linux-kernel - Re: [syzbot] [scsi?] UBSAN: shift-out-of-bounds in sg_build

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Message-ID: <690e2e02.a70a0220.22f260.0059.GAE@google.com>
Date: Fri, 07 Nov 2025 09:36:02 -0800
From: syzbot <syzbot+270f1c719ee7baab9941@...kaller.appspotmail.com>
To: kshitijvparanjape@...il.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [scsi?] UBSAN: shift-out-of-bounds in sg_build_indirect

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

././include/linux/compiler_types.h:603:45: error: call to '__compiletime_assert_1195' declared with attribute error: max(((1UL) << 12), size) signedness error

Tested on:

commit:         da32d155 Merge tag 'gpio-fixes-for-v6.18-rc5' of git:/..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=40c8b8384bc47ab0
dashboard link: https://syzkaller.appspot.com/bug?extid=270f1c719ee7baab9941
compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=16cd7012580000