diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-07-21 10:52:51 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-21 10:52:51 +0300 |
| commit | cd369c2239dd08c273c0fafbbea44e3e0c509ebd (patch) | |
| tree | ed0959e0532ceb79ae6aaae35fe900dfe41e454c /drivers/firmware | |
| parent | f5530d5af835ffa82a0607f5f1977d63ac02551f (diff) | |
| parent | 4c62360d7562a20c996836d163259c87d9378120 (diff) | |
| download | linux-cd369c2239dd08c273c0fafbbea44e3e0c509ebd.tar.xz | |
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>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/cper.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 4fd9961d552e..d42537425438 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -305,10 +305,17 @@ const char *cper_mem_err_unpack(struct trace_seq *p, 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; + /* 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) printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status); 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)) { struct cper_sec_mem_err *mem_err = (void *)(gdata + 1); printk("%s""section_type: memory error\n", newpfx); - if (gdata->error_data_length >= sizeof(*mem_err)) - cper_print_mem(newpfx, mem_err); + if (gdata->error_data_length >= + sizeof(struct cper_sec_mem_err_old)) + cper_print_mem(newpfx, mem_err, + gdata->error_data_length); else goto err_section_too_small; } else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) { |