Some EFI implementations return always a MaximumVariableSize of 0,
check against max_size only if it is non-zero.
Signed-off-by: Richard Weinberger <rich...@nod.at>
---
drivers/firmware/efivars.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 7acafb8..60c9899 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -449,7 +449,11 @@ check_var_size_locked(struct efivars *efivars, u32
attributes,
if (status != EFI_SUCCESS)
return status;
- if (!storage_size || size > remaining_size || size > max_size ||
+ if (!max_size && remaining_size > size)
+ printk_once(KERN_ERR FW_BUG "Broken EFI implementation is
returning MaxVariableSize=0\n");
+
+ if (!storage_size || size > remaining_size ||
+ (max_size && size > max_size) ||
(remaining_size - size) < (storage_size / 2))
return EFI_OUT_OF_RESOURCES;
--
1.8.1.4
--
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