{"id":"CVE-2026-80999","summary":"net: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO\n\nrtl83xx_reset_assert() and rtl83xx_reset_deassert() are only called from\nthe probe path, which may sleep and is not timing-critical.  When the\nreset GPIO is provided by a sleeping controller such as an I2C I/O\nexpander, gpiod_set_value() warns:\n\n  WARNING: drivers/gpio/gpiolib.c:4030 at gpiod_set_value+0x44/0x80, CPU#1: kworker/u16:4/61\n  Hardware name: B&O MAP CA33 Rev f (UNKNOWN) (DT)\n  Workqueue: events_unbound deferred_probe_work_func\n  pc : gpiod_set_value+0x44/0x80\n  lr : rtl83xx_probe+0x1d8/0x3a0\n  Call trace:\n   gpiod_set_value+0x44/0x80 (P)\n   rtl83xx_probe+0x1d8/0x3a0\n   realtek_mdio_probe+0x24/0xa0\n   mdio_probe+0x38/0x78\n   really_probe+0xc4/0x3e0\n   __driver_probe_device+0x15c/0x1b8\n   driver_probe_device+0xb4/0x120\n   __device_attach_driver+0xb8/0x1a0\n   bus_for_each_drv+0x88/0xf0\n   __device_attach+0xa0/0x1d8\n   device_initial_probe+0x54/0x68\n   bus_probe_device+0x38/0xa0\n   deferred_probe_work_func+0xb8/0x120\n   process_one_work+0x184/0x4e8\n   worker_thread+0x188/0x308\n   kthread+0x130/0x150\n   ret_from_fork+0x10/0x20\n\nSwitch both helpers to gpiod_set_value_cansleep() so such a reset GPIO can\nbe used without triggering the warning.\n\nThe reset GPIO has been driven with the non-sleeping gpiod_set_value()\nsince the driver was added in v4.19.  The call has since been refactored\nacross several files - from realtek-smi.c / realtek-mdio.c into the common\nrtl83xx.c module and then into the rtl83xx_reset_assert() and\nrtl83xx_reset_deassert() helpers (both in v6.9).  This patch therefore\napplies as-is only to kernels that carry those helpers (v6.9+); older\nstable kernels need the same gpiod_set_value_cansleep() conversion at the\ncorresponding open-coded call sites.","modified":"2026-09-13T03:47:10.765457913Z","published":"2026-09-11T19:42:53.509Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80999.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1610a8c2b93e815e3dc8643a2a69ab1c37975a6a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c32cf5292a0dd70c4afc138b4dc45743a190cd5a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f71087e7c63aa3e99bf65d7ddf91eb4fd3545778"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb58b6a696b30bcbfbe0cfc0a91b19c816a955fc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80999.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80999"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d8652956cf37c5caa8c19e0b99ce5ca235c6d5de"},{"fixed":"c32cf5292a0dd70c4afc138b4dc45743a190cd5a"},{"fixed":"f71087e7c63aa3e99bf65d7ddf91eb4fd3545778"},{"fixed":"1610a8c2b93e815e3dc8643a2a69ab1c37975a6a"},{"fixed":"fb58b6a696b30bcbfbe0cfc0a91b19c816a955fc"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80999.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80999.json"}}],"schema_version":"1.9.0"}