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android_kernel_sony_sdm845/arch/alpha/kernel
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Eric W. Biederman e71b4e061c ptrace: Don't allow accessing an undumpable mm 
commit 84d77d3f06e7e8dea057d10e8ec77ad71f721be3 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>
2017-01-06 10:40:13 +01:00
..
.gitignore alpha: .gitignore vmlinux.lds 2009-01-15 16:39:40 -08:00
asm-offsets.c
audit.c alpha: Enable system-call auditing support. 2014-01-31 09:21:55 -08:00
binfmt_loader.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
console.c TTY:vt: convert remain take_over_console's users to do_take_over_console 2013-05-20 22:29:27 -07:00
core_apecs.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_cia.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_irongate.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
core_lca.c Fix common misspellings 2011-03-31 11:26:23 -03:00
core_marvel.c char/genrtc: remove alpha support 2016-06-04 00:23:02 +02:00
core_mcpcia.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
core_polaris.c
core_t2.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_titan.c arch/alpha/kernel: Add kmalloc NULL tests 2009-11-30 15:38:19 -05:00
core_tsunami.c alpha: include module.h to fix modpost on Tsunami 2012-05-02 15:54:06 -04:00
core_wildfire.c
entry.S alpha: Enable system-call auditing support. 2014-01-31 09:21:55 -08:00
err_common.c
err_ev6.c alpha: delete non-required instances of <linux/init.h> 2015-05-26 10:01:48 -07:00
err_ev7.c alpha: titan and marvel build fixes 2009-05-02 15:36:10 -07:00
err_impl.h Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
err_marvel.c Fix common misspellings 2011-03-31 11:26:23 -03:00
err_titan.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
es1888.c
gct.c
head.S Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
io.c
irq.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
irq_alpha.c alpha: Use qemu+cserve provided high-res clock and alarm. 2013-11-16 16:33:21 -08:00
irq_i8259.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
irq_impl.h alpha: i8259, alcor, jensen wildfire: Convert irq_chip 2011-03-02 14:57:55 -05:00
irq_pyxis.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
irq_srm.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
machvec_impl.h alpha: move exports to actual definitions 2016-08-07 23:47:18 -04:00
Makefile alpha: move exports to actual definitions 2016-08-07 23:47:18 -04:00
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
osf_sys.c give readdir(2)/getdents(2)/etc. uniform exclusion with lseek() 2016-05-02 19:49:28 -04:00
pc873xx.c alpha: Detect Super IO chip, no IDE on Avanti, enable EPP19 2010-06-15 14:19:08 -04:00
pc873xx.h alpha: Detect Super IO chip, no IDE on Avanti, enable EPP19 2010-06-15 14:19:08 -04:00
pci-noop.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
pci-sysfs.c alpha/PCI: Call iomem_is_exclusive() for IORESOURCE_MEM, but not IORESOURCE_IO 2016-04-25 15:59:50 -05:00
pci.c PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code" 2015-09-15 13:18:04 -05:00
pci_impl.h alpha/PCI: replace pci_probe_only with pci_flags 2012-02-23 20:18:56 -07:00
pci_iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
perf_event.c alpha: Replace __get_cpu_var 2014-08-26 13:45:53 -04:00
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
proto.h alpha: Use qemu+cserve provided high-res clock and alarm. 2013-11-16 16:33:21 -08:00
ptrace.c ptrace: Don't allow accessing an undumpable mm 2017-01-06 10:40:13 +01:00
rtc.c rtc: cmos: move mc146818rtc code out of asm-generic/rtc.h 2016-06-04 00:20:00 +02:00
setup.c alpha: move exports to actual definitions 2016-08-07 23:47:18 -04:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
smc37c93x.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
smc37c669.c alpha: remove mysterious if zero-ed out includes 2012-07-30 17:25:11 -07:00
smp.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
srm_env.c srm_env: don't bother with pointer to srm_env_t 2013-04-09 14:13:33 -04:00
srmcons.c alpha: don't use module_init for non-modular core code 2015-05-26 10:01:47 -07:00
sys_alcor.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_cabriolet.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_dp264.c alpha: Don't if-out dp264_device_interrupt. 2013-07-19 13:54:26 -07:00
sys_eb64p.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_eiger.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
sys_jensen.c alpha: Reorganize rtc handling 2013-11-16 16:33:16 -08:00
sys_marvel.c alpha: clean up unnecessary MSI/MSI-X capability find 2015-05-26 10:01:44 -07:00
sys_miata.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_mikasa.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_nautilus.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
sys_noritake.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_rawhide.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_ruffian.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_rx164.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sable.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sio.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sx164.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_takara.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_titan.c alpha: irq: remove deprecated use of IRQF_DISABLED 2013-04-07 12:59:30 -07:00
sys_wildfire.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
systbls.S alpha: Wire up all missing implemented syscalls 2015-05-26 10:01:50 -07:00
time.c alpha/time: Migrate to new 'set-state' interface 2015-08-10 11:40:58 +02:00
traps.c alpha: delete non-required instances of <linux/init.h> 2015-05-26 10:01:48 -07:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00