| Bug ID | 1162394 |
|---|---|
| Summary | SIGBUS when application writes to a DAX mapping |
| Classification | openSUSE |
| Product | openSUSE Distribution |
| Version | Leap 15.1 |
| Hardware | x86-64 |
| OS | Linux |
| Status | NEW |
| Severity | Normal |
| Priority | P5 - None |
| Component | Kernel |
| Assignee | kernel-maintainers@forge.provo.novell.com |
| Reporter | marcin.slusarz@intel.com |
| QA Contact | qa-bugs@suse.de |
| Found By | --- |
| Blocker | --- |
Created attachment 828844 [details] Minimal reproducer When application maps a file without MAP_SYNC, modifies it, unmaps it, maps it again with MAP_SYNC, reads something from the mapping, then the next write generates SIGBUS. Minimal reproducer attached. $ ./sigbus_repro /mnt/pmem/file 4096 truncating /mnt/pmem/file to 4096 opening /mnt/pmem/file Bus error (core dumped) This bug was discovered by PMDK test and reported here: https://github.com/pmem/pmdk/issues/4527