diff mbox series

media: verisilicon: Additional fix for the crash when opening the driver

Message ID 20230523162515.993862-1-benjamin.gaignard@collabora.com
State Accepted
Commit 14b4bd01f8e5d663a41ef8cec5857db874b66e88
Headers show
Series media: verisilicon: Additional fix for the crash when opening the driver | expand

Commit Message

Benjamin Gaignard May 23, 2023, 4:25 p.m. UTC
This fixes the following issue observed on Odroid-M1 board:

 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
 Mem abort info:
 ...
 Modules linked in: crct10dif_ce hantro_vpu snd_soc_simple_card snd_soc_simple_card_utils v4l2_vp9 v4l2_h264 rockchip_saradc v4l2_mem2mem videobuf2_dma_contig videobuf2_memops rtc_rk808 videobuf2_v4l2 industrialio_triggered_buffer rockchip_thermal dwmac_rk stmmac_platform stmmac videodev kfifo_buf display_connector videobuf2_common pcs_xpcs mc rockchipdrm analogix_dp dw_mipi_dsi dw_hdmi drm_display_helper panfrost drm_shmem_helper gpu_sched ip_tables x_tables ipv6
 CPU: 3 PID: 176 Comm: v4l_id Not tainted 6.3.0-rc7-next-20230420 #13481
 Hardware name: Hardkernel ODROID-M1 (DT)
 pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
 pc : hantro_try_fmt+0xa0/0x278 [hantro_vpu]
 lr : hantro_try_fmt+0x94/0x278 [hantro_vpu]
 ...
 Call trace:
  hantro_try_fmt+0xa0/0x278 [hantro_vpu]
  hantro_set_fmt_out+0x3c/0x298 [hantro_vpu]
  hantro_reset_raw_fmt+0x98/0x128 [hantro_vpu]
  hantro_set_fmt_cap+0x240/0x254 [hantro_vpu]
  hantro_reset_encoded_fmt+0x94/0xcc [hantro_vpu]
  hantro_reset_fmts+0x18/0x38 [hantro_vpu]
  hantro_open+0xd4/0x20c [hantro_vpu]
  v4l2_open+0x80/0x120 [videodev]
  chrdev_open+0xc0/0x22c
  do_dentry_open+0x13c/0x48c
  vfs_open+0x2c/0x38
  path_openat+0x550/0x934
  do_filp_open+0x80/0x12c
  do_sys_openat2+0xb4/0x168
  __arm64_sys_openat+0x64/0xac
  invoke_syscall+0x48/0x114
  el0_svc_common+0x100/0x120
  do_el0_svc+0x3c/0xa8
  el0_svc+0x40/0xa8
  el0t_64_sync_handler+0xb8/0xbc
  el0t_64_sync+0x190/0x194
 Code: 97fc8a7f f940aa80 52864a61 72a686c1 (b9400800)
 ---[ end trace 0000000000000000 ]---

Fixes: db6f68b51e5c ("media: verisilicon: Do not set context src/dst formats in reset functions")

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 drivers/media/platform/verisilicon/hantro_v4l2.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Hans Verkuil May 24, 2023, 9:15 a.m. UTC | #1
On 24/05/2023 11:06, Thorsten Leemhuis wrote:
> On 23.05.23 18:36, Benjamin Gaignard wrote:
>>
>> Le 23/05/2023 à 18:25, Benjamin Gaignard a écrit :
>>> This fixes the following issue observed on Odroid-M1 board:
>> [...]
>> Diederick, Marek, Michael,
>> I have tested this patch on my boards and I see no regressions on
>> decoder part and no more crash when probing the encoder.
>> Could you test it on your side to confirm it is ok ?
> 
> They all did, so that is done. Thx for your help, everybody!
> 
> /me now hopes this patch will be quickly reviewed, accepted and sent to
> Linus to prevent even more people running into this...

I plan to make a PR with 6.4 fixes today or tomorrow.

Regards,

	Hans

> 
>> Thorsten, I try/test regzbot commands, please tell me if it is correct.
>>
>> #regzbot ^introduced db6f68b51e5c
>> #regzbot title media: verisilicon: null pointer dereference in try_fmt
>> #regzbot ignore-activity
> 
> Thx for this, we just now track this regression two times. No worries,
> let me fix this and also tell regzbot about the fix:
> 
> #regzbot dup-of: https://lore.kernel.org/lkml/4995215.LvFx2qVVIh@bagend/
> #regzbot fix: media: verisilicon: Additional fix for the crash when
> opening the driver
> 
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
diff mbox series

Patch

diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
index 835518534e3b..61cfaaf4e927 100644
--- a/drivers/media/platform/verisilicon/hantro_v4l2.c
+++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
@@ -397,10 +397,12 @@  hantro_reset_raw_fmt(struct hantro_ctx *ctx, int bit_depth)
 	if (!raw_vpu_fmt)
 		return -EINVAL;
 
-	if (ctx->is_encoder)
+	if (ctx->is_encoder) {
 		encoded_fmt = &ctx->dst_fmt;
-	else
+		ctx->vpu_src_fmt = raw_vpu_fmt;
+	} else {
 		encoded_fmt = &ctx->src_fmt;
+	}
 
 	hantro_reset_fmt(&raw_fmt, raw_vpu_fmt);
 	raw_fmt.width = encoded_fmt->width;