On Fri, Oct 07, 2022 at 02:47:41AM +0200, Stefano Brivio wrote:Coverity now noticed we're checking most lseek() return values, but not this. Not really relevant, but it doesn't hurt to check we can actually seek before reading lines. Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com>Reviewed-by: David Gibson <david(a)gibson.dropbear.id.au>--- util.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/util.c b/util.c index b366167..5b1e08a 100644 --- a/util.c +++ b/util.c @@ -311,10 +311,14 @@ void procfs_scan_listen(struct ctx *c, uint8_t proto, int ip_version, int ns, path = "/proc/net/udp6"; } - if (*fd != -1) - lseek(*fd, 0, SEEK_SET); - else if ((*fd = open(path, O_RDONLY | O_CLOEXEC)) < 0) + if (*fd != -1) { + if (lseek(*fd, 0, SEEK_SET)) { + warn("lseek() failed on %s: %s", path, strerror(errno)); + return; + } + } else if ((*fd = open(path, O_RDONLY | O_CLOEXEC)) < 0) { return; + } lineread_init(&lr, *fd); lineread_get(&lr, &line); /* throw away header */-- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson