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efi/libstub: Zero initialize heap allocated struct screen_info

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commit ee8b8f5d83eb2c9caaebcf633310905ee76856e9 upstream.

After calling uefi interface allocate_pool to apply for memory, we
should clear 0 to prevent the possibility of using random values.

Signed-off-by: Qiang Ma <maqianga@uniontech.com>
Cc: <stable@vger.kernel.org> # v6.6+
Fixes: 732ea9db9d ("efi: libstub: Move screen_info handling to common code")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Qiang Ma
2024-07-17 15:00:43 +08:00
committed by Greg Kroah-Hartman
parent ea4f779462
commit f17cbe5545
1 changed files with 2 additions and 0 deletions
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2
drivers/firmware/efi/libstub/screen_info.c
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@@ -32,6 +32,8 @@ struct screen_info *__alloc_screen_info(void)
if (status != EFI_SUCCESS)
return NULL;
memset(si, 0, sizeof(*si));
status = efi_bs_call(install_configuration_table,
&screen_info_guid, si);
if (status == EFI_SUCCESS)