From owner-dev-commits-src-all@freebsd.org Sun Apr 18 05:22:49 2021 Return-Path: Delivered-To: dev-commits-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id DA6F45F10A4; Sun, 18 Apr 2021 05:22:49 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FNJHY5m23z4Tgt; Sun, 18 Apr 2021 05:22:49 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B872525F47; Sun, 18 Apr 2021 05:22:49 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 13I5MndU060136; Sun, 18 Apr 2021 05:22:49 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 13I5MnAr060135; Sun, 18 Apr 2021 05:22:49 GMT (envelope-from git) Date: Sun, 18 Apr 2021 05:22:49 GMT Message-Id: <202104180522.13I5MnAr060135@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: 7f014be5eace - main - stress2: Added a syzkaller reproducer. A variation of syzkaller32.sh 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: 7f014be5eaceffd16f194e9c3b585fe194fb189f Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Apr 2021 05:22:49 -0000 The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=7f014be5eaceffd16f194e9c3b585fe194fb189f commit 7f014be5eaceffd16f194e9c3b585fe194fb189f Author: Peter Holm AuthorDate: 2021-04-18 05:19:07 +0000 Commit: Peter Holm CommitDate: 2021-04-18 05:19:07 +0000 stress2: Added a syzkaller reproducer. A variation of syzkaller32.sh --- tools/test/stress2/misc/all.exclude | 1 + tools/test/stress2/misc/syzkaller33.sh | 142 +++++++++++++++++++++++++++++++++ 2 files changed, 143 insertions(+) diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude index 1c5926ac9447..50e4d0ecc77b 100644 --- a/tools/test/stress2/misc/all.exclude +++ b/tools/test/stress2/misc/all.exclude @@ -71,6 +71,7 @@ syzkaller29.sh May change policy for random threads to to domainset_fixed 20210 syzkaller30.sh May change policy for random threads to to domainset_fixed 20210104 syzkaller31.sh panic: Bad tailq NEXT(0xfffffe0079608f00->tqh_last) != NULL 20210322 syzkaller32.sh Fatal trap 18: integer divide fault while in kernel mode 20210322 +syzkaller33.sh Fatal trap 18: integer divide fault while in kernel mode 20210418 truss3.sh WiP 20200915 unionfs.sh insmntque: non-locked vp: xx is not exclusive locked... 20130909 unionfs2.sh insmntque: mp-safe fs and non-locked vp is not ... 20111219 diff --git a/tools/test/stress2/misc/syzkaller33.sh b/tools/test/stress2/misc/syzkaller33.sh new file mode 100755 index 000000000000..c416d0cde1e4 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller33.sh @@ -0,0 +1,142 @@ +#!/bin/sh + +# Fatal trap 18: integer divide fault while in kernel mode +# cpuid = 0; apic id = 00 +# instruction pointer = 0x20:0xffffffff80c310ee +# stack pointer = 0x28:0xfffffe0131a629e0 +# frame pointer = 0x28:0xfffffe0131a62a30 +# 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 = 1618722013 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131a626f0 +# vpanic() at vpanic+0x181/frame 0xfffffe0131a62740 +# panic() at panic+0x43/frame 0xfffffe0131a627a0 +# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131a62800 +# trap() at trap+0xa4/frame 0xfffffe0131a62910 +# calltrap() at calltrap+0x8/frame 0xfffffe0131a62910 +# --- trap 0x12, rip = 0xffffffff80c310ee, rsp = 0xfffffe0131a629e0, rbp = 0xfffffe0131a62a30 --- +# realtimer_expire_l() at realtimer_expire_l+0xee/frame 0xfffffe0131a62a30 +# softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe0131a62b00 +# softclock() at softclock+0x66/frame 0xfffffe0131a62b20 +# ithread_loop() at ithread_loop+0x279/frame 0xfffffe0131a62bb0 +# fork_exit() at fork_exit+0x80/frame 0xfffffe0131a62bf0 +# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131a62bf0 +# --- trap 0, rip = 0, rsp = 0, rbp = 0 --- +# KDB: enter: panic +# [ thread pid 12 tid 100161 ] +# Stopped at kdb_enter+0x37: movq $0,0x1283f9e(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n246123-21afed4b1d1-dirty: Sat Apr 17 07:39:42 CEST 2021 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO +# db> + +[ `uname -p` != "amd64" ] && exit 0 + +../default.cfg +cat > /tmp/syzkaller33.c < + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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 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_one(void) +{ + intptr_t res = 0; + res = syscall(SYS_ktimer_create, 0ul, 0ul, 0x200011c0ul); + if (res != -1) + r[0] = *(uint32_t*)0x200011c0; + *(uint64_t*)0x20001200 = 0x800000000000000; + *(uint64_t*)0x20001208 = 0; + *(uint64_t*)0x20001210 = 0; + *(uint64_t*)0x20001218 = 0xa2b; + syscall(SYS_ktimer_settime, r[0], 1ul, 0x20001200ul, 0ul); +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller33 -Wall -Wextra -O0 /tmp/syzkaller33.c || + exit 1 + +(cd /tmp; timeout 3m ./syzkaller33) + +rm -rf /tmp/syzkaller33 syzkaller33.c /tmp/syzkaller.* +exit 0