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[iproute2,1/2] lib: bpf_legacy: treat 0 as a valid file descriptor

Message ID 687987edcaa38f7b069a922b45e696a929e387b5.1618839527.git.aclaudi@redhat.com (mailing list archive)
State Accepted
Delegated to: Stephen Hemminger
Headers show
Series lib: bpf_legacy: some misc fixes | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Andrea Claudi April 19, 2021, 1:49 p.m. UTC
As stated in the man page(), open returns a non-negative integer as a
file descriptor. Hence, when checking for its return value to be ok, we
should include 0 as a valid value.

This fixes a covscan warning about a missing close() in this function.

Fixes: ecb05c0f997d ("bpf: improve error reporting around tail calls")
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
---
 lib/bpf_legacy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/lib/bpf_legacy.c b/lib/bpf_legacy.c
index 8a03b9c2..7ff10e4f 100644
--- a/lib/bpf_legacy.c
+++ b/lib/bpf_legacy.c
@@ -2832,7 +2832,7 @@  static void bpf_get_cfg(struct bpf_elf_ctx *ctx)
 	int fd;
 
 	fd = open(path_jit, O_RDONLY);
-	if (fd > 0) {
+	if (fd >= 0) {
 		char tmp[16] = {};
 
 		if (read(fd, tmp, sizeof(tmp)) > 0)