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https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10.git
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Waiman Long
6daab4673f
JIRA: https://issues.redhat.com/browse/RHEL-152433
Conflicts:
1) A context diff with the kernel/pid_namespace.c hunk due to missing
upstream commit 7863dcc72d0f ("pid: allow pid_max to be set per
pid namespace").
2) A context diff with the net/core/net_namespace.c hunk due to
missing upstream commit e57a6320215c ("net: Add net_passive_inc()
and net_passive_dec().").
commit edd3cb05c00a040dc72bed20b14b5ba865188bce
Author: Simon Schuster <schuster.simon@siemens-energy.com>
Date: Mon, 1 Sep 2025 15:09:51 +0200
copy_process: pass clone_flags as u64 across calltree
With the introduction of clone3 in commit 7f192e3cd3 ("fork: add
clone3") the effective bit width of clone_flags on all architectures was
increased from 32-bit to 64-bit, with a new type of u64 for the flags.
However, for most consumers of clone_flags the interface was not
changed from the previous type of unsigned long.
While this works fine as long as none of the new 64-bit flag bits
(CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP) are evaluated, this is still
undesirable in terms of the principle of least surprise.
Thus, this commit fixes all relevant interfaces of callees to
sys_clone3/copy_process (excluding the architecture-specific
copy_thread) to consistently pass clone_flags as u64, so that
no truncation to 32-bit integers occurs on 32-bit architectures.
Signed-off-by: Simon Schuster <schuster.simon@siemens-energy.com>
Link: https://lore.kernel.org/20250901-nios2-implement-clone3-v2-2-53fcf5577d57@siemens-energy.com
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Waiman Long <longman@redhat.com>