In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO<\/p>\n
rtl83xx_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:<\/p>\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<\/p>\n
Switch both helpers to gpiod_set_value_cansleep() so such a reset GPIO can
\nbe used without triggering the warning.<\/p>\n
The 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.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO<\/p>\n
rtl83xx_reset_assert() and rtl83xx_reset_deassert() are only called<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21332","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}