md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry
When a read is retried, raid1_read_request() may be called with a
pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT
read, the bio is completed and the function returns immediately. In this
case the existing r1_bio is leaked.
This fixes a leak of pre-allocated r1_bio structures for retried reads.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201ehttps://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5edhttps://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef