Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

net: hns3: fix kernel crash when 1588 is received on HIP08 devices

The HIP08 devices does not register the ptp devices, so the hdev->ptp is NULL, but the hardware can receive 1588 messages, and set the HNS3_RXD_TS_VLD_B bit, so, if match this case, the access of hdev->ptp->flags will cause a kernel crash:

[ 5888.946472] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018 [ 5888.946475] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018 ... [ 5889.266118] pc : hclge_ptp_get_rx_hwts+0x40/0x170 [hclge] [ 5889.272612] lr : hclge_ptp_get_rx_hwts+0x34/0x170 [hclge] [ 5889.279101] sp : ffff800012c3bc50 [ 5889.283516] x29: ffff800012c3bc50 x28: ffff2040002be040 [ 5889.289927] x27: ffff800009116484 x26: 0000000080007500 [ 5889.296333] x25: 0000000000000000 x24: ffff204001c6f000 [ 5889.302738] x23: ffff204144f53c00 x22: 0000000000000000 [ 5889.309134] x21: 0000000000000000 x20: ffff204004220080 [ 5889.315520] x19: ffff204144f53c00 x18: 0000000000000000 [ 5889.321897] x17: 0000000000000000 x16: 0000000000000000 [ 5889.328263] x15: 0000004000140ec8 x14: 0000000000000000 [ 5889.334617] x13: 0000000000000000 x12: 00000000010011df [ 5889.340965] x11: bbfeff4d22000000 x10: 0000000000000000 [ 5889.347303] x9 : ffff800009402124 x8 : 0200f78811dfbb4d [ 5889.353637] x7 : 2200000000191b01 x6 : ffff208002a7d480 [ 5889.359959] x5 : 0000000000000000 x4 : 00000000…