Description
In the Linux kernel, the following vulnerability has been resolved: ubi: Fix possible null-ptr-deref in ubi_free_volume() It willl cause null-ptr-deref in the following case: uif_init() ubi_add_volume() cdev_add() -> if it fails, call kill_volumes() device_register() kill_volumes() -> if ubi_add_volume() fails call this function ubi_free_volume() cdev_del() device_unregister() -> trying to delete a not added device, it causes null-ptr-deref So in ubi_free_volume(), it delete devices whether they are added or not, it will causes null-ptr-deref. Handle the error case whlie calling ubi_add_volume() to fix this problem. If add volume fails, set the corresponding vol to null, so it can not be accessed in kill_volumes() and release the resource in ubi_add_volume() error path.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
801c135ce73d5df1caf3eca35b66a10824ae0707 to < 5558bcf1c58720ca6e9d6198d921cb3aa337f038affected801c135ce73d5df1caf3eca35b66a10824ae0707 to < 45b2c5ca4d2edae70f19fdb086bd927840c4c309affected801c135ce73d5df1caf3eca35b66a10824ae0707 to < 234c53e57424992e657e6f4acc00d3df0983176faffected801c135ce73d5df1caf3eca35b66a10824ae0707 to < fcbc795abe7897da4b5d2a6ab5010e36774b00c2affected801c135ce73d5df1caf3eca35b66a10824ae0707 to < 5ec4c8aca5a221756a9007deadfea92795319feeaffected801c135ce73d5df1caf3eca35b66a10824ae0707 to < 2ea7195b195009ecf0046e55361f393ba96d02dbaffected801c135ce73d5df1caf3eca35b66a10824ae0707 to < 9eccdb0760cbcb4427b5303a83a3007de998af51affected801c135ce73d5df1caf3eca35b66a10824ae0707 to < c15859bfd326c10230f09cb48a17f8a35f190342affected
Linux Linux
Default version status: affected
2.6.22affected0 to < 2.6.22unaffected4.14.308 to ≤ 4.14.*unaffected4.19.276 to ≤ 4.19.*unaffected5.4.235 to ≤ 5.4.*unaffected5.10.173 to ≤ 5.10.*unaffected5.15.100 to ≤ 5.15.*unaffected6.1.18 to ≤ 6.1.*unaffected6.2.5 to ≤ 6.2.*unaffected6.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/5558bcf1c58720ca6e9d6198d921cb3aa337f038 ↗
- https://git.kernel.org/stable/c/45b2c5ca4d2edae70f19fdb086bd927840c4c309 ↗
- https://git.kernel.org/stable/c/234c53e57424992e657e6f4acc00d3df0983176f ↗
- https://git.kernel.org/stable/c/fcbc795abe7897da4b5d2a6ab5010e36774b00c2 ↗
- https://git.kernel.org/stable/c/5ec4c8aca5a221756a9007deadfea92795319fee ↗
- https://git.kernel.org/stable/c/2ea7195b195009ecf0046e55361f393ba96d02db ↗
- https://git.kernel.org/stable/c/9eccdb0760cbcb4427b5303a83a3007de998af51 ↗
- https://git.kernel.org/stable/c/c15859bfd326c10230f09cb48a17f8a35f190342 ↗