Date: Sat, 4 Oct 2025 08:21:34 GMT From: Peter Holm <pho@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 257a750c60f1 - main - stress2: Add syzkaller reproducers Message-ID: <202510040821.5948LYuc015138@gitrepo.freebsd.org>
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The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=257a750c60f14f83dff7bf5d2189089b1e74870b commit 257a750c60f14f83dff7bf5d2189089b1e74870b Author: Peter Holm <pho@FreeBSD.org> AuthorDate: 2025-10-04 08:20:37 +0000 Commit: Peter Holm <pho@FreeBSD.org> CommitDate: 2025-10-04 08:20:37 +0000 stress2: Add syzkaller reproducers --- tools/test/stress2/misc/all.exclude | 6 +- tools/test/stress2/misc/syzkaller84.sh | 402 ++++++++++++++++++++++++ tools/test/stress2/misc/syzkaller85.sh | 499 +++++++++++++++++++++++++++++ tools/test/stress2/misc/syzkaller86.sh | 555 +++++++++++++++++++++++++++++++++ 4 files changed, 1461 insertions(+), 1 deletion(-) diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude index f9b32db95799..0658bfdc0c1b 100644 --- a/tools/test/stress2/misc/all.exclude +++ b/tools/test/stress2/misc/all.exclude @@ -25,6 +25,7 @@ gnop13.sh https://people.freebsd.org/~pho/stress/log/log0386.txt 20221113 gnop7.sh Waiting for patch commit 20190820 gnop8.sh Waiting for patch commit 20201214 gnop9.sh Waiting for patch commit 20201214 +graid1_3.sh Hang seen 20250915 graid1_8.sh Known issue 20170909 graid1_9.sh panic: Bad effnlink 20180212 lockf5.sh Spinning threads seen 20160718 @@ -74,10 +75,13 @@ syzkaller67.sh panic: ASan: Invalid access, 8-byte read at ... 20230621 syzkaller80.sh panic 20250711 syzkaller81.sh panic 20250711 syzkaller82.sh panic: m_apply, length > size of mbuf chain 20250724 +syzkaller84.sh panic: Assertion !(sb->sb_state & SBS_CANTRCVMORE) 20250810 +syzkaller85.sh panic: Assertion uio->uio_resid < 0 failed 20250928 +syzkaller86.sh Fatal trap 12: page fault while in kernel mode 20251001 +write2.sh panic: sndbuf_acquire: count 255 > free 0 20251003 quota3.sh https://people.freebsd.org/~pho/stress/log/log0604.txt 20250728 quota6.sh https://people.freebsd.org/~pho/stress/log/log0456.txt 20240707 truss3.sh WiP 20200915 -zfs18.sh https://people.freebsd.org/~pho/stress/log/log0560.txt 20241118 zfs9.sh panic: sacked_bytes < 0 20250711 # Test not to run for other reasons: 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 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 diff --git a/tools/test/stress2/misc/syzkaller86.sh b/tools/test/stress2/misc/syzkaller86.sh new file mode 100755 index 000000000000..12922a2d05fa --- /dev/null +++ b/tools/test/stress2/misc/syzkaller86.sh @@ -0,0 +1,555 @@ +#!/bin/sh + +# Fatal trap 12: page fault while in kernel mode +# cpuid = 1; apic id = 01 +# fault virtual address = 0x18 +# fault code = supervisor read data, page not present +# instruction pointer = 0x20:0xffffffff80b69835 +# stack pointer = 0x28:0xfffffe00ff8e7d90 +# frame pointer = 0x28:0xfffffe00ff8e7d90 +# 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 = 0 (thread taskq) +# rdi: 0000000000000018 rsi: 0000000000000004 rdx: ffffffff812b3f65 +# rcx: 00000000000008ba r8: fffff800044b8780 r9: fffff80003397000 +# rax: 0000000000000001 rbx: fffff8004221fa00 rbp: fffffe00ff8e7d90 +# r10: 0000000000000001 r11: fffffe00dc47b000 r12: fffffe0177ed0000 +# r13: fffff800044b8780 r14: fffff8004221f800 r15: fffff8004221f800 +# trap number = 12 +# panic: page fault +# cpuid = 1 +# time = 1759322830 +# KDB: stack backtrace: *** 532 LINES SKIPPED ***
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