diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2021-09-01 09:33:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-20 12:45:00 +0300 |
| commit | 5100dc4489ab7497da9c062cb6a781a5ba04d51b (patch) | |
| tree | ada511f2d300d32178169428407c9f7970576d56 /drivers/firmware | |
| parent | 2c5dd2a8af7704776376c8885d3b78d2442c32ed (diff) | |
| download | linux-5100dc4489ab7497da9c062cb6a781a5ba04d51b.tar.xz | |
efi/cper: use stack buffer for error record decoding
commit b3a72ca80351917cc23f9e24c35f3c3979d3c121 upstream.
Joe reports that using a statically allocated buffer for converting CPER
error records into human readable text is probably a bad idea. Even
though we are not aware of any actual issues, a stack buffer is clearly
a better choice here anyway, so let's move the buffer into the stack
frames of the two functions that refer to it.
Cc: <stable@vger.kernel.org>
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/cper.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index ea7ca74fc173..232c092c4c97 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -25,8 +25,6 @@ #include <acpi/ghes.h> #include <ras/ras_event.h> -static char rcd_decode_str[CPER_REC_LEN]; - /* * CPER record ID need to be unique even after reboot, because record * ID is used as index for ERST storage, while CPER records from @@ -313,6 +311,7 @@ const char *cper_mem_err_unpack(struct trace_seq *p, struct cper_mem_err_compact *cmem) { const char *ret = trace_seq_buffer_ptr(p); + char rcd_decode_str[CPER_REC_LEN]; if (cper_mem_err_location(cmem, rcd_decode_str)) trace_seq_printf(p, "%s", rcd_decode_str); @@ -327,6 +326,7 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem, int len) { struct cper_mem_err_compact cmem; + char rcd_decode_str[CPER_REC_LEN]; /* Don't trust UEFI 2.1/2.2 structure with bad validation bits */ if (len == sizeof(struct cper_sec_mem_err_old) && |