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tests/multiboot: Add tests for the a.out kludge
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Jack Schwartz <jack.schwartz@oracle.com> (cherry picked from commit 1c8c426) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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/* | ||
* Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com> | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
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.section multiboot | ||
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#define MB_MAGIC 0x1badb002 | ||
#define MB_FLAGS 0x10000 | ||
#define MB_CHECKSUM -(MB_MAGIC + MB_FLAGS) | ||
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.align 4 | ||
.int MB_MAGIC | ||
.int MB_FLAGS | ||
.int MB_CHECKSUM | ||
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#define LAST_BYTE_VALUE 0xa5 | ||
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/* | ||
* Order of fields in the a.out kludge header fields: | ||
* | ||
* header_addr | ||
* load_addr | ||
* load_end_addr | ||
* bss_end_addr | ||
* entry_addr | ||
*/ | ||
#if SCENARIO == 1 | ||
/* Well-behaved kernel file with explicit bss_end */ | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int data_end | ||
.int data_end | ||
.int _start | ||
#elif SCENARIO == 2 | ||
/* Well-behaved kernel file with default bss_end */ | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int data_end | ||
.int 0 | ||
.int _start | ||
#elif SCENARIO == 3 | ||
/* Well-behaved kernel file with default load_end */ | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int 0 | ||
.int 0 | ||
.int _start | ||
#elif SCENARIO == 4 | ||
/* Well-behaved kernel file with load_end < data_end and bss > data_end */ | ||
#undef LAST_BYTE_VALUE | ||
#define LAST_BYTE_VALUE 0 | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int code_end | ||
.int 0x140000 | ||
.int _start | ||
#elif SCENARIO == 5 | ||
/* header < load */ | ||
.int 0x10000 | ||
.int 0x100000 | ||
.int data_end | ||
.int data_end | ||
.int _start | ||
#elif SCENARIO == 6 | ||
/* load_end < load */ | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int 0x10000 | ||
.int data_end | ||
.int _start | ||
#elif SCENARIO == 7 | ||
/* header much larger than in reality with default load_end */ | ||
.int 0x80000000 | ||
.int 0x100000 | ||
.int 0 | ||
.int data_end | ||
.int _start | ||
#elif SCENARIO == 8 | ||
/* bss_end < load_end - load (regression test for CVE-2018-7550) */ | ||
.int 0x100000 | ||
.int 0x100000 | ||
.int data_end | ||
.int code_end | ||
.int _start | ||
#elif SCENARIO == 9 | ||
/* Default load_end_addr, load_addr + kernel_file_size > UINT32_MAX */ | ||
.int 0xfffff000 | ||
.int 0xfffff000 | ||
.int 0 | ||
.int 0xfffff001 | ||
.int _start | ||
#else | ||
#error Invalid SCENARIO | ||
#endif | ||
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.section .text | ||
.global _start | ||
_start: | ||
xor %eax, %eax | ||
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cmpb $LAST_BYTE_VALUE, last_byte | ||
je passed | ||
or $0x1, %eax | ||
passed: | ||
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/* Test device exit */ | ||
outl %eax, $0xf4 | ||
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cli | ||
hlt | ||
jmp . | ||
code_end: | ||
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#if SCENARIO != 8 | ||
.space 8192 | ||
#endif | ||
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last_byte: | ||
.byte 0xa5 | ||
data_end: |
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=== Running test case: aout_kludge_1.bin === | ||
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=== Running test case: aout_kludge_2.bin === | ||
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=== Running test case: aout_kludge_3.bin === | ||
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=== Running test case: aout_kludge_4.bin === | ||
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=== Running test case: aout_kludge_5.bin === | ||
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qemu-system-x86_64: invalid load_addr address | ||
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=== Running test case: aout_kludge_6.bin === | ||
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qemu-system-x86_64: invalid load_end_addr address | ||
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=== Running test case: aout_kludge_7.bin === | ||
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qemu-system-x86_64: invalid header_addr address | ||
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=== Running test case: aout_kludge_8.bin === | ||
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qemu-system-x86_64: invalid bss_end_addr address | ||
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=== Running test case: aout_kludge_9.bin === | ||
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qemu-system-x86_64: kernel does not fit in address space |
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