CVE-2025-40070

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> pps: fix warning in pps_register_cdev when register device fail<br /> <br /> Similar to previous commit 2a934fdb01db ("media: v4l2-dev: fix error<br /> handling in __video_register_device()"), the release hook should be set<br /> before device_register(). Otherwise, when device_register() return error<br /> and put_device() try to callback the release function, the below warning<br /> may happen.<br /> <br /> ------------[ cut here ]------------<br /> WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567<br /> Modules linked in:<br /> CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE<br /> RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567<br /> Call Trace:<br /> <br /> kobject_cleanup+0x136/0x410 lib/kobject.c:689<br /> kobject_release lib/kobject.c:720 [inline]<br /> kref_put include/linux/kref.h:65 [inline]<br /> kobject_put+0xe9/0x130 lib/kobject.c:737<br /> put_device+0x24/0x30 drivers/base/core.c:3797<br /> pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402<br /> pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108<br /> pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57<br /> tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432<br /> tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563<br /> tiocsetd drivers/tty/tty_io.c:2429 [inline]<br /> tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728<br /> vfs_ioctl fs/ioctl.c:51 [inline]<br /> __do_sys_ioctl fs/ioctl.c:598 [inline]<br /> __se_sys_ioctl fs/ioctl.c:584 [inline]<br /> __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584<br /> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]<br /> do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94<br /> entry_SYSCALL_64_after_hwframe+0x76/0x7e<br /> <br /> <br /> Before commit c79a39dc8d06 ("pps: Fix a use-after-free"),<br /> pps_register_cdev() call device_create() to create pps-&gt;dev, which will<br /> init dev-&gt;release to device_create_release(). Now the comment is outdated,<br /> just remove it.<br /> <br /> Thanks for the reminder from Calvin Owens, &amp;#39;kfree_pps&amp;#39; should be removed<br /> in pps_register_source() to avoid a double free in the failure case.