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| author | Jeremy Cline <jcline@redhat.com> | 2020-04-04 01:14:30 -0400 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-04-06 21:51:54 +0200 |
| commit | 4734b0fefbbf98f8c119eb8344efa19dac82cd2c (patch) | |
| tree | 6a5980fc15d7fd3a471f781547370420f5a5a932 /tools | |
| parent | db5c97f02373917efe2c218ebf8e3d8b19e343b6 (diff) | |
| download | linux-4734b0fefbbf98f8c119eb8344efa19dac82cd2c.tar.gz linux-4734b0fefbbf98f8c119eb8344efa19dac82cd2c.tar.bz2 linux-4734b0fefbbf98f8c119eb8344efa19dac82cd2c.zip | |
libbpf: Initialize *nl_pid so gcc 10 is happy
Builds of Fedora's kernel-tools package started to fail with "may be
used uninitialized" warnings for nl_pid in bpf_set_link_xdp_fd() and
bpf_get_link_xdp_info() on the s390 architecture.
Although libbpf_netlink_open() always returns a negative number when it
does not set *nl_pid, the compiler does not determine this and thus
believes the variable might be used uninitialized. Assuage gcc's fears
by explicitly initializing nl_pid.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1807781
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200404051430.698058-1-jcline@redhat.com
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/netlink.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c index 18b5319025e1..9a14694176de 100644 --- a/tools/lib/bpf/netlink.c +++ b/tools/lib/bpf/netlink.c @@ -142,7 +142,7 @@ static int __bpf_set_link_xdp_fd_replace(int ifindex, int fd, int old_fd, struct ifinfomsg ifinfo; char attrbuf[64]; } req; - __u32 nl_pid; + __u32 nl_pid = 0; sock = libbpf_netlink_open(&nl_pid); if (sock < 0) @@ -288,7 +288,7 @@ int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info, { struct xdp_id_md xdp_id = {}; int sock, ret; - __u32 nl_pid; + __u32 nl_pid = 0; __u32 mask; if (flags & ~XDP_FLAGS_MASK || !info_size) |