92 lines
3.2 KiB
Bash
Executable File
92 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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# panic: __rw_wlock_hard: recursing but non-recursive rw sctp-info @ /usr/src/sys/netinet/sctp_pcb.c:1856
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# cpuid = 10
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# time = 1631108444
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe065f32e7f0
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# vpanic() at vpanic+0x187/frame 0xfffffe065f32e850
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# panic() at panic+0x43/frame 0xfffffe065f32e8b0
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# __rw_wlock_hard() at __rw_wlock_hard+0x7d1/frame 0xfffffe065f32e960
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# _rw_wlock_cookie() at _rw_wlock_cookie+0xb7/frame 0xfffffe065f32e9a0
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# sctp_swap_inpcb_for_listen() at sctp_swap_inpcb_for_listen+0x7f/frame 0xfffffe065f32e9f0
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# sctp_listen() at sctp_listen+0x248/frame 0xfffffe065f32ea60
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# solisten() at solisten+0x42/frame 0xfffffe065f32ea80
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# kern_listen() at kern_listen+0x7d/frame 0xfffffe065f32eac0
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# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe065f32ebf0
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# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe065f32ebf0
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x800380a4a, rsp = 0x7fffffffe9b8, rbp = 0x7fffffffe9d0 ---
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# KDB: enter: panic
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# [ thread pid 26683 tid 924765 ]
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# Stopped at kdb_enter+0x37: movq $0,0x12724de(%rip)
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# db> x/s version
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# version: FreeBSD 14.0-CURRENT #0 main-n249253-4ccbbe5f0689: Wed Sep 8 07:26:48 CEST 2021
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# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
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# db>
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# Fixed by 6e3af6321ba4 - main - sctp: Fix lock recursion in sctp_swap_inpcb_for_listen()
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[ `uname -p` != "amd64" ] && exit 0
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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cat > /tmp/syzkaller44.c <<EOF
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// https://syzkaller.appspot.com/bug?id=367509f8fdee02c7d5a6c24b77eb2643792ef376
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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// Reported-by: syzbot+a1b6cef257ad145b7187@syzkaller.appspotmail.com
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#define _GNU_SOURCE
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/endian.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
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int main(void)
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{
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syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
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intptr_t res = 0;
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res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
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if (res != -1)
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r[0] = res;
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*(uint32_t*)0x20000140 = 0;
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syscall(SYS_setsockopt, r[0], 0x84, 0x1c, 0x20000140ul, 4ul);
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*(uint8_t*)0x20000080 = 0x46;
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*(uint8_t*)0x20000081 = 0x1c;
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*(uint16_t*)0x20000082 = htobe16(0x4e22);
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*(uint32_t*)0x20000084 = 0;
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memset((void*)0x20000088, 0, 16);
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*(uint32_t*)0x20000098 = 0;
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syscall(SYS_bind, r[0], 0x20000080ul, 0x1cul);
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res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
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if (res != -1)
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r[1] = res;
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*(uint32_t*)0x20000140 = 0;
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syscall(SYS_setsockopt, r[1], 0x84, 0x1c, 0x20000140ul, 4ul);
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*(uint8_t*)0x20000080 = 0x46;
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*(uint8_t*)0x20000081 = 0x1c;
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*(uint16_t*)0x20000082 = htobe16(0x4e22);
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*(uint32_t*)0x20000084 = 0;
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memset((void*)0x20000088, 0, 16);
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*(uint32_t*)0x20000098 = 0;
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syscall(SYS_bind, r[1], 0x20000080ul, 0x1cul);
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syscall(SYS_listen, r[1], 0);
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return 0;
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}
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EOF
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mycc -o /tmp/syzkaller44 -Wall -Wextra -O0 /tmp/syzkaller44.c || exit 1
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kldstat -v | grep -q sctp || kldload sctp.ko
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(cd /tmp; timeout 3m ./syzkaller44)
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rm -rf /tmp/syzkaller44 /tmp/syzkaller44.c /tmp/syzkaller.*
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exit 0
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