{"id":"CVE-2026-72063","summary":"gpio: tegra: do not call pinctrl for GPIO direction","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: tegra: do not call pinctrl for GPIO direction\n\ntegra_gpio_direction_input() and tegra_gpio_direction_output() already\nprogram the GPIO controller direction registers directly. The additional\npinctrl_gpio_direction_input/output() calls do not add a Tegra pinctrl\noperation, because the Tegra pinmux ops provide GPIO request/free\nhandling but no gpio_set_direction hook.\n\nThe extra call still enters the pinctrl core and takes pctldev-\u003emutex.\nShared GPIO users can call the direction path while holding their\nper-line spinlock, so this otherwise redundant pinctrl direction call can\nsleep in an atomic context.\n\nThis was found by our static analysis tool and then confirmed by manual\nreview of tegra_gpio_probe(), the Tegra GPIO direction callbacks and the\nTegra pinctrl ops. The reviewed path has a default non-sleeping\nstruct gpio_chip while the direction callback still enters the pinctrl\nmutex path.\n\nA directed runtime validation kept the same non-sleeping chip registration\nand drove:\n\n  gpio_shared_proxy_direction_output()\n  gpiod_direction_output_raw_commit()\n  tegra_gpio_direction_output()\n  pinctrl_gpio_direction_output()\n\nLockdep reported a sleep-in-atomic warning with the shared GPIO spinlock\nheld and pinctrl_get_device_gpio_range() plus tegra_gpio_direction_output()\non the stack.\n\nDo not mark the whole chip as can_sleep to paper over this: can_sleep\ndescribes whether get()/set() may sleep, and Tegra value access is MMIO.\nRemove the redundant pinctrl direction calls and keep pinctrl involvement\nin the existing request/free path.","modified":"2026-08-25T03:51:41.520906054Z","published":"2026-08-15T05:52:17.315Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72063.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/616188becd4a208afbae1653fc5241e1748bae80"},{"type":"WEB","url":"https://git.kernel.org/stable/c/628c63f96f4564fa145f602af2d41daf9532201f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89904b4f1dc0f9550c3f206dcdfceed0b7ce7c49"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac761e66708d51dac35c4c7f1891ea991dc788f0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd17c5a1d9f186b57e9e2949be427803b7110a5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3b92d16e1c4debec7526b6dbb2d98d0aeed796b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e57a4845b0da60a7b9f052160878097826320954"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72063.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72063"},{"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":"11da905412833d9b369a6a09a401f87149d674dc"},{"fixed":"89904b4f1dc0f9550c3f206dcdfceed0b7ce7c49"},{"fixed":"d3b92d16e1c4debec7526b6dbb2d98d0aeed796b"},{"fixed":"616188becd4a208afbae1653fc5241e1748bae80"},{"fixed":"e57a4845b0da60a7b9f052160878097826320954"},{"fixed":"cd17c5a1d9f186b57e9e2949be427803b7110a5c"},{"fixed":"ac761e66708d51dac35c4c7f1891ea991dc788f0"},{"fixed":"628c63f96f4564fa145f602af2d41daf9532201f"},{"fixed":"d3e91a95b2b0fc6336dbf3ec90d831a1654d2720"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72063.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.1.0"},{"fixed":"5.10.266"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.217"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.184"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72063.json"}}],"schema_version":"1.9.0"}