Andrey Vagin 98bbc06aab net: x86: bpf: don't forget to free sk_filter (v2) ... sk_filter isn't freed if bpf_func is equal to sk_run_filter. This memory leak was introduced by v3.12-rc3-224-gd45ed4a4 "net: fix unsafe set_memory_rw from softirq". Before this patch sk_filter was freed in sk_filter_release_rcu, now it should be freed in bpf_jit_free. Here is output of kmemleak: unreferenced object 0xffff8800b774eab0 (size 128): comm "systemd", pid 1, jiffies 4294669014 (age 124.062s) hex dump (first 32 bytes): 00 00 00 00 0b 00 00 00 20 63 7f b7 00 88 ff ff ........ c...... 60 d4 55 81 ff ff ff ff 30 d9 55 81 ff ff ff ff `.U.....0.U..... backtrace: [<ffffffff816444be>] kmemleak_alloc+0x4e/0xb0 [<ffffffff811845af>] __kmalloc+0xef/0x260 [<ffffffff81534028>] sock_kmalloc+0x38/0x60 [<ffffffff8155d4dd>] sk_attach_filter+0x5d/0x190 [<ffffffff815378a1>] sock_setsockopt+0x991/0x9e0 [<ffffffff81531bd6>] SyS_setsockopt+0xb6/0xd0 [<ffffffff8165f3e9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff v2: add extra { } after else Fixes: d45ed4a4e3 ("net: fix unsafe set_memory_rw from softirq") Acked-by: Daniel Borkmann <dborkman@redhat.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Eric Dumazet <edumazet@google.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrey Vagin <avagin@openvz.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-11-07 19:06:52 -05:00
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bpf_jit_comp.c	net: x86: bpf: don't forget to free sk_filter (v2)	2013-11-07 19:06:52 -05:00
bpf_jit.S
Makefile