On Tue, Mar 15, 2022 at 03:57:36AM +0800, kernel test robot wrote: > In file included from net/ipv4/ipconfig.c:59: > In file included from include/linux/nfs_fs.h:31: > In file included from include/linux/sunrpc/auth.h:13: > In file included from include/linux/sunrpc/sched.h:19: > >> include/linux/sunrpc/xdr.h:734:10: warning: result of comparison of constant 4611686018427387903 with expression of type '__u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare] > if (len > ULONG_MAX / sizeof(*p)) > ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ Smatch also wanted to send this warning. I am testing a fix to silence this warning in Smatch. It looks for an some_int > some_expression where some_expression has ULONG_MAX on the far left hand side of the binop. Because the some_expression always starts with ULONG_MAX and then divides it and/or subtracts from it to get the max. regards, dan carpenter
