CVE-2021-47503

Name	CVE-2021-47503
Description	In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc() Calling scsi_remove_host() before scsi_add_host() results in a crash: BUG: kernel NULL pointer dereference, address: 0000000000000108 RIP: 0010:device_del+0x63/0x440 Call Trace: device_unregister+0x17/0x60 scsi_remove_host+0xee/0x2a0 pm8001_pci_probe+0x6ef/0x1b90 [pm80xx] local_pci_probe+0x3f/0x90 We cannot call scsi_remove_host() in pm8001_alloc() because scsi_add_host() has not been called yet at that point in time. Function call tree: pm8001_pci_probe() \| `- pm8001_pci_alloc() \| \| \| `- pm8001_alloc() \| \| \| `- scsi_remove_host() \| `- scsi_add_host()
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.218-1	fixed
	bullseye (security)	5.10.221-1	fixed
	bookworm	6.1.94-1	fixed
	bookworm (security)	6.1.99-1	fixed
	trixie	6.9.10-1	fixed
	sid	6.9.11-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
linux	source	buster	(not affected)
linux	source	bullseye	5.10.92-1
linux	source	(unstable)	5.15.15-1

[buster] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/653926205741add87a6cf452e21950eebc6ac10b (5.16-rc5)