CVE-2022-49824

Summary

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

ata: libata-transport: fix error handling in ata_tlink_add()

In ata_tlink_add(), the return value of transport_add_device() is not checked. As a result, it causes null-ptr-deref while removing the module, because transport_remove_device() is called to remove the device that was not added.

Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0 CPU: 33 PID: 13850 Comm: rmmod Kdump: loaded Tainted: G W 6.1.0-rc3+ #12 pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=–) pc : device_del+0x48/0x39c lr : device_del+0x44/0x39c Call trace: device_del+0x48/0x39c attribute_container_class_device_del+0x28/0x40 transport_remove_classdev+0x60/0x7c attribute_container_device_trigger+0x118/0x120 transport_remove_device+0x20/0x30 ata_tlink_delete+0x88/0xb0 [libata] ata_tport_delete+0x2c/0x60 [libata] ata_port_detach+0x148/0x1b0 [libata] ata_pci_remove_one+0x50/0x80 [libata] ahci_remove_one+0x4c/0x8c [ahci]

Fix this by checking and handling return value of transport_add_device() in ata_tlink_add().

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/7377a14598f6b04446c54bc4a50cd249470d6c6f
• https://git.kernel.org/stable/c/67b219314628b90b3a314528e177335b0cd5c70b
• https://git.kernel.org/stable/c/d5234480ca822bdcf03fe4d6a590ddcb854558f7
• https://git.kernel.org/stable/c/cf0816f6322c5c37ee52655f928e91ecf32da103

• ←Previous
• Next→