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Linus Torvalds d7824370e2 mm: fix up some user-visible effects of the stack guard page ... This commit makes the stack guard page somewhat less visible to user space. It does this by: - not showing the guard page in /proc/<pid>/maps It looks like lvm-tools will actually read /proc/self/maps to figure out where all its mappings are, and effectively do a specialized "mlockall()" in user space. By not showing the guard page as part of the mapping (by just adding PAGE_SIZE to the start for grows-up pages), lvm-tools ends up not being aware of it. - by also teaching the _real_ mlock() functionality not to try to lock the guard page. That would just expand the mapping down to create a new guard page, so there really is no point in trying to lock it in place. It would perhaps be nice to show the guard page specially in /proc/<pid>/maps (or at least mark grow-down segments some way), but let's not open ourselves up to more breakage by user space from programs that depends on the exact deails of the 'maps' file. Special thanks to Henrique de Moraes Holschuh for diving into lvm-tools source code to see what was going on with the whole new warning. Reported-and-tested-by: François Valenduc <francois.valenduc@tvcablenet.be Reported-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		15 years ago
..
Kconfig	…
Makefile	procfs: simplify conditional processing of fs/proc.o.	15 years ago
array.c	CRED: Fix get_task_cred() and task_state() to not resurrect dead credentials	15 years ago
base.c	vfs: show unreachable paths in getcwd and proc	15 years ago
cmdline.c	…
cpuinfo.c	…
devices.c	…
generic.c	remove inode_setattr	15 years ago
inode.c	bkl: Remove locked .ioctl file operation	15 years ago
internal.h	proc: rename de_get() to pde_get() and inline it	15 years ago
interrupts.c	…
kcore.c	kcore: add _text to KCORE_TEXT	15 years ago
kmsg.c	procfs: Use generic_file_llseek in /proc/kmsg	15 years ago
loadavg.c	…
meminfo.c	hwpoison: fix/proc/meminfo alignment	15 years ago
mmu.c	…
nommu.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
page.c	mm: export stable page flags	15 years ago
proc_devtree.c	of: Drop properties with "/" in their name	15 years ago
proc_net.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
proc_sysctl.c	remove inode_setattr	15 years ago
proc_tty.c	…
root.c	proc: cleanup: remove unused assignments	15 years ago
softirqs.c	proc: export statistics for softirq to /proc	16 years ago
stat.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
task_mmu.c	mm: fix up some user-visible effects of the stack guard page	15 years ago
task_nommu.c	nommu: add '[stack]' label to /proc/pid/maps output	15 years ago
uptime.c	[PATCH] Fix idle time field in /proc/uptime	16 years ago
version.c	…
vmcore.c	Merge branch 'bkl/procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing	15 years ago