linux-kernel - Re: [CRASH][BISECTED] 6.4.1 crash in boot

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Date:   Mon, 3 Jul 2023 08:44:37 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux LLVM <llvm@...ts.linux.dev>
Cc:     linux-kbuild@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Linux Regressions <regressions@...t.linux.dev>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [CRASH][BISECTED] 6.4.1 crash in boot

On Sun, Jul 02, 2023 at 06:36:12PM +0200, Mirsad Goran Todorovac wrote:
> Hi,
> 
> After new git pull the kernel in Torvalds tree with default debug config
> failed to boot with error that occurs prior to mounting filesystems, so there
> is no log safe for the screenshot(s) here:
> 
> [1] https://domac.alu.unizg.hr/~mtodorov/linux/crashes/2023-07-02/
> 
> Bisect shows the first bad commit is 2d47c6956ab3 (v6.4-rc2-1-g2d47c6956ab3):
> 
> # good: [98be618ad03010b1173fc3c35f6cbb4447ee2b07] Merge tag 'Smack-for-6.5' of https://github.com/cschaufler/smack-next
> git bisect good 98be618ad03010b1173fc3c35f6cbb4447ee2b07
> # bad: [f4a0659f823e5a828ea2f45b4849ea8e2dd2984c] drm/i2c: tda998x: Replace all non-returning strlcpy with strscpy
> git bisect bad f4a0659f823e5a828ea2f45b4849ea8e2dd2984c
> .
> .
> .
> # bad: [2d47c6956ab3c8b580a59d7704aab3e2a4882b6c] ubsan: Tighten UBSAN_BOUNDS on GCC
> git bisect bad 2d47c6956ab3c8b580a59d7704aab3e2a4882b6c
> # first bad commit: [2d47c6956ab3c8b580a59d7704aab3e2a4882b6c] ubsan: Tighten UBSAN_BOUNDS on GCC
> 
> The architecture is Ubuntu 22.04 with lshw and config give in the attachment.

Can you show early kernel log (something like dmesg)?

Anyway, I'm adding it to regzbot:

#regzbot ^introduced: 2d47c6956ab3c8
#regzbot title: Linux kernel fails to boot due to UBSAN_BOUNDS tightening

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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