Description
In the Linux kernel, the following vulnerability has been resolved: sparc: fix accurate exception reporting in copy_{from_to}_user for Niagara The referenced commit introduced exception handlers on user-space memory references in copy_from_user and copy_to_user. These handlers return from the respective function and calculate the remaining bytes left to copy using the current register contents. This commit fixes a couple of bad calculations and a broken epilogue in the exception handlers. This will prevent crashes and ensure correct return values of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.
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
7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 05440320ea3e249d5f984918f2bf51210c1a7c03affected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 7823fc4d8ab5e57f8db7806ff2530c03c166c4bbaffected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 37547d8e6eba87507279ee3dfddfd9dc46335454affected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < a365ee556e45f780ee322b349a06efdad0c1458faffected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 8cdeb5e482d3fdce7e825444b6ca3865e24c0228affected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < a90ce516a73dbe087f9bf3dbf311301a58d125c6affected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 088c5098ec6d6b0396edfbf3dad3e81de8469c1caffected7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e to < 0b67c8fc10b13a9090340c5f8a37d308f4e1571caffectedbfc8be6593097cb074d3912ba2f27565cfbb7d6eaffecteda15859f9d8396cce7c55ccdb7e75f70f14cbc349affected4.4.34 to < 4.5affected4.8.10 to < 4.9affected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected5.4.301 to ≤ 5.4.*unaffected5.10.246 to ≤ 5.10.*unaffected5.15.195 to ≤ 5.15.*unaffected6.1.156 to ≤ 6.1.*unaffected6.6.112 to ≤ 6.6.*unaffected6.12.53 to ≤ 6.12.*unaffected6.17.3 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03 ↗
- https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb ↗
- https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454 ↗
- https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f ↗
- https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228 ↗
- https://git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6 ↗
- https://git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c ↗
- https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c ↗