Maciej Fijalkowski 2f6f72ee9a libbpf: Clear map_info before each bpf_obj_get_info_by_fd ... commit 2b2aedabc44e9660f90ccf7ba1ca2706d75f411f upstream. xsk_lookup_bpf_maps, based on prog_fd, looks whether current prog has a reference to XSKMAP. BPF prog can include insns that work on various BPF maps and this is covered by iterating through map_ids. The bpf_map_info that is passed to bpf_obj_get_info_by_fd for filling needs to be cleared at each iteration, so that it doesn't contain any outdated fields and that is currently missing in the function of interest. To fix that, zero-init map_info via memset before each bpf_obj_get_info_by_fd call. Also, since the area of this code is touched, in general strcmp is considered harmful, so let's convert it to strncmp and provide the size of the array name for current map_info. While at it, do s/continue/break/ once we have found the xsks_map to terminate the search. Fixes: 5750902a6e ("libbpf: proper XSKMAP cleanup") Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Björn Töpel <bjorn.topel@intel.com> Link: https://lore.kernel.org/bpf/20210303185636.18070-4-maciej.fijalkowski@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-03-17 17:06:12 +01:00
..
api	libperf: Avoid counting of nonfilterable fdarray fds	2020-07-21 09:53:22 -03:00
bpf	libbpf: Clear map_info before each bpf_obj_get_info_by_fd	2021-03-17 17:06:12 +01:00
lockdep
perf	perf evlist: Fix id index for heterogeneous systems	2021-01-27 11:55:11 +01:00
subcmd	tools: Avoid comma separated statements	2020-10-02 10:36:36 -06:00
symbol
traceevent	tools lib traceevent: Hide non API functions	2020-10-13 11:47:38 -03:00
argv_split.c
bitmap.c
ctype.c
find_bit.c
hweight.c
rbtree.c	tools/: replace HTTP links with HTTPS ones	2020-08-07 11:33:21 -07:00
str_error_r.c
string.c
vsprintf.c
zalloc.c