linux/tools/testing
Jakub Kicinski d777b2ddbe bpf: don't zero out the info struct in bpf_obj_get_info_by_fd()
The buffer passed to bpf_obj_get_info_by_fd() should be initialized
to zeros.  Kernel will enforce that to guarantee we can safely extend
info structures in the future.

Making the bpf_obj_get_info_by_fd() call in libbpf perform the zeroing
is problematic, however, since some members of the info structures
may need to be initialized by the callers (for instance pointers
to buffers to which kernel is to dump translated and jited images).

Remove the zeroing and fix up the in-tree callers before any kernel
has been released with this code.

As Daniel points out this seems to be the intended operation anyway,
since commit 95b9afd398 ("bpf: Test for bpf ID") is itself setting
the buffer pointers before calling bpf_obj_get_info_by_fd().

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-26 17:02:52 -07:00
..
fault-injection fault-injection: fix failcmd.sh warning 2012-07-31 18:42:38 -07:00
ktest Greg Kroah-Hartman reported to me that the ktest of v4.10 locked up in an 2017-03-08 11:06:05 -08:00
nvdimm tools/testing/nvdimm: fix nfit_test buffer overflow 2017-06-15 14:31:41 -07:00
radix-tree radix tree test suite: Specify -m32 in LDFLAGS too 2017-03-07 13:18:24 -05:00
selftests bpf: don't zero out the info struct in bpf_obj_get_info_by_fd() 2017-07-26 17:02:52 -07:00