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Oleg Nesterov 34820304cc 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: 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>
2024-09-30 08:19:11 +09:00
..
callchain.c sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
core.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
hw_breakpoint_test.c perf/hw_breakpoint: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
hw_breakpoint.c perf/hw_breakpoint: Remove arch breakpoint hooks 2023-08-16 23:54:50 +10:00
internal.h perf/aux: Fix AUX buffer serialization 2024-09-04 18:22:56 +02:00
Makefile
ring_buffer.c perf/aux: Fix AUX buffer serialization 2024-09-04 18:22:56 +02:00
uprobes.c uprobes: fix kernel info leak via "[uprobes]" vma 2024-09-30 08:19:11 +09:00