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charset="utf-8" struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Signed-off-by: Lizhi Hou Reviewed-by: Max Zhen --- drivers/accel/amdxdna/amdxdna_ctx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/accel/amdxdna/amdxdna_ctx.h b/drivers/accel/amdxdna/am= dxdna_ctx.h index e6155f4b5db0..010538cb05a3 100644 --- a/drivers/accel/amdxdna/amdxdna_ctx.h +++ b/drivers/accel/amdxdna/amdxdna_ctx.h @@ -56,7 +56,7 @@ struct amdxdna_cmd_chain { u32 submit_index; u32 error_index; u32 reserved[3]; - u64 data[] __counted_by(command_count); + u64 data[]; }; =20 /* --=20 2.34.1