On 21/8/25 17:44, Peter Maydell wrote:
In pca9554_set_pin() we have a string property which we parse in order to set some non-string fields in the device state. So we call visit_type_str(), passing it the address of the local variable state_str.visit_type_str() will allocate a new copy of the string; we never free this string, so the result is a memory leak, detected by ASAN during a "make check" run: Direct leak of 5 byte(s) in 1 object(s) allocated from: #0 0x5d605212ede3 in malloc (/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/qemu-system-arm+0x21f1de3) ( BuildId: 3d5373c89317f58bfcd191a33988c7347714be14) #1 0x7f7edea57b09 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x62b09) (BuildId: 1eb6131419edb83b2178b68282 9a6913cf682d75) #2 0x7f7edea6d4d8 in g_strdup (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x784d8) (BuildId: 1eb6131419edb83b2178b68282 9a6913cf682d75) #3 0x5d6055289a91 in g_strdup_inline /usr/include/glib-2.0/glib/gstrfuncs.h:321:10 #4 0x5d6055289a91 in qobject_input_type_str /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../qapi/qo bject-input-visitor.c:542:12 #5 0x5d605528479c in visit_type_str /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../qapi/qapi-visit -core.c:349:10 #6 0x5d60528bdd87 in pca9554_set_pin /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../hw/gpio/pca9554.c:179:10 #7 0x5d60549bcbbb in object_property_set /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../qom/object.c:1450:5 #8 0x5d60549d2055 in object_property_set_qobject /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../qom/qom-qobject.c:28:10 #9 0x5d60549bcdf1 in object_property_set_str /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../qom/object.c:1458:15 #10 0x5d605439d077 in gb200nvl_bmc_i2c_init /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../hw/arm/aspeed.c:1267:5 #11 0x5d60543a3bbc in aspeed_machine_init /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-asan/../../hw/arm/aspeed.c:493:9 Make the state_str g_autofree, so that we will always free it, on both error-exit and success codepaths. Cc: qemu-sta...@nongnu.org Fixes: de0c7d543bca ("misc: Add a pca9554 GPIO device model") Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- hw/gpio/pca9554.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/gpio/pca9554.c b/hw/gpio/pca9554.c index de3f883aee9..eac0d23be34 100644 --- a/hw/gpio/pca9554.c +++ b/hw/gpio/pca9554.c @@ -174,7 +174,7 @@ static void pca9554_set_pin(Object *obj, Visitor *v, const char *name, PCA9554State *s = PCA9554(obj); int pin, rc, val; uint8_t state, mask; - char *state_str; + g_autofree char *state_str = NULL;if (!visit_type_str(v, name, &state_str, errp)) {return;
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
