CVE-2025-38393 Information

Jul 26, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN

We found a few different systems hung up in writeback waiting on the same page lock and one task waiting on the NFS_LAYOUT_DRAIN bit in pnfs_update_layout() however the pnfs_layout_hdr’s plh_outstanding count was zero.

It seems most likely that this is another race between the waiter and waker similar to commit ed0172af5d6f (\SUNRPC: Fix a race to wake a sync task). Fix it up by applying the advised barrier.

Reference

https://git.kernel.org/stable/c/08287df60bac5b008b6bcdb03053988335d3d282 https://git.kernel.org/stable/c/1f4da20080718f258e189a2c5f515385fa393da6 https://git.kernel.org/stable/c/864a54c1243ed3ca60baa4bc492dede1361f4c83 https://git.kernel.org/stable/c/8846fd02c98da8b79e6343a20e6071be6f372180 https://git.kernel.org/stable/c/8ca65fa71024a1767a59ffbc6a6e2278af84735e https://git.kernel.org/stable/c/c01776287414ca43412d1319d2877cbad65444ac https://git.kernel.org/stable/c/e4b13885e7ef1e64e45268feef1e5f0707c47e72

CNNVD-202507-3221 (Published: 2025-07-25)

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