103 lines
3.4 KiB
Bash
Executable File
103 lines
3.4 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 = 0x18
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# fault code = supervisor read data, page not present
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# instruction pointer = 0x20:0xffffffff80ffe995
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# stack pointer = 0x28:0xfffffe0015e1d6f0
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# frame pointer = 0x28:0xfffffe0015e1d720
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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 = 744 (syz-executor7538254)
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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 = 1575776142
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0015e1d2f0
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# vpanic() at vpanic+0x1c7/frame 0xfffffe0015e1d360
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# panic() at panic+0x43/frame 0xfffffe0015e1d3c0
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# trap_fatal() at trap_fatal+0x4cc/frame 0xfffffe0015e1d440
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# trap_pfault() at trap_pfault+0xdc/frame 0xfffffe0015e1d4e0
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# trap() at trap+0x441/frame 0xfffffe0015e1d620
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# calltrap() at calltrap+0x8/frame 0xfffffe0015e1d620
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# --- trap 0xc, rip = 0xffffffff80ffe995, rsp = 0xfffffe0015e1d6f0, rbp = 0xfffffe0015e1d720 ---
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# __mtx_assert() at __mtx_assert+0x85/frame 0xfffffe0015e1d720
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# uipc_send() at uipc_send+0xeec/frame 0xfffffe0015e1d810
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# sosend_generic() at sosend_generic+0x707/frame 0xfffffe0015e1d8d0
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# sosend() at sosend+0xc6/frame 0xfffffe0015e1d940
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# kern_sendit() at kern_sendit+0x32d/frame 0xfffffe0015e1d9f0
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# sendit() at sendit+0x226/frame 0xfffffe0015e1da50
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# sys_sendmsg() at sys_sendmsg+0x8b/frame 0xfffffe0015e1dab0
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# amd64_syscall() at amd64_syscall+0x46d/frame 0xfffffe0015e1dbf0
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# fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0015e1dbf0
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c3ea, rsp = 0x7fffffffeb98, rbp = 0x7fffffffebf0 ---
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# Reproduced on r359818
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# Fixed by r359893
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[ `uname -p` = "i386" ] && exit 0
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. ../default.cfg
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cat > /tmp/syzkaller9.c <<EOF
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// http://syzkaller.backtrace.io:8080/report?id=03a08d05681c3e7f38ab6ab3f0d025105c3dcea3
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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, 3ul, 0x1012ul, -1, 0ul);
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intptr_t res = 0;
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res = syscall(SYS_socket, 1ul, 5ul, 0ul);
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if (res != -1)
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r[0] = res;
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memcpy((void*)0x20000000, "\x1d\x01\x2e\x2f\x66\x69\x6c\x65\x30\x00", 10);
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syscall(SYS_bind, r[0], 0x20000000ul, 0xaul);
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syscall(SYS_listen, r[0], 0);
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res = syscall(SYS_socket, 1ul, 5ul, 0ul);
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if (res != -1)
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r[1] = res;
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*(uint64_t*)0x20002640 = 0x20000000;
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*(uint8_t*)0x20000000 = 0xa;
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*(uint8_t*)0x20000001 = 1;
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memcpy((void*)0x20000002, "./file0\000", 8);
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*(uint32_t*)0x20002648 = 0xa;
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*(uint64_t*)0x20002650 = 0;
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*(uint64_t*)0x20002658 = 0;
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*(uint64_t*)0x20002660 = 0x20002580;
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memcpy((void*)0x20002580,
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"\x10\x00\x00\x00\xff\xff\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00",
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16);
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*(uint64_t*)0x20002668 = 0x10;
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*(uint32_t*)0x20002670 = 0;
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syscall(SYS_sendmsg, r[1], 0x20002640ul, 0ul);
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return 0;
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}
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EOF
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mycc -o /tmp/syzkaller9 -Wall -Wextra -O2 /tmp/syzkaller9.c -lpthread ||
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exit 1
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(cd /tmp; ./syzkaller9) &
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sleep 60
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pkill -9 syzkaller9
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wait
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rm -f /tmp/syzkaller9 /tmp/syzkaller9.c /tmp/syzkaller9.core /tmp/file0
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exit 0
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