Linus Torvalds f91962f90e [PATCH] 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>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2006-05-20 15:00:33 -07:00

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irq

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power

[PATCH] Fix suspend with traced tasks

2006-04-17 13:16:06 -07:00

.gitignore

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acct.c

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audit.c

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auditsc.c

[PATCH] make vm86 call audit_syscall_exit

2006-05-01 12:03:42 -07:00

capability.c

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compat.c

[PATCH] remove bogus asm/bug.h includes.

2006-02-07 20:56:35 -05:00

configs.c

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cpu.c

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cpuset.c

[PATCH] cpuset: oops in exit on null cpuset fix

2006-02-15 15:32:21 -08:00

dma.c

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exec_domain.c

[PATCH] Fix module refcount leak in __set_personality()

2006-04-07 09:44:29 -07:00

exit.c

[PATCH] kjournald keeps reference to namespace

2006-02-20 20:27:38 -08:00

extable.c

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fork.c

[PATCH] wrong error path in dup_fd() leading to oopses in RCU

2006-04-07 09:44:28 -07:00

futex.c

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hrtimer.c

[PATCH] fix next_timer_interrupt() for hrtimer

2006-03-06 18:40:44 -08:00

intermodule.c

[PATCH] missing license tag in intermodule

2006-02-05 11:06:52 -08:00

itimer.c

[PATCH] hrtimers: fix oldvalue return in setitimer

2006-02-01 08:53:12 -08:00

kallsyms.c

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Kconfig.hz

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Kconfig.preempt

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kexec.c

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kfifo.c

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kmod.c

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kprobes.c

[PATCH] Kprobes: Fix deadlock in function-return probes

2006-02-03 08:32:00 -08:00

ksysfs.c

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kthread.c

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Makefile

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module.c

[PATCH] module: strlen_user() race fix

2006-02-07 16:12:32 -08:00

mutex-debug.c

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mutex-debug.h

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mutex.c

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mutex.h

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panic.c

[PATCH] prevent recursive panic from softlockup watchdog

2006-02-10 08:13:12 -08:00

params.c

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pid.c

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posix-cpu-timers.c

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posix-timers.c

[PATCH] posix-timers: fix requeue accounting when signal is ignored

2006-03-17 07:51:25 -08:00

printk.c

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profile.c

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ptrace.c

[PATCH] ptrace_attach: fix possible deadlock schenario with irqs

2006-05-20 15:00:33 -07:00

rcupdate.c

[PATCH] rcu batch tuning

2006-03-08 14:14:01 -08:00

rcutorture.c

[PATCH] rcu_torture_lock deadlock fix

2006-01-31 11:30:18 -08:00

resource.c

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sched.c

[PATCH] fix scheduler deadlock

2006-03-27 22:47:31 -08:00

seccomp.c

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signal.c

[PATCH] fix non-leader exec under ptrace

2006-04-17 13:16:06 -07:00

softirq.c

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softlockup.c

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spinlock.c

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stop_machine.c

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sys_ni.c

[PATCH] Fix compile for CONFIG_SYSVIPC=n or CONFIG_SYSCTL=n

2006-02-20 20:00:11 -08:00

sys.c

[PATCH] RLIMIT_CPU: fix handling of a zero limit

2006-04-17 13:16:06 -07:00

sysctl.c

[PATCH] fix file counting

2006-03-08 14:14:01 -08:00

time.c

[PATCH] Normalize timespec for negative values in ns_to_timespec

2006-02-03 08:32:06 -08:00

timer.c

[PATCH] time_interpolator: add __read_mostly

2006-03-17 07:51:25 -08:00

uid16.c

[PATCH] Add more prevent_tail_call()

2006-04-24 09:56:05 -07:00

user.c

[PATCH] "Fix uidhash_lock <-> RXU deadlock" fix

2006-01-31 16:49:43 -08:00

wait.c

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workqueue.c

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