mirror of https://github.com/OpenIPC/firmware.git
21 lines
754 B
Diff
21 lines
754 B
Diff
diff -drupN a/drivers/nfc/fdp/i2c.c b/drivers/nfc/fdp/i2c.c
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--- a/drivers/nfc/fdp/i2c.c 2018-08-06 17:23:04.000000000 +0300
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+++ b/drivers/nfc/fdp/i2c.c 2022-06-12 05:28:14.000000000 +0300
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@@ -177,6 +177,16 @@ static int fdp_nci_i2c_read(struct fdp_i
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/* Packet that contains a length */
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if (tmp[0] == 0 && tmp[1] == 0) {
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phy->next_read_size = (tmp[2] << 8) + tmp[3] + 3;
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+ /*
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+ * Ensure next_read_size does not exceed sizeof(tmp)
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+ * for reading that many bytes during next iteration
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+ */
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+ if (phy->next_read_size > FDP_NCI_I2C_MAX_PAYLOAD) {
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+ dev_dbg(&client->dev, "%s: corrupted packet\n",
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+ __func__);
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+ phy->next_read_size = 5;
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+ goto flush;
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+ }
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} else {
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phy->next_read_size = FDP_NCI_I2C_MIN_PAYLOAD;
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