Re: port-mips/60780 (UBSan complains about left-shifting outside of int type range)

["Alexander Schreiber via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR port-mips/60780; it has been noted by GNATS.

From: Alexander Schreiber <als%thangorodrim.ch@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: port-mips-maintainer%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
	gnats-admin%netbsd.org@localhost, skrll%netbsd.org@localhost
Subject: Re: port-mips/60780 (UBSan complains about left-shifting outside of
 int type range)
Date: Sun, 27 Sep 2026 00:02:50 +0200

 On Fri, Sep 25, 2026 at 06:30:38AM +0000, skrll%NetBSD.org@localhost wrote:
 > Synopsis: UBSan complains about left-shifting outside of int type range
 > 
 > State-Changed-From-To: open->pending-pullups
 > State-Changed-By: skrll%NetBSD.org@localhost
 > State-Changed-When: Fri, 25 Sep 2026 06:30:38 +0000
 > State-Changed-Why:
 > [pullup-11 #497] PR/60780 (UBSan complains about left-shifting outside of int type range)
 
 I build a new kernel from HEAD/20260925044118Z and found a few more of those:
 
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/lib/libkern/../../../common/lib/libc/string/memset2.c:104:15, left shift of 4294967295 by 32 places cannot be represented in type 'long int'
 
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:560:22, left shift of 1 by 31 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:3312:46, left shift of 65535 by 16 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:3314:44, left shift of 65535 by 16 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:3435:34, left shift of 65535 by 16 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:458:12, left shift of 1 by 31 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1737:15, left shift of 262143 by 14 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1144:29, left shift of 65535 by 16 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1155:29, left shift of 65535 by 16 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1263:15, left shift of 1 by 31 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1274:14, left shift of 1 by 31 places cannot be represented in type 'int'
 [   1.0000000] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1288:22, left shift of 1 by 31 places cannot be represented in type 'int'
 
 [   1.0000030] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_coreintr.c:508:23, left shift of 1 by 31 places cannot be represented in type 'int'
 [   1.0000030] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_coreintr.c:565:16, left shift of 1 by 31 places cannot be represented in type 'int'
 
 [   1.5800090] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:1476:15, left shift of 262143 by 14 places cannot be represented in type 'int'
 [   1.6000090] UBSan: Undefined Behavior in /usr/build/HEAD_20260925044118Z/usr/src/sys/external/bsd/dwc2/dist/dwc2_core.c:2055:12, left shift of 1 by 31 places cannot be represented in type 'int'
 
 Kind regards,
            Alex.
 -- 
 "Opportunity is missed by most people because it is dressed in overalls and
  looks like work."                                      -- Thomas A. Edison