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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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0833422274
By default, non-privileged tasks can only mlock() a small amount of memory to avoid a DoS attack by ordinary users. The Linux kernel defaulted to 32k (on a 4k page size system) to accommodate the needs of gpg. However, newer gpg2 needs 64k in various circumstances and otherwise fails miserably, see bnc#329675. Change the default to 64k, and make it more agnostic to PAGE_SIZE. Signed-off-by: Kurt Garloff <garloff@suse.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
#ifndef _LINUX_RESOURCE_H
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#define _LINUX_RESOURCE_H
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#include <linux/time.h>
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struct task_struct;
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/*
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* Resource control/accounting header file for linux
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*/
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/*
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* Definition of struct rusage taken from BSD 4.3 Reno
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*
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* We don't support all of these yet, but we might as well have them....
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* Otherwise, each time we add new items, programs which depend on this
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* structure will lose. This reduces the chances of that happening.
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*/
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#define RUSAGE_SELF 0
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#define RUSAGE_CHILDREN (-1)
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#define RUSAGE_BOTH (-2) /* sys_wait4() uses this */
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#define RUSAGE_THREAD 1 /* only the calling thread */
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struct rusage {
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struct timeval ru_utime; /* user time used */
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struct timeval ru_stime; /* system time used */
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long ru_maxrss; /* maximum resident set size */
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long ru_ixrss; /* integral shared memory size */
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long ru_idrss; /* integral unshared data size */
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long ru_isrss; /* integral unshared stack size */
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long ru_minflt; /* page reclaims */
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long ru_majflt; /* page faults */
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long ru_nswap; /* swaps */
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long ru_inblock; /* block input operations */
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long ru_oublock; /* block output operations */
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long ru_msgsnd; /* messages sent */
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long ru_msgrcv; /* messages received */
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long ru_nsignals; /* signals received */
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long ru_nvcsw; /* voluntary context switches */
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long ru_nivcsw; /* involuntary " */
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};
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struct rlimit {
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unsigned long rlim_cur;
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unsigned long rlim_max;
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};
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#define PRIO_MIN (-20)
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#define PRIO_MAX 20
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#define PRIO_PROCESS 0
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#define PRIO_PGRP 1
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#define PRIO_USER 2
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/*
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* Limit the stack by to some sane default: root can always
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* increase this limit if needed.. 8MB seems reasonable.
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*/
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#define _STK_LIM (8*1024*1024)
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/*
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* GPG2 wants 64kB of mlocked memory, to make sure pass phrases
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* and other sensitive information are never written to disk.
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*/
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#define MLOCK_LIMIT ((PAGE_SIZE > 64*1024) ? PAGE_SIZE : 64*1024)
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/*
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* Due to binary compatibility, the actual resource numbers
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* may be different for different linux versions..
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*/
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#include <asm/resource.h>
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int getrusage(struct task_struct *p, int who, struct rusage __user *ru);
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#endif
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