Yonghong Song 239946314e bpf: possibly avoid extra masking for narrower load in verifier ... Commit 31fd85816d ("bpf: permits narrower load from bpf program context fields") permits narrower load for certain ctx fields. The commit however will already generate a masking even if the prog-specific ctx conversion produces the result with narrower size. For example, for __sk_buff->protocol, the ctx conversion loads the data into register with 2-byte load. A narrower 2-byte load should not generate masking. For __sk_buff->vlan_present, the conversion function set the result as either 0 or 1, essentially a byte. The narrower 2-byte or 1-byte load should not generate masking. To avoid unnecessary masking, prog-specific *_is_valid_access now passes converted_op_size back to verifier, which indicates the valid data width after perceived future conversion. Based on this information, verifier is able to avoid unnecessary marking. Since we want more information back from prog-specific *_is_valid_access checking, all of them are packed into one data structure for more clarity. Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-06-23 14:04:11 -04:00
..
acpi	Merge branch 'acpica-fixes'	2017-06-15 01:52:32 +02:00
asm-generic	Kbuild UAPI header export updates for v4.12	2017-05-10 20:45:36 -07:00
clocksource
crypto	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2017-05-03 08:50:52 -07:00
drm	drm/dp: start a DPCD based DP sink/branch device quirk database	2017-05-29 13:43:26 +03:00
dt-bindings	clk: sunxi-ng: a64: Export PLL_PERIPH0 clock for the PRCM	2017-05-31 21:57:30 +02:00
keys
kvm	KVM: arm/arm64: Fix bug when registering redist iodevs	2017-05-18 11:18:12 +02:00
linux	bpf: possibly avoid extra masking for narrower load in verifier	2017-06-23 14:04:11 -04:00
math-emu
media	[media] media/cec.h: use IS_REACHABLE instead of IS_ENABLED	2017-06-08 16:52:28 -03:00
memory
misc
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-06-21 17:35:22 -04:00
pcmcia
ras
rdma	RDMA/SA: Fix kernel panic in CMA request handler flow	2017-06-01 17:20:14 -04:00
rxrpc	rxrpc: Implement service upgrade	2017-06-05 14:30:49 +01:00
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2017-05-12 11:44:13 -07:00
soc	net/wan/fsl_ucc_hdlc: add hdlc-bus support	2017-05-18 10:28:39 -04:00
sound
target	iscsi-target: Fix initial login PDU asynchronous socket close OOPs	2017-05-31 15:12:31 -07:00
trace	rxrpc: Add service upgrade support for client connections	2017-06-05 14:30:49 +01:00
uapi	xdp: add reporting of offload mode	2017-06-23 13:42:20 -04:00
video	uapi: export all headers under uapi directories	2017-05-11 00:21:54 +09:00
xen