linux-hardening - Re: [PATCH v2] lib/test_ubsan.c: Fix panic from test_ubsan_out_of

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Message-Id: <174475000897.3429336.4470350657359091880.b4-ty@kernel.org>
Date: Tue, 15 Apr 2025 13:46:51 -0700
From: Kees Cook <kees@...nel.org>
To: linux-kernel@...r.kernel.org,
	kasan-dev@...glegroups.com,
	linux-hardening@...r.kernel.org,
	Mostafa Saleh <smostafa@...gle.com>
Cc: Kees Cook <kees@...nel.org>,
	akpm@...ux-foundation.org,
	elver@...gle.com,
	andreyknvl@...il.com,
	ryabinin.a.a@...il.com
Subject: Re: [PATCH v2] lib/test_ubsan.c: Fix panic from test_ubsan_out_of_bounds

On Tue, 15 Apr 2025 20:33:54 +0000, Mostafa Saleh wrote:
> Running lib_ubsan.ko on arm64 (without CONFIG_UBSAN_TRAP) panics the
> kernel
> 
> [   31.616546] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: test_ubsan_out_of_bounds+0x158/0x158 [test_ubsan]
> [   31.646817] CPU: 3 UID: 0 PID: 179 Comm: insmod Not tainted 6.15.0-rc2 #1 PREEMPT
> [   31.648153] Hardware name: linux,dummy-virt (DT)
> [   31.648970] Call trace:
> [   31.649345]  show_stack+0x18/0x24 (C)
> [   31.650960]  dump_stack_lvl+0x40/0x84
> [   31.651559]  dump_stack+0x18/0x24
> [   31.652264]  panic+0x138/0x3b4
> [   31.652812]  __ktime_get_real_seconds+0x0/0x10
> [   31.653540]  test_ubsan_load_invalid_value+0x0/0xa8 [test_ubsan]
> [   31.654388]  init_module+0x24/0xff4 [test_ubsan]
> [   31.655077]  do_one_initcall+0xd4/0x280
> [   31.655680]  do_init_module+0x58/0x2b4
> 
> [...]

Applied to for-linus/hardening, thanks!

[1/1] lib/test_ubsan.c: Fix panic from test_ubsan_out_of_bounds
      https://git.kernel.org/kees/c/7fd007c84e4b

Take care,

-- 
Kees Cook