kgess-mirror/freebsd-src
1
0
Fork 0
mirror of https://git.freebsd.org/src.git synced 2026-01-16 23:02:24 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

stress2: Added a syzkaller reproducer
Some checks are pending
Cross-build Kernel / amd64 ubuntu-22.04 (clang-15) (push) Waiting to run
Details
Cross-build Kernel / aarch64 ubuntu-22.04 (clang-15) (push) Waiting to run
Details
Cross-build Kernel / amd64 ubuntu-24.04 (clang-18) (push) Waiting to run
Details
Cross-build Kernel / aarch64 ubuntu-24.04 (clang-18) (push) Waiting to run
Details
Cross-build Kernel / amd64 macos-latest (clang-18) (push) Waiting to run
Details
Cross-build Kernel / aarch64 macos-latest (clang-18) (push) Waiting to run
Details

Browse source
This commit is contained in:
Peter Holm 2025-11-12 09:33:15 +01:00
parent 53880f09fb
commit 539726e86d
1 changed files with 384 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

384
tools/test/stress2/misc/syzkaller87.sh Executable file
View file

@ -0,0 +1,384 @@
#!/bin/sh
# panic: freevnode: cannot lock vp 0xfffffe01634e4de0 for pollinfo destroy
# cpuid = 7
# time = 1762875612
# KDB: stack backtrace:
# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00ffce8bd0
# vpanic() at vpanic+0x136/frame 0xfffffe00ffce8d00
# panic() at panic+0x43/frame 0xfffffe00ffce8d60
# freevnode() at freevnode+0x536/frame 0xfffffe00ffce8dc0
# vput_final() at vput_final+0x96/frame 0xfffffe00ffce8e10
# inotify_reap() at inotify_reap+0x6e/frame 0xfffffe00ffce8e40
# taskqueue_run_locked() at taskqueue_run_locked+0x1c2/frame 0xfffffe00ffce8ec0
# taskqueue_thread_loop() at taskqueue_thread_loop+0xd3/frame 0xfffffe00ffce8ef0
# fork_exit() at fork_exit+0x82/frame 0xfffffe00ffce8f30
# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00ffce8f30
# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
# KDB: enter: panic
# [ thread pid 0 tid 100045 ]
# Stopped at $0,0x12129d2(%rip)
# db> x/s version
# version: FreeBSD 16.0-CURRENT #0 main-n281796-e1c6f4cb9bd2-dirty: Tue Nov 11 10:53:40 CET 2025
# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
# db>
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
set -u
prog=$(basename "$0" .sh)
cat > /tmp/$prog.c <<EOF
// https://syzkaller.appspot.com/bug?id=8a22955cd068cf454dd8062d24e826c72b1c4542
// autogenerated by syzkaller (https://github.com/google/syzkaller)
// syzbot+6676b3ff282d590b0fb3@syzkaller.appspotmail.com
#define _GNU_SOURCE
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/endian.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#ifndef SYS___specialfd
#define SYS___specialfd 577
#endif
#ifndef SYS_inotify_add_watch_at
#define SYS_inotify_add_watch_at 593
#endif
static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;
static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
{
if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
exit(sig);
}
uintptr_t addr = (uintptr_t)info->si_addr;
const uintptr_t prog_start = 1 << 20;
const uintptr_t prog_end = 100 << 20;
int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
int valid = addr < prog_start || addr > prog_end;
if (sig == SIGBUS)
valid = 1;
if (skip && valid) {
_longjmp(segv_env, 1);
}
exit(sig);
}
static void install_segv_handler(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_sigaction = segv_handler;
sa.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
}
#define NONFAILING(...) \
({ \
int ok = 1; \
__atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \
if (_setjmp(segv_env) == 0) { \
__VA_ARGS__; \
} else \
ok = 0; \
__atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \
ok; \
})
static void kill_and_wait(int pid, int* status)
{
kill(pid, SIGKILL);
while (waitpid(-1, status, 0) != pid) {
}
}
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 void reset_flags(const char* filename)
{
struct stat st;
if (lstat(filename, &st))
exit(1);
st.st_flags &= ~(SF_NOUNLINK | UF_NOUNLINK | SF_IMMUTABLE | UF_IMMUTABLE |
SF_APPEND | UF_APPEND);
if (lchflags(filename, st.st_flags))
exit(1);
}
static void __attribute__((noinline)) remove_dir(const char* dir)
{
DIR* dp = opendir(dir);
if (dp == NULL) {
if (errno == EACCES) {
if (rmdir(dir))
exit(1);
return;
}
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);
struct stat st;
if (lstat(filename, &st))
exit(1);
if (S_ISDIR(st.st_mode)) {
remove_dir(filename);
continue;
}
if (unlink(filename)) {
if (errno == EPERM) {
reset_flags(filename);
reset_flags(dir);
if (unlink(filename) == 0)
continue;
}
exit(1);
}
}
closedir(dp);
while (rmdir(dir)) {
if (errno == EPERM) {
reset_flags(dir);
if (rmdir(dir) == 0)
break;
}
exit(1);
}
}
static void execute_one(void);
#define WAIT_FLAGS 0
static void loop(void)
{
int iter = 0;
for (;; iter++) {
char cwdbuf[32];
sprintf(cwdbuf, "./%d", iter);
if (mkdir(cwdbuf, 0777))
exit(1);
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
if (chdir(cwdbuf))
exit(1);
execute_one();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
sleep_ms(10);
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
break;
if (current_time_ms() - start < 5000)
continue;
kill_and_wait(pid, &status);
break;
}
remove_dir(cwdbuf);
}
}
uint64_t r[1] = {0xffffffffffffffff};
void execute_one(void)
{
intptr_t res = 0;
if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
}
// openat\$evdev arguments: [
// fd: const = 0xffffffffffffff9c (8 bytes)
// file: ptr[in, buffer] {
// buffer: {2f 64 65 76 2f 69 6e 70 75 74 2f 65 76 65 6e 74 4e 00}
// (length 0x12)
// }
// flags: open_flags = 0x100 (8 bytes)
// mode: const = 0x0 (8 bytes)
// ]
// returns fd_evdev
NONFAILING(memcpy((void*)0x200000000040, "/dev/input/eventN\000", 18));
syscall(SYS_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000040ul,
/*flags=O_NOFOLLOW*/ 0x100ul, /*mode=*/0ul);
// kqueue arguments: [
// ]
// returns kqueue
syscall(SYS_kqueue);
// pipe2 arguments: [
// pipefd: ptr[out, pipefd] {
// pipefd {
// rfd: fd (resource)
// wfd: fd (resource)
// }
// }
// flags: pipe_flags = 0x0 (8 bytes)
// ]
syscall(SYS_pipe2, /*pipefd=*/0x200000000480ul, /*flags=*/0ul);
// socket\$unix arguments: [
// domain: const = 0x1 (8 bytes)
// type: unix_socket_type = 0x5 (8 bytes)
// proto: const = 0x0 (1 bytes)
// ]
// returns sock_unix
syscall(SYS_socket, /*domain=*/1ul, /*type=SOCK_SEQPACKET*/ 5ul, /*proto=*/0);
// kqueue arguments: [
// ]
// returns kqueue
syscall(SYS_kqueue);
// mprotect arguments: [
// addr: VMA[0x2000]
// len: len = 0x2000 (8 bytes)
// prot: mmap_prot = 0x5 (8 bytes)
// ]
syscall(SYS_mprotect, /*addr=*/0x200000000000ul, /*len=*/0x2000ul,
/*prot=PROT_READ|PROT_EXEC*/ 5ul);
// symlink arguments: [
// old: ptr[in, buffer] {
// buffer: {2e 00} (length 0x2)
// }
// new: ptr[in, buffer] {
// buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
// }
// ]
NONFAILING(memcpy((void*)0x200000000000, ".\000", 2));
NONFAILING(memcpy((void*)0x200000000040, "./file0\000", 8));
syscall(SYS_symlink, /*old=*/0x200000000000ul, /*new=*/0x200000000040ul);
// __specialfd\$inotify arguments: [
// type: const = 0x2 (8 bytes)
// req: ptr[in, specialfd_inotify] {
// specialfd_inotify {
// flags: inotify_flags = 0x0 (4 bytes)
// }
// }
// len: len = 0x4 (8 bytes)
// ]
// returns fd_inotify
NONFAILING(*(uint32_t*)0x200000000180 = 0);
res = syscall(SYS___specialfd, /*type=*/2ul, /*req=*/0x200000000180ul,
/*len=*/4ul);
if (res != -1)
r[0] = res;
// inotify_add_watch_at arguments: [
// fd: fd_inotify (resource)
// dfd: fd_dir (resource)
// file: ptr[in, buffer] {
// buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
// 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 2f 66
// 69 6c 65 30 00} (length 0xff)
// }
// mask: inotify_mask = 0x82000204 (8 bytes)
// ]
// returns inotifydesc
NONFAILING(
memcpy((void*)0x200000000040,
"./"
"file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/file0\000",
255));
syscall(SYS_inotify_add_watch_at, /*fd=*/r[0], /*dfd=*/(intptr_t)-1,
/*file=*/0x200000000040ul,
/*mask=IN_ONESHOT|IN_DONT_FOLLOW|IN_DELETE|IN_ATTRIB*/ 0x82000204ul);
// unlink arguments: [
// path: ptr[in, buffer] {
// buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
// }
// ]
NONFAILING(memcpy((void*)0x200000000040, "./file0\000", 8));
syscall(SYS_unlink, /*path=*/0x200000000040ul);
}
int main(void)
{
syscall(SYS_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
/*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x1012ul,
/*fd=*/(intptr_t)-1, /*offset=*/0ul);
const char* reason;
(void)reason;
install_segv_handler();
use_temporary_dir();
loop();
return 0;
}
EOF
mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1
(cd ../testcases/swap; ./swap -t 3m -i 30 -l 100 > /dev/null 2>&1) &
sleep 5
work=/tmp/$prog.dir
rm -rf $work
mkdir $work
cd /tmp/$prog.dir
for i in `jot 30`; do
(
mkdir d$i
cd d$i
timeout 3m /tmp/$prog > /dev/null 2>&1 &
)
done
while pgrep -q $prog; do sleep 2; done
while pkill swap; do :; done
wait
rm -rf /tmp/$prog /tmp/$prog.c /tmp/$prog.core /tmp/syzkaller.?????? $work
exit 0