diff options
| author | Xiaolei Wang <xiaolei.wang@windriver.com> | 2021-12-06 20:05:33 +0800 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2021-12-16 15:32:48 +0100 |
| commit | 6add87fdae9bcb1d20b4503df5bd02ce5246cc8b (patch) | |
| tree | 280695bc0ea3dbcc87872e5e7fbff3ac0a334af0 | |
| parent | 18549bf4b21c739a9def39f27dcac53e27286ab5 (diff) | |
optee: Suppress false positive kmemleak report in optee_handle_rpc()
We observed the following kmemleak report:
unreferenced object 0xffff000007904500 (size 128):
comm "swapper/0", pid 1, jiffies 4294892671 (age 44.036s)
hex dump (first 32 bytes):
00 47 90 07 00 00 ff ff 60 00 c0 ff 00 00 00 00 .G......`.......
60 00 80 13 00 80 ff ff a0 00 00 00 00 00 00 00 `...............
backtrace:
[<000000004c12b1c7>] kmem_cache_alloc+0x1ac/0x2f4
[<000000005d23eb4f>] tee_shm_alloc+0x78/0x230
[<00000000794dd22c>] optee_handle_rpc+0x60/0x6f0
[<00000000d9f7c52d>] optee_do_call_with_arg+0x17c/0x1dc
[<00000000c35884da>] optee_open_session+0x128/0x1ec
[<000000001748f2ff>] tee_client_open_session+0x28/0x40
[<00000000aecb5389>] optee_enumerate_devices+0x84/0x2a0
[<000000003df18bf1>] optee_probe+0x674/0x6cc
[<000000003a4a534a>] platform_drv_probe+0x54/0xb0
[<000000000c51ce7d>] really_probe+0xe4/0x4d0
[<000000002f04c865>] driver_probe_device+0x58/0xc0
[<00000000b485397d>] device_driver_attach+0xc0/0xd0
[<00000000c835f0df>] __driver_attach+0x84/0x124
[<000000008e5a429c>] bus_for_each_dev+0x70/0xc0
[<000000001735e8a8>] driver_attach+0x24/0x30
[<000000006d94b04f>] bus_add_driver+0x104/0x1ec
This is not a memory leak because we pass the share memory pointer
to secure world and would get it from secure world before releasing it.
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| -rw-r--r-- | drivers/tee/optee/smc_abi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index 6196d7c3888f..cf2e3293567d 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -23,6 +23,7 @@ #include "optee_private.h" #include "optee_smc.h" #include "optee_rpc_cmd.h" +#include <linux/kmemleak.h> #define CREATE_TRACE_POINTS #include "optee_trace.h" @@ -783,6 +784,7 @@ static void optee_handle_rpc(struct tee_context *ctx, param->a4 = 0; param->a5 = 0; } + kmemleak_not_leak(shm); break; case OPTEE_SMC_RPC_FUNC_FREE: shm = reg_pair_to_ptr(param->a1, param->a2); |