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chipset_enable.c: Validate physmap() return rcrb value

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Validate the physical mapping in enable_flash_silvermont().

Change-Id: Icc5a799a06b3f310d9a191fa5eb99b255b20d79d
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/48225
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sam McNally <sammc@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/67843
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Edward O'Callaghan 2020-12-02 13:17:46 +11:00 committed by Felix Singer
parent b67c15b90e
commit fd42af0087
1 changed files with 2 additions and 0 deletions
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2
chipset_enable.c
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@ -920,6 +920,8 @@ static int enable_flash_silvermont(struct pci_dev *dev, const char *name)
/* Handle GCS (in RCRB) */ /* Handle GCS (in RCRB) */
void *rcrb = physmap("BYT RCRB", rcba, 4); void *rcrb = physmap("BYT RCRB", rcba, 4);
if (rcrb == ERROR_PTR)
return ERROR_FATAL;
enable_flash_ich_report_gcs(dev, ich_generation, rcrb); enable_flash_ich_report_gcs(dev, ich_generation, rcrb);
physunmap(rcrb, 4); physunmap(rcrb, 4);