109 lines
3.8 KiB
Bash
Executable File
109 lines
3.8 KiB
Bash
Executable File
#!/bin/sh
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# Fatal trap 12: page fault while in kernel mode
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# cpuid = 0; apic id = 00
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# fault virtual address = 0x70
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# fault code = supervisor read data, page not present
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# instruction pointer = 0x20:0xffffffff80dec3cf
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# stack pointer = 0x28:0xfffffe013c9384d0
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# frame pointer = 0x28:0xfffffe013c938510
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# code segment = base 0x0, limit 0xfffff, type 0x1b
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# = DPL 0, pres 1, long 1, def32 0, gran 1
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# processor eflags = interrupt enabled, resume, IOPL = 0
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# current process = 58092 (syzkaller20)
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# trap number = 12
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# panic: page fault
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# cpuid = 0
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# time = 1596109014
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe013c938180
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# vpanic() at vpanic+0x182/frame 0xfffffe013c9381d0
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# panic() at panic+0x43/frame 0xfffffe013c938230
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# trap_fatal() at trap_fatal+0x387/frame 0xfffffe013c938290
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# trap_pfault() at trap_pfault+0x99/frame 0xfffffe013c9382f0
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# trap() at trap+0x2a5/frame 0xfffffe013c938400
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# calltrap() at calltrap+0x8/frame 0xfffffe013c938400
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# --- trap 0xc, rip = 0xffffffff80dec3cf, rsp = 0xfffffe013c9384d0, rbp = 0xfffffe013c938510 ---
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# in6_setscope() at in6_setscope+0x5f/frame 0xfffffe013c938510
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# ip6_output() at ip6_output+0x103c/frame 0xfffffe013c938750
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# udp6_send() at udp6_send+0x79b/frame 0xfffffe013c938900
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# sosend_dgram() at sosend_dgram+0x34e/frame 0xfffffe013c938960
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# sosend() at sosend+0x66/frame 0xfffffe013c938990
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# kern_sendit() at kern_sendit+0x246/frame 0xfffffe013c938a30
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# sendit() at sendit+0x1d8/frame 0xfffffe013c938a80
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# sys_sendto() at sys_sendto+0x4d/frame 0xfffffe013c938ad0
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# amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe013c938bf0
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# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe013c938bf0
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x80045513a, rsp = 0x7fffffffe568, rbp = 0x7fffffffe580 ---
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# KDB: enter: panic
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# [ thread pid 58092 tid 100337 ]
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# Stopped at kdb_enter+0x37: movq $0,0x10b8de6(%rip)
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# db> x/s version
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# version: FreeBSD 13.0-CURRENT #0 r363687: Thu Jul 30 08:55:21 CEST 2020
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# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO
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# db>
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[ `uname -p` != "amd64" ] && exit 0
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. ../default.cfg
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cat > /tmp/syzkaller20.c <<EOF
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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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, 0);
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if (res != -1)
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r[0] = res;
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res = syscall(SYS_socket, 0x1cul, 2ul, 0x88);
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if (res != -1)
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r[1] = res;
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syscall(SYS_dup2, r[1], r[0]);
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*(uint8_t*)0x20000000 = 0x1c;
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*(uint8_t*)0x20000001 = 0x1c;
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*(uint16_t*)0x20000002 = htobe16(0x4e21);
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*(uint32_t*)0x20000004 = 0;
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*(uint64_t*)0x20000008 = htobe64(0);
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*(uint64_t*)0x20000010 = htobe64(1);
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*(uint32_t*)0x20000018 = 0;
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syscall(SYS_bind, r[0], 0x20000000ul, 0x1cul);
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*(uint8_t*)0x200002c0 = 0x1c;
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*(uint8_t*)0x200002c1 = 0x1c;
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*(uint16_t*)0x200002c2 = htobe16(0x4e23);
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*(uint32_t*)0x200002c4 = 0;
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memcpy((void*)0x200002c8,
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"\xff\x71\x4e\x39\x01\x68\x0f\x3c\xd3\x1d\xb7\x61\x2c\x26\x8b\xac",
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16);
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*(uint32_t*)0x200002d8 = 0;
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syscall(SYS_sendto, r[0], 0ul, 0ul, 0ul, 0x200002c0ul, 0x1cul);
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return 0;
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}
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EOF
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mycc -o /tmp/syzkaller20 -Wall -Wextra -O2 /tmp/syzkaller20.c -lpthread ||
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exit 1
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(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
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(cd /tmp; ./syzkaller20) &
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sleep 60
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pkill -9 syzkaller20 swap
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wait
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rm -f /tmp/syzkaller20 /tmp/syzkaller20.c /tmp/syzkaller20.core
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exit 0
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