Description: mm: cachestat: fix folio read-after-free in cache walk
References:
Notes:
 carnil> Introduced in cf264e1329fb ("cachestat: implement cachestat syscall").
 carnil> Vulnerable versions: 6.5-rc1.
Bugs:
upstream: released (6.8-rc7) [3a75cb05d53f4a6823a32deb078de1366954a804]
6.7-upstream-stable: released (6.7.9) [fe7e008e0ce728252e4ec652cceebcc62211657c]
6.6-upstream-stable: released (6.6.21) [ba60fdf75e89ea762bb617be578dc47f27655117]
6.1-upstream-stable: N/A "Vulnerable code not present"
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.9-1)
6.1-bookworm-security: N/A "Vulnerable code not present"
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"