Linux libata-scsi: Out-of-bounds write in scsi_pass_thru_sense_field

漏洞概述 该漏洞涉及 模块在处理 命令时，对设备响应数据的处理存在越界问题。当设备返回的响应数据长度超过预期时，内核可能会尝试写入超出缓冲区范围的数据，导致潜在的内存破坏或系统崩溃。 影响范围 受影响模块: 受影响函数: 触发条件: 当设备返回的响应数据长度超过预期时，特别是当 值大于 14 时。 修复方案 修复方案包括在写入数据前进行边界检查，确保不会超出缓冲区范围。具体修改如下： ```c diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 71c2b2b2e8a..1f8a8e81 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1012,10 +1012,14 @@ static void scsi_pass_thru_sense_field(struct ata_qcmd qc, u8 s) { u8 s = s; u8 len = s++; if (len > 14) { / The descriptor is written at s + len and is 14 bytes long, so it needs len + 22 bytes of data. If len > 14, we need to write more than 36 bytes. / if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14; len -= 14; } if (len > 14) { s += 14

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Linux libata-scsi: Out-of-bounds write in scsi_pass_thru_sense_field

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