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PUBLISHED

CVE-2021-47503

scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()

Assigner:Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
Reserved:2024-05-22
Published:2024-05-24
Updated:2024-06-06

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()

Product status

Default status
unaffected

05c6c029a44d before 1e434d2687e8
affected

05c6c029a44d before f8dccc1bdea7
affected

05c6c029a44d before 653926205741
affected

Default status
affected

5.10
affected

Any version before 5.10
unaffected

5.10.85
unaffected

5.15.8
unaffected

5.16
unaffected

References

https://git.kernel.org/stable/c/1e434d2687e8bc0b3cdc9dd093c0e9047c0b4add

https://git.kernel.org/stable/c/f8dccc1bdea7e21b5ec06c957aef8831c772661c

https://git.kernel.org/stable/c/653926205741add87a6cf452e21950eebc6ac10b

cve.org CVE-2021-47503

nvd.nist.gov CVE-2021-47503

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