416baaa9-dc9f-4396-8d5f-8c081fb06d67NVD:CVE-2023-52615CVE-2023-52615
In the Linux kernel, the following vulnerability has been resolved:
hwrng: core - Fix page fault dead lock on mmap-ed hwrng
There is a dead-lock in the hwrng device read path. This triggers
when the user reads from /dev/hwrng into memory also mmap-ed from
/dev/hwrng. The resulting page fault triggers a recursive read
which then dead-locks.
Fix this by using a stack buffer when calling copy_to_user.
References
git.kernel.org/stable/c/26cc6d7006f922df6cc4389248032d955750b2a0
git.kernel.org/stable/c/5030d4c798863ccb266563201b341a099e8cdd48
git.kernel.org/stable/c/6822a14271786150e178869f1495cc03e74c5029
git.kernel.org/stable/c/78aafb3884f6bc6636efcc1760c891c8500b9922
git.kernel.org/stable/c/aa8aa16ed9adf1df05bb339d588cf485a011839e
git.kernel.org/stable/c/c6a8111aacbfe7a8a70f46cc0de8eed00561693c
git.kernel.org/stable/c/eafd83b92f6c044007a3591cbd476bcf90455990
git.kernel.org/stable/c/ecabe8cd456d3bf81e92c53b074732f3140f170d
lists.debian.org/debian-lts-announce/2024/06/msg00017.html
lists.debian.org/debian-lts-announce/2024/06/msg00020.html
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