Description: afs: Fix endless loop in directory parsing
References:
Notes:
 carnil> Introduced in 57e9d49c5452 ("afs: Hide silly-rename files from userspace").
 carnil> Vulnerable versions: 5.4.269 5.4.273 5.10.210 5.10.214 5.15.149 5.15.153 6.1.76
 carnil> 6.1.83 6.6.15 6.6.23 6.7.3 6.7.11 6.8-rc2.
Bugs:
upstream: released (6.8-rc7) [5f7a07646655fb4108da527565dcdc80124b14c4]
6.8-upstream-stable: released (6.8.2) [2afdd0cb02329464d77f3ec59468395c791a51a4]
6.7-upstream-stable: released (6.7.11) [9c41f4935625218a2053a2dce1423c3054169809]
6.6-upstream-stable: released (6.6.23) [106e14ca55a0acb3236ee98813a1d243f8aa2d05]
6.1-upstream-stable: released (6.1.83) [76426abf9b980b46983f97de8e5b25047b4c9863]
5.10-upstream-stable: released (5.10.214) [b94f434fe977689da4291dc21717790b9bd1c064]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.12-1)
6.1-bookworm-security: released (6.1.85-1)
5.10-bullseye-security: needed
4.19-buster-security: N/A "Vulnerable code not present"