CVE-2022-49839

scsi: scsi_transport_sas: Fix error handling in sas_phy_add()

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_transport_sas: Fix error handling in sas_phy_add() If transport_add_device() fails in sas_phy_add(), the kernel will crash trying to delete the device in transport_remove_device() called from sas_remove_host(). Unable to handle kernel NULL pointer dereference at virtual address 0000000000000108 CPU: 61 PID: 42829 Comm: rmmod Kdump: loaded Tainted: G W 6.1.0-rc1+ #173 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : device_del+0x54/0x3d0 lr : device_del+0x37c/0x3d0 Call trace: device_del+0x54/0x3d0 attribute_container_class_device_del+0x28/0x38 transport_remove_classdev+0x6c/0x80 attribute_container_device_trigger+0x108/0x110 transport_remove_device+0x28/0x38 sas_phy_delete+0x30/0x60 [scsi_transport_sas] do_sas_phy_delete+0x6c/0x80 [scsi_transport_sas] device_for_each_child+0x68/0xb0 sas_remove_children+0x40/0x50 [scsi_transport_sas] sas_remove_host+0x20/0x38 [scsi_transport_sas] hisi_sas_remove+0x40/0x68 [hisi_sas_main] hisi_sas_v2_remove+0x20/0x30 [hisi_sas_v2_hw] platform_remove+0x2c/0x60 Fix this by checking and handling return value of transport_add_device() in sas_phy_add().

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/03aabcb88aeeb7221ddb6196ae84ad5fb17b743f patch
https://git.kernel.org/stable/c/2f21d653c648735657e23948b1d7ac7273de0f87 patch
https://git.kernel.org/stable/c/c736876ee294bb4f271d76a25cc7d70c8537bc5d patch
https://git.kernel.org/stable/c/5d7bebf2dfb0dc97aac1fbace0910e557ecdb16f patch

Frequently Asked Questions

What is the severity of CVE-2022-49839?
CVE-2022-49839 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49839?
To fix CVE-2022-49839, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49839 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49839 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49839?
CVE-2022-49839 affects Linux Linux, Linux Linux.
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