Teng Qin fcbc8d0e7d bpf: map_get_next_key to return first key on NULL ...

commit 8fe4592438 upstream.

When iterating through a map, we need to find a key that does not exist
in the map so map_get_next_key will give us the first key of the map.
This often requires a lot of guessing in production systems.

This patch makes map_get_next_key return the first key when the key
pointer in the parameter is NULL.

Signed-off-by: Teng Qin <qinteng@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chenbo Feng <fengc@google.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-05-09 09:50:19 +02:00

..

arraymap.c

bpf: map_get_next_key to return first key on NULL

2018-05-09 09:50:19 +02:00

core.c

bpf: fix divides by zero

2018-01-31 12:55:57 +01:00

hashtab.c

bpf: map_get_next_key to return first key on NULL

2018-05-09 09:50:19 +02:00

helpers.c

bpf: direct packet write and access for helpers for clsact progs

2016-09-20 23:32:11 -04:00

inode.c

fs: Replace CURRENT_TIME with current_time() for inode timestamps

2016-09-27 21:06:21 -04:00

Makefile

bpf: introduce percpu_freelist

2016-03-08 15:28:31 -05:00

percpu_freelist.c

bpf: fix lockdep splat

2017-12-14 09:28:23 +01:00

percpu_freelist.h

bpf: introduce percpu_freelist

2016-03-08 15:28:31 -05:00

stackmap.c

bpf: fix wrong exposure of map_flags into fdinfo for lpm

2018-03-11 16:21:34 +01:00

syscall.c

bpf: map_get_next_key to return first key on NULL

2018-05-09 09:50:19 +02:00

verifier.c

bpf: reject stores into ctx via st and xadd

2018-01-31 12:55:57 +01:00