Linus Torvalds f358166a94 ptrace_attach: fix possible deadlock schenario with irqs ... Eric Biederman points out that we can't take the task_lock while holding tasklist_lock for writing, because another CPU that holds the task lock might take an interrupt that then tries to take tasklist_lock for writing. Which would be a nasty deadlock, with one CPU spinning forever in an interrupt handler (although admittedly you need to really work at triggering it ;) Since the ptrace_attach() code is special and very unusual, just make it be extra careful, and use trylock+repeat to avoid the possible deadlock. Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-05-11 11:08:49 -07:00
..
irq	[PATCH] request_irq(): remove warnings from irq probing	2006-04-28 08:33:46 -07:00
power	[PATCH] off-by-1 in kernel/power/main.c	2006-04-28 08:33:46 -07:00
.gitignore
acct.c
audit.c	[PATCH] More user space subject labels	2006-05-01 06:10:01 -04:00
audit.h	[PATCH] support for context based audit filtering, part 2	2006-05-01 06:09:36 -04:00
auditfilter.c	[PATCH] More user space subject labels	2006-05-01 06:10:01 -04:00
auditsc.c	[PATCH] Audit Filter Performance	2006-05-01 06:10:07 -04:00
capability.c
compat.c
configs.c
cpu.c
cpuset.c
dma.c
exec_domain.c
exit.c	[PATCH] move call of audit_free() into do_exit()	2006-05-01 06:06:13 -04:00
extable.c
fork.c	[PATCH] move call of audit_free() into do_exit()	2006-05-01 06:06:13 -04:00
futex_compat.c	[PATCH] futex: check and validate timevals	2006-03-31 12:18:59 -08:00
futex.c	[PATCH] futex: check and validate timevals	2006-03-31 12:18:59 -08:00
hrtimer.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
intermodule.c
itimer.c
kallsyms.c
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c
kmod.c
kprobes.c	[PATCH] kprobes: NULL out non-relevant fields in struct kretprobe	2006-04-20 07:54:03 -07:00
ksysfs.c
kthread.c
Makefile
module.c
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
panic.c	[PATCH] the scheduled unexport of panic_timeout	2006-04-11 06:18:40 -07:00
params.c
pid.c	[PATCH] pidhash: Refactor the pid hash table	2006-03-31 12:19:00 -08:00
posix-cpu-timers.c
posix-timers.c
printk.c	BUG_ON() Conversion in kernel/printk.c	2006-04-01 01:21:17 +02:00
profile.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
ptrace.c	ptrace_attach: fix possible deadlock schenario with irqs	2006-05-11 11:08:49 -07:00
rcupdate.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
rcutorture.c
relay.c
resource.c
sched.c	[PATCH] Remove __devinitdata from notifier block definitions	2006-04-26 08:27:50 -07:00
seccomp.c
signal.c	[PATCH] fix non-leader exec under ptrace	2006-04-14 08:59:13 -07:00
softirq.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
softlockup.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
spinlock.c
stop_machine.c
sys_ni.c	[PATCH] frv: define MMU mode specific syscalls as 'cond_syscall' and clean up unneeded macros	2006-04-11 06:18:33 -07:00
sys.c	[PATCH] Make setsid() more robust	2006-03-31 12:18:59 -08:00
sysctl.c
time.c	Fix comments: s/granuality/granularity/	2006-04-01 01:41:22 +02:00
timer.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00
uid16.c	[PATCH] Add more prevent_tail_call()	2006-04-19 16:27:18 -07:00
user.c
wait.c
workqueue.c	[PATCH] Remove __devinit and __cpuinit from notifier_call definitions	2006-04-26 08:30:03 -07:00