sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-13 15:31:42 +03:00
Code Issues Packages Projects Releases Wiki Activity

[efi] Always allow MAX_LL_HEADER_LEN for the link-layer header

Browse Source 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-11-19 15:32:05 +00:00
parent 1782fc7011
commit 308615cd97
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/interface/efi/efi_snp.c
View File

@@ -530,6 +530,7 @@ efi_snp_transmit ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
container_of ( snp, struct efi_snp_device, snp ); container_of ( snp, struct efi_snp_device, snp );
struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol; struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol;
struct io_buffer *iobuf; struct io_buffer *iobuf;
size_t ll_headroom;
int rc; int rc;
EFI_STATUS efirc; EFI_STATUS efirc;
@@ -582,13 +583,15 @@ efi_snp_transmit ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
} }
/* Allocate buffer */ /* Allocate buffer */
iobuf = alloc_iob ( len ); ll_headroom = ( MAX_LL_HEADER_LEN - ll_header_len );
iobuf = alloc_iob ( ll_headroom + len );
if ( ! iobuf ) { if ( ! iobuf ) {
DBGC ( snpdev, "SNPDEV %p TX could not allocate %ld-byte " DBGC ( snpdev, "SNPDEV %p TX could not allocate %ld-byte "
"buffer\n", snpdev, ( ( unsigned long ) len ) ); "buffer\n", snpdev, ( ( unsigned long ) len ) );
efirc = EFI_DEVICE_ERROR; efirc = EFI_DEVICE_ERROR;
goto err_alloc_iob; goto err_alloc_iob;
} }
iob_reserve ( iobuf, ll_headroom );
memcpy ( iob_put ( iobuf, len ), data, len ); memcpy ( iob_put ( iobuf, len ), data, len );
/* Create link-layer header, if specified */ /* Create link-layer header, if specified */