Re: [PATCH v7 00/16] Intel IPU3 ImgU patchset

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On Fri, Dec 21, 2018 at 7:24 AM Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Hellon
>
> On Sunday, 16 December 2018 09:26:18 EET Laurent Pinchart wrote:
> > Hello Yong,
> >
> > Could you please have a look at the crash reported below ?
>
> A bit more information to help you debugging this. I've enabled KASAN in the
> kernel configuration, and get the following use-after-free reports.
>
> [  166.332920] ==================================================================
> [  166.332937] BUG: KASAN: use-after-free in __cached_rbnode_delete_update+0x36/0x202
> [  166.332944] Read of size 8 at addr ffff888133823718 by task yavta/1305
>
> [  166.332955] CPU: 3 PID: 1305 Comm: yavta Tainted: G         C        4.20.0-rc6+ #3
> [  166.332958] Hardware name: HP Soraka/Soraka, BIOS  08/30/2018
> [  166.332959] Call Trace:
> [  166.332967]  dump_stack+0x5b/0x81
> [  166.332974]  print_address_description+0x65/0x227
> [  166.332979]  ? __cached_rbnode_delete_update+0x36/0x202
> [  166.332983]  kasan_report+0x247/0x285
> [  166.332989]  __cached_rbnode_delete_update+0x36/0x202
> [  166.332995]  private_free_iova+0x57/0x6d
> [  166.332999]  __free_iova+0x23/0x31
> [  166.333011]  ipu3_dmamap_free+0x118/0x1d6 [ipu3_imgu]

Thanks Laurent, I think this is a very good hint. It looks like we're
basically freeing and already freed IOVA and corrupting some allocator
state?

> [  166.333022]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.333032]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.333043]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.333056]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.333067]  ? ipu3_all_nodes_streaming+0x1ee/0x20d [ipu3_imgu]
> [  166.333079]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.333088]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.333096]  ? __mutex_lock_interruptible_slowpath+0xf/0xf
> [  166.333104]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.333123]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.333142]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.333147]  ? slab_free_freelist_hook+0x46/0x94
> [  166.333151]  ? kfree+0x107/0x1a0
> [  166.333169]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.333187]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.333203]  ? v4l_enumstd+0x49/0x49 [videodev]
> [  166.333207]  ? __wake_up_common+0x342/0x342
> [  166.333215]  ? atomic_long_add_return+0x15/0x24
> [  166.333219]  ? ldsem_up_read+0x15/0x29
> [  166.333223]  ? tty_write+0x4c6/0x4d8
> [  166.333227]  ? n_tty_receive_char_special+0x1152/0x1152
> [  166.333244]  ? video_usercopy+0x8ae/0x8ae [videodev]
> [  166.333260]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.333266]  vfs_ioctl+0x76/0x89
> [  166.333271]  do_vfs_ioctl+0xb33/0xb7e
> [  166.333275]  ? __switch_to_asm+0x40/0x70
> [  166.333279]  ? __switch_to_asm+0x40/0x70
> [  166.333282]  ? __switch_to_asm+0x34/0x70
> [  166.333286]  ? __switch_to_asm+0x40/0x70
> [  166.333290]  ? ioctl_preallocate+0x174/0x174
> [  166.333294]  ? __switch_to+0x71c/0xb00
> [  166.333299]  ? compat_start_thread+0x6b/0x6b
> [  166.333302]  ? __switch_to_asm+0x34/0x70
> [  166.333305]  ? __switch_to_asm+0x40/0x70
> [  166.333309]  ? mmdrop+0x12/0x23
> [  166.333313]  ? finish_task_switch+0x34d/0x3de
> [  166.333319]  ? __schedule+0x1004/0x1045
> [  166.333325]  ? firmware_map_remove+0x119/0x119
> [  166.333330]  ksys_ioctl+0x50/0x70
> [  166.333335]  __x64_sys_ioctl+0x82/0x89
> [  166.333340]  do_syscall_64+0xa0/0xd2
> [  166.333345]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [  166.333349] RIP: 0033:0x7f2481541f47
> [  166.333354] Code: 00 00 00 48 8b 05 51 6f 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 6f 2c 00 f7 d8 64 89 01 48
> [  166.333357] RSP: 002b:00007fffd6aff9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> [  166.333362] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2481541f47
> [  166.333364] RDX: 00007fffd6aff9c4 RSI: 0000000040045613 RDI: 0000000000000003
> [  166.333367] RBP: 0000555f1c494af8 R08: 00007f247f34c000 R09: 00007f2481c24700
> [  166.333369] R10: 0000000000000020 R11: 0000000000000246 R12: 0000555f1c494b06
> [  166.333372] R13: 0000000000000004 R14: 00007fffd6affb90 R15: 00007fffd6b00825
>
> [  166.333383] Allocated by task 1305:
> [  166.333389]  kasan_kmalloc+0x8a/0x98
> [  166.333392]  slab_post_alloc_hook+0x31/0x51
> [  166.333396]  kmem_cache_alloc+0xd7/0x174
> [  166.333399]  alloc_iova+0x24/0x2ea
> [  166.333407]  ipu3_dmamap_alloc+0x193/0x83f [ipu3_imgu]
> [  166.333415]  ipu3_css_pool_init+0x80/0xdf [ipu3_imgu]
> [  166.333424]  ipu3_css_start_streaming+0x58df/0x5ddc [ipu3_imgu]
> [  166.333433]  imgu_s_stream+0x2dd/0x6c0 [ipu3_imgu]
> [  166.333442]  ipu3_vb2_start_streaming+0x35f/0x3de [ipu3_imgu]
> [  166.333449]  vb2_start_streaming+0x164/0x33b [videobuf2_common]
> [  166.333455]  vb2_core_streamon+0x1a1/0x208 [videobuf2_common]
> [  166.333471]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.333487]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.333501]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.333505]  vfs_ioctl+0x76/0x89
> [  166.333508]  do_vfs_ioctl+0xb33/0xb7e
> [  166.333511]  ksys_ioctl+0x50/0x70
> [  166.333514]  __x64_sys_ioctl+0x82/0x89
> [  166.333518]  do_syscall_64+0xa0/0xd2
> [  166.333521]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.333526] Freed by task 1301:
> [  166.333532]  __kasan_slab_free+0xfa/0x11c
> [  166.333535]  slab_free_freelist_hook+0x46/0x94
> [  166.333538]  kmem_cache_free+0x7b/0x172
> [  166.333542]  __free_iova+0x23/0x31
> [  166.333550]  ipu3_dmamap_free+0x118/0x1d6 [ipu3_imgu]
> [  166.333557]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.333566]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.333574]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.333584]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.333593]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.333599]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.333606]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.333621]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.333637]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.333652]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.333655]  vfs_ioctl+0x76/0x89
> [  166.333658]  do_vfs_ioctl+0xb33/0xb7e
> [  166.333662]  ksys_ioctl+0x50/0x70
> [  166.333665]  __x64_sys_ioctl+0x82/0x89
> [  166.333668]  do_syscall_64+0xa0/0xd2
> [  166.333671]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.333678] The buggy address belongs to the object at ffff888133823700
>                 which belongs to the cache iommu_iova of size 40
> [  166.333685] The buggy address is located 24 bytes inside of
>                 40-byte region [ffff888133823700, ffff888133823728)
> [  166.333690] The buggy address belongs to the page:
> [  166.333696] page:ffffea0004ce0880 count:1 mapcount:0 mapping:ffff8881519e8640 index:0x0 compound_mapcount: 0
> [  166.333703] flags: 0x200000000010200(slab|head)
> [  166.333710] raw: 0200000000010200 ffffea0004dfc488 ffff88814bfbde70 ffff8881519e8640
> [  166.333717] raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
> [  166.333720] page dumped because: kasan: bad access detected
>
> [  166.333726] Memory state around the buggy address:
> [  166.333732]  ffff888133823600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.333737]  ffff888133823680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.333742] >ffff888133823700: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
> [  166.333745]                             ^
> [  166.333750]  ffff888133823780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.333755]  ffff888133823800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.333759] ==================================================================
> [  166.333762] Disabling lock debugging due to kernel taint
> [  166.333764] ==================================================================
> [  166.333770] BUG: KASAN: double-free or invalid-free in kmem_cache_free+0x7b/0x172
>
> [  166.333780] CPU: 3 PID: 1305 Comm: yavta Tainted: G    B    C        4.20.0-rc6+ #3
> [  166.333782] Hardware name: HP Soraka/Soraka, BIOS  08/30/2018
> [  166.333783] Call Trace:
> [  166.333789]  dump_stack+0x5b/0x81
> [  166.333795]  print_address_description+0x65/0x227
> [  166.333799]  ? kmem_cache_free+0x7b/0x172
> [  166.333803]  kasan_report_invalid_free+0x67/0xa0
> [  166.333807]  ? kmem_cache_free+0x7b/0x172
> [  166.333812]  __kasan_slab_free+0x86/0x11c
> [  166.333817]  slab_free_freelist_hook+0x46/0x94
> [  166.333822]  kmem_cache_free+0x7b/0x172
> [  166.333826]  ? __free_iova+0x23/0x31
> [  166.333831]  __free_iova+0x23/0x31
> [  166.333840]  ipu3_dmamap_free+0x118/0x1d6 [ipu3_imgu]
> [  166.333851]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.333861]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.333872]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.333885]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.333896]  ? ipu3_all_nodes_streaming+0x1ee/0x20d [ipu3_imgu]
> [  166.333908]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.333917]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.333923]  ? __mutex_lock_interruptible_slowpath+0xf/0xf
> [  166.333932]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.333950]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.333970]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.333974]  ? slab_free_freelist_hook+0x46/0x94
> [  166.333979]  ? kfree+0x107/0x1a0
> [  166.333997]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.334015]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.334031]  ? v4l_enumstd+0x49/0x49 [videodev]
> [  166.334035]  ? __wake_up_common+0x342/0x342
> [  166.334042]  ? atomic_long_add_return+0x15/0x24
> [  166.334046]  ? ldsem_up_read+0x15/0x29
> [  166.334050]  ? tty_write+0x4c6/0x4d8
> [  166.334054]  ? n_tty_receive_char_special+0x1152/0x1152
> [  166.334071]  ? video_usercopy+0x8ae/0x8ae [videodev]
> [  166.334087]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.334092]  vfs_ioctl+0x76/0x89
> [  166.334097]  do_vfs_ioctl+0xb33/0xb7e
> [  166.334101]  ? __switch_to_asm+0x40/0x70
> [  166.334105]  ? __switch_to_asm+0x40/0x70
> [  166.334108]  ? __switch_to_asm+0x34/0x70
> [  166.334111]  ? __switch_to_asm+0x40/0x70
> [  166.334116]  ? ioctl_preallocate+0x174/0x174
> [  166.334120]  ? __switch_to+0x71c/0xb00
> [  166.334124]  ? compat_start_thread+0x6b/0x6b
> [  166.334127]  ? __switch_to_asm+0x34/0x70
> [  166.334130]  ? __switch_to_asm+0x40/0x70
> [  166.334134]  ? mmdrop+0x12/0x23
> [  166.334137]  ? finish_task_switch+0x34d/0x3de
> [  166.334143]  ? __schedule+0x1004/0x1045
> [  166.334148]  ? firmware_map_remove+0x119/0x119
> [  166.334153]  ksys_ioctl+0x50/0x70
> [  166.334158]  __x64_sys_ioctl+0x82/0x89
> [  166.334163]  do_syscall_64+0xa0/0xd2
> [  166.334167]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [  166.334171] RIP: 0033:0x7f2481541f47
> [  166.334175] Code: 00 00 00 48 8b 05 51 6f 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 6f 2c 00 f7 d8 64 89 01 48
> [  166.334177] RSP: 002b:00007fffd6aff9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> [  166.334181] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2481541f47
> [  166.334184] RDX: 00007fffd6aff9c4 RSI: 0000000040045613 RDI: 0000000000000003
> [  166.334186] RBP: 0000555f1c494af8 R08: 00007f247f34c000 R09: 00007f2481c24700
> [  166.334189] R10: 0000000000000020 R11: 0000000000000246 R12: 0000555f1c494b06
> [  166.334191] R13: 0000000000000004 R14: 00007fffd6affb90 R15: 00007fffd6b00825
>
> [  166.334201] Allocated by task 1305:
> [  166.334207]  kasan_kmalloc+0x8a/0x98
> [  166.334210]  slab_post_alloc_hook+0x31/0x51
> [  166.334213]  kmem_cache_alloc+0xd7/0x174
> [  166.334216]  alloc_iova+0x24/0x2ea
> [  166.334225]  ipu3_dmamap_alloc+0x193/0x83f [ipu3_imgu]
> [  166.334233]  ipu3_css_pool_init+0x80/0xdf [ipu3_imgu]
> [  166.334241]  ipu3_css_start_streaming+0x58df/0x5ddc [ipu3_imgu]
> [  166.334250]  imgu_s_stream+0x2dd/0x6c0 [ipu3_imgu]
> [  166.334259]  ipu3_vb2_start_streaming+0x35f/0x3de [ipu3_imgu]
> [  166.334266]  vb2_start_streaming+0x164/0x33b [videobuf2_common]
> [  166.334273]  vb2_core_streamon+0x1a1/0x208 [videobuf2_common]
> [  166.334288]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.334304]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.334319]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.334322]  vfs_ioctl+0x76/0x89
> [  166.334325]  do_vfs_ioctl+0xb33/0xb7e
> [  166.334328]  ksys_ioctl+0x50/0x70
> [  166.334332]  __x64_sys_ioctl+0x82/0x89
> [  166.334335]  do_syscall_64+0xa0/0xd2
> [  166.334338]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.334343] Freed by task 1301:
> [  166.334349]  __kasan_slab_free+0xfa/0x11c
> [  166.334352]  slab_free_freelist_hook+0x46/0x94
> [  166.334355]  kmem_cache_free+0x7b/0x172
> [  166.334359]  __free_iova+0x23/0x31
> [  166.334367]  ipu3_dmamap_free+0x118/0x1d6 [ipu3_imgu]
> [  166.334375]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.334383]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.334392]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.334401]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.334410]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.334416]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.334423]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.334438]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.334454]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.334469]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.334472]  vfs_ioctl+0x76/0x89
> [  166.334475]  do_vfs_ioctl+0xb33/0xb7e
> [  166.334479]  ksys_ioctl+0x50/0x70
> [  166.334482]  __x64_sys_ioctl+0x82/0x89
> [  166.334485]  do_syscall_64+0xa0/0xd2
> [  166.334488]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.334494] The buggy address belongs to the object at ffff888133823700
>                 which belongs to the cache iommu_iova of size 40
> [  166.334501] The buggy address is located 0 bytes inside of
>                 40-byte region [ffff888133823700, ffff888133823728)
> [  166.334506] The buggy address belongs to the page:
> [  166.334511] page:ffffea0004ce0880 count:1 mapcount:0 mapping:ffff8881519e8640 index:0x0 compound_mapcount: 0
> [  166.334517] flags: 0x200000000010200(slab|head)
> [  166.334524] raw: 0200000000010200 ffffea0004dfc488 ffff88814bfbde70 ffff8881519e8640
> [  166.334530] raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
> [  166.334533] page dumped because: kasan: bad access detected
>
> [  166.334539] Memory state around the buggy address:
> [  166.334544]  ffff888133823600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.334549]  ffff888133823680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.334554] >ffff888133823700: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
> [  166.334558]                    ^
> [  166.334562]  ffff888133823780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.334567]  ffff888133823800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.334571] ==================================================================
> [  166.340377] ==================================================================
> [  166.340388] BUG: KASAN: double-free or invalid-free in kfree+0x107/0x1a0
>
> [  166.340399] CPU: 3 PID: 1305 Comm: yavta Tainted: G    B    C        4.20.0-rc6+ #3
> [  166.340401] Hardware name: HP Soraka/Soraka, BIOS  08/30/2018
> [  166.340403] Call Trace:
> [  166.340410]  dump_stack+0x5b/0x81
> [  166.340416]  print_address_description+0x65/0x227
> [  166.340420]  ? kfree+0x107/0x1a0
> [  166.340425]  kasan_report_invalid_free+0x67/0xa0
> [  166.340428]  ? kfree+0x107/0x1a0
> [  166.340433]  __kasan_slab_free+0x86/0x11c
> [  166.340438]  slab_free_freelist_hook+0x46/0x94
> [  166.340443]  kfree+0x107/0x1a0
> [  166.340454]  ? ipu3_dmamap_free+0x17b/0x1d6 [ipu3_imgu]
> [  166.340464]  ipu3_dmamap_free+0x17b/0x1d6 [ipu3_imgu]
> [  166.340475]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.340485]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.340495]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.340509]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.340520]  ? ipu3_all_nodes_streaming+0x1ee/0x20d [ipu3_imgu]
> [  166.340531]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.340541]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.340548]  ? __mutex_lock_interruptible_slowpath+0xf/0xf
> [  166.340557]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.340575]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.340595]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.340600]  ? slab_free_freelist_hook+0x46/0x94
> [  166.340604]  ? kfree+0x107/0x1a0
> [  166.340622]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.340640]  ? copy_overflow+0x14/0x14 [videodev]
> [  166.340657]  ? v4l_enumstd+0x49/0x49 [videodev]
> [  166.340660]  ? __wake_up_common+0x342/0x342
> [  166.340668]  ? atomic_long_add_return+0x15/0x24
> [  166.340672]  ? ldsem_up_read+0x15/0x29
> [  166.340677]  ? tty_write+0x4c6/0x4d8
> [  166.340681]  ? n_tty_receive_char_special+0x1152/0x1152
> [  166.340698]  ? video_usercopy+0x8ae/0x8ae [videodev]
> [  166.340714]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.340720]  vfs_ioctl+0x76/0x89
> [  166.340725]  do_vfs_ioctl+0xb33/0xb7e
> [  166.340729]  ? __switch_to_asm+0x40/0x70
> [  166.340733]  ? __switch_to_asm+0x40/0x70
> [  166.340736]  ? __switch_to_asm+0x34/0x70
> [  166.340739]  ? __switch_to_asm+0x40/0x70
> [  166.340743]  ? ioctl_preallocate+0x174/0x174
> [  166.340748]  ? __switch_to+0x71c/0xb00
> [  166.340752]  ? compat_start_thread+0x6b/0x6b
> [  166.340756]  ? __switch_to_asm+0x34/0x70
> [  166.340759]  ? __switch_to_asm+0x40/0x70
> [  166.340762]  ? mmdrop+0x12/0x23
> [  166.340766]  ? finish_task_switch+0x34d/0x3de
> [  166.340772]  ? __schedule+0x1004/0x1045
> [  166.340777]  ? firmware_map_remove+0x119/0x119
> [  166.340782]  ksys_ioctl+0x50/0x70
> [  166.340788]  __x64_sys_ioctl+0x82/0x89
> [  166.340793]  do_syscall_64+0xa0/0xd2
> [  166.340797]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [  166.340802] RIP: 0033:0x7f2481541f47
> [  166.340806] Code: 00 00 00 48 8b 05 51 6f 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 6f 2c 00 f7 d8 64 89 01 48
> [  166.340809] RSP: 002b:00007fffd6aff9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> [  166.340813] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2481541f47
> [  166.340816] RDX: 00007fffd6aff9c4 RSI: 0000000040045613 RDI: 0000000000000003
> [  166.340819] RBP: 0000555f1c494af8 R08: 00007f247f34c000 R09: 00007f2481c24700
> [  166.340821] R10: 0000000000000020 R11: 0000000000000246 R12: 0000555f1c494b06
> [  166.340824] R13: 0000000000000004 R14: 00007fffd6affb90 R15: 00007fffd6b00825
>
> [  166.340834] Allocated by task 1305:
> [  166.340840]  kasan_kmalloc+0x8a/0x98
> [  166.340844]  __kmalloc_node+0x193/0x1ba
> [  166.340848]  kvmalloc_node+0x44/0x6d
> [  166.340856]  ipu3_dmamap_alloc+0x1c9/0x83f [ipu3_imgu]
> [  166.340864]  ipu3_css_pool_init+0x80/0xdf [ipu3_imgu]
> [  166.340873]  ipu3_css_start_streaming+0x58df/0x5ddc [ipu3_imgu]
> [  166.340882]  imgu_s_stream+0x2dd/0x6c0 [ipu3_imgu]
> [  166.340891]  ipu3_vb2_start_streaming+0x35f/0x3de [ipu3_imgu]
> [  166.340897]  vb2_start_streaming+0x164/0x33b [videobuf2_common]
> [  166.340904]  vb2_core_streamon+0x1a1/0x208 [videobuf2_common]
> [  166.340920]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.340935]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.340950]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.340954]  vfs_ioctl+0x76/0x89
> [  166.340957]  do_vfs_ioctl+0xb33/0xb7e
> [  166.340960]  ksys_ioctl+0x50/0x70
> [  166.340963]  __x64_sys_ioctl+0x82/0x89
> [  166.340966]  do_syscall_64+0xa0/0xd2
> [  166.340969]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.340974] Freed by task 1301:
> [  166.340980]  __kasan_slab_free+0xfa/0x11c
> [  166.340983]  slab_free_freelist_hook+0x46/0x94
> [  166.340986]  kfree+0x107/0x1a0
> [  166.340994]  ipu3_dmamap_free+0x17b/0x1d6 [ipu3_imgu]
> [  166.341002]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> [  166.341010]  ipu3_css_pipeline_cleanup+0x79/0xcf [ipu3_imgu]
> [  166.341019]  ipu3_css_stop_streaming+0x2fe/0x4dc [ipu3_imgu]
> [  166.341028]  imgu_s_stream+0xc0/0x6c0 [ipu3_imgu]
> [  166.341037]  ipu3_vb2_stop_streaming+0x27c/0x2d2 [ipu3_imgu]
> [  166.341043]  __vb2_queue_cancel+0xa8/0x705 [videobuf2_common]
> [  166.341050]  vb2_core_streamoff+0x68/0xf8 [videobuf2_common]
> [  166.341066]  __video_do_ioctl+0x625/0x887 [videodev]
> [  166.341081]  video_usercopy+0x3a3/0x8ae [videodev]
> [  166.341096]  v4l2_ioctl+0xb7/0xc5 [videodev]
> [  166.341100]  vfs_ioctl+0x76/0x89
> [  166.341103]  do_vfs_ioctl+0xb33/0xb7e
> [  166.341106]  ksys_ioctl+0x50/0x70
> [  166.341109]  __x64_sys_ioctl+0x82/0x89
> [  166.341112]  do_syscall_64+0xa0/0xd2
> [  166.341116]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [  166.341122] The buggy address belongs to the object at ffff88811d228440
>                 which belongs to the cache kmalloc-8 of size 8
> [  166.341129] The buggy address is located 0 bytes inside of
>                 8-byte region [ffff88811d228440, ffff88811d228448)
> [  166.341134] The buggy address belongs to the page:
> [  166.341140] page:ffffea0004748a00 count:1 mapcount:0 mapping:ffff88815a80c340 index:0xffff88811d228f80 compound_mapcount: 0
> [  166.341146] flags: 0x200000000010200(slab|head)
> [  166.341153] raw: 0200000000010200 ffffea000564b288 ffffea00049ef708 ffff88815a80c340
> [  166.341159] raw: ffff88811d228f80 0000000000160013 00000001ffffffff 0000000000000000
> [  166.341163] page dumped because: kasan: bad access detected
>
> [  166.341169] Memory state around the buggy address:
> [  166.341174]  ffff88811d228300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.341179]  ffff88811d228380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.341184] >ffff88811d228400: fc fc fc fc fc fc fc fc fb fc fc fc fc fc fc fc
> [  166.341188]                                            ^
> [  166.341192]  ffff88811d228480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.341197]  ffff88811d228500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> [  166.341201] ==================================================================
>
> > On Tuesday, 11 December 2018 16:20:43 EET Laurent Pinchart wrote:
> > > On Tuesday, 11 December 2018 15:43:53 EET Laurent Pinchart wrote:
> > > > On Tuesday, 11 December 2018 15:34:49 EET Laurent Pinchart wrote:
> > > >> On Wednesday, 5 December 2018 02:30:46 EET Mani, Rajmohan wrote:
> > > >>
> > > >> [snip]
> > > >>
> > > >>> I can see a couple of steps missing in the script below.
> > > >>> (https://lists.libcamera.org/pipermail/libcamera-devel/2018-November/0
> > > >>> 00040.html)
> > > >>>
> > > >>> From patch 02 of this v7 series "doc-rst: Add Intel IPU3
> > > >>> documentation",
> > > >>> under section "Configuring ImgU V4L2 subdev for image processing"...
> > > >>>
> > > >>> 1. The pipe mode needs to be configured for the V4L2 subdev.
> > > >>>
> > > >>> Also the pipe mode of the corresponding V4L2 subdev should be set as
> > > >>> desired (e.g 0 for video mode or 1 for still mode) through the control
> > > >>> id 0x009819a1 as below.
> > > >>>
> > > >>> e.g v4l2n -d /dev/v4l-subdev7 --ctrl=0x009819A1=1
> > > >>
> > > >> I assume the control takes a valid default value ? It's better to set
> > > >> it
> > > >> explicitly anyway, so I'll do so.
> > > >>
> > > >>> 2. ImgU pipeline needs to be configured for image processing as below.
> > > >>>
> > > >>> RAW bayer frames go through the following ISP pipeline HW blocks to
> > > >>> have the processed image output to the DDR memory.
> > > >>>
> > > >>> RAW bayer frame -> Input Feeder -> Bayer Down Scaling (BDS) ->
> > > >>> Geometric Distortion Correction (GDC) -> DDR
> > > >>>
> > > >>> The ImgU V4L2 subdev has to be configured with the supported
> > > >>> resolutions in all the above HW blocks, for a given input resolution.
> > > >>>
> > > >>> For a given supported resolution for an input frame, the Input Feeder,
> > > >>> Bayer Down Scaling and GDC blocks should be configured with the
> > > >>> supported resolutions. This information can be obtained by looking at
> > > >>> the following IPU3 ISP configuration table for ov5670 sensor.
> > > >>>
> > > >>> https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+
> > > >>> /master/baseboard-poppy/media-libs/cros-camera-hal-configs-poppy/files
> > > >>> /
> > > >>> gcss/graph_settings_ov5670.xml
> > > >>>
> > > >>> For the ov5670 example, for an input frame with a resolution of
> > > >>> 2592x1944 (which is input to the ImgU subdev pad 0), the corresponding
> > > >>> resolutions for input feeder, BDS and GDC are 2592x1944, 2592x1944 and
> > > >>> 2560x1920 respectively.
> > > >>
> > > >> How is the GDC output resolution computed from the input resolution ?
> > > >> Does the GDC always consume 32 columns and 22 lines ?
> > > >>
> > > >>> The following steps prepare the ImgU ISP pipeline for the image
> > > >>> processing.
> > > >>>
> > > >>> 1. The ImgU V4L2 subdev data format should be set by using the
> > > >>> VIDIOC_SUBDEV_S_FMT on pad 0, using the GDC width and height obtained
> > > >>> above.
> > > >>
> > > >> If I understand things correctly, the GDC resolution is the pipeline
> > > >> output resolution. Why is it configured on pad 0 ?
> > > >>
> > > >>> 2. The ImgU V4L2 subdev cropping should be set by using the
> > > >>> VIDIOC_SUBDEV_S_SELECTION on pad 0, with V4L2_SEL_TGT_CROP as the
> > > >>> target, using the input feeder height and width.
> > > >>>
> > > >>> 3. The ImgU V4L2 subdev composing should be set by using the
> > > >>> VIDIOC_SUBDEV_S_SELECTION on pad 0, with V4L2_SEL_TGT_COMPOSE as the
> > > >>> target, using the BDS height and width.
> > > >>>
> > > >>> Once these 2 steps are done, the raw bayer frames can be input to the
> > > >>> ImgU V4L2 subdev for processing.
> > > >>
> > > >> Do I need to capture from both the output and viewfinder nodes ? How
> > > >> are
> > > >> they related to the IF -> BDS -> GDC pipeline, are they both fed from
> > > >> the GDC output ? If so, how does the viewfinder scaler fit in that
> > > >> picture ?
> > > >>
> > > >> I have tried the above configuration with the IPU3 v8 driver, and while
> > > >> the kernel doesn't crash, no images get processed. The userspace
> > > >> processes wait forever for buffers to be ready. I then configured pad 2
> > > >> to 2560x1920 and pad 3 to 1920x1080, and managed to capture images \o/
> > > >>
> > > >> There's one problem though: during capture, or very soon after it, the
> > > >> machine locks up completely. I suspect a memory corruption, as when it
> > > >> doesn't log immediately commands such as dmesg will not produce any
> > > >> output and just block, until the system freezes soon after (especially
> > > >> when moving the mouse).
> > > >>
> > > >> I would still call this an improvement to some extent, but there's
> > > >> definitely room for more improvements :-)
> > > >>
> > > >> To reproduce the issue, you can run the ipu3-process.sh script
> > > >> (attached
> > > >> to this e-mail) with the following arguments:
> > > >>
> > > >> $ ipu3-process.sh --out 2560x1920 frame-2592x1944.cio2
> > >
> > > This should have read
> > >
> > > $ ipu3-process.sh --out 2560x1920 --vf 1920x1080 frame-2592x1944.cio2
> > >
> > > Without the --vf argument no images are processed.
> > >
> > > It seems that the Intel mail server blocked the mail that contained the
> > > script. You can find a copy at http://paste.debian.net/hidden/fd5bb8df/.
> > >
> > > >> frame-2592x1944.cio2 is a binary file containing a 2592x1944 images in
> > > >> the IPU3-specific Bayer format (for a total of 6469632 bytes).
> > > >
> > > > I managed to get the dmesg output, and it doesn't look pretty.
> > > >
> > > > [  571.217192] WARNING: CPU: 3 PID: 1303 at /home/laurent/src/iob/oss/
> > > > libcamera/linux/drivers/staging/media/ipu3/ipu3-dmamap.c:172
> > > > ipu3_dmamap_unmap+0x30/0x75 [ipu3_imgu]
> > > > [  571.217196] Modules linked in: asix usbnet mii zram arc4 iwlmvm
> > > > mac80211
> > > > iwlwifi intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp
> > > > cfg80211
> > > > 8250_dw hid_multitouch ipu3_cio2 ipu3_imgu(C) videobuf2_dma_sg
> > > > videobuf2_memops videobuf2_v4l2 videobuf2_common
> > > > processor_thermal_device
> > > > intel_soc_dts_iosf ov13858 dw9714 ov5670 v4l2_fwnode v4l2_common
> > > > videodev
> > > > at24 media int3403_thermal int340x_thermal_zone cros_ec_lpcs
> > > > cros_ec_core
> > > > int3400_thermal chromeos_pstore mac_hid acpi_thermal_rel autofs4 usbhid
> > > > mmc_block hid_generic i915 video i2c_algo_bit drm_kms_helper syscopyarea
> > > > sysfillrect sdhci_pci sysimgblt fb_sys_fops cqhci sdhci drm
> > > > drm_panel_orientation_quirks i2c_hid hid
> > > > [  571.217254] CPU: 3 PID: 1303 Comm: yavta Tainted: G         C
> > > > 4.20.0-rc6+ #2
> > > > [  571.217256] Hardware name: HP Soraka/Soraka, BIOS  08/30/2018
> > > > [  571.217267] RIP: 0010:ipu3_dmamap_unmap+0x30/0x75 [ipu3_imgu]
> > > > [  571.217271] Code: 54 55 48 8d af d0 6e 00 00 53 48 8b 76 10 49 89 fc
> > > > f3
> > > > 48 0f bc 8f f0 6e 00 00 48 89 ef 48 d3 ee e8 e6 73 d9 e6 48 85 c0 75 07
> > > > <0f> 0b 5b 5d 41 5c c3 48 8b 70 20 48 89 c3 48 8b 40 18 49 8b bc 24
> > > > [  571.217274] RSP: 0018:ffffb675021c7b38 EFLAGS: 00010246
> > > > [  571.217278] RAX: 0000000000000000 RBX: ffff8f5cf58f8448 RCX:
> > > > 000000000000000c
> > > > [  571.217280] RDX: 0000000000000000 RSI: 0000000000000202 RDI:
> > > > 00000000ffffffff
> > > > [  571.217283] RBP: ffff8f5cf58f6ef8 R08: 00000000000006c5 R09:
> > > > ffff8f5cfaba16f0
> > > > [  571.217286] R10: ffff8f5cbf508f98 R11: 000000e03da27aba R12:
> > > > ffff8f5cf58f0028
> > > > [  571.217289] R13: ffff8f5cf58f0028 R14: 0000000000000000 R15:
> > > > ffff8f5cf58f04e8
> > > > [  571.217293] FS:  00007f85d009c700(0000) GS:ffff8f5cfab80000(0000)
> > > > knlGS:
> > > > 0000000000000000
> > > > [  571.217296] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > > [  571.217299] CR2: 00007f3440fce4b0 CR3: 000000014abf2001 CR4:
> > > > 00000000003606e0
> > > > [  571.217301] Call Trace:
> > > > [  571.217316]  ipu3_dmamap_free+0x5b/0x8f [ipu3_imgu]
> > > > [  571.217326]  ipu3_css_pool_cleanup+0x25/0x2f [ipu3_imgu]
> > > > [  571.217338]  ipu3_css_pipeline_cleanup+0x59/0x8f [ipu3_imgu]
> > > > [  571.217348]  ipu3_css_stop_streaming+0x15b/0x20f [ipu3_imgu]
> > > > [  571.217360]  imgu_s_stream+0x5a/0x30a [ipu3_imgu]
> > > > [  571.217371]  ? ipu3_all_nodes_streaming+0x14f/0x16b [ipu3_imgu]
> > > > [  571.217382]  ipu3_vb2_stop_streaming+0xe4/0x10f [ipu3_imgu]
> > > > [  571.217392]  __vb2_queue_cancel+0x2b/0x1b8 [videobuf2_common]
> > > > [  571.217402]  vb2_core_streamoff+0x30/0x71 [videobuf2_common]
> > > > [  571.217418]  __video_do_ioctl+0x258/0x38e [videodev]
> > > > [  571.217438]  video_usercopy+0x25f/0x4e5 [videodev]
> > > > [  571.217453]  ? copy_overflow+0x14/0x14 [videodev]
> > > > [  571.217471]  v4l2_ioctl+0x4d/0x58 [videodev]
> > > > [  571.217480]  vfs_ioctl+0x1e/0x2b
> > > > [  571.217486]  do_vfs_ioctl+0x531/0x559
> > > > [  571.217494]  ? vfs_write+0xd1/0xdf
> > > > [  571.217500]  ksys_ioctl+0x50/0x70
> > > > [  571.217506]  __x64_sys_ioctl+0x16/0x19
> > > > [  571.217512]  do_syscall_64+0x53/0x60
> > > > [  571.217519]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > > > [  571.217524] RIP: 0033:0x7f85cf9b9f47
> > > > [  571.217528] Code: 00 00 00 48 8b 05 51 6f 2c 00 64 c7 00 26 00 00 00
> > > > 48
> > > > c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05
> > > > <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 6f 2c 00 f7 d8 64 89 01 48
> > > > [  571.217531] RSP: 002b:00007ffc59056b78 EFLAGS: 00000246 ORIG_RAX:
> > > > 0000000000000010
> > > > [  571.217535] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
> > > > 00007f85cf9b9f47
> > > > [  571.217537] RDX: 00007ffc59056b84 RSI: 0000000040045613 RDI:
> > > > 0000000000000003
> > > > [  571.217540] RBP: 000055f4c4dc0af8 R08: 00007f85cd7c4000 R09:
> > > > 00007f85d009c700
> > > > [  571.217542] R10: 0000000000000020 R11: 0000000000000246 R12:
> > > > 000055f4c4dc0b06
> > > > [  571.217545] R13: 0000000000000004 R14: 00007ffc59056d50 R15:
> > > > 00007ffc59057825
> > > > [  571.217553] ---[ end trace 4b42bd84953eff53 ]---
> > > > [  571.318645] ipu3-imgu 0000:00:05.0: wait cio gate idle timeout
> > >
> > > And after fixing another issue in the capture script (which was setting
> > > the
> > > format on the ImgU subdev pad 3 to 2560x1920 but capture in 1920x1080), I
> > > now get plenty of the following messages:
> > >
> > > [  221.366131] BUG: Bad page state in process yavta  pfn:14a4ff
> > > [  221.366134] page:ffffde5d45293fc0 count:-1 mapcount:0 mapping:
> > > 0000000000000000 index:0x0
> > > [  221.366137] flags: 0x200000000000000()
> > > [  221.366140] raw: 0200000000000000 dead000000000100 dead000000000200
> > > 0000000000000000
> > > [  221.366143] raw: 0000000000000000 0000000000000000 ffffffffffffffff
> > > 0000000000000000
> > > [  221.366145] page dumped because: nonzero _refcount
> > > [  221.366147] Modules linked in: asix usbnet mii zram arc4 iwlmvm
> > > intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp mac80211 iwlwifi
> > > cfg80211 hid_multitouch 8250_dw ipu3_cio2 ipu3_imgu(C) videobuf2_dma_sg
> > > videobuf2_memops videobuf2_v4l2 processor_thermal_device videobuf2_common
> > > intel_soc_dts_iosf ov13858 ov5670 dw9714 v4l2_fwnode v4l2_common videodev
> > > media at24 cros_ec_lpcs cros_ec_core int3403_thermal int340x_thermal_zone
> > > chromeos_pstore mac_hid int3400_thermal acpi_thermal_rel autofs4 usbhid
> > > mmc_block hid_generic i915 video i2c_algo_bit drm_kms_helper syscopyarea
> > > sysfillrect sysimgblt fb_sys_fops sdhci_pci cqhci sdhci drm
> > > drm_panel_orientation_quirks i2c_hid hid
> > > [  221.366172] CPU: 3 PID: 1022 Comm: yavta Tainted: G    B   WC
> > > 4.20.0-rc6+ #2
> > > [  221.366173] Hardware name: HP Soraka/Soraka, BIOS  08/30/2018
> > > [  221.366173] Call Trace:
> > > [  221.366176]  dump_stack+0x46/0x59
> > > [  221.366179]  bad_page+0xf2/0x10c
> > > [  221.366182]  free_pages_check+0x78/0x81
> > > [  221.366186]  free_pcppages_bulk+0xa6/0x236
> > > [  221.366190]  free_unref_page+0x4b/0x53
> > > [  221.366193]  vb2_dma_sg_put+0x95/0xb5 [videobuf2_dma_sg]
> > > [  221.366197]  __vb2_buf_mem_free+0x3a/0x6e [videobuf2_common]
> > > [  221.366202]  __vb2_queue_free+0xe3/0x1be [videobuf2_common]
> > > [  221.366207]  vb2_core_reqbufs+0xe9/0x2cc [videobuf2_common]
> > > [  221.366212]  vb2_ioctl_reqbufs+0x78/0x9e [videobuf2_v4l2]
> > > [  221.366220]  __video_do_ioctl+0x258/0x38e [videodev]
> > > [  221.366229]  video_usercopy+0x25f/0x4e5 [videodev]
> > > [  221.366237]  ? copy_overflow+0x14/0x14 [videodev]
> > > [  221.366240]  ? unmap_region+0xe0/0x10a
> > > [  221.366250]  v4l2_ioctl+0x4d/0x58 [videodev]
> > > [  221.366253]  vfs_ioctl+0x1e/0x2b
> > > [  221.366255]  do_vfs_ioctl+0x531/0x559
> > > [  221.366260]  ksys_ioctl+0x50/0x70
> > > [  221.366263]  __x64_sys_ioctl+0x16/0x19
> > > [  221.366266]  do_syscall_64+0x53/0x60
> > > [  221.366269]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > > [  221.366270] RIP: 0033:0x7fbe39f6af47
> > > [  221.366272] Code: 00 00 00 48 8b 05 51 6f 2c 00 64 c7 00 26 00 00 00 48
> > > c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05
> > > <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 6f 2c 00 f7 d8 64 89 01 48
> > > [  221.366273] RSP: 002b:00007fff05638e68 EFLAGS: 00000246 ORIG_RAX:
> > > 0000000000000010
> > > [  221.366275] RAX: ffffffffffffffda RBX: 0000000000000007 RCX:
> > > 00007fbe39f6af47
> > > [  221.366279] RDX: 00007fff05638f90 RSI: 00000000c0145608 RDI:
> > > 0000000000000003
> > > [  221.366283] RBP: 0000000000000004 R08: 0000000000000000 R09:
> > > 0000000000000045
> > > [  221.366287] R10: 0000000000000557 R11: 0000000000000246 R12:
> > > 000055c83bd76750
> > > [  221.366290] R13: 000055c83b6b26a0 R14: 0000000000000001 R15:
> > > 00007fff0563a825
>
> --
> Regards,
>
> Laurent Pinchart
>
>
>



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