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Eric W. Biederman e71b4e061c ptrace: Don't allow accessing an undumpable mm ... commit 84d77d3f06 upstream. It is the reasonable expectation that if an executable file is not readable there will be no way for a user without special privileges to read the file. This is enforced in ptrace_attach but if ptrace is already attached before exec there is no enforcement for read-only executables. As the only way to read such an mm is through access_process_vm spin a variant called ptrace_access_vm that will fail if the target process is not being ptraced by the current process, or the current process did not have sufficient privileges when ptracing began to read the target processes mm. In the ptrace implementations replace access_process_vm by ptrace_access_vm. There remain several ptrace sites that still use access_process_vm as they are reading the target executables instructions (for kernel consumption) or register stacks. As such it does not appear necessary to add a permission check to those calls. This bug has always existed in Linux. Fixes: v1.0 Reported-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		6 years ago
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configs	[IA64] refresh arch/ia64/configs/* using "make savedefconfig"	9 years ago
dig	…
hp	[kbuild] handle exports in lib-y objects reliably	7 years ago
include	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	7 years ago
kernel	ptrace: Don't allow accessing an undumpable mm	6 years ago
lib	ia64: move exports to definitions	7 years ago
mm	mm: do not pass mm_struct into handle_mm_fault	7 years ago
oprofile	…
pci	PCI: Set ROM shadow location in arch code, not in PCI core	7 years ago
scripts	ia64: remove paravirt code	8 years ago
sn	dma-mapping: use unsigned long for dma_attrs	7 years ago
uv	…
Kconfig	Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user	7 years ago
Kconfig.debug	…
Makefile	kbuild: drop redundant "PHONY += FORCE"	7 years ago
install.sh	…
module.lds	…