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| author | Boris Brezillon <boris.brezillon@collabora.com> | 2024-09-30 19:37:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-10 13:01:07 +0300 |
| commit | ac2ca5e5148a0d4d78ac01c2d8348d0757c7367f (patch) | |
| tree | 63ebe81d1298d456c9cf2c88ada468c27796a8af | |
| parent | a3a1c41da56f888536e19a465ff6e55b089e11ff (diff) | |
| download | linux-ac2ca5e5148a0d4d78ac01c2d8348d0757c7367f.tar.xz | |
drm/panthor: Fix access to uninitialized variable in tick_ctx_cleanup()
commit 282864cc5d3f144af0cdea1868ee2dc2c5110f0d upstream.
The group variable can't be used to retrieve ptdev in our second loop,
because it points to the previously iterated list_head, not a valid
group. Get the ptdev object from the scheduler instead.
Cc: <stable@vger.kernel.org>
Fixes: d72f049087d4 ("drm/panthor: Allow driver compilation")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Closes: https://lore.kernel.org/r/202409302306.UDikqa03-lkp@intel.com/
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240930163742.87036-1-boris.brezillon@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/panthor/panthor_sched.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c index 93bd60748148..41307daf13a9 100644 --- a/drivers/gpu/drm/panthor/panthor_sched.c +++ b/drivers/gpu/drm/panthor/panthor_sched.c @@ -2046,6 +2046,7 @@ static void tick_ctx_cleanup(struct panthor_scheduler *sched, struct panthor_sched_tick_ctx *ctx) { + struct panthor_device *ptdev = sched->ptdev; struct panthor_group *group, *tmp; u32 i; @@ -2054,7 +2055,7 @@ tick_ctx_cleanup(struct panthor_scheduler *sched, /* If everything went fine, we should only have groups * to be terminated in the old_groups lists. */ - drm_WARN_ON(&group->ptdev->base, !ctx->csg_upd_failed_mask && + drm_WARN_ON(&ptdev->base, !ctx->csg_upd_failed_mask && group_can_run(group)); if (!group_can_run(group)) { @@ -2077,7 +2078,7 @@ tick_ctx_cleanup(struct panthor_scheduler *sched, /* If everything went fine, the groups to schedule lists should * be empty. */ - drm_WARN_ON(&group->ptdev->base, + drm_WARN_ON(&ptdev->base, !ctx->csg_upd_failed_mask && !list_empty(&ctx->groups[i])); list_for_each_entry_safe(group, tmp, &ctx->groups[i], run_node) { |