Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: avoid device tree lookups in rtas_os_term() rtas_os_term() is called during panic. Its behavior depends on a couple of conditions in the /rtas node of the device tree, the traversal of which entails locking and local IRQ state changes. If the kernel panics while devtree_lock is held, rtas_os_term() as currently written could hang. Instead of discovering the relevant characteristics at panic time, cache them in file-static variables at boot. Note the lookup for "ibm,extended-os-term" is converted to of_property_read_bool() since it is a boolean property, not an RTAS function token. [mpe: Incorporate suggested change from Nick]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
088186ded490ced80758200cf8f906ed741df306 to < e23822c7381c59d9e42e65771b6e17c71ed30ea7affected088186ded490ced80758200cf8f906ed741df306 to < 06a07fbb32b3a23eec20a42b1e64474da0a3b33eaffected088186ded490ced80758200cf8f906ed741df306 to < c2fa91abf22a705cf02f886cd99cff41f4ceda60affected088186ded490ced80758200cf8f906ed741df306 to < f2167f10fcca68ab9ae3f8d94d2c704c5541ac69affected088186ded490ced80758200cf8f906ed741df306 to < d8939315b7342860df143afe0adda6212cdd3193affected088186ded490ced80758200cf8f906ed741df306 to < 698e682c849e356fb47a8be47ca8baa817cf31e0affected088186ded490ced80758200cf8f906ed741df306 to < 464d10e8d797454e16a173ef1292a446b2adf21caffected088186ded490ced80758200cf8f906ed741df306 to < ed2213bfb192ab51f09f12e9b49b5d482c6493f3affected
Linux Linux
Default version status: affected
2.6.16affected0 to < 2.6.16unaffected4.14.303 to ≤ 4.14.*unaffected4.19.270 to ≤ 4.19.*unaffected5.4.229 to ≤ 5.4.*unaffected5.10.163 to ≤ 5.10.*unaffected5.15.87 to ≤ 5.15.*unaffected6.0.17 to ≤ 6.0.*unaffected6.1.3 to ≤ 6.1.*unaffected6.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7 ↗
- https://git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e ↗
- https://git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60 ↗
- https://git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69 ↗
- https://git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193 ↗
- https://git.kernel.org/stable/c/698e682c849e356fb47a8be47ca8baa817cf31e0 ↗
- https://git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c ↗
- https://git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3 ↗