Jakub Sitnicki 995f517888 bpf: Make dst_port field in struct bpf_sock 16-bit wide ... [ Upstream commit 4421a58271 ] Menglong Dong reports that the documentation for the dst_port field in struct bpf_sock is inaccurate and confusing. From the BPF program PoV, the field is a zero-padded 16-bit integer in network byte order. The value appears to the BPF user as if laid out in memory as so: offsetof(struct bpf_sock, dst_port) + 0 <port MSB> + 8 <port LSB> +16 0x00 +24 0x00 32-, 16-, and 8-bit wide loads from the field are all allowed, but only if the offset into the field is 0. 32-bit wide loads from dst_port are especially confusing. The loaded value, after converting to host byte order with bpf_ntohl(dst_port), contains the port number in the upper 16-bits. Remove the confusion by splitting the field into two 16-bit fields. For backward compatibility, allow 32-bit wide loads from offsetof(struct bpf_sock, dst_port). While at it, allow loads 8-bit loads at offset [0] and [1] from dst_port. Reported-by: Menglong Dong <imagedong@tencent.com> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/r/20220130115518.213259-2-jakub@cloudflare.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-13 21:00:55 +02:00
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asm-generic	aio: fix use-after-free due to missing POLLFREE handling	2021-12-14 11:32:40 +01:00
drm	drm/fourcc: fix Amlogic format modifier masks	2021-03-04 11:37:38 +01:00
linux	bpf: Make dst_port field in struct bpf_sock 16-bit wide	2022-04-13 21:00:55 +02:00
misc	habanalabs: Add an option to map CB to device MMU	2020-09-22 18:49:54 +03:00
mtd	MTD: mtd-abi.h: drop a duplicated word	2020-08-02 23:00:10 +02:00
rdma	RDMA/vmw_pvrdma: Fix network_hdr_type reported in WC	2021-01-30 13:55:18 +01:00
scsi
sound	ALSA: fix kernel-doc markups	2020-10-26 15:26:31 +01:00
video
xen	xen/gntdev: gntdev.h: drop a duplicated word	2020-08-03 07:46:42 +02:00
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