diff options
Diffstat (limited to 'tools/test/stress2/misc/syzkaller84.sh')
| -rwxr-xr-x | tools/test/stress2/misc/syzkaller84.sh | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/syzkaller84.sh b/tools/test/stress2/misc/syzkaller84.sh new file mode 100755 index 000000000000..a7976be2eeb6 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller84.sh @@ -0,0 +1,402 @@ +#!/bin/sh + +# panic: Assertion !(sb->sb_state & SBS_CANTRCVMORE) failed at ../../../kern/uipc_usrreq.c:1549 +# cpuid = 6 +# time = 1754809105 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0176ef6a80 +# vpanic() at vpanic+0x136/frame 0xfffffe0176ef6bb0 +# panic() at panic+0x43/frame 0xfffffe0176ef6c10 +# uipc_soreceive_stream_or_seqpacket() at uipc_soreceive_stream_or_seqpacket+0x968/frame 0xfffffe0176ef6cd0 +# soreceive() at soreceive+0x45/frame 0xfffffe0176ef6cf0 +# kern_recvit() at kern_recvit+0x181/frame 0xfffffe0176ef6da0 +# sys_recvmsg() at sys_recvmsg+0x67/frame 0xfffffe0176ef6e00 +# amd64_syscall() at amd64_syscall+0x169/frame 0xfffffe0176ef6f30 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0176ef6f30 +# --- syscall (0, FreeBSD ELF64, syscall), rip = 0x821d3da8a, rsp = 0x824440f68, rbp = 0x824440f90 --- +# KDB: enter: panic +# [ thread pid 17448 tid 292963 ] +# Stopped at kdb_enter+0x33: movq $0,0x12304a2(%rip) +# db> x/s version +# version: FreeBSD 15.0-PRERELEASE #0 main-n279510-db7c0e32a05d-dirty: Sat Aug 9 17:21:54 CEST 2025 +# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO +# db> + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +set -u +prog=$(basename "$0" .sh) +cat > /tmp/$prog.c <<EOF +// https://syzkaller.appspot.com/bug?id=79d6de939eb5c7de69e8e4993b6239aa0ae67335 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// syzbot+ffcc3612ea266e36604e@syzkaller.appspotmail.com + +#define _GNU_SOURCE + +#include <sys/types.h> + +#include <errno.h> +#include <pthread.h> +#include <pwd.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/syscall.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +static unsigned long long procid; + +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 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 < 4; 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++*/) { + int pid = fork(); + if (pid < 0) + exit(1); + if (pid == 0) { + 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; + } + } +} + +uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + // socketpair\$unix arguments: [ + // domain: const = 0x1 (8 bytes) + // type: unix_socket_type = 0x5 (8 bytes) + // proto: const = 0x0 (1 bytes) + // fds: ptr[out, unix_pair] { + // unix_pair { + // fd0: sock_unix (resource) + // fd1: sock_unix (resource) + // } + // } + // ] + res = syscall(SYS_socketpair, /*domain=*/1ul, /*type=SOCK_SEQPACKET*/ 5ul, + /*proto=*/0, /*fds=*/0x200000000440ul); + if (res != -1) { + r[0] = *(uint32_t*)0x200000000440; + r[1] = *(uint32_t*)0x200000000444; + } + break; + case 1: + // sendmsg arguments: [ + // fd: sock (resource) + // msg: ptr[in, send_msghdr] { + // send_msghdr { + // msg_name: nil + // msg_namelen: len = 0x0 (4 bytes) + // pad = 0x0 (4 bytes) + // msg_iov: nil + // msg_iovlen: len = 0x0 (8 bytes) + // msg_control: ptr[inout, array[ANYUNION]] { + // array[ANYUNION] { + // union ANYUNION { + // ANYBLOB: buffer: {04 01 00 00 ff ff 00 00 01} (length 0x9) + // } + // } + // } + // msg_controllen: bytesize = 0x104 (8 bytes) + // msg_flags: const = 0x0 (4 bytes) + // pad = 0x0 (4 bytes) + // } + // } + // f: send_flags = 0x0 (8 bytes) + // ] + *(uint64_t*)0x200000000000 = 0; + *(uint32_t*)0x200000000008 = 0; + *(uint64_t*)0x200000000010 = 0; + *(uint64_t*)0x200000000018 = 0; + *(uint64_t*)0x200000000020 = 0x2000000007c0; + memcpy((void*)0x2000000007c0, "\x04\x01\x00\x00\xff\xff\x00\x00\x01", 9); + *(uint64_t*)0x200000000028 = 0x104; + *(uint32_t*)0x200000000030 = 0; + syscall(SYS_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000000ul, /*f=*/0ul); + for (int i = 0; i < 32; i++) { + syscall(SYS_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000000ul, /*f=*/0ul); + } + break; + case 2: + // close arguments: [ + // fd: fd (resource) + // ] + syscall(SYS_close, /*fd=*/r[1]); + break; + case 3: + // recvmsg arguments: [ + // fd: sock (resource) + // msg: ptr[inout, recv_msghdr] { + // recv_msghdr { + // msg_name: nil + // msg_namelen: len = 0x0 (4 bytes) + // pad = 0x0 (4 bytes) + // msg_iov: nil + // msg_iovlen: len = 0x0 (8 bytes) + // msg_control: ptr[out, buffer] { + // buffer: (DirOut) + // } + // msg_controllen: len = 0x19 (8 bytes) + // msg_flags: const = 0x0 (4 bytes) + // pad = 0x0 (4 bytes) + // } + // } + // f: recv_flags = 0x80 (8 bytes) + // ] + *(uint64_t*)0x2000000005c0 = 0; + *(uint32_t*)0x2000000005c8 = 0; + *(uint64_t*)0x2000000005d0 = 0; + *(uint64_t*)0x2000000005d8 = 0; + *(uint64_t*)0x2000000005e0 = 0x200000000580; + *(uint64_t*)0x2000000005e8 = 0x19; + *(uint32_t*)0x2000000005f0 = 0; + syscall(SYS_recvmsg, /*fd=*/r[0], /*msg=*/0x2000000005c0ul, + /*f=MSG_DONTWAIT*/ 0x80ul); + 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; + for (procid = 0; procid < 4; procid++) { + if (fork() == 0) { + do_sandbox_none(); + } + } + sleep(1000000); + return 0; +} +EOF +mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -pthread || exit 1 + +work=/tmp/$prog.dir +rm -rf $work +mkdir $work +cd /tmp/$prog.dir +kldstat | grep -q sctp || { kldload sctp.ko && loaded=1; } +timeout 3m /tmp/$prog > /dev/null 2>&1 + +rm -rf /tmp/$prog /tmp/$prog.c /tmp/$prog.core $work +[ $loaded ] && kldunload sctp.ko +exit 0 |