Mathieu Desnoyers f144e7c727 [POWERPC] Fix atomicity of TIF update in flush_thread() ...

Fix atomicity of TIF update in flush_thread() for powerpc

Fixes it correctly with *_ti_thread_flag.

Race :

parent process executing :
sys_ptrace()
 (lock_kernel())
 (ptrace_get_task_struct(pid))
 arch_ptrace()
   ptrace_detach()
     ptrace_disable(child);
       clear_singlestep(child);
         clear_tsk_thread_flag(child, TIF_SINGLESTEP);
         (which clears the TIF_SINGLESTEP flag atomically from a different
          process)
 (put_task_struct(child))
 (unlock_kernel())

And at the same time, in the child process :
sys_execve()
 do_execve()
   search_binary_handler()
     load_elf_binary()
       flush_old_exec()
         flush_thread()
           doing a non-atomic thread flag update

Applies on 2.6.20.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2007-03-16 16:37:28 +11:00

..

vdso32

[POWERPC] Support feature fixups in vdso's

2006-10-25 11:54:07 +10:00

vdso64

[POWERPC] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

align.c

[PATCH] powerpc: Implement support for setting little-endian mode via prctl

2006-06-09 21:24:15 +10:00

asm-offsets.c

[POWERPC] Fix manual assembly WARN_ON() in enter_rtas().

2007-01-09 17:03:02 +11:00

audit.c

[PATCH] audit: AUDIT_PERM support

2006-09-11 13:32:30 -04:00

binfmt_elf32.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

btext.c

[POWERPC] Use udbg_early_init() on ppc32

2007-02-14 11:55:16 +11:00

compat_audit.c

[PATCH] audit: AUDIT_PERM support

2006-09-11 13:32:30 -04:00

cpu_setup_6xx.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

cpu_setup_pa6t.S

[POWERPC] pasemi: Idle loops

2007-02-07 14:03:22 +11:00

cpu_setup_ppc970.S

[POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP

2006-10-16 16:32:25 +10:00

cputable.c

[POWERPC] No DEEPNAP on 970MP 1.0

2007-03-08 04:09:32 +11:00

crash_dump.c

[POWERPC] Make doc comments extractable

2006-08-08 17:07:04 +10:00

crash.c

[PATCH] Kexec / Kdump: Unify elf note code

2006-12-07 08:39:46 -08:00

dma_64.c

[POWERPC] Make direct DMA use node local allocations

2006-12-04 20:38:59 +11:00

entry_32.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

entry_64.S

[POWERPC] Clear RI bit in MSR before restoring r13 when returning to userspace

2007-02-07 14:03:23 +11:00

firmware.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

fpu.S

[POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S

2006-08-30 14:45:35 +10:00

head_4xx.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

head_8xx.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

head_32.S

[POWERPC] Remove the broken Gemini support

2007-01-24 21:13:58 +11:00

head_44x.S

[POWERPC] Remove ibm4{xx,4x}.h from arch/powerpc

2007-02-13 14:59:52 +11:00

head_64.S

[POWERPC] Fix performance monitor exception

2007-02-07 14:03:23 +11:00

head_booke.h

[PATCH] powerpc: Fix Kernel FP unavail exception for BookE

2006-02-10 16:51:50 +11:00

head_fsl_booke.S

[POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S

2007-02-13 16:13:27 -06:00

ibmebus.c

[POWERPC] Replace kmalloc+memset with kzalloc

2006-12-04 20:42:09 +11:00

idle_6xx.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

idle_power4.S

[POWERPC] Lazy interrupt disabling for 64-bit machines

2006-10-16 16:31:36 +10:00

idle.c

[PATCH] sysctl: remove insert_at_head from register_sysctl

2007-02-14 08:09:59 -08:00

init_task.c

[PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c

2006-10-02 07:57:20 -07:00

io.c

[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h

2006-12-04 20:39:05 +11:00

iomap.c

[POWERPC] Remove fastcall function attribute

2007-01-26 01:52:27 -06:00

iommu.c

[POWERPC] Refactor 64 bits DMA operations

2006-12-04 20:38:40 +11:00

irq.c

[PATCH] msi: sanely support hardware level msi disabling

2007-03-05 07:57:50 -08:00

kprobes.c

[POWERPC] Added kprobes support to ppc32

2007-02-06 22:55:19 -06:00

l2cr_6xx.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

legacy_serial.c

[POWERPC] Open Firmware serial port driver

2007-02-14 11:50:04 +11:00

lparcfg.c

[PATCH] mark struct file_operations const 2

2007-02-12 09:48:44 -08:00

lparmap.c

[PATCH] powerpc: Fix iSeries bug in VMALLOCBASE/VMALLOC_START consolidation

2006-01-09 15:06:06 +11:00

machine_kexec_32.c

Storage class should be first

2006-06-26 18:57:34 +02:00

machine_kexec_64.c

Merge branch 'merge'

2006-08-25 14:56:07 +10:00

machine_kexec.c

[POWERPC] Move some kexec logic into machine_kexec.c

2006-08-17 16:41:10 +10:00

Makefile

[POWERPC] pasemi: Idle loops

2007-02-07 14:03:22 +11:00

misc_32.S

[POWERPC] Consolidate feature fixup code

2006-10-25 11:42:10 +10:00

misc_64.S

[POWERPC] pasemi: UART udbg support

2007-02-07 14:03:22 +11:00

misc.S

[POWERPC] convert string i/o operations to C

2006-09-20 14:06:18 +10:00

module_32.c

[POWERPC] Add support for R_PPC_ADDR16_HI relocations

2007-01-24 21:13:58 +11:00

module_64.c

[POWERPC] Generic BUG for powerpc

2006-12-11 16:35:07 +11:00

nvram_64.c

[PATCH] mark struct file_operations const 2

2007-02-12 09:48:44 -08:00

of_device.c

[POWERPC] of_device_register: propagate device_create_file return code

2006-12-08 02:23:07 -06:00

of_platform.c

[POWERPC] powerpc: add scanning of ebc bus to of_platform

2006-12-19 15:35:40 +01:00

paca.c

[POWERPC] Implement SLB shadow buffer

2006-08-08 17:08:56 +10:00

pci_32.c

[POWERPC] Do not write virq back to PCI config space

2007-01-24 21:13:57 +11:00

pci_64.c

Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc

2007-02-08 10:04:20 -08:00

pci_dn.c

[POWERPC] Constify & voidify get_property()

2006-07-31 15:55:04 +10:00

pmc.c

[POWERPC] PA6T PMC support

2007-02-07 14:03:19 +11:00

ppc32.h

powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel

2005-11-03 16:03:28 +11:00

ppc_ksyms.c

[POWERPC] Compile fixes for arch/powerpc dcr code

2007-02-07 14:03:23 +11:00

proc_ppc64.c

[PATCH] mark struct file_operations const 2

2007-02-12 09:48:44 -08:00

process.c

[POWERPC] Fix atomicity of TIF update in flush_thread()

2007-03-16 16:37:28 +11:00

prom_init.c

[POWERPC] Add device tree fixups for the EFIKA

2007-02-13 15:35:53 +11:00

prom_parse.c

[POWERPC] Fix warning in prom_parse.c of_irq_map_oldworld()

2007-03-08 04:09:33 +11:00

prom.c

[POWERPC] Export of_find_property

2007-02-16 14:00:20 +11:00

ptrace32.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ptrace-common.h

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ptrace.c

[POWERPC] Mask 32-bit system call arguments to 32 bits on PPC64 in audit code

2007-01-24 21:13:58 +11:00

rtas_flash.c

[PATCH] mark struct file_operations const 2

2007-02-12 09:48:44 -08:00

rtas_pci.c

[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h

2006-12-04 20:39:05 +11:00

rtas-proc.c

[PATCH] mark struct file_operations const 2

2007-02-12 09:48:44 -08:00

rtas-rtc.c

[PATCH] powerpc: reorg RTAS delay code

2006-06-09 21:21:06 +10:00

rtas.c

Storage class should be before const qualifier

2007-02-17 20:11:19 +01:00

semaphore.c

powerpc: Merge enough to start building in arch/powerpc.

2005-09-26 16:04:21 +10:00

setup_32.c

[POWERPC] Use udbg_early_init() on ppc32

2007-02-14 11:55:16 +11:00

setup_64.c

[POWERPC] Distinguish POWER6 partition modes and tell userspace

2006-12-04 20:40:16 +11:00

setup-common.c

[POWERPC] Fix xmon=off and cleanup xmon initialisation

2006-10-04 14:52:22 +10:00

setup.h

[PATCH] powerpc: Make early xmon logic immune to location of early parsing

2006-05-19 15:02:12 +10:00

signal_32.c

[POWERPC] Fix register save area alignment for swapcontext syscall

2006-12-20 16:37:49 +11:00

signal_64.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

smp-tbsync.c

[POWERPC] Replace kmalloc+memset with kzalloc

2006-12-04 20:42:09 +11:00

smp.c

[POWERPC] Move MPIC smp routines into mpic.c

2007-02-14 11:50:04 +11:00

swsusp_32.S

[PATCH] Change the name of pagedir_nosave

2006-09-26 08:49:01 -07:00

sys_ppc32.c

[PATCH] Common compat_sys_sysinfo

2007-02-11 10:51:32 -08:00

syscalls.c

[PATCH] namespaces: utsname: switch to using uts namespaces

2006-10-02 07:57:21 -07:00

sysfs.c

[POWERPC] PA6T PMC support

2007-02-07 14:03:19 +11:00

systbl.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

tau_6xx.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

time.c

[POWERPC] iSeries: fix time.c for combined build

2006-12-04 20:39:15 +11:00

traps.c

backlight: Separate backlight properties from backlight ops pointers

2007-02-20 09:26:53 +00:00

udbg_16550.c

[PATCH] constant should be long

2007-03-14 15:27:50 -07:00

udbg.c

[POWERPC] Use udbg_early_init() on ppc32

2007-02-14 11:55:16 +11:00

vdso.c

[POWERPC] Fix vDSO page count calculation

2007-02-13 15:35:52 +11:00

vecemu.c

…

vector.S

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

vio.c

[POWERPC] arch/powerpc/kernel/vio.c of_node_put cleanup

2007-01-24 21:13:57 +11:00

vmlinux.lds.S

[PATCH] disable init/initramfs.c: architectures

2007-02-11 10:51:25 -08:00