6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ard Biesheuvel ardb@kernel.org
commit ae835a96d72cd025421910edb0e8faf706998727 upstream.
This is a partial revert of commit
8117961d98f ("x86/efi: Disregard setup header of loaded image")
which triggers boot issues on older Dell laptops. As it turns out, switching back to a heap allocation for the struct boot_params constructed by the EFI stub works around this, even though it is unclear why.
Cc: Christian Heusel christian@heusel.eu Reported-by: mavrix#kernel@simplelogin.com Signed-off-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/firmware/efi/libstub/x86-stub.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
--- a/drivers/firmware/efi/libstub/x86-stub.c +++ b/drivers/firmware/efi/libstub/x86-stub.c @@ -435,11 +435,12 @@ void __noreturn efi_stub_entry(efi_handl efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg) { - static struct boot_params boot_params __page_aligned_bss; - struct setup_header *hdr = &boot_params.hdr; efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; + struct boot_params *boot_params; + struct setup_header *hdr; int options_size = 0; efi_status_t status; + unsigned long alloc; char *cmdline_ptr;
if (efi_is_native()) @@ -457,6 +458,13 @@ efi_status_t __efiapi efi_pe_entry(efi_h efi_exit(handle, status); }
+ status = efi_allocate_pages(PARAM_SIZE, &alloc, ULONG_MAX); + if (status != EFI_SUCCESS) + efi_exit(handle, status); + + boot_params = memset((void *)alloc, 0x0, PARAM_SIZE); + hdr = &boot_params->hdr; + /* Assign the setup_header fields that the kernel actually cares about */ hdr->root_flags = 1; hdr->vid_mode = 0xffff; @@ -466,13 +474,15 @@ efi_status_t __efiapi efi_pe_entry(efi_h
/* Convert unicode cmdline to ascii */ cmdline_ptr = efi_convert_cmdline(image, &options_size); - if (!cmdline_ptr) + if (!cmdline_ptr) { + efi_free(PARAM_SIZE, alloc); efi_exit(handle, EFI_OUT_OF_RESOURCES); + }
efi_set_u64_split((unsigned long)cmdline_ptr, &hdr->cmd_line_ptr, - &boot_params.ext_cmd_line_ptr); + &boot_params->ext_cmd_line_ptr);
- efi_stub_entry(handle, sys_table_arg, &boot_params); + efi_stub_entry(handle, sys_table_arg, boot_params); /* not reached */ }