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efi_selftest: check crc32 for InstallConfigurationTable

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InstallConfigurationTable() may change the number of installed
configuration tables.

Check the crc32 of the system table.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-07-07 15:36:06 +02:00 • committed by Alexander Graf
parent 55d8ee3b7b
commit 74fc044574
1 changed files with 43 additions and 0 deletions
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43
lib/efi_selftest/efi_selftest_config_table.c
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@ -32,6 +32,36 @@ static void EFIAPI notify(struct efi_event *event, void *context)
++*count;
}
/*
* Check crc32 of a table.
*/
static int check_table(const void *table)
{
efi_status_t ret;
u32 crc32, res;
/* Casting from const to not const */
struct efi_table_hdr *hdr = (struct efi_table_hdr *)table;
crc32 = hdr->crc32;
/*
* Setting the crc32 of the 'const' table to zero is easier than
* copying
*/
hdr->crc32 = 0;
ret = boottime->calculate_crc32(table, hdr->headersize, &res);
/* Reset table crc32 so it stays constant */
hdr->crc32 = crc32;
if (ret != EFI_ST_SUCCESS) {
efi_st_error("CalculateCrc32 failed\n");
return EFI_ST_FAILURE;
}
if (res != crc32) {
efi_st_error("Incorrect CRC32\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Setup unit test.
*
@ -135,6 +165,11 @@ static int execute(void)
efi_st_error("Incorrect table address\n");
return EFI_ST_FAILURE;
}
if (check_table(sys_table) != EFI_ST_SUCCESS) {
efi_st_error("Checking system table\n");
return EFI_ST_FAILURE;
}
/* Update table */
ret = boottime->install_configuration_table(&table_guid,
(void *)&tables[1]);
@ -175,6 +210,10 @@ static int execute(void)
efi_st_error("Incorrect table address\n");
return EFI_ST_FAILURE;
}
if (check_table(sys_table) != EFI_ST_SUCCESS) {
efi_st_error("Checking system table\n");
return EFI_ST_FAILURE;
}
/* Delete table */
ret = boottime->install_configuration_table(&table_guid, NULL);
@ -211,6 +250,10 @@ static int execute(void)
efi_st_error("Failed to close event\n");
return EFI_ST_FAILURE;
}
if (check_table(sys_table) != EFI_ST_SUCCESS) {
efi_st_error("Checking system table\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}