[PATCH] drm/amdgpu/jpeg: Fix sprintf buffer overflow warning in jpeg_v2_5
From: Michal Simek
Date: Tue Apr 14 2026 - 02:03:02 EST
Replace sprintf() with snprintf() to fix the -Werror=format-overflow
warning when building with allmodconfig:
drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c:152:47: error: '%d' directive
writing between 1 and 11 bytes into a region of size 7
[-Werror=format-overflow=]
152 | sprintf(ring->name, "jpeg_dec_%d", i);
The ring->name buffer is 16 bytes. Using snprintf() with sizeof()
ensures the buffer cannot overflow regardless of the integer value.
Signed-off-by: Michal Simek <michal.simek@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
index 20983f126b49..fe2b049afac3 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
@@ -149,7 +149,7 @@ static int jpeg_v2_5_sw_init(struct amdgpu_ip_block *ip_block)
else
ring->vm_hub = AMDGPU_MMHUB0(0);
ring->doorbell_index = (adev->doorbell_index.vcn.vcn_ring0_1 << 1) + 1 + 8 * i;
- sprintf(ring->name, "jpeg_dec_%d", i);
+ snprintf(ring->name, sizeof(ring->name), "jpeg_dec_%d", i);
r = amdgpu_ring_init(adev, ring, 512, &adev->jpeg.inst[i].irq,
0, AMDGPU_RING_PRIO_DEFAULT, NULL);
if (r)
--
2.43.0
base-commit: def01be0116ec66f7903e49ededad78e49717109
branch: master