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* Fix a bug in the Common Platform Error Record (CPER) driver that

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caused old UEFI spec (< 2.3) versions of the memory error record
    structure to be declared invalid - Tony Luck
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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent

Pull an EFI fix from Matt Fleming:

 - Fix a bug in the Common Platform Error Record (CPER) driver that
   caused old UEFI spec (< 2.3) versions of the memory error record
   structure to be declared invalid. (Tony Luck)

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-07-21 09:52:51 +02:00
commit cd369c2239
2 changed files with 33 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/firmware/efi/cper.c
View File

@ -305,10 +305,17 @@ const char *cper_mem_err_unpack(struct trace_seq *p,
return ret; return ret;
} }
static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem) static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem,
int len)
{ {
struct cper_mem_err_compact cmem; struct cper_mem_err_compact cmem;
/* Don't trust UEFI 2.1/2.2 structure with bad validation bits */
if (len == sizeof(struct cper_sec_mem_err_old) &&
(mem->validation_bits & ~(CPER_MEM_VALID_RANK_NUMBER - 1))) {
pr_err(FW_WARN "valid bits set for fields beyond structure\n");
return;
}
if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS) if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status); printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
if (mem->validation_bits & CPER_MEM_VALID_PA) if (mem->validation_bits & CPER_MEM_VALID_PA)
@ -405,8 +412,10 @@ static void cper_estatus_print_section(
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) { } else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err = (void *)(gdata + 1); struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
printk("%s""section_type: memory error\n", newpfx); printk("%s""section_type: memory error\n", newpfx);
if (gdata->error_data_length >= sizeof(*mem_err)) if (gdata->error_data_length >=
cper_print_mem(newpfx, mem_err); sizeof(struct cper_sec_mem_err_old))
cper_print_mem(newpfx, mem_err,
gdata->error_data_length);
else else
goto err_section_too_small; goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) { } else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {

22
include/linux/cper.h
View File

@ -340,7 +340,27 @@ struct cper_ia_proc_ctx {
__u64 mm_reg_addr; __u64 mm_reg_addr;
}; };
/* Memory Error Section */ /* Old Memory Error Section UEFI 2.1, 2.2 */
struct cper_sec_mem_err_old {
__u64 validation_bits;
__u64 error_status;
__u64 physical_addr;
__u64 physical_addr_mask;
__u16 node;
__u16 card;
__u16 module;
__u16 bank;
__u16 device;
__u16 row;
__u16 column;
__u16 bit_pos;
__u64 requestor_id;
__u64 responder_id;
__u64 target_id;
__u8 error_type;
};
/* Memory Error Section UEFI >= 2.3 */
struct cper_sec_mem_err { struct cper_sec_mem_err {
__u64 validation_bits; __u64 validation_bits;
__u64 error_status; __u64 error_status;