Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: never defer requests during idmap lookup During v4 request compound arg decoding, some ops (e.g. SETATTR) can trigger idmap lookup upcalls. When those upcall responses get delayed beyond the allowed time limit, cache_check() will mark the request for deferral and cause it to be dropped. This prevents nfs4svc_encode_compoundres from being executed, and thus the session slot flag NFSD4_SLOT_INUSE never gets cleared. Subsequent client requests will fail with NFSERR_JUKEBOX, given that the slot will be marked as in-use, making the SEQUENCE op fail. Fix this by making sure that the RQ_USEDEFERRAL flag is always clear during nfs4svc_decode_compoundargs(), since no v4 request should ever be deferred.
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
2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < b9abb760db20504240a7147f27934d900cd80b23affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < 3a72c7dedc99b321e0f267e4e999e5baf07c4593affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < 99e17b20fddac19a228d213e00f6b9e1c10daff9affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < 243f71ed873ff3feeb6f9b5cb145d63f7188b4c4affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < 063a6f22478ef929625000a2caf54667725c1dfdaffected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < d75ec4504a4340b033b15cad0303988b3089dd93affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < 8dff54fe88c0dcd4c55bff9fc2fa6ca968290826affected2f425878b6a71571341dcd3f9e9d1a6f6355da9c to < f9c206cdc4266caad6a9a7f46341420a10f03ccbaffected
Linux Linux
Default version status: affected
2.6.30affected0 to < 2.6.30unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.14 to ≤ 6.18.*unaffected6.19.4 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23 ↗
- https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593 ↗
- https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9 ↗
- https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4 ↗
- https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd ↗
- https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93 ↗
- https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826 ↗
- https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb ↗