diff options
Diffstat (limited to 'tools/test/stress2/misc/syzkaller85.sh')
| -rwxr-xr-x | tools/test/stress2/misc/syzkaller85.sh | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/syzkaller85.sh b/tools/test/stress2/misc/syzkaller85.sh new file mode 100755 index 000000000000..1772c0dc58b8 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller85.sh @@ -0,0 +1,499 @@ +#!/bin/sh + +# panic: Assertion uio->uio_resid < 0 failed at ../../../netlink/netlink_domain.c:808 +# cpuid = 8 +# time = 1759044376 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0184d17a70 +# vpanic() at vpanic+0x136/frame 0xfffffe0184d17ba0 +# panic() at panic+0x43/frame 0xfffffe0184d17c00 +# nl_soreceive() at nl_soreceive+0x433/frame 0xfffffe0184d17ca0 +# soreceive() at soreceive+0x45/frame 0xfffffe0184d17cc0 +# kern_recvit() at kern_recvit+0x181/frame 0xfffffe0184d17d70 +# sys_recvfrom() at sys_recvfrom+0xa2/frame 0xfffffe0184d17e00 +# amd64_syscall() at amd64_syscall+0x169/frame 0xfffffe0184d17f30 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0184d17f30 +# --- syscall (0, FreeBSD ELF64, syscall), rip = 0x822882cca, rsp = 0x823572e88, rbp = 0x823572f90 --- +# KDB: enter: panic +# [ thread pid 11012 tid 138112 ] +# Stopped at $0,0x121a722(%rip) +# db> x/s version +# version: FreeBSD 16.0-CURRENT #0 main-n280667-52eb7e394a7e-dirty: Sun Sep 28 08:56:14 CEST 2025 +# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO +# db> + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +set -u +prog=$(basename "$0" .sh) +cat > /tmp/$prog.c <<EOF +// https://syzkaller.appspot.com/bug?id=e33cdff88b17af77553159c4b372cac4e4bcd652 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// syzbot+194f95f2c5fdffef1ef5@syzkaller.appspotmail.com + +#define _GNU_SOURCE + +#include <sys/types.h> + +#include <dirent.h> +#include <errno.h> +#include <pthread.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/resource.h> +#include <sys/stat.h> +#include <sys/syscall.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +static unsigned long long procid; + +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 thread_start(void* (*fn)(void*), void* arg) +{ + pthread_t th; + pthread_attr_t attr; + pthread_attr_init(&attr); + pthread_attr_setstacksize(&attr, 128 << 10); + int i = 0; + for (; i < 100; i++) { + if (pthread_create(&th, &attr, fn, arg) == 0) { + pthread_attr_destroy(&attr); + return; + } + if (errno == EAGAIN) { + usleep(50); + continue; + } + break; + } + exit(1); +} + +typedef struct { + pthread_mutex_t mu; + pthread_cond_t cv; + int state; +} event_t; + +static void event_init(event_t* ev) +{ + if (pthread_mutex_init(&ev->mu, 0)) + exit(1); + if (pthread_cond_init(&ev->cv, 0)) + exit(1); + ev->state = 0; +} + +static void event_reset(event_t* ev) +{ + ev->state = 0; +} + +static void event_set(event_t* ev) +{ + pthread_mutex_lock(&ev->mu); + if (ev->state) + exit(1); + ev->state = 1; + pthread_mutex_unlock(&ev->mu); + pthread_cond_broadcast(&ev->cv); +} + +static void event_wait(event_t* ev) +{ + pthread_mutex_lock(&ev->mu); + while (!ev->state) + pthread_cond_wait(&ev->cv, &ev->mu); + pthread_mutex_unlock(&ev->mu); +} + +static int event_isset(event_t* ev) +{ + pthread_mutex_lock(&ev->mu); + int res = ev->state; + pthread_mutex_unlock(&ev->mu); + return res; +} + +static int event_timedwait(event_t* ev, uint64_t timeout) +{ + uint64_t start = current_time_ms(); + uint64_t now = start; + pthread_mutex_lock(&ev->mu); + for (;;) { + if (ev->state) + break; + uint64_t remain = timeout - (now - start); + struct timespec ts; + ts.tv_sec = remain / 1000; + ts.tv_nsec = (remain % 1000) * 1000 * 1000; + pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); + now = current_time_ms(); + if (now - start > timeout) + break; + } + int res = ev->state; + pthread_mutex_unlock(&ev->mu); + return res; +} + +static void sandbox_common() +{ + struct rlimit rlim; + rlim.rlim_cur = rlim.rlim_max = 128 << 20; + setrlimit(RLIMIT_AS, &rlim); + rlim.rlim_cur = rlim.rlim_max = 8 << 20; + setrlimit(RLIMIT_MEMLOCK, &rlim); + rlim.rlim_cur = rlim.rlim_max = 1 << 20; + setrlimit(RLIMIT_FSIZE, &rlim); + rlim.rlim_cur = rlim.rlim_max = 1 << 20; + setrlimit(RLIMIT_STACK, &rlim); + rlim.rlim_cur = rlim.rlim_max = 0; + setrlimit(RLIMIT_CORE, &rlim); + rlim.rlim_cur = rlim.rlim_max = 256; + setrlimit(RLIMIT_NOFILE, &rlim); +} + +static void loop(); + +static int do_sandbox_none(void) +{ + sandbox_common(); + loop(); + return 0; +} + +struct thread_t { + int created, call; + event_t ready, done; +}; + +static struct thread_t threads[16]; +static void execute_call(int call); +static int running; + +static void* thr(void* arg) +{ + struct thread_t* th = (struct thread_t*)arg; + for (;;) { + event_wait(&th->ready); + event_reset(&th->ready); + execute_call(th->call); + __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); + event_set(&th->done); + } + return 0; +} + +static void execute_one(void) +{ + if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { + } + int i, call, thread; + for (call = 0; call < 3; call++) { + for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); + thread++) { + struct thread_t* th = &threads[thread]; + if (!th->created) { + th->created = 1; + event_init(&th->ready); + event_init(&th->done); + event_set(&th->done); + thread_start(thr, th); + } + if (!event_isset(&th->done)) + continue; + event_reset(&th->done); + th->call = call; + __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); + event_set(&th->ready); + event_timedwait(&th->done, 50); + break; + } + } + for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) + sleep_ms(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_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + // socket arguments: [ + // domain: socket_domain = 0x26 (8 bytes) + // type: socket_type = 0x2 (8 bytes) + // proto: int8 = 0x0 (1 bytes) + // ] + // returns sock + res = syscall(SYS_socket, /*domain=AF_INET|0x24*/ 0x26ul, + /*type=SOCK_DGRAM*/ 2ul, /*proto=*/0); + if (res != -1) + r[0] = res; + break; + case 1: + // bind arguments: [ + // fd: sock (resource) + // addr: ptr[in, sockaddr_storage] { + // union sockaddr_storage { + // in6: sockaddr_in6 { + // len: len = 0x22 (1 bytes) + // family: const = 0x1c (1 bytes) + // port: proc = 0x3 (2 bytes) + // flow: int32 = 0x0 (4 bytes) + // addr: union ipv6_addr { + // mcast1: ipv6_addr_multicast1 { + // a0: const = 0xff (1 bytes) + // a1: const = 0x1 (1 bytes) + // a2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00} (length + // 0xd) a3: const = 0x1 (1 bytes) + // } + // } + // scope: int32 = 0x0 (4 bytes) + // } + // } + // } + // addrlen: len = 0xc (8 bytes) + // ] + NONFAILING(*(uint8_t*)0x200000000040 = 0x22); + NONFAILING(*(uint8_t*)0x200000000041 = 0x1c); + NONFAILING(*(uint16_t*)0x200000000042 = htobe16(0x4e23 + procid * 4)); + NONFAILING(*(uint32_t*)0x200000000044 = 0); + NONFAILING(*(uint8_t*)0x200000000048 = -1); + NONFAILING(*(uint8_t*)0x200000000049 = 1); + NONFAILING(memset((void*)0x20000000004a, 0, 13)); + NONFAILING(*(uint8_t*)0x200000000057 = 1); + NONFAILING(*(uint32_t*)0x200000000058 = 0); + syscall(SYS_bind, /*fd=*/r[0], /*addr=*/0x200000000040ul, + /*addrlen=*/0xcul); + break; + case 2: + // recvfrom\$inet arguments: [ + // fd: sock_in (resource) + // buf: nil + // len: len = 0x51 (8 bytes) + // f: recv_flags = 0x401313ab1a02f21f (8 bytes) + // addr: nil + // addrlen: len = 0x0 (8 bytes) + // ] + syscall(SYS_recvfrom, /*fd=*/r[0], /*buf=*/0ul, /*len=*/0x51ul, + /*f=MSG_PEEK|MSG_OOB|0x401313ab1a02f21c*/ 0x401313ab1a02f21ful, + /*addr=*/0ul, /*addrlen=*/0ul); + break; + } +} +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(); + for (procid = 0; procid < 4; procid++) { + if (fork() == 0) { + use_temporary_dir(); + do_sandbox_none(); + } + } + sleep(1000000); + return 0; +} +EOF +mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -pthread || exit 1 + +(cd ../testcases/swap; ./swap -t 5m -i 20 -l 100 > /dev/null 2>&1) & +sleep 5 + +work=/tmp/$prog.dir +rm -rf $work +mkdir $work +cd /tmp/$prog.dir + +timeout 5m /tmp/$prog > /dev/null 2>&1 + +while pkill swap; do :; done +wait + +rm -rf /tmp/$prog /tmp/$prog.c /tmp/$prog.core /tmp/syzkaller.?????? $work +exit 0 |