[PATCH 5.4 082/102] drm/lease: fix WARNING in idr_destroy
From: Greg Kroah-Hartman
Date: Tue Mar 24 2020 - 09:20:24 EST
From: Qiujun Huang <hqjagain@xxxxxxxxx>
commit b216a8e7908cd750550c0480cf7d2b3a37f06954 upstream.
drm_lease_create takes ownership of leases. And leases will be released
by drm_master_put.
drm_master_put
->drm_master_destroy
->idr_destroy
So we needn't call idr_destroy again.
Reported-and-tested-by: syzbot+05835159fe322770fe3d@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Qiujun Huang <hqjagain@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/1584518030-4173-1-git-send-email-hqjagain@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_lease.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_lease.c
+++ b/drivers/gpu/drm/drm_lease.c
@@ -542,10 +542,12 @@ int drm_mode_create_lease_ioctl(struct d
}
DRM_DEBUG_LEASE("Creating lease\n");
+ /* lessee will take the ownership of leases */
lessee = drm_lease_create(lessor, &leases);
if (IS_ERR(lessee)) {
ret = PTR_ERR(lessee);
+ idr_destroy(&leases);
goto out_leases;
}
@@ -580,7 +582,6 @@ out_lessee:
out_leases:
put_unused_fd(fd);
- idr_destroy(&leases);
DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl failed: %d\n", ret);
return ret;