gen_confirm() generates a unique identifier based on the current time. This overflows in year 2038, but that is harmless since it generally does not lead to duplicates, as long as the time has been initialized by a real-time clock or NTP. Using ktime_get_boottime_seconds() or ktime_get_seconds() would avoid the overflow, but it would be more likely to result in non-unique numbers. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- fs/nfsd/nfs4state.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6afdef63f6d7..efe3161f6cf7 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2215,7 +2215,7 @@ static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) * This is opaque to client, so no need to byte-swap. Use * __force to keep sparse happy */ - verf[0] = (__force __be32)get_seconds(); + verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); verf[1] = (__force __be32)nn->clverifier_counter++; memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); } -- 2.20.0
