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b65f370d06
linux/kernel/bpf
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Okash Khawaja b65f370d06 bpf: btf: Fix bitfield extraction for big endian 
When extracting bitfield from a number, btf_int_bits_seq_show() builds
a mask and accesses least significant byte of the number in a way
specific to little-endian. This patch fixes that by checking endianness
of the machine and then shifting left and right the unneeded bits.

Thanks to Martin Lau for the help in navigating potential pitfalls when
dealing with endianess and for the final solution.

Fixes: b00b8daec8 ("bpf: btf: Add pretty print capability for data with BTF type info")
Signed-off-by: Okash Khawaja <osk@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-07-11 22:36:08 +02:00
..
arraymap.c bpf: btf: Rename btf_key_id and btf_value_id in bpf_map_info 2018-05-23 12:03:32 +02:00
bpf_lru_list.c bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4 2017-04-17 13:55:52 -04:00
bpf_lru_list.h bpf: Only set node->ref = 1 if it has not been set 2017-09-01 09:57:39 -07:00
btf.c bpf: btf: Fix bitfield extraction for big endian 2018-07-11 22:36:08 +02:00
cgroup.c bpf: fix attach type BPF_LIRC_MODE2 dependency wrt CONFIG_CGROUP_BPF 2018-06-26 11:28:38 +02:00
core.c bpf: undo prog rejection on read-only lock failure 2018-06-29 10:47:35 -07:00
cpumap.c xdp: introduce xdp_return_frame_rx_napi 2018-05-24 18:36:15 -07:00
devmap.c xdp: XDP_REDIRECT should check IFF_UP and MTU 2018-07-07 15:25:35 -07:00
disasm.c bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
disasm.h bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
hashtab.c bpf: hash map: decrement counter on error 2018-07-03 23:26:28 +02:00
helpers.c bpf: implement bpf_get_current_cgroup_id() helper 2018-06-03 18:22:41 -07:00
inode.c bpf: implement dummy fops for bpf objects 2018-06-08 10:58:48 -07:00
lpm_trie.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
Makefile bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP 2018-05-03 15:55:24 -07:00
map_in_map.c bpf: Add syscall lookup support for fd array and htab 2017-06-29 13:13:25 -04:00
map_in_map.h bpf: Add syscall lookup support for fd array and htab 2017-06-29 13:13:25 -04:00
offload.c bpf: offload: allow offloaded programs to use perf event arrays 2018-05-04 23:41:03 +02:00
percpu_freelist.c bpf: fix lockdep splat 2017-11-15 19:46:32 +09:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
sockmap.c bpf: sockmap, convert bpf_compute_data_pointers to bpf_*_sk_skb 2018-07-07 15:19:30 -07:00
stackmap.c bpf: avoid -Wmaybe-uninitialized warning 2018-05-28 17:40:59 +02:00
syscall.c bpf: sockhash, disallow bpf_tcp_close and update in parallel 2018-07-07 15:19:30 -07:00
tnum.c bpf/verifier: improve register value range tracking with ARSH 2018-04-29 08:45:53 -07:00
verifier.c treewide: Use array_size() in vzalloc() 2018-06-12 16:19:22 -07:00
xskmap.c xsk: clean up SPDX headers 2018-05-18 16:07:02 +02:00