diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2024-09-29 18:20:47 +0200 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2024-09-30 08:19:11 +0900 |
| commit | 34820304cc2cd1804ee1f8f3504ec77813d29c8e (patch) | |
| tree | a07b6e098d903343551b7f8d2e978ff2bf5efbe5 /Documentation/filesystems | |
| parent | ad46e8f95e931e113cb98253daf6d443ac244cde (diff) | |
uprobes: fix kernel info leak via "[uprobes]" vma
xol_add_vma() maps the uninitialized page allocated by __create_xol_area()
into userspace. On some architectures (x86) this memory is readable even
without VM_READ, VM_EXEC results in the same pgprot_t as VM_EXEC|VM_READ,
although this doesn't really matter, debugger can read this memory anyway.
Link: https://lore.kernel.org/all/20240929162047.GA12611@redhat.com/
Reported-by: Will Deacon <will@kernel.org>
Fixes: d4b3b6384f98 ("uprobes/core: Allocate XOL slots for uprobes use")
Cc: stable@vger.kernel.org
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'Documentation/filesystems')
0 files changed, 0 insertions, 0 deletions