linux-kernel - Re: Linux 6.12.4 - crash dma_alloc

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Message-ID: <c1805642a6c5da6fef3927c70358c8cb851d2784.camel@sapience.com>
Date: Tue, 10 Dec 2024 06:16:26 -0500
From: Genes Lists <lists@...ience.com>
To: Jani Nikula <jani.nikula@...ux.intel.com>, Sakari Ailus
	 <sakari.ailus@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, 
	torvalds@...ux-foundation.org, stable@...r.kernel.org, 
	linux-media@...r.kernel.org, bingbu.cao@...el.com, Rodrigo Vivi	
 <rodrigo.vivi@...el.com>, Joonas Lahtinen
 <joonas.lahtinen@...ux.intel.com>,  Tvrtko Ursulin <tursulin@...ulin.net>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org, 
	dri-devel@...ts.freedesktop.org
Subject: Re: Linux 6.12.4 - crash dma_alloc_attrs+0x12b via ipu6

On Tue, 2024-12-10 at 10:58 +0200, Jani Nikula wrote:
> On Tue, 10 Dec 2024, Sakari Ailus <sakari.ailus@...ux.intel.com>
> wrote:
> > Hi,
> > 
> > > ...
> > > FYI 6.12.4 got a crash shortly after booting in dma_alloc_attrs -
> > > maybe
> > > triggered in ipu6_probe. Crash only happened on laptop with ipu6.
> > > All
> > > other machines are running fine.
> > 
> > Have you read the dmesg further than the IPU6 related warning? The
> > IPU6
> > driver won't work (maybe not even probe?) but if the system
> > crashes, it
> > appears unlikely the IPU6 drivers would have something to do with
> > that.
> > Look for warnings on linked list corruption later, they seem to be
> > coming
> > from the i915 driver.
> 
> And the list corruption is actually happening in
> cpu_latency_qos_update_request(). I don't see any i915 changes in
> 6.12.4
> that could cause it.
> 
> I guess the question is, when did it work? Did 6.12.3 work?
> 
> 
> BR,
> Jani.


 - 6.12.1 worked

 - mainline - works (but only with i915 patch set [1] otherwise there
are no graphics at all)

    [1] https://patchwork.freedesktop.org/series/141911/

- 6.12.3 - crashed (i see i915 not ipu6) and again it has       
    cpu_latency_qos_update_request+0x61/0xc0

 CPU: 3 UID: 0 PID: 233674 Comm: kworker/3:1 Tainted: G        W      
6.12.3-stable-1 #2 b13471ff40a4c707f51ed6741af496b8675e3b0f
 Tainted: [W]=WARN
 Hardware name: Dell Inc. XPS 9320/0CR6NC, BIOS 2.16.1 09/11/2024
 Workqueue: events output_poll_execute
 RIP: 0010:__list_add_valid_or_report+0x83/0xa0
 Code: eb e9 48 89 c1 48 c7 c7 18 61 b3 ac e8 76 26 a0 ff 0f 0b eb d6
48 89 d1 48 89 c6 4c 89 c2 48 c7 c7 68 61 b3 ac e8 5d 26 a0 ff <0f> 0b
eb bd 48 89 f2 48 89 c1 48 89 fe 48 c7 c7 b8 61 b3 ac e8 44
 RSP: 0018:ffffa903b1a3f8a8 EFLAGS: 00010086
 RAX: 0000000000000000 RBX: ffff8ac28751a0a8 RCX: 0000000000000027
 RDX: ffff8ac9ef3a18c8 RSI: 0000000000000001 RDI: ffff8ac9ef3a18c0
 RBP: ffff8ac283fc6ea8 R08: 0000000000000000 R09: ffffa903b1a3f728
 R10: ffffffffad2a67f0 R11: 0000000000000003 R12: ffffffffad25e960
 R13: ffff8ac283fc6ec0 R14: ffff8ac283fc6eb0 R15: 0000000000000000
 FS:  0000000000000000(0000) GS:ffff8ac9ef380000(0000)
knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00002d641a8cd000 CR3: 00000006afa24000 CR4: 0000000000f52ef0
 PKRU: 55555554
 Call Trace:
  <TASK>
  ? __list_add_valid_or_report+0x83/0xa0
  ? __warn.cold+0x93/0xf6
  ? __list_add_valid_or_report+0x83/0xa0
  ? report_bug+0xff/0x140
  ? console_unlock+0x9d/0x140
  ? handle_bug+0x58/0x90
  ? exc_invalid_op+0x17/0x70
  ? asm_exc_invalid_op+0x1a/0x20
  ? __list_add_valid_or_report+0x83/0xa0
  ? __list_add_valid_or_report+0x83/0xa0
  plist_add+0xdd/0x140
  pm_qos_update_target+0xa0/0x1f0
  cpu_latency_qos_update_request+0x61/0xc0
  intel_dp_aux_xfer+0x4c7/0x6e0 [i915
130aa22568da4be1bf6a8f4b926f812e9a4460d0]
  intel_dp_aux_transfer+0x10e/0x3b0 [i915
130aa22568da4be1bf6a8f4b926f812e9a4460d0]
  drm_dp_i2c_do_msg+0x81/0x300 [drm_display_helper
f34443fa650f4fdc86a0e4b3a7e8f7fa67570a48]
  drm_dp_i2c_xfer+0xe4/0x2f0 [drm_display_helper
f34443fa650f4fdc86a0e4b3a7e8f7fa67570a48]
  __i2c_transfer+0x1d5/0x540
  i2c_transfer+0x5c/0xd0
  drm_do_probe_ddc_edid+0xc0/0x140
  ? __pfx_drm_do_probe_ddc_edid+0x10/0x10
  edid_block_read+0x38/0x100
  _drm_do_get_edid+0xb6/0x3a0 
  ? __pfx_drm_do_probe_ddc_edid+0x10/0x10
  drm_edid_read_custom+0x32/0xc0
  intel_dp_set_edid+0x3d4/0x3f0 [i915
130aa22568da4be1bf6a8f4b926f812e9a4460d0]
  intel_dp_detect+0x502/0x7b0 [i915
130aa22568da4be1bf6a8f4b926f812e9a4460d0]
  drm_helper_probe_detect_ctx+0x52/0x110
  output_poll_execute+0x13d/0x2d0
  process_one_work+0x174/0x330
  worker_thread+0x252/0x390
  ? __pfx_worker_thread+0x10/0x10
  kthread+0xcf/0x100
  ? __pfx_kthread+0x10/0x10
  ret_from_fork+0x31/0x50
  ? __pfx_kthread+0x10/0x10
  ret_from_fork_asm+0x1a/0x30
  </TASK>
 ---[ end trace 0000000000000000 ]---
 ------------[ cut here ]------------





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