Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix the maximum cell name length The kafs filesystem limits the maximum length of a cell to 256 bytes, but a problem occurs if someone actually does that: kafs tries to create a directory under /proc/net/afs/ with the name of the cell, but that fails with a warning: WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:405 because procfs limits the maximum filename length to 255. However, the DNS limits the maximum lookup length and, by extension, the maximum cell name, to 255 less two (length count and trailing NUL). Fix this by limiting the maximum acceptable cellname length to 253. This also allows us to be sure we can create the "/afs/.<cell>/" mountpoint too. Further, split the YFS VL record cell name maximum to be the 256 allowed by the protocol and ignore the record retrieved by YFSVL.GetCellName if it exceeds 253.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c3e9f888263bb4df11cbd623ceced02081cb2f9f to < 9340385468d056bb700b8f28df236b81fc86a079affectedc3e9f888263bb4df11cbd623ceced02081cb2f9f to < 7cb3e77e9b4e6ffa325a5559393d3283c9af3d01affectedc3e9f888263bb4df11cbd623ceced02081cb2f9f to < aabe47cf5ac5e1db2ae0635f189d836f67024904affectedc3e9f888263bb4df11cbd623ceced02081cb2f9f to < 7673030efe0f8ca1056d3849d61784c6caa052afaffectedc3e9f888263bb4df11cbd623ceced02081cb2f9f to < 7922b1f058fe24a93730511dd0ae2e1630920096affectedc3e9f888263bb4df11cbd623ceced02081cb2f9f to < 8fd56ad6e7c90ac2bddb0741c6b248c8c5d56ac8affected
Linux Linux
Default version status: affected
5.8affected0 to < 5.8unaffected5.10.234 to ≤ 5.10.*unaffected5.15.177 to ≤ 5.15.*unaffected6.1.125 to ≤ 6.1.*unaffected6.6.72 to ≤ 6.6.*unaffected6.12.10 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9340385468d056bb700b8f28df236b81fc86a079 ↗
- https://git.kernel.org/stable/c/7cb3e77e9b4e6ffa325a5559393d3283c9af3d01 ↗
- https://git.kernel.org/stable/c/aabe47cf5ac5e1db2ae0635f189d836f67024904 ↗
- https://git.kernel.org/stable/c/7673030efe0f8ca1056d3849d61784c6caa052af ↗
- https://git.kernel.org/stable/c/7922b1f058fe24a93730511dd0ae2e1630920096 ↗
- https://git.kernel.org/stable/c/8fd56ad6e7c90ac2bddb0741c6b248c8c5d56ac8 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗