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Validate process area

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This commit is contained in:
Alex Kotov 2020-11-26 17:22:33 +05:00
parent 1138bfcb06
commit 32ea70c6c4
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
2 changed files with 11 additions and 2 deletions
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8
kernelmq/process.c
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@ -71,6 +71,10 @@ enum KernelMQ_Process_Error KernelMQ_Process_create_from_kernel(
return KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG; return KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG;
} }
if (base + size - 1 != limit) {
return KERNELMQ_PROCESS_ERROR_INVALID_AREA;
}
process->areas[area_index].base = base; process->areas[area_index].base = base;
process->areas[area_index].size = size; process->areas[area_index].size = size;
process->areas[area_index].limit = limit; process->areas[area_index].limit = limit;
@ -108,6 +112,10 @@ enum KernelMQ_Process_Error KernelMQ_Process_create_from_module(
return KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG; return KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG;
} }
if (base + size - 1 != limit) {
return KERNELMQ_PROCESS_ERROR_INVALID_AREA;
}
process->areas[0].base = base; process->areas[0].base = base;
process->areas[0].size = size; process->areas[0].size = size;
process->areas[0].limit = limit; process->areas[0].limit = limit;

5
kernelmq/process.h
View file

@ -18,8 +18,9 @@ enum KernelMQ_Process_Error {
KERNELMQ_PROCESS_ERROR_OK = 0, KERNELMQ_PROCESS_ERROR_OK = 0,
KERNELMQ_PROCESS_ERROR_CMDLINE_TOO_LONG = 1, KERNELMQ_PROCESS_ERROR_CMDLINE_TOO_LONG = 1,
KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG = 2, KERNELMQ_PROCESS_ERROR_ADDR_TOO_BIG = 2,
KERNELMQ_PROCESS_ERROR_KERNEL_AREAS_LENGTH_TOO_LONG = 3, KERNELMQ_PROCESS_ERROR_INVALID_AREA = 3,
KERNELMQ_PROCESS_ERROR_MODULES_TOO_MANY = 4, KERNELMQ_PROCESS_ERROR_KERNEL_AREAS_LENGTH_TOO_LONG = 4,
KERNELMQ_PROCESS_ERROR_MODULES_TOO_MANY = 5,
}; };
enum KernelMQ_Process_CreatedFrom { enum KernelMQ_Process_CreatedFrom {