Date: Mon, 22 Mar 2021 10:27:40 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: 6d5586da633b - main - stress2: Added two syzkaller reproducers. Message-ID: <202103221027.12MARe2Z017321@gitrepo.freebsd.org>
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The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=6d5586da633bc76d02010ef73c9be768de98966c commit 6d5586da633bc76d02010ef73c9be768de98966c Author: Peter Holm <pho@FreeBSD.org> AuthorDate: 2021-03-22 10:26:39 +0000 Commit: Peter Holm <pho@FreeBSD.org> CommitDate: 2021-03-22 10:26:39 +0000 stress2: Added two syzkaller reproducers. --- tools/test/stress2/misc/syzkaller31.sh | 324 +++++++++++++++++++++++++++++++++ tools/test/stress2/misc/syzkaller32.sh | 299 ++++++++++++++++++++++++++++++ 2 files changed, 623 insertions(+) diff --git a/tools/test/stress2/misc/syzkaller31.sh b/tools/test/stress2/misc/syzkaller31.sh new file mode 100755 index 000000000000..af93a89a127c --- /dev/null +++ b/tools/test/stress2/misc/syzkaller31.sh @@ -0,0 +1,324 @@ +#!/bin/sh + +# panic: Bad tailq NEXT(0xfffffe0079608f00->tqh_last) != NULL +# cpuid = 20 +# time = 1616404997 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01af6d8580 +# vpanic() at vpanic+0x181/frame 0xfffffe01af6d85d0 +# panic() at panic+0x43/frame 0xfffffe01af6d8630 +# sctp_ss_default_add() at sctp_ss_default_add+0xd7/frame 0xfffffe01af6d8660 +# sctp_lower_sosend() at sctp_lower_sosend+0x3b24/frame 0xfffffe01af6d8830 +# sctp_sosend() at sctp_sosend+0x344/frame 0xfffffe01af6d8950 +# sosend() at sosend+0x66/frame 0xfffffe01af6d8980 +# kern_sendit() at kern_sendit+0x1ec/frame 0xfffffe01af6d8a10 +# sendit() at sendit+0x1db/frame 0xfffffe01af6d8a60 +# sys_sendmsg() at sys_sendmsg+0x61/frame 0xfffffe01af6d8ac0 +# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe01af6d8bf0 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01af6d8bf0 +# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003b042a, rsp = 0x7fffdffdcf68, rbp = 0x7fffdffdcf90 --- +# KDB: enter: panic +# [ thread pid 7402 tid 730532 ] +# Stopped at kdb_enter+0x37: movq $0,0x1286f8e(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012 +# db> + +[ `uname -p` != "amd64" ] && exit 0 + +. ../default.cfg +kldstat -v | grep -q sctp || kldload sctp.ko + +cat > /tmp/syzkaller31.c <<EOF +// https://syzkaller.appspot.com/bug?id=57c78914e36b822eaa173cfd681e4f63822e0844 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+ed6e8de942351d0309f4@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/syscall.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +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; +} + +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 < 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); + if (collide && (call % 2) == 0) + break; + event_timedwait(&th->done, 50); + 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 = 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 (;;) { + 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; + } + } +} + +uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + res = syscall(SYS_socket, 2ul, 5ul, 0x84); + if (res != -1) + r[0] = res; + break; + case 1: + res = syscall(SYS_fcntl, r[0], 0ul, r[0]); + if (res != -1) + r[1] = res; + break; + case 2: + *(uint64_t*)0x20000040 = 0x20000000; + *(uint8_t*)0x20000000 = 0x1c; + *(uint8_t*)0x20000001 = 0x1c; + *(uint16_t*)0x20000002 = htobe16(0x4e22); + *(uint32_t*)0x20000004 = 0; + *(uint8_t*)0x20000008 = 0; + *(uint8_t*)0x20000009 = 0; + *(uint8_t*)0x2000000a = 0; + *(uint8_t*)0x2000000b = 0; + *(uint8_t*)0x2000000c = 0; + *(uint8_t*)0x2000000d = 0; + *(uint8_t*)0x2000000e = 0; + *(uint8_t*)0x2000000f = 0; + *(uint8_t*)0x20000010 = 0; + *(uint8_t*)0x20000011 = 0; + *(uint8_t*)0x20000012 = -1; + *(uint8_t*)0x20000013 = -1; + *(uint32_t*)0x20000014 = htobe32(0x203); + *(uint32_t*)0x20000018 = 0; + *(uint32_t*)0x20000048 = 0x1c; + *(uint64_t*)0x20000050 = 0x20000100; + *(uint64_t*)0x20000100 = 0x20000080; + memcpy((void*)0x20000080, "\000", 1); + *(uint64_t*)0x20000108 = 1; + *(uint32_t*)0x20000058 = 1; + *(uint64_t*)0x20000060 = 0x20000200; + memcpy( + (void*)0x20000200, + "\x1c\x00\x00\x00\x84\x00\x00\x00\x01\x00\x00\x00\x40\x08\xec\x70\xa0", + 17); + *(uint32_t*)0x20000068 = 0x1c; + *(uint32_t*)0x2000006c = 0; + syscall(SYS_sendmsg, r[1], 0x20000040ul, 0ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller31 -Wall -Wextra -O0 /tmp/syzkaller31.c -lpthread || + exit 1 + +(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) & +(cd /tmp; timeout 3m ./syzkaller31) +while pkill swap; do :; done +wait + +rm -rf /tmp/syzkaller31 syzkaller31.c /tmp/syzkaller.* +exit 0 diff --git a/tools/test/stress2/misc/syzkaller32.sh b/tools/test/stress2/misc/syzkaller32.sh new file mode 100755 index 000000000000..a95871969d5c --- /dev/null +++ b/tools/test/stress2/misc/syzkaller32.sh @@ -0,0 +1,299 @@ +#!/bin/sh + +# Fatal trap 18: integer divide fault while in kernel mode +# cpuid = 0; apic id = 00 +# instruction pointer = 0x20:0xffffffff80c2f828 +# stack pointer = 0x0:0xfffffe0131a5d9e0 +# frame pointer = 0x0:0xfffffe0131a5da30 +# 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 (swi4: clock (0)) +# trap number = 18 +# panic: integer divide fault +# cpuid = 0 +# time = 1616401924 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131a5d6f0 +# vpanic() at vpanic+0x181/frame 0xfffffe0131a5d740 +# panic() at panic+0x43/frame 0xfffffe0131a5d7a0 +# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131a5d800 +# trap() at trap+0xa4/frame 0xfffffe0131a5d910 +# calltrap() at calltrap+0x8/frame 0xfffffe0131a5d910 +# --- trap 0x12, rip = 0xffffffff80c2f828, rsp = 0xfffffe0131a5d9e0, rbp = 0xfffffe0131a5da30 --- +# realtimer_expire() at realtimer_expire+0x1a8/frame 0xfffffe0131a5da30 +# softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe0131a5db00 +# softclock() at softclock+0x66/frame 0xfffffe0131a5db20 +# ithread_loop() at ithread_loop+0x279/frame 0xfffffe0131a5dbb0 +# fork_exit() at fork_exit+0x80/frame 0xfffffe0131a5dbf0 +# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131a5dbf0 +# --- trap 0, rip = 0, rsp = 0, rbp = 0 --- +# KDB: enter: panic +# [ thread pid 12 tid 100160 ] +# Stopped at kdb_enter+0x37: movq $0,0x1286f8e(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012 +# db> + +[ `uname -p` != "amd64" ] && exit 0 + +. ../default.cfg +cat > /tmp/syzkaller32.c <<EOF +// https://syzkaller.appspot.com/bug?id=02c1b7d91203fd30b386eb023d4a99d1494de733 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+157b74ff493140d86eac@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/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; +} + +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 < 2; 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 (;;) { + 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; + } + } +} + +uint64_t r[1] = {0x0}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + res = syscall(SYS_ktimer_create, 4ul, 0ul, 0x20000500ul); + if (res != -1) + r[0] = *(uint32_t*)0x20000500; + break; + case 1: + *(uint64_t*)0x20000100 = 0x200000000000000; + *(uint64_t*)0x20000108 = 0; + *(uint64_t*)0x20000110 = 0; + *(uint64_t*)0x20000118 = 0x10000; + syscall(SYS_ktimer_settime, r[0], 0ul, 0x20000100ul, 0ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + for (procid = 0; procid < 4; procid++) { + if (fork() == 0) { + loop(); + } + } + sleep(1000000); + return 0; +} +EOF +mycc -o /tmp/syzkaller32 -Wall -Wextra -O0 /tmp/syzkaller32.c -lpthread || + exit 1 + +(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) & +(cd /tmp; timeout 3m ./syzkaller32) +while pkill swap; do :; done +wait + +rm -rf /tmp/syzkaller32 syzkaller32.c /tmp/syzkaller.* +exit 0
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