lkml.org 
[lkml]   [2021]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.15 19/42] drm/msm: Fix null ptr access msm_ioctl_gem_submit()
Date
From: Akhil P Oommen <akhilpo@codeaurora.org>

[ Upstream commit 26d776fd0f79f093a5d0ce1a4c7c7a992bc3264c ]

Fix the below null pointer dereference in msm_ioctl_gem_submit():

26545.260705: Call trace:
26545.263223: kref_put+0x1c/0x60
26545.266452: msm_ioctl_gem_submit+0x254/0x744
26545.270937: drm_ioctl_kernel+0xa8/0x124
26545.274976: drm_ioctl+0x21c/0x33c
26545.278478: drm_compat_ioctl+0xdc/0xf0
26545.282428: __arm64_compat_sys_ioctl+0xc8/0x100
26545.287169: el0_svc_common+0xf8/0x250
26545.291025: do_el0_svc_compat+0x28/0x54
26545.295066: el0_svc_compat+0x10/0x1c
26545.298838: el0_sync_compat_handler+0xa8/0xcc
26545.303403: el0_sync_compat+0x188/0x1c0
26545.307445: Code: d503201f d503201f 52800028 4b0803e8 (b8680008)
26545.318799: Kernel panic - not syncing: Oops: Fatal exception

Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>
Link: https://lore.kernel.org/r/20211118154903.2.I3ae019673a0cc45d83a193a7858748dd03dbb820@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/msm_gem_submit.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index a38f23be497d8..d9aef97eb93ad 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -780,6 +780,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
args->nr_cmds);
if (IS_ERR(submit)) {
ret = PTR_ERR(submit);
+ submit = NULL;
goto out_unlock;
}

--
2.33.0


\
 
 \ /
  Last update: 2021-12-15 18:25    [W:0.360 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site