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Tue, 11 Jul 2023 08:24:42 GMT (envelope-from git) Date: Tue, 11 Jul 2023 08:24:42 GMT Message-Id: <202307110824.36B8Ogx0044136@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Peter Holm Subject: git: 972e60da74aa - main - stress2: Added two syzkaller reproducers List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: pho X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 972e60da74aaf1d6244d3eb225ea06133655bc98 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=972e60da74aaf1d6244d3eb225ea06133655bc98 commit 972e60da74aaf1d6244d3eb225ea06133655bc98 Author: Peter Holm AuthorDate: 2023-07-11 08:24:19 +0000 Commit: Peter Holm CommitDate: 2023-07-11 08:24:19 +0000 stress2: Added two syzkaller reproducers --- tools/test/stress2/misc/syzkaller68.sh | 235 ++++++++++++++++ tools/test/stress2/misc/syzkaller69.sh | 494 +++++++++++++++++++++++++++++++++ 2 files changed, 729 insertions(+) diff --git a/tools/test/stress2/misc/syzkaller68.sh b/tools/test/stress2/misc/syzkaller68.sh new file mode 100755 index 000000000000..3d60af5215c5 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller68.sh @@ -0,0 +1,235 @@ +#!/bin/sh + +# panic: mutex Giant owned at ../../../kern/kern_thread.c:1409 +# cpuid = 0 +# time = 1688501618 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0171ba2510 +# vpanic() at vpanic+0x150/frame 0xfffffe0171ba2560 +# panic() at panic+0x43/frame 0xfffffe0171ba25c0 +# __mtx_assert() at __mtx_assert+0xc4/frame 0xfffffe0171ba25d0 +# thread_suspend_check() at thread_suspend_check+0x38/frame 0xfffffe0171ba2610 +# sig_intr() at sig_intr+0x78/frame 0xfffffe0171ba2640 +# fork1() at fork1+0x238/frame 0xfffffe0171ba26c0 +# kproc_create() at kproc_create+0x92/frame 0xfffffe0171ba2790 +# kproc_kthread_add() at kproc_kthread_add+0xdd/frame 0xfffffe0171ba28b0 +# zthr_create_timer() at zthr_create_timer+0x109/frame 0xfffffe0171ba2930 +# arc_init() at arc_init+0x1b44/frame 0xfffffe0171ba2970 +# dmu_init() at dmu_init+0x31/frame 0xfffffe0171ba2980 +# spa_init() at spa_init+0xed/frame 0xfffffe0171ba29a0 +# zfs_kmod_init() at zfs_kmod_init+0x1f/frame 0xfffffe0171ba29c0 +# zfs_modevent() at zfs_modevent+0module_register_init() at module_register_init+0xb0/frame 0xfffffe0171ba2a10 +# linker_load_module() at linker_load_module+0xbd2/frame 0xfffffe0171ba2d10 +# kern_kldload() at kern_kldload+0x16f/frame 0xfffffe0171ba2d60 +# vfs_byname_kld() at vfs_byname_kld+0x31/frame 0xfffffe0171ba2da0 +# sys_mount() at sys_mount+0xa9/frame 0xfffffe0171ba2e00 +# amd64_syscall() at amd64_syscall+0x150/frame 0xfffffe0171ba2f30 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0171ba2f30 +# --- syscall (0, FreeBSD ELF64, syscall), rip = 0x823f70e9a, rsp = 0x82513af78, rbp = 0x82513af90 KDB: enter: panic +# [ thread pid 43886 tid 178779 ] +# Stopped at kdb_enter+0x32: movq $0,0xde5863(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n263953-d7614c010c762: Tue Jul 4 19:29:44 CEST 2023 +# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO +# db> + +uname -p | grep -Eq "amd64|i386" || exit 0 +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +prog=$(basename "$0" .sh) +cat > /tmp/$prog.c < +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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; +} + +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 loop(void) +{ + int i, call, thread; + for (call = 0; call < 1; 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); +} + +void execute_call(int call) +{ + switch (call) { + case 0: + memcpy((void*)0x20000440, "zfs\000", 4); + syscall(SYS_mount, 0x20000440ul, 0ul, 0x8300648ul, 0ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1 + +(cd /tmp; timeout 2m ./$prog) + +rm -rf /tmp/$prog /tmp/$prog.c /tmp/syzkaller.* +exit 0 diff --git a/tools/test/stress2/misc/syzkaller69.sh b/tools/test/stress2/misc/syzkaller69.sh new file mode 100755 index 000000000000..fbaa3e5b9c9c --- /dev/null +++ b/tools/test/stress2/misc/syzkaller69.sh @@ -0,0 +1,494 @@ +#!/bin/sh + +# Fatal trap 12: page fault while in kernel mode +# cpuid = 6; apic id = 06 +# fault virtual address = 0xb8 +# fault code = supervisor read data, page not present +# instruction pointer = 0x20:0xffffffff80d3c17b +# stack pointer = 0x28:0xfffffe00e49fab80 +# frame pointer = 0x28:0xfffffe00e49facc0 +# code segment = base 0x0, limit 0xfffff, type 0x1b +# = DPL 0, pres 1, long 1, def32 0, gran 1 +# processor eflags = interrupt enabled, resume, IOPL = 0 +# current process = 12 (swi1: netisr 0) +# rdi: fffff802d2d8daa0 rsi: fffffe00e49fab48 rdx: ffffffff819d5a90 +# rcx: ffffffff819d5a98 r8: 00000000ffffffff r9: 0000000000000000 +# rax: 0000000000000000 rbx: 0000000000000002 rbp: fffffe00e49facc0 +# r10: fffff802d2d8daa0 r11: 0000000000010000 r12: 0000000000000000 +# r13: fffff802d2d8da80 r14: 0000000000000060 r15: fffff802d2d8dab8 +# trap number = 12 +# panic: page fault +# cpuid = 6 +# time = 1689053386 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e49fa930 +# vpanic() at vpanic+0x149/frame 0xfffffe00e49fa980 +# panic() at panic+0x43/frame 0xfffffe00e49fa9e0 +# trap_fatal() at trap_fatal+0x40c/frame 0xfffffe00e49faa40 +# trap_pfault() at trap_pfault+0xae/frame 0xfffffe00e49faab0 +# calltrap() at calltrap+0x8/frame 0xfffffe00e49faab0 +# --- trap 0xc, rip = 0xffffffff80d3c17b, rsp = 0xfffffe00e49fab80, rbp = 0xfffffe00e49facc0 --- +# tcp_input_with_port() at tcp_input_with_port+0x70b/frame 0xfffffe00e49facc0 +# tcp6_input_with_port() at tcp6_input_with_port+0x6a/frame 0xfffffe00e49facf0 +# tcp6_input() at tcp6_input+0xb/frame 0xfffffe00e49fad00 +# ip6_input() at ip6_input+0xc97/frame 0xfffffe00e49fade0 +# swi_net() at swi_net+0x19b/frame 0xfffffe00e49fae60 +# ithread_loop() at ithread_loop+0x266/frame 0xfffffe00e49faef0 +# fork_exit() at fork_exit+0x82/frame 0xfffffe00e49faf30 +# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e49faf30 +# --- trap 0, rip = 0, rsp = 0, rbp = 0 --- +# KDB: enter: panic +# [ thread pid 12 tid 100089 ] +# Stopped at kdb_enter+0x32: movq $0,0xde5053(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n264110-43ed91e00bbb1: Tue Jul 11 06:28:21 CEST 2023 +# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO +# db> + +uname -p | grep -Eq "amd64" || exit 0 +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +prog=$(basename "$0" .sh) +cat > /tmp/$prog.c < + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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) +{ + int i, call, thread; + for (call = 0; call < 7; 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); + if (call == 3) + break; + 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 (;;) { + 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); + } +} + +uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + res = syscall(SYS_socket, 0x1cul, 1ul, 0); + if (res != -1) + r[0] = res; + break; + case 1: + NONFAILING(*(uint32_t*)0x20000080 = 9); + syscall(SYS_setsockopt, r[0], 0xffff, 0x10000, 0x20000080ul, 4ul); + break; + case 2: + NONFAILING(*(uint8_t*)0x200000c0 = 0x1c); + NONFAILING(*(uint8_t*)0x200000c1 = 0x1c); + NONFAILING(*(uint16_t*)0x200000c2 = htobe16(0x4e20 + procid * 4)); + NONFAILING(*(uint32_t*)0x200000c4 = 0); + NONFAILING(memset((void*)0x200000c8, 0, 16)); + NONFAILING(*(uint32_t*)0x200000d8 = 0); + syscall(SYS_bind, r[0], 0x200000c0ul, 0x1cul); + break; + case 3: + NONFAILING(*(uint32_t*)0x20000080 = 9); + syscall(SYS_setsockopt, r[0], 0xffff, 0x10000, 0x20000080ul, 4ul); + break; + case 4: + NONFAILING(*(uint32_t*)0x20000040 = 0x72); + NONFAILING(*(uint8_t*)0x20000048 = 0x10); + NONFAILING(*(uint8_t*)0x20000049 = 2); + NONFAILING(*(uint16_t*)0x2000004a = htobe16(0x4e21 + procid * 4)); + NONFAILING(*(uint32_t*)0x2000004c = htobe32(0x7f000001)); + NONFAILING(memset((void*)0x20000050, 0, 8)); + NONFAILING(memset((void*)0x20000058, 0, 112)); + syscall(SYS_setsockopt, r[0], 0, 0x51, 0x20000040ul, 0x88ul); + break; + case 5: + res = syscall(SYS_socket, 0x1cul, 1ul, 0); + if (res != -1) + r[1] = res; + break; + case 6: + NONFAILING(*(uint8_t*)0x20000140 = 0x1c); + NONFAILING(*(uint8_t*)0x20000141 = 0x1c); + NONFAILING(*(uint16_t*)0x20000142 = htobe16(0x4e20 + procid * 4)); + NONFAILING(*(uint32_t*)0x20000144 = 0); + NONFAILING(memset((void*)0x20000148, 0, 16)); + NONFAILING(*(uint32_t*)0x20000158 = 0); + syscall(SYS_connect, r[1], 0x20000140ul, 0x1cul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + 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 -lpthread || exit 1 + +(cd ../testcases/swap; ./swap -t 2m -i 10 -l 100 > /dev/null 2>&1) & + +(cd /tmp; timeout 2m ./$prog) +wait + +rm -rf /tmp/$prog /tmp/$prog.c /tmp/syzkaller.* +exit 0