The patch titled
Subject: coredump: fix core_pipe_limit sysctl proc_handler
has been added to the -mm mm-nonmm-unstable branch. Its filename is
coredump-fixes-core_pipe_limit-sysctl-proc_handler.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/coredump-fixes-core_pipe_limit-sysctl-proc_handler.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Nicolas Bouchinet <nicolas.bouchinet@xxxxxxxxxxx>
Subject: coredump: fix core_pipe_limit sysctl proc_handler
Date: Wed, 15 Jan 2025 14:22:08 +0100
Patch series " Fixes multiple sysctl proc_handler usage error", v4.
While reading sysctl code I encountered two sysctl proc_handler parameters
common errors.
The first one is to declare .data as a different type thant the return of
the used .proc_handler, i.e. using proch_dointvec, thats convert a char
string to signed integers, and storing the result in a .data that is
backed by an unsigned int. User can then write "-1" string, which results
in a different value stored in the .data variable. This can lead to type
conversion errors in branches and thus to potential security issues.
