Re: [PATCH v4 2/2] mm/memory-failure: Poison read receives SIGKILL instead of SIGBUS if mmaped more than once

On Tue, Aug 6, 2019 at 10:28 AM Jane Chu wrote: > > Mmap /dev/dax more than once, then read the poison location using address > from one of the mappings. The other mappings due to not having the page > mapped in will cause SIGKILLs delivered to the process. SIGKILL succeeds > over SIGBUS, so user

[PATCH v4 2/2] mm/memory-failure: Poison read receives SIGKILL instead of SIGBUS if mmaped more than once

Mmap /dev/dax more than once, then read the poison location using address from one of the mappings. The other mappings due to not having the page mapped in will cause SIGKILLs delivered to the process. SIGKILL succeeds over SIGBUS, so user process looses the opportunity to handle the UE. Although