linux/kernel/bpf
Daniel Borkmann 20b2b24f91 bpf: fix map not being uncharged during map creation failure
In map_create(), we first find and create the map, then once that
suceeded, we charge it to the user's RLIMIT_MEMLOCK, and then fetch
a new anon fd through anon_inode_getfd(). The problem is, once the
latter fails f.e. due to RLIMIT_NOFILE limit, then we only destruct
the map via map->ops->map_free(), but without uncharging the previously
locked memory first. That means that the user_struct allocation is
leaked as well as the accounted RLIMIT_MEMLOCK memory not released.
Make the label names in the fix consistent with bpf_prog_load().

Fixes: aaac3ba95e ("bpf: charge user for creation of BPF maps and programs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-07 13:22:26 -05:00
..
arraymap.c bpf: Add bpf_current_task_under_cgroup helper 2016-08-12 21:49:41 -07:00
core.c bpf: clean up put_cpu_var usage 2016-09-27 22:09:17 -04:00
hashtab.c bpf: fix htab map destruction when extra reserve is in use 2016-11-07 13:20:52 -05:00
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: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
stackmap.c bpf: add BPF_CALL_x macros for declaring helpers 2016-09-09 19:36:04 -07:00
syscall.c bpf: fix map not being uncharged during map creation failure 2016-11-07 13:22:26 -05:00
verifier.c bpf: allow access into map value arrays 2016-09-29 01:35:35 -04:00