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c0a79b229a
linux/arch/sparc64/kernel
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Mathieu Desnoyers c0a79b229a [SPARC64]: Fix atomicity of TIF update in flush_thread() 
Fix atomicity of TIF update in flush_thread() for sparc64

Fixes correctly the race by using *_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

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-10 00:19:49 -08:00
..
asm-offsets.c kbuild: frv,m32r,sparc64 introduce fake asm-offsets.h file 2005-09-09 22:47:53 +02:00
audit.c [PATCH] sparc64 audit syscall classes hookup 2006-09-12 03:05:05 -04:00
auxio.c Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
binfmt_aout32.c [PATCH] struct path: convert sparc64 2006-12-08 08:28:50 -08:00
binfmt_elf32.c [PATCH] elf: Always define elf_addr_t in linux/elf.h 2006-12-07 08:39:38 -08:00
central.c [SPARC64]: Fix central/FHC bus handling on Ex000 systems. 2006-10-25 22:39:15 -07:00
chmc.c [SPARC64]: Replace kmalloc+memset with kzalloc 2006-12-10 02:40:18 -08:00
compat_audit.c [PATCH] sparc64 audit syscall classes hookup 2006-09-12 03:05:05 -04:00
cpu.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
devices.c [SPARC]: Simplify and correct __cpu_find_by() 2006-07-21 14:18:15 -07:00
dtlb_miss.S [SPARC64]: More TLB/TSB handling fixes. 2006-03-20 01:13:34 -08:00
dtlb_prot.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
ebus.c [SPARC]: Fix bus_id[] string overflow. 2006-10-27 01:03:31 -07:00
entry.S [SPARC64]: Add irqtrace/stacktrace/lockdep support. 2006-12-10 02:39:09 -08:00
etrap.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head.S [SPARC64]: Kill no-remapping-needed code in head.S 2006-12-17 14:06:55 -08:00
idprom.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
iommu_common.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iommu_common.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.c [SPARC64]: virt_irq_free only needed when CONFIG_PCI_MSI 2007-02-26 11:35:46 -08:00
isa.c [SPARC64]: Handle ISA devices with no 'regs' property. 2006-12-31 14:06:07 -08:00
itlb_miss.S [SPARC64]: Fix _PAGE_EXEC handling. 2006-03-20 01:14:13 -08:00
kprobes.c [SPARC64]: Fix several kprobes bugs. 2006-12-10 02:42:03 -08:00
ktlb.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
Makefile [SPARC64]: Add irqtrace/stacktrace/lockdep support. 2006-12-10 02:39:09 -08:00
module.c [SPARC]: Handle UNWIND_INFO properly. 2006-05-12 12:45:50 -07:00
of_device.c [SPARC]: Handle unresolvable resources better in of_device.c 2007-03-02 15:22:50 -08:00
pci_common.c [SPARC64]: Add obppath sysfs attribute for SBUS and PCI devices. 2007-02-10 23:50:35 -08:00
pci_impl.h [SPARC64]: Convert sparc64 PCI layer to in-kernel device tree. 2006-06-23 23:15:26 -07:00
pci_iommu.c [SPARC64]: Fix memory corruption in pci_4u_free_consistent(). 2006-10-25 22:39:16 -07:00
pci_psycho.c [PATCH] sparc64 pt_regs fixes 2006-10-08 12:32:35 -07:00
pci_sabre.c [SPARC64]: Compute dma_end argument to sabre_pbm_init() correctly. 2006-10-19 17:20:30 -07:00
pci_schizo.c [PATCH] sparc64 pt_regs fixes 2006-10-08 12:32:35 -07:00
pci_sun4v_asm.S [SPARC64]: Add PCI MSI support on Niagara. 2007-02-10 23:50:37 -08:00
pci_sun4v.c [SPARC64]: Add PCI MSI support on Niagara. 2007-02-10 23:50:37 -08:00
pci_sun4v.h [SPARC64]: Add PCI MSI support on Niagara. 2007-02-10 23:50:37 -08:00
pci.c [SPARC]: Provide pci_device_to_OF_node() just like powerpc. 2007-03-02 15:22:51 -08:00
power.c [PATCH] sparc64 pt_regs fixes 2006-10-08 12:32:35 -07:00
process.c [SPARC64]: Fix atomicity of TIF update in flush_thread() 2007-03-10 00:19:49 -08:00
prom.c [SPARC64]: Fix Tomatillo/Schizo IRQ handling. 2006-10-30 19:33:33 -08:00
ptrace.c [SPARC{32,64}]: Propagate ptrace_traceme() return value. 2006-12-10 02:40:27 -08:00
rtrap.S [SPARC64]: Add irqtrace/stacktrace/lockdep support. 2006-12-10 02:39:09 -08:00
sbus.c [PATCH] sparc64 pt_regs fixes 2006-10-08 12:32:35 -07:00
semaphore.c [SPARC64]: Avoid membar instructions in delay slots. 2005-06-27 15:42:04 -07:00
setup.c [PATCH] Dynamic kernel command-line: sparc64 2007-02-12 09:48:39 -08:00
signal32.c [SPARC64]: Move signal compat bits to new header file. 2006-10-02 14:24:18 -07:00
signal.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
smp.c [PATCH] Change cpu_up and co from __devinit to __cpuinit 2007-01-11 18:18:20 -08:00
sparc64_ksyms.c [SPARC]: Re-export saved_command_line to modules. 2007-02-12 15:15:48 -08:00
stacktrace.c [SPARC64]: Add irqtrace/stacktrace/lockdep support. 2006-12-10 02:39:09 -08:00
starfire.c [SPARC64]: Kill starfire_cookie from SBUS/PCI. 2006-06-29 16:37:08 -07:00
sun4v_ivec.S [SPARC64]: Add irqtrace/stacktrace/lockdep support. 2006-12-10 02:39:09 -08:00
sun4v_tlb_miss.S [SPARC64]: Set g4/g5 properly in sun4v dtlb-prot handling. 2007-01-26 18:56:01 -08:00
sunos_ioctl32.c [PATCH] consolidate line discipline number definitions 2007-02-11 10:51:26 -08:00
sys32.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
sys_sparc32.c [PATCH] Common compat_sys_sysinfo 2007-02-11 10:51:32 -08:00
sys_sparc.c [PATCH] provide kernel_execve on all architectures 2006-10-02 07:57:23 -07:00
sys_sunos32.c [PATCH] signal: use kill_pgrp not kill_pg in the sunos compatibility code 2007-02-12 09:48:31 -08:00
systbls.S [PATCH] Common compat_sys_sysinfo 2007-02-11 10:51:32 -08:00
time.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
trampoline.S [SPARC64]: Get SUN4V SMP working. 2006-03-20 01:13:22 -08:00
traps.c [SPARC64]: Run ctrl-alt-del action for sun4v powerdown request. 2006-12-10 02:39:51 -08:00
tsb.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ttable.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
una_asm.S [SPARC64]: Mark __ex_table section correctly. 2006-03-04 23:23:56 -08:00
unaligned.c [SPARC64]: Unaligned accesses to userspace are hard errors. 2006-12-10 02:39:39 -08:00
us2e_cpufreq.c [SPARC64]: kzalloc() conversion 2006-03-20 01:14:19 -08:00
us3_cpufreq.c [SPARC64]: kzalloc() conversion 2006-03-20 01:14:19 -08:00
visemul.c [SPARC64]: Call do_mathemu on illegal instruction traps too. 2006-12-10 02:39:32 -08:00
vmlinux.lds.S [PATCH] disable init/initramfs.c: architectures 2007-02-11 10:51:25 -08:00
winfixup.S [SPARC64]: Fix unaligned access winfxup handling on SUN4V. 2006-03-20 01:13:39 -08:00