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Dave reported that on sparc test_progs generates buggy swapped eth->h_proto protocol comparisons: 10: (15) if r3 == 0xdd86 goto pc+9 R0=imm2,min_value=2,max_value=2 R1=pkt(id=0,off=0,r=14) R2=pkt_end R3=inv R4=pkt(id=0,off=14,r=14) R5=inv56 R10=fp This is due to the unconditional ... #define htons __builtin_bswap16 #define ntohs __builtin_bswap16 ... in test_progs that causes this. Make use of asm/byteorder.h and use __constant_htons() where possible and only perform the bswap16 when on little endian in non-constant case. Fixes:6882804c91("selftests/bpf: add a test for overlapping packet range checks") Fixes:3782161362("selftests/bpf: add l4 load balancer test based on sched_cls") Reported-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.