Commit 2be65641 authored by Matti Hamalainen's avatar Matti Hamalainen Committed by Daniel Vetter

drm/nouveau: fix relocations applying logic and a double-free

Commit 03e0d26f ("drm/nouveau: slowpath for pushbuf ioctl") included
a logic-bug which results in the relocations not actually getting
applied at all as the call to nouveau_gem_pushbuf_reloc_apply() is
never reached. This causes a regression with graphical corruption,
triggered when relocations need to be done (for example after a
suspend/resume cycle.)

Fix by setting *apply_relocs value only if there were more than 0
relocations.

Additionally, the never reached code had a leftover u_free() call,
which, after fixing the logic, now got called and resulted in a
double-free. Fix by removing one u_free(), moving the other
and adding check for errors.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: nouveau@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: default avatarMatti Hamalainen <ccr@tnsp.org>
Fixes: 03e0d26f ("drm/nouveau: slowpath for pushbuf ioctl")
References: https://gitlab.freedesktop.org/drm/nouveau/-/issues/11Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201120152338.1203257-1-ccr@tnsp.org
parent 10e26e74
...@@ -558,8 +558,10 @@ nouveau_gem_pushbuf_validate(struct nouveau_channel *chan, ...@@ -558,8 +558,10 @@ nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
NV_PRINTK(err, cli, "validating bo list\n"); NV_PRINTK(err, cli, "validating bo list\n");
validate_fini(op, chan, NULL, NULL); validate_fini(op, chan, NULL, NULL);
return ret; return ret;
} else if (ret > 0) {
*apply_relocs = true;
} }
*apply_relocs = ret;
return 0; return 0;
} }
...@@ -662,7 +664,6 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli, ...@@ -662,7 +664,6 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data); nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
} }
u_free(reloc);
return ret; return ret;
} }
...@@ -872,9 +873,10 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data, ...@@ -872,9 +873,10 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
break; break;
} }
} }
u_free(reloc);
} }
out_prevalid: out_prevalid:
if (!IS_ERR(reloc))
u_free(reloc);
u_free(bo); u_free(bo);
u_free(push); u_free(push);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment