0x200004e0 = 0x35fc60; |
| *(uint64_t*)0x200004e8 = 0x20014400; |
| *(uint64_t*)0x200004f0 = 0; |
| *(uint64_t*)0x200004f8 = 0x35fd60; |
| *(uint64_t*)0x20000500 = 0x20014600; |
| *(uint64_t*)0x20000508 = 0; |
| *(uint64_t*)0x20000510 = 0x35fe60; |
| *(uint64_t*)0x20000518 = 0x20014800; |
| *(uint64_t*)0x20000520 = 0; |
| *(uint64_t*)0x20000528 = 0x35ff60; |
| *(uint64_t*)0x20000530 = 0x20014a00; |
| *(uint64_t*)0x20000538 = 0; |
| *(uint64_t*)0x20000540 = 0x360060; |
| *(uint64_t*)0x20000548 = 0x20014c00; |
| *(uint64_t*)0x20000550 = 0; |
| *(uint64_t*)0x20000558 = 0x360160; |
| *(uint64_t*)0x20000560 = 0x20014e00; |
| *(uint64_t*)0x20000568 = 0; |
| *(uint64_t*)0x20000570 = 0x360260; |
| *(uint64_t*)0x20000578 = 0x20015000; |
| *(uint64_t*)0x20000580 = 0; |
| *(uint64_t*)0x20000588 = 0x360360; |
| *(uint64_t*)0x20000590 = 0x20015200; |
| *(uint64_t*)0x20000598 = 0; |
| *(uint64_t*)0x200005a0 = 0x360460; |
| *(uint64_t*)0x200005a8 = 0x20015400; |
| *(uint64_t*)0x200005b0 = 0; |
| *(uint64_t*)0x200005b8 = 0x360560; |
| *(uint64_t*)0x200005c0 = 0x20015600; |
| *(uint64_t*)0x200005c8 = 0; |
| *(uint64_t*)0x200005d0 = 0x360660; |
| *(uint64_t*)0x200005d8 = 0x20015800; |
| *(uint64_t*)0x200005e0 = 0; |
| *(uint64_t*)0x200005e8 = 0x360760; |
| *(uint64_t*)0x200005f0 = 0x20015a00; |
| *(uint64_t*)0x200005f8 = 0; |
| *(uint64_t*)0x20000600 = 0x360860; |
| *(uint64_t*)0x20000608 = 0x20015c00; |
| *(uint64_t*)0x20000610 = 0; |
| *(uint64_t*)0x20000618 = 0x360960; |
| *(uint64_t*)0x20000620 = 0x20015e00; |
| *(uint64_t*)0x20000628 = 0; |
| *(uint64_t*)0x20000630 = 0x360a60; |
| *(uint64_t*)0x20000638 = 0x20016000; |
| *(uint64_t*)0x20000640 = 0; |
| *(uint64_t*)0x20000648 = 0x360b60; |
| *(uint64_t*)0x20000650 = 0x20016200; |
| *(uint64_t*)0x20000658 = 0; |
| *(uint64_t*)0x20000660 = 0x360c60; |
| *(uint64_t*)0x20000668 = 0x20016400; |
| *(uint64_t*)0x20000670 = 0; |
| *(uint64_t*)0x20000678 = 0x360d60; |
| *(uint64_t*)0x20000680 = 0x20016600; |
| *(uint64_t*)0x20000688 = 0; |
| *(uint64_t*)0x20000690 = 0x360e60; |
| *(uint64_t*)0x20000698 = 0x20016800; |
| *(uint64_t*)0x200006a0 = 0; |
| *(uint64_t*)0x200006a8 = 0x360f60; |
| *(uint64_t*)0x200006b0 = 0x20016a00; |
| *(uint64_t*)0x200006b8 = 0; |
| *(uint64_t*)0x200006c0 = 0x361060; |
| *(uint64_t*)0x200006c8 = 0x20016c00; |
| *(uint64_t*)0x200006d0 = 0; |
| *(uint64_t*)0x200006d8 = 0x361160; |
| *(uint64_t*)0x200006e0 = 0x20016e00; |
| *(uint64_t*)0x200006e8 = 0; |
| *(uint64_t*)0x200006f0 = 0x361260; |
| *(uint64_t*)0x200006f8 = 0x20017000; |
| *(uint64_t*)0x20000700 = 0; |
| *(uint64_t*)0x20000708 = 0x361360; |
| *(uint64_t*)0x20000710 = 0x20017200; |
| *(uint64_t*)0x20000718 = 0; |
| *(uint64_t*)0x20000720 = 0x361460; |
| *(uint64_t*)0x20000728 = 0x20017400; |
| *(uint64_t*)0x20000730 = 0; |
| *(uint64_t*)0x20000738 = 0x361560; |
| *(uint64_t*)0x20000740 = 0x20017600; |
| *(uint64_t*)0x20000748 = 0; |
| *(uint64_t*)0x20000750 = 0x361660; |
| *(uint64_t*)0x20000758 = 0x20017800; |
| *(uint64_t*)0x20000760 = 0; |
| *(uint64_t*)0x20000768 = 0x361760; |
| *(uint64_t*)0x20000770 = 0x20017a00; |
| *(uint64_t*)0x20000778 = 0; |
| *(uint64_t*)0x20000780 = 0x361860; |
| *(uint64_t*)0x20000788 = 0x20017c00; |
| *(uint64_t*)0x20000790 = 0; |
| *(uint64_t*)0x20000798 = 0x361960; |
| *(uint64_t*)0x200007a0 = 0x20017e00; |
| *(uint64_t*)0x200007a8 = 0; |
| *(uint64_t*)0x200007b0 = 0x361a60; |
| *(uint64_t*)0x200007b8 = 0x20018000; |
| *(uint64_t*)0x200007c0 = 0; |
| *(uint64_t*)0x200007c8 = 0x361b60; |
| *(uint64_t*)0x200007d0 = 0x20018200; |
| *(uint64_t*)0x200007d8 = 0; |
| *(uint64_t*)0x200007e0 = 0x361c60; |
| *(uint64_t*)0x200007e8 = 0x20018400; |
| *(uint64_t*)0x200007f0 = 0; |
| *(uint64_t*)0x200007f8 = 0x361d60; |
| *(uint64_t*)0x20000800 = 0x20018600; |
| *(uint64_t*)0x20000808 = 0; |
| *(uint64_t*)0x20000810 = 0x361e60; |
| *(uint64_t*)0x20000818 = 0x20018800; |
| *(uint64_t*)0x20000820 = 0; |
| *(uint64_t*)0x20000828 = 0x361f60; |
| memcpy((void*)0x20018900, "nouuid,", 7); |
| *(uint8_t*)0x20018907 = 0; |
| syz_mount_image(0x20000000, 0x20000100, 0x1000000, 0x42, 0x20000200, 0, |
| 0x20018900); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |
