{"schema_version":"1.7.5","id":"CVE-2025-40070","published":"2025-10-28T11:48:38.838Z","modified":"2026-07-16T03:30:58.813843699Z","related":["SUSE-SU-2025:4393-1","SUSE-SU-2025:4422-1","SUSE-SU-2025:4505-1","SUSE-SU-2025:4515-1","SUSE-SU-2025:4516-1","SUSE-SU-2025:4517-1","SUSE-SU-2025:4521-1","SUSE-SU-2026:20012-1","SUSE-SU-2026:20015-1","SUSE-SU-2026:20021-1","SUSE-SU-2026:20039-1","SUSE-SU-2026:20059-1","SUSE-SU-2026:20473-1","SUSE-SU-2026:20496-1","SUSE-SU-2026:20562-1","openSUSE-SU-2025:15702-1","openSUSE-SU-2025:20172-1","openSUSE-SU-2026:10301-1"],"summary":"pps: fix warning in pps_register_cdev when register device fail","details":"In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n  RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Call Trace:\n   <TASK>\n   kobject_cleanup+0x136/0x410 lib/kobject.c:689\n   kobject_release lib/kobject.c:720 [inline]\n   kref_put include/linux/kref.h:65 [inline]\n   kobject_put+0xe9/0x130 lib/kobject.c:737\n   put_device+0x24/0x30 drivers/base/core.c:3797\n   pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n   pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n   pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n   tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n   tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n   tiocsetd drivers/tty/tty_io.c:2429 [inline]\n   tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:598 [inline]\n   __se_sys_ioctl fs/ioctl.c:584 [inline]\n   __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure 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