Messages in this thread | | | Subject | Re: WARNING: CPU: 26 PID: 64391 at lib/vsprintf.c:2193 set_precision+0x84/0x90 | From | Qian Cai <> | Date | Wed, 14 Nov 2018 15:35:22 -0500 |
| |
On Tue, 2018-11-13 at 14:23 -0500, Steven Rostedt wrote: > On Tue, 13 Nov 2018 13:58:18 -0500 > Qian Cai <cai@gmx.us> wrote: > > > > Care to print the len and name parameters before this line? > > > > len = 60612; name = > > How big are pages on arm64? Because we shouldn't get to this path if # getconf PAGESIZE 65536 > the string is bigger than PAGE_SIZE. But I know that on PPC64, > PAGE_SIZE can be 64K, and 60612 is less than that. Thus, if we get > there, the test is against signed int:16 (16 bit signed integer) that > can go up to most 32768. If the string size is bigger than that, you > would get this error. > > I would just say to ignore it. The only thing that can happen if > someone does this is to trigger the warning. Unless if it is considered > a form of DOS, where userspace just bombards the console by triggering > this waring. But I don't see a problem with the actual design. There's > no reason we should be processing string variables bigger than 32768 in > vsprintf. > > -- Steve > > > > %d%d%d%d%d%d%s%s%s%d%s%d%d%d%s%s%s%s%s%d%s%d%s%s%s%d%s%d%d%s%s%d%s%s%d%d%s%s > > %s%s > > %s%d%s%d%d%s%s%s%d%d%d%d%d%s%s%s%s%d%s%s%s%s%d%d%d%d%d%d%d%s%s%s%s%d%s%d%s%d > > %s%d > > %s%s%d%s%d%s%s%s%s%d%s%d%s%s%d%d%s%s%d%s%d%s%s%d%s%d%d%s%s%s%s%d%s%s%s%s%d%d > > %s%s > > %s%d%s%d%s%s%d%d%d%d%d%s%s%s%s%s%s%s%d%d%d%s%d%s%d%d%s%d%d%d%s%s%d%d%d%s%s%d > > %s%d > > %s%s%s%d%d%d%s%d%s%s%d%s%d%s%s%d%s%d%d%s%d%s%s%d%s%s%s%s%s%d%s%d%d%d%s%d%d%d > > %d%s > > %d%s%d%d%d%s%s%s%s%s%d%s%s%s%s%d%d%d%s%d%s%d%d%s%d%s%s%d%d%d%s%d%s%d%d%s%s%s > > %d%s > > %s%d%d%d%d%d%d%d%d%d%d%s%d%s%d%s%d%d%s%d%d%s%d%s%s%s%d%d%d%d%s%s%d%d%s%d%d%d > > %s%d > > %d%s%d%d%d%d%s%s%d%s%s%d%d%d%s%s%s%s%s%s%s%s%s%d%s%d%d%s%d%s%s%d%s%s%s%s%d%d > > %d%d > > %s%d%s%s%d%d%d%s%d%d%d%s%s%s%s%d%d%d%s%d%s%d%s%d%d%d%d%d%d%d%d%d%d%s%s%d%d%d > > %s%d > > %d%d%s%s%s%s%s%s%s%d%d%d%d%s%s%d%s%s%d%s%s%s%s%d%d%s%d%d%s%d%d%s%d%d%d%s%s%s > > %s%d > > %s%s%d%s%d%s%d%s%d%d%d%d%s%d%d%d%s%d%d%d%d%s%s%d%s%s%d%d%d%s%d%s%d%d%d%d%d%d > > %s%d > > %s%s%d%d%s%d%d%d%s%s%d%s%d%s%d%s%d%d%s%d%s%s%s%s%s%d%s%s%d%d%d%s%s%d%d%s%s%d > > %s%d > > %s%d%s%s%s% > > [ 833.044728] ------------[ cut here ]------------ > > [ 833.137184] precision 60612 too large > > >
| |