Hey, Here is v1 of this patchset. Changelogs are in the individual commits.
Currently, when writing echo 18446744073709551616 > /proc/sys/fs/file-max /proc/sys/fs/file-max will overflow and be set to 0. That quickly crashes the system. Let's detect the overflow and set to ULONG_MAX in this case effectively capping the value. The patch tries to ensure that there is no other user visible change in behavior for other values. Only when a maximum value is set for a specific sysctl will it be capped on overflow. The details are outlined in the commit message of the first commit. (This patchset is in reference to https://lkml.org/lkml/2018/10/11/585.) Thanks! Christian Christian Brauner (2): sysctl: cap to ULONG_MAX in proc_get_long() sysctl: handle overflow for file-max kernel/sysctl.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) -- 2.17.1
