Description
In the Linux kernel, the following vulnerability has been resolved: ftrace: Do not blindly read the ip address in ftrace_bug() It was reported that a bug on arm64 caused a bad ip address to be used for updating into a nop in ftrace_init(), but the error path (rightfully) returned -EINVAL and not -EFAULT, as the bug caused more than one error to occur. But because -EINVAL was returned, the ftrace_bug() tried to report what was at the location of the ip address, and read it directly. This caused the machine to panic, as the ip was not pointing to a valid memory address. Instead, read the ip address with copy_from_kernel_nofault() to safely access the memory, and if it faults, report that the address faulted, otherwise report what was in that location.
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
05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 0bc62e398bbd9e600959e610def5109957437b28affected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 4aedc2bc2b32c93555f47c95610efb89cc1ec09baffected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < acf671ba79c1feccc3ec7cfdcffead4efcec49e7affected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 862dcc14f2803c556bdd73b43c27b023fafce2fbaffected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 7e4e824b109f1d41ccf223fbb0565d877d6223a2affected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 97524384762c1fb9b3ded931498dd2047bd0de81affected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 3e4ddeb68751fb4fb657199aed9cfd5d02796875affected05736a427f7e16be948ccbf39782bd3a6ae16b14 to < 6c14133d2d3f768e0a35128faac8aa6ed4815051affected
Linux Linux
Default version status: affected
2.6.28affected0 to < 2.6.28unaffected4.4.273 to ≤ 4.4.*unaffected4.9.273 to ≤ 4.9.*unaffected4.14.237 to ≤ 4.14.*unaffected4.19.195 to ≤ 4.19.*unaffected5.4.126 to ≤ 5.4.*unaffected5.10.44 to ≤ 5.10.*unaffected5.12.11 to ≤ 5.12.*unaffected5.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28 ↗
- https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b ↗
- https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7 ↗
- https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb ↗
- https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2 ↗
- https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81 ↗
- https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875 ↗
- https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051 ↗