Messages in this thread Patch in this message | | | Date | Tue, 14 Jan 2003 09:25:41 +0100 (CET) | From | fcorneli@elis ... | Subject | [PATCH] ptrace, kernel 2.5.56 |
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Hi,
According to Documentation/cachetlb.txt flush_dcache_page should also be called when the kernel _is about_ to read from a page and user space shared&writable mappings of this page potentially exist. I think kernel/ptrace.c should be fixed on this issue. I already posted this patch on the lkml a few months ago, but it got lost I guess. Where should I send ptrace patches to in the future? Anyone out there who maintains the ptrace stuff?
Frank.
--- ptrace.c.2.5.56 2003-01-13 14:31:45.000000000 +0100 +++ ptrace.c 2003-01-13 14:32:43.000000000 +0100 @@ -182,11 +182,11 @@ maddr = kmap(page); if (write) { memcpy(maddr + offset, buf, bytes); - flush_page_to_ram(page); + flush_dcache_page(page); flush_icache_user_range(vma, page, addr, bytes); } else { + flush_dcache_page(page); memcpy(buf, maddr + offset, bytes); - flush_page_to_ram(page); } kunmap(page); page_cache_release(page);
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