Index: user/pho/stress2/misc/syzkaller21.sh =================================================================== --- user/pho/stress2/misc/syzkaller21.sh (nonexistent) +++ user/pho/stress2/misc/syzkaller21.sh (revision 363901) @@ -0,0 +1,405 @@ +#!/bin/sh + +# $ pgrep syzkaller21 | xargs ps -lHp +# UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND +# 0 3891 1 0 20 0 29828 2852 - T 0 0:00,14 ./syzkaller21 +# 0 3891 1 0 52 0 29828 2852 ufs T 0 0:00,00 ./syzkaller21 +# 0 3891 1 0 52 0 29828 2852 ufs T 0 0:00,00 ./syzkaller21 +# $ pgrep syzkaller21 | xargs procstat -k +# PID TID COMM TDNAME KSTACK +# 3891 100250 syzkaller21 - mi_switch thread_suspend_switch thread_single exit1 sys_sys_exit amd64_syscall fast_syscall_common +# 3891 100777 syzkaller21 - mi_switch sleepq_switch sleeplk lockmgr_xlock_hard ffs_lock VOP_LOCK1_APV _vn_lock vget_finish vfs_hash_get ffs_vgetf softdep_sync_buf ffs_syncvnode ffs_fsync VOP_FSYNC_APV kern_fsync amd64_syscall fast_syscall_common +# 3891 100778 syzkaller21 - mi_switch sleepq_switch sleeplk lockmgr_slock_hard ffs_lock VOP_LOCK1_APV _vn_lock vget_finish cache_lookup vfs_cache_lookup VOP_LOOKUP_APV lookup namei kern_chdir amd64_syscall fast_syscall_common +# $ uname -a +# FreeBSD t2.osted.lan 13.0-CURRENT FreeBSD 13.0-CURRENT #5 r363786M: Tue Aug 4 16:51:52 CEST 2020 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO amd64 +# $ + +# $FreeBSD$ + +[ `uname -p` != "amd64" ] && exit 0 + +. ../default.cfg +cat > /tmp/syzkaller21.c < + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static __thread int skip_segv; +static __thread jmp_buf segv_env; + +static void segv_handler(int sig, siginfo_t* info, void* ctx __unused) +{ + uintptr_t addr = (uintptr_t)info->si_addr; + const uintptr_t prog_start = 1 << 20; + const uintptr_t prog_end = 100 << 20; + if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && + (addr < prog_start || addr > prog_end)) { + _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(...) \ + { \ + __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ + if (_setjmp(segv_env) == 0) { \ + __VA_ARGS__; \ + } \ + __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ + } + +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 remove_dir(const char* dir) +{ + DIR* dp; + struct dirent* ep; + dp = opendir(dir); + if (dp == NULL) + exit(1); + 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)) + exit(1); + } + closedir(dp); + if (rmdir(dir)) + 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; + for (i = 0; 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 execute_one(void) +{ + int i, call, thread; + int collide = 0; +again: + for (call = 0; call < 9; 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 (collide && (call % 2) == 0) + break; + event_timedwait(&th->done, 45); + break; + } + } + for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) + sleep_ms(1); + if (!collide) { + collide = 1; + goto again; + } +} + +static void execute_one(void); + +#define WAIT_FLAGS 0 + +static void loop(void) +{ + int iter; + for (iter = 0;; 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 < 5 * 1000) + continue; + kill_and_wait(pid, &status); + break; + } + remove_dir(cwdbuf); + } +} + +uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, + 0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + NONFAILING(memcpy((void*)0x20000000, ".\000", 2)); + res = syscall(SYS_open, 0x20000000ul, 0ul, 0ul); + if (res != -1) + r[0] = res; + break; + case 1: + NONFAILING(memcpy((void*)0x20000040, "./file0\000", 8)); + syscall(SYS_mkdirat, r[0], 0x20000040ul, 0ul); + break; + case 2: + NONFAILING(memcpy((void*)0x20000000, ".\000", 2)); + res = syscall(SYS_open, 0x20000000ul, 0ul, 0ul); + if (res != -1) + r[1] = res; + break; + case 3: + NONFAILING(memcpy((void*)0x20000040, "./file1\000", 8)); + syscall(SYS_mkdirat, r[1], 0x20000040ul, 0ul); + break; + case 4: + NONFAILING(memcpy((void*)0x20000000, ".\000", 2)); + res = syscall(SYS_open, 0x20000000ul, 0ul, 0ul); + if (res != -1) + r[2] = res; + break; + case 5: + NONFAILING(memcpy((void*)0x20000080, "./file1\000", 8)); + NONFAILING(memcpy((void*)0x200000c0, "./file0/file0\000", 14)); + syscall(SYS_renameat, r[1], 0x20000080ul, r[2], 0x200000c0ul); + break; + case 6: + NONFAILING(memcpy((void*)0x20000100, "./file0/file0\000", 14)); + res = syscall(SYS_open, 0x20000100ul, 0ul, 0ul); + if (res != -1) + r[3] = res; + break; + case 7: + syscall(SYS_fsync, r[3]); + break; + case 8: + NONFAILING(memcpy((void*)0x20000140, "./file0/file0\000", 14)); + syscall(SYS_chdir, 0x20000140ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + install_segv_handler(); + use_temporary_dir(); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller21 -Wall -Wextra -O2 /tmp/syzkaller21.c -lpthread || + exit 1 + +(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) & +(cd /tmp; ./syzkaller21) & +sleep 60 +while pkill swap; do sleep .2; done +pkill -9 syzkaller21 +sleep .5 +if pgrep -q syzkaller21; then + pgrep syzkaller21 | xargs ps -lHp + pgrep syzkaller21 | xargs procstat -k + exit 1 +fi +wait + +rm -rf /tmp/syzkaller21.* +rm -f /tmp/syzkaller21 +exit 0 Property changes on: user/pho/stress2/misc/syzkaller21.sh ___________________________________________________________________ Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property