xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: bpf: be friendly to kmemcheck

Browse Source 
Reported by Mikulas Patocka, kmemcheck currently barks out a
false positive since we don't have special kmemcheck annotation
for bitfields used in bpf_prog structure.

We currently have jited:1, len:31 and thus when accessing len
while CONFIG_KMEMCHECK enabled, kmemcheck throws a warning that
we're reading uninitialized memory.

As we don't need the whole bit universe for pages member, we
can just split it to u16 and use a bool flag for jited instead
of a bitfield.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2014-09-08 08:04:49 +02:00
committed by David S. Miller
parent 55309dd3d4
commit 286aad3c40
8 changed files with 10 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
net/core/filter.c
View File

@@ -972,7 +972,7 @@ static struct bpf_prog *bpf_prepare_filter(struct bpf_prog *fp)
int err;
fp->bpf_func = NULL;
fp->jited = 0;
fp->jited = false;
err = bpf_check_classic(fp->insns, fp->len);
if (err) {