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PUBLISHED

CVE-2022-48636

s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup

Reserved:2024-02-25
Published:2024-04-28
Updated:2024-06-07

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.

Product status

Default status
unaffected

8e09f21574ea before d86b4267834e
affected

8e09f21574ea before 49f401a98b31
affected

8e09f21574ea before aaba5ff27420
affected

8e09f21574ea before 2e473351400e
affected

8e09f21574ea before f5fcc9d6d71d
affected

8e09f21574ea before d3a67c21b18f
affected

8e09f21574ea before 650a2e79d176
affected

8e09f21574ea before db7ba07108a4
affected

Default status
affected

2.6.25
affected

Any version before 2.6.25
unaffected

4.9.330
unaffected

4.14.295
unaffected

4.19.260
unaffected

5.4.215
unaffected

5.10.146
unaffected

5.15.71
unaffected

5.19.12
unaffected

6.0
unaffected

References

https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70

https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4

https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1

https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1

https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b

https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6

https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036ac

https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992d

cve.org CVE-2022-48636

nvd.nist.gov CVE-2022-48636

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