From: Lizhi Hou <lizhi.hou@amd.com>
Date: Wed, 10 Jun 2026 15:11:27 +0000 (-0700)
Subject: accel/amdxdna: Fix mm_struct reference leak in aie2_populate_range()
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=2f41af638c92bac6f1f9275ea2d1901baef578f3;p=thirdparty%2Flinux.git

accel/amdxdna: Fix mm_struct reference leak in aie2_populate_range()

aie2_populate_range() jumps back to the again label without calling
mmput(mm), leaking a reference to the mm_struct.

Add the missing mmput() before jumping to again.

Fixes: e486147c912f ("accel/amdxdna: Add BO import and export")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260610151127.2994185-1-lizhi.hou@amd.com
---

diff --git a/drivers/accel/amdxdna/aie2_ctx.c b/drivers/accel/amdxdna/aie2_ctx.c
index 286379d9511d..eed3d0ec5413 100644
--- a/drivers/accel/amdxdna/aie2_ctx.c
+++ b/drivers/accel/amdxdna/aie2_ctx.c
@@ -999,6 +999,7 @@ again:
 
 		if (ret == -EBUSY) {
 			amdxdna_umap_put(mapp);
+			mmput(mm);
 			goto again;
 		}
 
@@ -1009,11 +1010,13 @@ again:
 	if (mmu_interval_read_retry(&mapp->notifier, mapp->range.notifier_seq)) {
 		up_write(&xdna->notifier_lock);
 		amdxdna_umap_put(mapp);
+		mmput(mm);
 		goto again;
 	}
 	mapp->invalid = false;
 	up_write(&xdna->notifier_lock);
 	amdxdna_umap_put(mapp);
+	mmput(mm);
 	goto again;
 
 put_mm: