Anthony Iliopoulos

nfsd: never defer requests during idmap lookup
ANBZ: #36270
commit b9abb760db20504240a7147f27934d900cd80b23 stable.
commit f9c206cdc4266caad6a9a7f46341420a10f03ccb upstream.
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.
Fixes: 2f425878b6a7 (“nfsd: don’t use the deferral service, return NFS4ERR_DELAY”)
Signed-off-by: Anthony Iliopoulos ailiop@suse.com
Reviewed-by: NeilBrown neil@brown.name
Signed-off-by: Chuck Lever chuck.lever@oracle.com
Signed-off-by: Sasha Levin sashal@kernel.org
[ Fix conflicts by still return !nfsd4_decode_compound() ]
Fixes: CVE-2026-45983
Assisted-by: PatchPilot patchpilot@openanolis.org
Signed-off-by: Joseph Qi joseph.qi@linux.alibaba.com
Link: https://gitee.com/anolis/cloud-kernel/pulls/10883

2天前1000018次提交

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Cloud Kernel 是龙蜥操作系统(Anolis OS)内核，目前已经达到 600 多万部署规模. 它基于Linux社区主线稳定版. 致力于打造更稳定, 更可靠, 更安全, 特性更丰富, 性能更优化的 Linux 系统内核. 为 Anolis OS 以及下游生态合作 OS 发行版提供坚实的内核支持, 更好的支撑和扩展上层业务应用.

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