Description
In the Linux kernel, the following vulnerability has been resolved: s390/sclp: Fix SCCB present check Tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after physical to virtual address translation. If the kernel identity mapping does not start at address zero, the resulting virtual address is never zero, so that the NULL checks won't work. Subsequently this may result in incorrect accesses to the first page of the identity mapping. Fix this by introducing a function that handles the NULL case before address translation.
Product status
ada1da31ce34248bc97ca8f801f2cf6efa378a81 (git) before aa5073ac1a2a274812f3b04c278992e68ff67cc7
ada1da31ce34248bc97ca8f801f2cf6efa378a81 (git) before 86c2825791c3836a8f77a954b9c5ebe6fab410c5
ada1da31ce34248bc97ca8f801f2cf6efa378a81 (git) before 61605c847599fbfdfafe638607841c7d73719081
ada1da31ce34248bc97ca8f801f2cf6efa378a81 (git) before bf83ae3537359af088d6577812ed93113dfbcb7b
ada1da31ce34248bc97ca8f801f2cf6efa378a81 (git) before 430fa71027b6ac9bb0ce5532b8d0676777d4219a
5.16
Any version before 5.16
6.1.149 (semver)
6.6.103 (semver)
6.12.44 (semver)
6.16.4 (semver)
6.17 (original_commit_for_fix)
References
git.kernel.org/...c/aa5073ac1a2a274812f3b04c278992e68ff67cc7
git.kernel.org/...c/86c2825791c3836a8f77a954b9c5ebe6fab410c5
git.kernel.org/...c/61605c847599fbfdfafe638607841c7d73719081
git.kernel.org/...c/bf83ae3537359af088d6577812ed93113dfbcb7b
git.kernel.org/...c/430fa71027b6ac9bb0ce5532b8d0676777d4219a
