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author | Olof Johansson <olof@lixom.net> | 2020-03-03 16:40:54 -0800 |
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committer | Olof Johansson <olof@lixom.net> | 2020-03-03 16:40:56 -0800 |
commit | 820d15632ec10bc0cf79595c5a635b795d149520 (patch) | |
tree | 9deb7defafc350a3c74365ebe370634f0406d821 /drivers/net/wireguard/send.c | |
parent | Merge tag 'arm-soc/for-5.6/defconfig-fixes' of https://github.com/Broadcom/stblinux into arm/fixes (diff) | |
parent | arm64: dts: socfpga: agilex: Fix gmac compatible (diff) | |
download | linux-dev-820d15632ec10bc0cf79595c5a635b795d149520.tar.xz linux-dev-820d15632ec10bc0cf79595c5a635b795d149520.zip |
Merge tag 'socfpga_dts_fix_for_v5.6_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux into arm/fixes
arm64: dts: agilex: fix gmac compatible
- The compatible for Agilex GMAC should be "altr,socfpga-stmmac-a10-s10"
* tag 'socfpga_dts_fix_for_v5.6_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux: (578 commits)
arm64: dts: socfpga: agilex: Fix gmac compatible
Linux 5.6-rc4
KVM: VMX: check descriptor table exits on instruction emulation
ext4: potential crash on allocation error in ext4_alloc_flex_bg_array()
macintosh: therm_windtunnel: fix regression when instantiating devices
jbd2: fix data races at struct journal_head
kvm: x86: Limit the number of "kvm: disabled by bios" messages
KVM: x86: avoid useless copy of cpufreq policy
KVM: allow disabling -Werror
KVM: x86: allow compiling as non-module with W=1
KVM: Pre-allocate 1 cpumask variable per cpu for both pv tlb and pv ipis
KVM: Introduce pv check helpers
KVM: let declaration of kvm_get_running_vcpus match implementation
KVM: SVM: allocate AVIC data structures based on kvm_amd module parameter
MAINTAINERS: Correct Cadence PCI driver path
io_uring: fix 32-bit compatability with sendmsg/recvmsg
net: dsa: mv88e6xxx: Fix masking of egress port
mlxsw: pci: Wait longer before accessing the device after reset
sfc: fix timestamp reconstruction at 16-bit rollover points
vsock: fix potential deadlock in transport->release()
...
Link: https://lore.kernel.org/r/20200303153509.28248-1-dinguyen@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/net/wireguard/send.c')
-rw-r--r-- | drivers/net/wireguard/send.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/net/wireguard/send.c b/drivers/net/wireguard/send.c index c13260563446..7348c10cbae3 100644 --- a/drivers/net/wireguard/send.c +++ b/drivers/net/wireguard/send.c @@ -143,16 +143,22 @@ static void keep_key_fresh(struct wg_peer *peer) static unsigned int calculate_skb_padding(struct sk_buff *skb) { + unsigned int padded_size, last_unit = skb->len; + + if (unlikely(!PACKET_CB(skb)->mtu)) + return ALIGN(last_unit, MESSAGE_PADDING_MULTIPLE) - last_unit; + /* We do this modulo business with the MTU, just in case the networking * layer gives us a packet that's bigger than the MTU. In that case, we * wouldn't want the final subtraction to overflow in the case of the - * padded_size being clamped. + * padded_size being clamped. Fortunately, that's very rarely the case, + * so we optimize for that not happening. */ - unsigned int last_unit = skb->len % PACKET_CB(skb)->mtu; - unsigned int padded_size = ALIGN(last_unit, MESSAGE_PADDING_MULTIPLE); + if (unlikely(last_unit > PACKET_CB(skb)->mtu)) + last_unit %= PACKET_CB(skb)->mtu; - if (padded_size > PACKET_CB(skb)->mtu) - padded_size = PACKET_CB(skb)->mtu; + padded_size = min(PACKET_CB(skb)->mtu, + ALIGN(last_unit, MESSAGE_PADDING_MULTIPLE)); return padded_size - last_unit; } |