Author: jhibbits Date: Sat Jul 13 00:19:57 2019 New Revision: 349960 URL: https://svnweb.freebsd.org/changeset/base/349960
Log: Set pcpu curpmap for powerpc64 Summary: If an illegal instruction is encountered on a process running on a powerpc64 kernel it would attempt to sync the cache before retrying the instruction "just in case". However, since curpmap is not set, when moea64_sync_icache() attempts to lock the pmap, it's locking on a NULL pointer, triggering a panic. Fix this by adding a (assumed unnecessary) fallback to curthread's pmap in moea64_sync_icache(). Reported by: alfredo.junior_eldorado.org.br Reviewed by: luporl, alfredo.junior_eldorado.org.br Differential Revision: https://reviews.freebsd.org/D20911 Modified: head/sys/powerpc/aim/mmu_oea64.c Modified: head/sys/powerpc/aim/mmu_oea64.c ============================================================================== --- head/sys/powerpc/aim/mmu_oea64.c Sat Jul 13 00:12:35 2019 (r349959) +++ head/sys/powerpc/aim/mmu_oea64.c Sat Jul 13 00:19:57 2019 (r349960) @@ -2838,6 +2838,9 @@ moea64_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t v vm_paddr_t pa; vm_size_t len; + if (__predict_false(pm == NULL)) + pm = &curthread->td_proc->p_vmspace->vm_pmap; + PMAP_LOCK(pm); while (sz > 0) { lim = round_page(va+1); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
