Public bug reported:
I just noticed this in my dmesg whilst researching a different reported
error.
Two array out of bounds exceptions... dp.c line 304 and line 313.
My hardware... Dell M6700 laptop on E-Port2 docking station with ext DP monitor
iiyama 35" widescreen.
Fully updated at time of noticing logged problem.
Linux main 6.4.0-060400-generic #202306271339 SMP PREEMPT_DYNAMIC Tue
Jun 27 14:26:34 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
[ 5.530689]
================================================================================
[ 5.530691] UBSAN: array-index-out-of-bounds in
/home/kernel/COD/linux/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:304:26
[ 5.530692] index -22 is out of range for type '<unknown> [8]'
[ 5.530694] CPU: 2 PID: 681 Comm: kworker/2:3 Tainted: P OE
6.4.0-060400-generic #202306271339
[ 5.530697] Hardware name: Dell Inc. Precision M6700/0THJRV, BIOS A20
11/30/2018
[ 5.530698] Workqueue: events nouveau_display_hpd_work [nouveau]
[ 5.530836] Call Trace:
[ 5.530838] <TASK>
[ 5.530840] dump_stack_lvl+0x48/0x70
[ 5.530846] dump_stack+0x10/0x20
[ 5.530848] __ubsan_handle_out_of_bounds+0xc6/0x110
[ 5.530852] nvkm_dp_train_link+0x5b0/0x5c0 [nouveau]
[ 5.530961] ? __const_udelay+0x43/0x60
[ 5.530963] ? gm200_i2c_aux_init+0xcf/0x1d0 [nouveau]
[ 5.531069] nvkm_dp_train+0x86/0x510 [nouveau]
[ 5.531187] ? nvkm_i2c_aux_xfer+0x4a/0xa0 [nouveau]
[ 5.531296] nvkm_dp_acquire+0x188/0x420 [nouveau]
[ 5.531413] nvkm_uoutp_mthd+0x2c4/0x3c0 [nouveau]
[ 5.531530] nvkm_object_mthd+0x1a/0x40 [nouveau]
[ 5.531624] nvkm_ioctl_mthd+0x5d/0xc0 [nouveau]
[ 5.531718] nvkm_ioctl+0x135/0x2a0 [nouveau]
[ 5.531810] nvkm_client_ioctl+0xe/0x20 [nouveau]
[ 5.531922] nvif_object_mthd+0xe3/0x200 [nouveau]
[ 5.532014] nvif_outp_dp_retrain+0x1d/0xa0 [nouveau]
[ 5.532105] nouveau_dp_link_check+0x33/0x50 [nouveau]
[ 5.532215] nouveau_display_hpd_work+0x2c4/0x2f0 [nouveau]
[ 5.532330] process_one_work+0x225/0x430
[ 5.532333] worker_thread+0x50/0x3f0
[ 5.532335] ? __pfx_worker_thread+0x10/0x10
[ 5.532336] kthread+0xf2/0x120
[ 5.532339] ? __pfx_kthread+0x10/0x10
[ 5.532341] ret_from_fork+0x2c/0x50
[ 5.532344] </TASK>
[ 5.532377]
================================================================================
[ 5.532714]
================================================================================
[ 5.532715] UBSAN: array-index-out-of-bounds in
/home/kernel/COD/linux/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:313:19
[ 5.532716] index -22 is out of range for type '<unknown> [8]'
[ 5.532717] CPU: 2 PID: 681 Comm: kworker/2:3 Tainted: P OE
6.4.0-060400-generic #202306271339
[ 5.532718] Hardware name: Dell Inc. Precision M6700/0THJRV, BIOS A20
11/30/2018
[ 5.532719] Workqueue: events nouveau_display_hpd_work [nouveau]
[ 5.532826] Call Trace:
[ 5.532826] <TASK>
[ 5.532827] dump_stack_lvl+0x48/0x70
[ 5.532830] dump_stack+0x10/0x20
[ 5.532831] __ubsan_handle_out_of_bounds+0xc6/0x110
[ 5.532834] nvkm_dp_train_link+0x55a/0x5c0 [nouveau]
[ 5.532944] ? __const_udelay+0x43/0x60
[ 5.532946] ? gm200_i2c_aux_init+0xcf/0x1d0 [nouveau]
[ 5.533046] nvkm_dp_train+0x86/0x510 [nouveau]
[ 5.533156] ? nvkm_i2c_aux_xfer+0x4a/0xa0 [nouveau]
[ 5.533262] nvkm_dp_acquire+0x188/0x420 [nouveau]
[ 5.533383] nvkm_uoutp_mthd+0x2c4/0x3c0 [nouveau]
[ 5.533503] nvkm_object_mthd+0x1a/0x40 [nouveau]
[ 5.533599] nvkm_ioctl_mthd+0x5d/0xc0 [nouveau]
[ 5.533694] nvkm_ioctl+0x135/0x2a0 [nouveau]
[ 5.533789] nvkm_client_ioctl+0xe/0x20 [nouveau]
[ 5.533903] nvif_object_mthd+0xe3/0x200 [nouveau]
[ 5.533998] nvif_outp_dp_retrain+0x1d/0xa0 [nouveau]
[ 5.534091] nouveau_dp_link_check+0x33/0x50 [nouveau]
[ 5.534204] nouveau_display_hpd_work+0x2c4/0x2f0 [nouveau]
[ 5.534317] process_one_work+0x225/0x430
[ 5.534319] worker_thread+0x50/0x3f0
[ 5.534321] ? __pfx_worker_thread+0x10/0x10
[ 5.534322] kthread+0xf2/0x120
[ 5.534324] ? __pfx_kthread+0x10/0x10
[ 5.534326] ret_from_fork+0x2c/0x50
[ 5.534328] </TASK>
[ 5.534329]
================================================================================
[ 5.585912] nouveau 0000:01:00.0: DRM: [DRM/0000000a:sor-0006-0f42]
[DP_RETRAIN] (ret:-1)
...
...
[ 22.822585] nouveau 0000:01:00.0: disp: outp 0a:0006:0f42: training failed
[ 23.122005] nouveau 0000:01:00.0: DRM: [DRM/0000000a:sor-0006-0f42]
[DP_RETRAIN] (ret:-1)
...
...
[ 38.470716] nouveau 0000:01:00.0: disp: outp 0a:0006:0f42: training failed
[ 38.813961] nouveau 0000:01:00.0: DRM: [DRM/0000000a:sor-0006-0f42]
[DP_RETRAIN] (ret:-1)
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2099974
Title:
array-index-out-of-bounds in nouveau disp dp.c
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