Date: Thu, 9 Sep 2021 07:31:10 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: f2c9a8b9d95d - main - stress2: Add a syzkaller reproducer Message-ID: <202109090731.1897VAdP076667@gitrepo.freebsd.org>
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The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=f2c9a8b9d95de2b2aefd9e2067cf77fb1378ea7e commit f2c9a8b9d95de2b2aefd9e2067cf77fb1378ea7e Author: Peter Holm <pho@FreeBSD.org> AuthorDate: 2021-09-09 07:30:47 +0000 Commit: Peter Holm <pho@FreeBSD.org> CommitDate: 2021-09-09 07:30:47 +0000 stress2: Add a syzkaller reproducer --- tools/test/stress2/misc/syzkaller44.sh | 91 ++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) diff --git a/tools/test/stress2/misc/syzkaller44.sh b/tools/test/stress2/misc/syzkaller44.sh new file mode 100755 index 000000000000..625891f45925 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller44.sh @@ -0,0 +1,91 @@ +#!/bin/sh + +# panic: __rw_wlock_hard: recursing but non-recursive rw sctp-info @ /usr/src/sys/netinet/sctp_pcb.c:1856 +# cpuid = 10 +# time = 1631108444 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe065f32e7f0 +# vpanic() at vpanic+0x187/frame 0xfffffe065f32e850 +# panic() at panic+0x43/frame 0xfffffe065f32e8b0 +# __rw_wlock_hard() at __rw_wlock_hard+0x7d1/frame 0xfffffe065f32e960 +# _rw_wlock_cookie() at _rw_wlock_cookie+0xb7/frame 0xfffffe065f32e9a0 +# sctp_swap_inpcb_for_listen() at sctp_swap_inpcb_for_listen+0x7f/frame 0xfffffe065f32e9f0 +# sctp_listen() at sctp_listen+0x248/frame 0xfffffe065f32ea60 +# solisten() at solisten+0x42/frame 0xfffffe065f32ea80 +# kern_listen() at kern_listen+0x7d/frame 0xfffffe065f32eac0 +# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe065f32ebf0 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe065f32ebf0 +# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x800380a4a, rsp = 0x7fffffffe9b8, rbp = 0x7fffffffe9d0 --- +# KDB: enter: panic +# [ thread pid 26683 tid 924765 ] +# Stopped at kdb_enter+0x37: movq $0,0x12724de(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n249253-4ccbbe5f0689: Wed Sep 8 07:26:48 CEST 2021 +# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012 +# db> + +# Fixed by 6e3af6321ba4 - main - sctp: Fix lock recursion in sctp_swap_inpcb_for_listen() + +[ `uname -p` != "amd64" ] && exit 0 +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +cat > /tmp/syzkaller44.c <<EOF +// https://syzkaller.appspot.com/bug?id=367509f8fdee02c7d5a6c24b77eb2643792ef376 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+a1b6cef257ad145b7187@syzkaller.appspotmail.com + +#define _GNU_SOURCE + +#include <pwd.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 <unistd.h> + +uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; + +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + intptr_t res = 0; + res = syscall(SYS_socket, 0x1cul, 1ul, 0x84); + if (res != -1) + r[0] = res; + *(uint32_t*)0x20000140 = 0; + syscall(SYS_setsockopt, r[0], 0x84, 0x1c, 0x20000140ul, 4ul); + *(uint8_t*)0x20000080 = 0x46; + *(uint8_t*)0x20000081 = 0x1c; + *(uint16_t*)0x20000082 = htobe16(0x4e22); + *(uint32_t*)0x20000084 = 0; + memset((void*)0x20000088, 0, 16); + *(uint32_t*)0x20000098 = 0; + syscall(SYS_bind, r[0], 0x20000080ul, 0x1cul); + res = syscall(SYS_socket, 0x1cul, 1ul, 0x84); + if (res != -1) + r[1] = res; + *(uint32_t*)0x20000140 = 0; + syscall(SYS_setsockopt, r[1], 0x84, 0x1c, 0x20000140ul, 4ul); + *(uint8_t*)0x20000080 = 0x46; + *(uint8_t*)0x20000081 = 0x1c; + *(uint16_t*)0x20000082 = htobe16(0x4e22); + *(uint32_t*)0x20000084 = 0; + memset((void*)0x20000088, 0, 16); + *(uint32_t*)0x20000098 = 0; + syscall(SYS_bind, r[1], 0x20000080ul, 0x1cul); + syscall(SYS_listen, r[1], 0); + return 0; +} +EOF +mycc -o /tmp/syzkaller44 -Wall -Wextra -O0 /tmp/syzkaller44.c || exit 1 + +kldstat -v | grep -q sctp || kldload sctp.ko +(cd /tmp; timeout 3m ./syzkaller44) + +rm -rf /tmp/syzkaller44 /tmp/syzkaller44.c /tmp/syzkaller.* +exit 0
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