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| author | Mark Starovoytov <mstarovoitov@marvell.com> | 2020-06-26 21:40:37 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-26 16:32:51 -0700 |
| commit | 8664240e303827de2d40f38fc397d1912309359c (patch) | |
| tree | a66fb5abb214f3fd196f2bc9eb3792c93415707c /drivers/net/ethernet | |
| parent | 6ec99221d780b3b4b86cf9cdafc18699ff3d06c9 (diff) | |
| download | linux-8664240e303827de2d40f38fc397d1912309359c.tar.gz | |
net: atlantic: add alignment checks in hw_atl2_utils_fw.c
This patch adds alignment checks in all the helper macros in hw_atl2_utils_fw.c These alignment checks are compile-time, so runtime is not affected. All these helper macros assume the length to be aligned (multiple of 4). If it's not aligned, then there might be issues, e.g. stack corruption. Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com> Signed-off-by: Igor Russkikh <irusskikh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c index 3a9352190816..a8ce9a2c1c51 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c @@ -16,15 +16,29 @@ #define AQ_A2_FW_READ_TRY_MAX 1000 #define hw_atl2_shared_buffer_write(HW, ITEM, VARIABLE) \ +{\ + BUILD_BUG_ON_MSG((offsetof(struct fw_interface_in, ITEM) % \ + sizeof(u32)) != 0,\ + "Unaligned write " # ITEM);\ + BUILD_BUG_ON_MSG((sizeof(VARIABLE) % sizeof(u32)) != 0,\ + "Unaligned write length " # ITEM);\ hw_atl2_mif_shared_buf_write(HW,\ (offsetof(struct fw_interface_in, ITEM) / sizeof(u32)),\ - (u32 *)&(VARIABLE), sizeof(VARIABLE) / sizeof(u32)) + (u32 *)&(VARIABLE), sizeof(VARIABLE) / sizeof(u32));\ +} #define hw_atl2_shared_buffer_get(HW, ITEM, VARIABLE) \ +{\ + BUILD_BUG_ON_MSG((offsetof(struct fw_interface_in, ITEM) % \ + sizeof(u32)) != 0,\ + "Unaligned get " # ITEM);\ + BUILD_BUG_ON_MSG((sizeof(VARIABLE) % sizeof(u32)) != 0,\ + "Unaligned get length " # ITEM);\ hw_atl2_mif_shared_buf_get(HW, \ (offsetof(struct fw_interface_in, ITEM) / sizeof(u32)),\ (u32 *)&(VARIABLE), \ - sizeof(VARIABLE) / sizeof(u32)) + sizeof(VARIABLE) / sizeof(u32));\ +} /* This should never be used on non atomic fields, * treat any > u32 read as non atomic. @@ -33,7 +47,9 @@ {\ BUILD_BUG_ON_MSG((offsetof(struct fw_interface_out, ITEM) % \ sizeof(u32)) != 0,\ - "Non aligned read " # ITEM);\ + "Unaligned read " # ITEM);\ + BUILD_BUG_ON_MSG((sizeof(VARIABLE) % sizeof(u32)) != 0,\ + "Unaligned read length " # ITEM);\ BUILD_BUG_ON_MSG(sizeof(VARIABLE) > sizeof(u32),\ "Non atomic read " # ITEM);\ hw_atl2_mif_shared_buf_read(HW, \ @@ -42,10 +58,18 @@ } #define hw_atl2_shared_buffer_read_safe(HW, ITEM, DATA) \ +({\ + BUILD_BUG_ON_MSG((offsetof(struct fw_interface_out, ITEM) % \ + sizeof(u32)) != 0,\ + "Unaligned read_safe " # ITEM);\ + BUILD_BUG_ON_MSG((sizeof(((struct fw_interface_out *)0)->ITEM) % \ + sizeof(u32)) != 0,\ + "Unaligned read_safe length " # ITEM);\ hw_atl2_shared_buffer_read_block((HW), \ (offsetof(struct fw_interface_out, ITEM) / sizeof(u32)),\ sizeof(((struct fw_interface_out *)0)->ITEM) / sizeof(u32),\ - (DATA)) + (DATA));\ +}) static int hw_atl2_shared_buffer_read_block(struct aq_hw_s *self, u32 offset, u32 dwords, void *data) |