From: Christophe JAILLET <christophe.jaillet@wanadoo.fr> mainline inclusion from mainline-v6.8-rc1 commit d8407f71ebeaeb6f50bd89791837873e44609708 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9T6MM CVE: CVE-2024-36015 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... ---------------------------------------------------------------------- ida_alloc() and ida_free() should be preferred to the deprecated ida_simple_get() and ida_simple_remove(). This is less verbose. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/ba9da12fdd5cdb2c28180b7160af5042447d803f.170296209... Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Chen Ridong <chenridong@huawei.com> --- drivers/char/ppdev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c index 38b46c7d1737..f6024d97fe70 100644 --- a/drivers/char/ppdev.c +++ b/drivers/char/ppdev.c @@ -299,7 +299,7 @@ static int register_device(int minor, struct pp_struct *pp) goto err; } - index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL); + index = ida_alloc(&ida_index, GFP_KERNEL); memset(&ppdev_cb, 0, sizeof(ppdev_cb)); ppdev_cb.irq_func = pp_irq; ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0; @@ -310,7 +310,7 @@ static int register_device(int minor, struct pp_struct *pp) if (!pdev) { pr_warn("%s: failed to register device!\n", name); rc = -ENXIO; - ida_simple_remove(&ida_index, index); + ida_free(&ida_index, index); goto err; } @@ -750,7 +750,7 @@ static int pp_release(struct inode *inode, struct file *file) if (pp->pdev) { parport_unregister_device(pp->pdev); - ida_simple_remove(&ida_index, pp->index); + ida_free(&ida_index, pp->index); pp->pdev = NULL; pr_debug(CHRDEV "%x: unregistered pardevice\n", minor); } -- 2.34.1