sched_ext: Fix uninitialized ret in scx_alloc_and_add_sched()

Browse source

Under CONFIG_EXT_SUB_SCHED, the kzalloc() and kstrdup() failure
paths jump to err_stop_helper without first setting ret. The
function then returns ERR_PTR(ret) with ret uninitialized, which
can produce ERR_PTR(0) (NULL), causing the caller's IS_ERR() check
to pass and leading to a NULL pointer dereference.

Set ret = -ENOMEM before each goto to fix the error path.

Fixes: ebeca1f930 ("sched_ext: Introduce cgroup sub-sched support")
Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

...

This commit is contained in:

Cheng-Yang Chou 2026-03-14 09:39:34 +08:00 • committed by Tejun Heo

parent 12b49dd15e

commit e36bc38ebf

1 changed files with 6 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

kernel/sched/ext.c

View file