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pds_core: fix auxiliary device add/del races
In the Linux kernel, the following vulnerability has been resolved: pds_core: fix auxiliary device add/del races Two paths add or delete the same slot (pf->vfs[vf_id].padev): a VF's pdsc_reset_done() and the PF's devlink enable_vnet/disable_vnet handler. They serialize on config_lock, but neither guards the slot under it correctly. add() registers and stores a new auxiliary device without first checking the slot, so a second add of an already-populated slot leaks the first device. del() makes that check outside config_lock, so two concurrent dels can both pass it; the first clears the slot, and the second dereferences a NULL pointer. Check and update the slot under config_lock in both paths.
References
Affected products
- ==fec5f7af1d5f64a38f9224cd27b274d1af55a7ed
- <6.12.101
- <646b58b543f3bb1641e9123b75ff7799fe7b42f1
- =<6.6.*
- =<*
- <6.15
- <6.6.148
- ==6.15
- <6.15
- =<6.18.*
- =<6.12.*
- <bfa33cd513c7ceb93c5a4c30e5662acd73c0a916
- =<7.1.*
- <cf0ed2ba202f5c3b300ec1bf7ff0b5d555f7d518
- <bdeab32a7a91acd295d52a2d4ab1cc3f2da5e454
- <ef194751fed50cf3452017b63f00142a0ab40c70