diff options
| author | Matti Hamalainen <ccr@tnsp.org> | 2020-11-20 17:23:38 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2020-11-26 08:04:19 +0100 |
| commit | 2be65641642ef423f82162c3a5f28c754d1637d2 (patch) | |
| tree | 7ddf12d25ef9a2069596f4d79f077eaa23e4b7d2 /drivers | |
| parent | 10e26e749fd0ba78a913548e2efeca1a157772da (diff) | |
| download | linux-2be65641642ef423f82162c3a5f28c754d1637d2.tar.bz2 | |
drm/nouveau: fix relocations applying logic and a double-free
Commit 03e0d26fcf79 ("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: Matti Hamalainen <ccr@tnsp.org>
Fixes: 03e0d26fcf79 ("drm/nouveau: slowpath for pushbuf ioctl")
References: https://gitlab.freedesktop.org/drm/nouveau/-/issues/11
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201120152338.1203257-1-ccr@tnsp.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_gem.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 549bc67feabb..c2051380d18c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -558,8 +558,10 @@ nouveau_gem_pushbuf_validate(struct nouveau_channel *chan, NV_PRINTK(err, cli, "validating bo list\n"); validate_fini(op, chan, NULL, NULL); return ret; + } else if (ret > 0) { + *apply_relocs = true; } - *apply_relocs = ret; + return 0; } @@ -662,7 +664,6 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli, nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data); } - u_free(reloc); return ret; } @@ -872,9 +873,10 @@ out: break; } } - u_free(reloc); } out_prevalid: + if (!IS_ERR(reloc)) + u_free(reloc); u_free(bo); u_free(push); |