OpenCloudOS-Kernel/kernel/events
Oleg Nesterov 5b981d8335 uprobes: fix kernel info leak via "[uprobes]" vma
commit 34820304cc2cd1804ee1f8f3504ec77813d29c8e upstream.

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: d4b3b6384f ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-10-10 11:58:02 +02:00
..
Makefile perf/hw_breakpoint: Add KUnit test for constraints accounting 2022-08-30 10:56:20 +02:00
callchain.c uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
core.c perf/core: Fix small negative period being ignored 2024-10-10 11:57:45 +02:00
hw_breakpoint.c perf/hw_breakpoint: Remove arch breakpoint hooks 2023-08-16 23:54:50 +10:00
hw_breakpoint_test.c perf/hw_breakpoint: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
internal.h perf/aux: Fix AUX buffer serialization 2024-09-12 11:11:42 +02:00
ring_buffer.c perf/aux: Fix AUX buffer serialization 2024-09-12 11:11:42 +02:00
uprobes.c uprobes: fix kernel info leak via "[uprobes]" vma 2024-10-10 11:58:02 +02:00