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(parent: c9f2c1a) | patch
bpf: don't indicate success when copy_from_user fails
authorDaniel Borkmann <daniel@iogearbox.net>
Thu, 27 Jul 2017 19:02:46 +0000 (21:02 +0200)
committerDavid S. Miller <davem@davemloft.net>
Sat, 29 Jul 2017 21:28:54 +0000 (14:28 -0700)
commit89b096898a8450b0a5b97d521e000ae9f94f81f9
treefab22c5fc592d584692e3b4f29634825d50a1f18tree | snapshot
parentc9f2c1ae123a751d4e4f949144500219354d5ee1commit | diff
bpf: don't indicate success when copy_from_user fails

err in bpf_prog_get_info_by_fd() still holds 0 at that time from prior
check_uarg_tail_zero() check. Explicitly return -EFAULT instead, so
user space can be notified of buggy behavior.

Fixes: 1e2709769086 ("bpf: Add BPF_OBJ_GET_INFO_BY_FD")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
kernel/bpf/syscall.c diff | blob | history
Domain: System / Kernel;