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d="scan'208";a="224180071" Received: from administrator-system-product-name.igk.intel.com ([10.91.214.181]) by fmviesa009.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2026 02:17:59 -0700 Date: Thu, 16 Apr 2026 11:17:56 +0200 (CEST) From: =?ISO-8859-2?Q?Micha=B3_Grzelak?= To: Oliver Sang In-Reply-To: Message-ID: <2df6f595-da57-0668-951c-657c5c876333@intel.com> References: <20260331183332.1773886-16-michal.grzelak@intel.com> <202604150702.d409a2b6-lkp@intel.com> <20260416064051.GA281695@pevik> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 1.0.9 at in-2.smtp.seeweb.it X-Virus-Status: Clean X-Mailman-Approved-At: Thu, 16 Apr 2026 12:41:32 +0200 X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: Re: [LTP] [PATCH v1 15/16] drm/i915/bios: search for VBT #57 by default X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lkp@intel.com, intel-gfx@lists.freedesktop.org, Jani Nikula , oe-lkp@lists.linux.dev, linux-integrity@vger.kernel.org, =?ISO-8859-2?Q?Micha=B3_Grzelak?= , intel-xe@lists.freedesktop.org, ltp@lists.linux.it Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-2"; Format="flowed" Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi Petr & Oliver, On Thu, 16 Apr 2026, Oliver Sang wrote: > hi, Petr, > > On Thu, Apr 16, 2026 at 08:40:51AM +0200, Petr Vorel wrote: >> Hi all, >> >> [ Cc Mimi and linux-integrity ] >>> Hello, >> >>> kernel test robot noticed "BUG:KASAN:slab-out-of-bounds_in_parse_vswing= _preemph_snps" on: >> >>> commit: 07d1ee54da4966c1457602dc088a8a43b29254cb ("[PATCH v1 15/16] drm= /i915/bios: search for VBT #57 by default") >>> url: https://github.com/intel-lab-lkp/linux/commits/Micha-Grzelak/drm-i= 915-lt-align-xe3plpd-with-VS-PE-Override-layout/20260401-092928 >>> base: https://gitlab.freedesktop.org/drm/i915/kernel.git for-linux-next >>> patch link: https://lore.kernel.org/all/20260331183332.1773886-16-micha= l.grzelak@intel.com/ >>> patch subject: [PATCH v1 15/16] drm/i915/bios: search for VBT #57 by de= fault >> >>> in testcase: ltp >>> version: >>> with following parameters: >> >>> test: ima >> >> >> >>> config: x86_64-rhel-9.4-ltp >>> compiler: gcc-14 >>> test machine: 22 threads 1 sockets Intel(R) Core(TM) Ultra 9 185H @ 4.5= GHz (Meteor Lake) with 32G memory >> >>> (please refer to attached dmesg/kmsg for entire log/backtrace) >> >> >> >>> If you fix the issue in a separate patch/commit (i.e. not just a new ve= rsion of >>> the same patch/commit), kindly add following tags >>> | Reported-by: kernel test robot >>> | Closes: https://lore.kernel.org/oe-lkp/202604150702.d409a2b6-lkp@inte= l.com >> >> >>> The kernel config and materials to reproduce are available at: >>> https://download.01.org/0day-ci/archive/20260415/202604150702.d409a2b6-= lkp@intel.com >> >> >>> kern :err : [ 27.966990] [ T399] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D >>> kern :err : [ 27.968126] [ T399] BUG: KASAN: slab-out-of-bounds= in parse_vswing_preemph_snps+0x2dd/0x430 [i915] >>> kern :err : [ 27.969712] [ T399] Read of size 4 at addr ffff888= 1eba2c49d by task (udev-worker)/399 >> >>> kern :err : [ 27.971135] [ T399] CPU: 4 UID: 0 PID: 399 Comm: (= udev-worker) Tainted: G S 7.0.0-rc4-01496-g07d1ee54da49 #1= PREEMPT(lazy) >>> kern :err : [ 27.971139] [ T399] Tainted: [S]=3DCPU_OUT_OF_SPEC >>> kern :err : [ 27.971140] [ T399] Hardware name: ASUSTeK COMPUTE= R INC. NUC14RVS-B/NUC14RVSU9, BIOS RVMTL357.0047.2025.0108.1408 01/08/2025 >>> kern :err : [ 27.971142] [ T399] Call Trace: >>> kern :err : [ 27.971144] [ T399] >>> kern :err : [ 27.971145] [ T399] dump_stack_lvl+0x47/0x70 >>> kern :err : [ 27.971152] [ T399] print_address_description+0x8= 8/0x320 >>> kern :err : [ 27.971156] [ T399] ? parse_vswing_preemph_snps+0= x2dd/0x430 [i915] >>> kern :err : [ 27.971355] [ T399] print_report+0x106/0x1f4 >>> kern :err : [ 27.971357] [ T399] ? __virt_addr_valid+0xc4/0x230 >>> kern :err : [ 27.971360] [ T399] ? parse_vswing_preemph_snps+0= x2dd/0x430 [i915] >>> kern :err : [ 27.971533] [ T399] kasan_report+0xb5/0xf0 >>> kern :err : [ 27.971537] [ T399] ? parse_vswing_preemph_snps+0= x2dd/0x430 [i915] >>> kern :err : [ 27.971704] [ T399] parse_vswing_preemph_snps+0x2= dd/0x430 [i915] >>> kern :err : [ 27.971868] [ T399] intel_bios_init+0xcc1/0x14b0 = [i915] >>> kern :err : [ 27.972042] [ T399] ? drm_vblank_init+0x147/0x330= [drm] >>> kern :err : [ 27.972105] [ T399] intel_display_driver_probe_no= irq+0x8d/0x870 [i915] >>> kern :err : [ 27.972295] [ T399] i915_driver_probe+0x209/0x9f0= [i915] >>> kern :err : [ 27.972445] [ T399] ? __pfx_mutex_lock+0x10/0x10 >>> kern :err : [ 27.972450] [ T399] ? mutex_lock+0x91/0xf0 >>> kern :err : [ 27.972451] [ T399] ? __pfx_i915_driver_probe+0x1= 0/0x10 [i915] >>> kern :err : [ 27.972597] [ T399] ? drm_privacy_screen_get+0x2b= f/0x370 [drm] >>> kern :err : [ 27.972628] [ T399] ? intel_display_driver_probe_= defer+0x41/0x70 [i915] >>> kern :err : [ 27.972814] [ T399] ? i915_pci_probe+0x2ab/0x3b0 = [i915] >>> kern :err : [ 27.972963] [ T399] ? __pfx_i915_pci_probe+0x10/0= x10 [i915] >>> kern :err : [ 27.973110] [ T399] local_pci_probe+0xdb/0x1b0 >>> kern :err : [ 27.973114] [ T399] pci_call_probe+0x153/0x4f0 >>> kern :err : [ 27.973116] [ T399] ? __pfx_pci_call_probe+0x10/0= x10 >>> kern :err : [ 27.973117] [ T399] ? __pfx__raw_spin_lock+0x10/0= x10 >>> kern :err : [ 27.973119] [ T399] ? pci_assign_irq+0x80/0x2f0 >>> kern :err : [ 27.973121] [ T399] ? pci_match_device+0x38d/0x6b0 >>> kern :err : [ 27.973123] [ T399] ? kernfs_create_link+0x164/0x= 230 >>> kern :err : [ 27.973127] [ T399] pci_device_probe+0x173/0x2f0 >>> kern :err : [ 27.973128] [ T399] call_driver_probe+0x62/0x1f0 >>> kern :err : [ 27.973132] [ T399] really_probe+0x197/0x770 >>> kern :err : [ 27.973134] [ T399] __driver_probe_device+0x18c/0= x3b0 >>> kern :err : [ 27.973137] [ T399] driver_probe_device+0x4a/0x130 >>> kern :err : [ 27.973139] [ T399] __driver_attach+0x18c/0x4f0 >>> kern :err : [ 27.973141] [ T399] ? __pfx___driver_attach+0x10/= 0x10 >>> kern :err : [ 27.973143] [ T399] bus_for_each_dev+0xef/0x170 >>> kern :err : [ 27.973145] [ T399] ? kasan_unpoison+0x40/0x70 >>> kern :err : [ 27.973147] [ T399] ? __pfx_bus_for_each_dev+0x10= /0x10 >>> kern :err : [ 27.973149] [ T399] ? __kasan_slab_alloc+0x2f/0x70 >>> kern :err : [ 27.973152] [ T399] ? klist_add_tail+0x132/0x270 >>> kern :err : [ 27.973154] [ T399] bus_add_driver+0x2a7/0x4f0 >>> kern :err : [ 27.973156] [ T399] driver_register+0x1a1/0x370 >>> kern :err : [ 27.973158] [ T399] i915_init+0x57/0x160 [i915] >>> kern :err : [ 27.973307] [ T399] ? __pfx_i915_init+0x10/0x10 [= i915] >>> kern :err : [ 27.973453] [ T399] do_one_initcall+0x8d/0x3f0 >>> kern :err : [ 27.973455] [ T399] ? __pfx_do_one_initcall+0x10/= 0x10 >>> kern :err : [ 27.973457] [ T399] ? kasan_unpoison+0x3b/0x70 >>> kern :err : [ 27.973458] [ T399] ? kasan_unpoison+0x40/0x70 >>> kern :err : [ 27.973460] [ T399] do_init_module+0x281/0x830 >>> kern :err : [ 27.973463] [ T399] ? __pfx_do_init_module+0x10/0= x10 >>> kern :err : [ 27.973464] [ T399] ? kfree+0x195/0x430 >>> kern :err : [ 27.973467] [ T399] load_module+0x173d/0x2070 >>> kern :err : [ 27.973469] [ T399] ? ima_post_read_file+0x18f/0x= 230 >> >> I'm surprised, but indeed it's could be triggered by IMA. >> >> Looking at full dmesg [1] I'm surprised that this is triggered before te= sts are >> actually run and there is no IMA specific kernel command line parameter.= That >> means that error is not related to any LTP test. >> >> Is it always reproducible or just a random glitch? > > in our tests, it's quite persistent and clean on parent: I haven't reproduced it myself, but this issue seems somewhat related with issue observed earlier by CI [1]. I would expect it to not be a random glitch but a true bug related to the series. In previous versions of the series, during parsing there was a unfortunate snippet of: + const u32 *tables =3D block->tables; + size_t offset =3D 0; + size_t row_width; + const u32 *vals; + + row_width =3D block->num_columns * sizeof(*tables); + + for (int idx =3D 0; idx < block->num_tables; idx++) { + for (int row =3D 0; row < num_rows; row++) { + vals =3D &tables[offset]; [...] + offset +=3D row_width; + } + } Which caused hopping by 4 times more bytes than it should, because the sizeof() wasn't meant to be there. Since parsing takes place at module load, looks like it could be the issue. This seems especially convincing given that report is from parse_vswing_preemph_snps(). I have to also admit that it would be consistent with review comment from Sashiko [2]. Lastly, sadly due to poorly split commits, 15th patch from v1 turned on whole VBT #57 searching. This probably caused bisect to point at 15th patch instead of pointing at patch adding parsing code, which would clearly show that patch/es introduce/s the bug. Anyways, now the bug should be fixed in v2 [3]. [1] https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_164196v1/fi-hsw-4770= /dmesg0.txt = [2] https://sashiko.dev/#/patchset/20260331183332.1773886-1-michal.grzelak%= 40intel.com?part=3D5 = [3] https://lore.kernel.org/intel-gfx/20260415234639.3577774-21-michal.grze= lak@intel.com/ BR, Micha=B3 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > tbox_group/testcase/rootfs/kconfig/compiler/test: > igk-mtl-nuc02/ltp/debian-13-x86_64-20250902.cgz/x86_64-rhel-9.4-ltp/gcc-= 14/ima > > e3d53a63657f3213 07d1ee54da4966c1457602dc088 > ---------------- --------------------------- > fail:runs %reproduction fail:runs > | | | > :6 100% 6:6 dmesg.BUG:KASAN:slab-out-of-= bounds_in_parse_vswing_preemph_snps > > >> >> ima_post_read_file() is a part of IMA core therefore issue might be not = related >> to any config, but just FYI kernel config [2]. >> >> Kind regards, >> Petr >> >> [1] https://download.01.org/0day-ci/archive/20260415/202604150702.d409a2= b6-lkp@intel.com/kmsg.xz >> [2] https://download.01.org/0day-ci/archive/20260415/202604150702.d409a2= b6-lkp@intel.com/config-7.0.0-rc4-01496-g07d1ee54da49 >> >>> kern :err : [ 27.973474] [ T399] ? __pfx_load_module+0x10/0x10 >>> kern :err : [ 27.973476] [ T399] ? security_kernel_post_read_f= ile+0x35/0xf0 >>> kern :err : [ 27.973479] [ T399] ? __pfx_kernel_read_file+0x10= /0x10 >>> kern :err : [ 27.973483] [ T399] ? __pfx_current_time+0x10/0x10 >>> kern :err : [ 27.973486] [ T399] ? init_module_from_file+0x157= /0x1b0 >>> kern :err : [ 27.973487] [ T399] init_module_from_file+0x157/0= x1b0 >>> kern :err : [ 27.973489] [ T399] ? __pfx_init_module_from_file= +0x10/0x10 >>> kern :err : [ 27.973491] [ T399] ? touch_atime+0x1bc/0x4f0 >>> kern :err : [ 27.973493] [ T399] ? _raw_spin_lock+0x80/0xf0 >>> kern :err : [ 27.973494] [ T399] ? __pfx__raw_spin_lock+0x10/0= x10 >>> kern :err : [ 27.973496] [ T399] ? __pfx_filemap_read+0x10/0x10 >>> kern :err : [ 27.973498] [ T399] ? do_sys_openat2+0xeb/0x170 >>> kern :err : [ 27.973501] [ T399] idempotent_init_module+0x21c/= 0x770 >>> kern :err : [ 27.973503] [ T399] ? __pfx_idempotent_init_modul= e+0x10/0x10 >>> kern :err : [ 27.973505] [ T399] ? fdget+0x54/0x3b0 >>> kern :err : [ 27.973506] [ T399] ? security_capable+0x35/0xf0 >>> kern :err : [ 27.973509] [ T399] __x64_sys_finit_module+0xca/0= x170 >>> kern :err : [ 27.973511] [ T399] do_syscall_64+0x108/0x5b0 >>> kern :err : [ 27.973513] [ T399] ? vfs_read+0x3be/0x9b0 >>> kern :err : [ 27.973514] [ T399] ? vfs_read+0x3be/0x9b0 >>> kern :err : [ 27.973516] [ T399] ? __pfx_vfs_read+0x10/0x10 >>> kern :err : [ 27.973517] [ T399] ? __pfx__raw_spin_lock+0x10/0= x10 >>> kern :err : [ 27.973519] [ T399] ? fdget+0x54/0x3b0 >>> kern :err : [ 27.973520] [ T399] ? __pfx___seccomp_filter+0x10= /0x10 >>> kern :err : [ 27.973523] [ T399] ? __x64_sys_pread64+0x18d/0x1= f0 >>> kern :err : [ 27.973525] [ T399] ? __pfx___x64_sys_pread64+0x1= 0/0x10 >>> kern :err : [ 27.973526] [ T399] ? fdget+0x54/0x3b0 >>> kern :err : [ 27.973528] [ T399] ? security_capable+0x35/0xf0 >>> kern :err : [ 27.973530] [ T399] ? do_syscall_64+0x140/0x5b0 >>> kern :err : [ 27.973531] [ T399] ? arch_exit_to_user_mode_prep= are+0x9e/0xf0 >>> kern :err : [ 27.973533] [ T399] ? do_syscall_64+0x140/0x5b0 >>> kern :err : [ 27.973534] [ T399] ? __x64_sys_openat+0x104/0x1f0 >>> kern :err : [ 27.973536] [ T399] ? __pfx___x64_sys_openat+0x10= /0x10 >>> kern :err : [ 27.973538] [ T399] ? do_syscall_64+0x140/0x5b0 >>> kern :err : [ 27.973540] [ T399] ? do_syscall_64+0x140/0x5b0 >>> kern :err : [ 27.973541] [ T399] ? irqentry_exit+0x76/0x4f0 >>> kern :err : [ 27.973544] [ T399] entry_SYSCALL_64_after_hwfram= e+0x76/0x7e >>> kern :err : [ 27.973546] [ T399] RIP: 0033:0x7f3689aa8779 >>> kern :err : [ 27.973549] [ T399] Code: ff c3 66 2e 0f 1f 84 00 = 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d = 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 67 76 0d 0= 0 f7 d8 64 89 01 48 >>> kern :err : [ 27.973551] [ T399] RSP: 002b:00007ffca3326338 EFL= AGS: 00000246 ORIG_RAX: 0000000000000139 >>> kern :err : [ 27.973555] [ T399] RAX: ffffffffffffffda RBX: 000= 055c94afdd3e0 RCX: 00007f3689aa8779 >>> kern :err : [ 27.973556] [ T399] RDX: 0000000000000000 RSI: 000= 07f36882ae44d RDI: 0000000000000053 >>> kern :err : [ 27.973557] [ T399] RBP: 0000000000000000 R08: 000= 0000000000000 R09: 000055c94af65b30 >>> kern :err : [ 27.973558] [ T399] R10: 0000000000000000 R11: 000= 0000000000246 R12: 00007f36882ae44d >>> kern :err : [ 27.973559] [ T399] R13: 0000000000020000 R14: 000= 055c94afb65f0 R15: 0000000000000000 >>> kern :err : [ 27.973561] [ T399] >> >>> kern :err : [ 28.051757] [ T399] Allocated by task 399: >>> kern :warn : [ 28.052350] [ T399] kasan_save_stack+0x1e/0x70 >>> kern :warn : [ 28.053001] [ T399] kasan_save_track+0x10/0x30 >>> kern :warn : [ 28.053646] [ T399] __kasan_kmalloc+0x8b/0xb0 >>> kern :warn : [ 28.054278] [ T399] __kmalloc_noprof+0x1d8/0x5f0 >>> kern :warn : [ 28.054944] [ T399] init_bdb_block+0x128/0xc30 [i= 915] >>> kern :warn : [ 28.055915] [ T399] intel_bios_init+0x4de/0x14b0 = [i915] >>> kern :warn : [ 28.056854] [ T399] intel_display_driver_probe_no= irq+0x8d/0x870 [i915] >>> kern :warn : [ 28.057984] [ T399] i915_driver_probe+0x209/0x9f0= [i915] >>> kern :warn : [ 28.058917] [ T399] local_pci_probe+0xdb/0x1b0 >>> kern :warn : [ 28.059565] [ T399] pci_call_probe+0x153/0x4f0 >>> kern :warn : [ 28.060210] [ T399] pci_device_probe+0x173/0x2f0 >>> kern :warn : [ 28.060878] [ T399] call_driver_probe+0x62/0x1f0 >>> kern :warn : [ 28.061547] [ T399] really_probe+0x197/0x770 >>> kern :warn : [ 28.062168] [ T399] __driver_probe_device+0x18c/0= x3b0 >>> kern :warn : [ 28.062894] [ T399] driver_probe_device+0x4a/0x130 >>> kern :warn : [ 28.063587] [ T399] __driver_attach+0x18c/0x4f0 >>> kern :warn : [ 28.064243] [ T399] bus_for_each_dev+0xef/0x170 >>> kern :warn : [ 28.064898] [ T399] bus_add_driver+0x2a7/0x4f0 >>> kern :warn : [ 28.065543] [ T399] driver_register+0x1a1/0x370 >>> kern :warn : [ 28.066202] [ T399] i915_init+0x57/0x160 [i915] >>> kern :warn : [ 28.067030] [ T399] do_one_initcall+0x8d/0x3f0 >>> kern :warn : [ 28.067677] [ T399] do_init_module+0x281/0x830 >>> kern :warn : [ 28.068320] [ T399] load_module+0x173d/0x2070 >>> kern :warn : [ 28.068951] [ T399] init_module_from_file+0x157/0= x1b0 >>> kern :warn : [ 28.069678] [ T399] idempotent_init_module+0x21c/= 0x770 >>> kern :warn : [ 28.070417] [ T399] __x64_sys_finit_module+0xca/0= x170 >>> kern :warn : [ 28.071143] [ T399] do_syscall_64+0x108/0x5b0 >>> kern :warn : [ 28.071777] [ T399] entry_SYSCALL_64_after_hwfram= e+0x76/0x7e >> >>> kern :err : [ 28.072915] [ T399] The buggy address belongs to t= he object at ffff8881eba2c000 >>> which belongs to the cache km= alloc-2k of size 2048 >>> kern :err : [ 28.074832] [ T399] The buggy address is located 0= bytes to the right of >>> allocated 1181-byte region [f= fff8881eba2c000, ffff8881eba2c49d) >> >>> kern :err : [ 28.077135] [ T399] The buggy address belongs to t= he physical page: >>> kern :warn : [ 28.078017] [ T399] page: refcount:0 mapcount:0 ma= pping:0000000000000000 index:0x0 pfn:0x1eba28 >>> kern :warn : [ 28.079226] [ T399] head: order:3 mapcount:0 entir= e_mapcount:0 nr_pages_mapped:0 pincount:0 >>> kern :warn : [ 28.080389] [ T399] flags: 0x17ffffc0000040(head|n= ode=3D0|zone=3D2|lastcpupid=3D0x1fffff) >>> kern :warn : [ 28.081460] [ T399] page_type: f5(slab) >>> kern :warn : [ 28.082008] [ T399] raw: 0017ffffc0000040 ffff8881= 00042f00 dead000000000100 dead000000000122 >>> kern :warn : [ 28.083180] [ T399] raw: 0000000000000000 00000008= 00080008 00000000f5000000 0000000000000000 >>> kern :warn : [ 28.084355] [ T399] head: 0017ffffc0000040 ffff888= 100042f00 dead000000000100 dead000000000122 >>> kern :warn : [ 28.085541] [ T399] head: 0000000000000000 0000000= 800080008 00000000f5000000 0000000000000000 >>> kern :warn : [ 28.086725] [ T399] head: 0017ffffc0000003 ffffea0= 007ae8a01 00000000ffffffff 00000000ffffffff >>> kern :warn : [ 28.087909] [ T399] head: ffffffffffffffff 0000000= 000000000 00000000ffffffff 0000000000000008 >>> kern :warn : [ 28.089093] [ T399] page dumped because: kasan: ba= d access detected >> >>> kern :err : [ 28.090297] [ T399] Memory state around the buggy = address: >>> kern :err : [ 28.091073] [ T399] ffff8881eba2c380: 00 00 00 00= 00 00 00 00 00 00 00 00 00 00 00 00 >>> kern :err : [ 28.092175] [ T399] ffff8881eba2c400: 00 00 00 00= 00 00 00 00 00 00 00 00 00 00 00 00 >>> kern :err : [ 28.093276] [ T399] >ffff8881eba2c480: 00 00 00 05= fc fc fc fc fc fc fc fc fc fc fc fc >>> kern :err : [ 28.094376] [ T399] ^ >>> kern :err : [ 28.095041] [ T399] ffff8881eba2c500: fc fc fc fc= fc fc fc fc fc fc fc fc fc fc fc fc >>> kern :err : [ 28.096145] [ T399] ffff8881eba2c580: fc fc fc fc= fc fc fc fc fc fc fc fc fc fc fc fc >>> kern :err : [ 28.097247] [ T399] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D >>> kern :warn : [ 28.098668] [ T399] Disabling lock debugging due t= o kernel taint > -- = Mailing list info: https://lists.linux.it/listinfo/ltp