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author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-07-27 09:41:27 +0200 |
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committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-07-27 09:41:27 +0200 |
commit | 9c7f5cf088789957dcfb460cca1ab0fb578f2376 (patch) | |
tree | 6f5f305e5021fe5babb17feaf67be99d0f33e2ba /drivers/gpu/drm/drm_ioctl.c | |
parent | 592c718e422de34b4c56ee66d2f02d3726b244ab (diff) | |
parent | 5727dcfd8486399c40e39d2c08fe36fedab29d99 (diff) |
Merge remote-tracking branch 'drm-misc/drm-misc-next' into drm-tip
# Conflicts:
# drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
-rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 8faad23dc1d8..ca2a6e6101dc 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -472,7 +472,13 @@ EXPORT_SYMBOL(drm_invalid_op); */ static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) { - int len; + size_t len; + + /* don't attempt to copy a NULL pointer */ + if (WARN_ONCE(!value, "BUG: the value to copy was not set!")) { + *buf_len = 0; + return 0; + } /* don't overflow userbuf */ len = strlen(value); |