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synaptics: Do not call memcpy with NULL data

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../libfprint/drivers/synaptics/bmkt_message.c:260:5: runtime error: null pointer passed as argument 2, which is declared to never be null
    #0 0x7fd21f154592 in bmkt_compose_message ../libfprint/drivers/synaptics/bmkt_message.c:260
    #1 0x7fd21f14596c in synaptics_sensor_cmd ../libfprint/drivers/synaptics/synaptics.c:417
    #2 0x7fd21f14d93f in dev_probe ../libfprint/drivers/synaptics/synaptics.c:1329
    #3 0x7fd21f0ca61d in device_idle_probe_cb ../libfprint/fp-device.c:375
    #4 0x7fd21f21a431 in timeout_dispatch ../libfprint/fpi-device.c:336
    #5 0x7fd2269cf70b in g_main_dispatch ../../glib/glib/gmain.c:3373
    #6 0x7fd2269d18de in g_main_context_dispatch_unlocked ../../glib/glib/gmain.c:4224
    #7 0x7fd2269d18de in g_main_context_iterate_unlocked ../../glib/glib/gmain.c:4289
    #8 0x7fd2269d1fef in g_main_context_iteration ../../glib/glib/gmain.c:4354
    #9 0x7fd21f0c5a85 in fp_context_enumerate ../libfprint/fp-context.c:575
This commit is contained in:
Marco Trevisan (Treviño)
2025-02-13 05:27:13 +01:00
committed by Marco Trevisan
parent 3e653fe85b
commit 7b2895271d
1 changed files with 2 additions and 1 deletions
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3
libfprint/drivers/synaptics/bmkt_message.c
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@@ -256,7 +256,8 @@ bmkt_compose_message (uint8_t *cmd, int *cmd_len, uint8_t msg_id, uint8_t seq_nu
cmd[BMKT_MESSAGE_SEQ_NUM_FIELD] = seq_num;
cmd[BMKT_MESSAGE_ID_FIELD] = msg_id;
cmd[BMKT_MESSAGE_PAYLOAD_LEN_FIELD] = payload_size;
memcpy (&cmd[BMKT_MESSAGE_PAYLOAD_FIELD], payload, payload_size);
if (payload_size > 0)
memcpy (&cmd[BMKT_MESSAGE_PAYLOAD_FIELD], payload, payload_size);
*cmd_len = message_len;