Linus Torvalds e268337dfe proc: clean up and fix /proc/<pid>/mem handling ... Jüri Aedla reported that the /proc/<pid>/mem handling really isn't very robust, and it also doesn't match the permission checking of any of the other related files. This changes it to do the permission checks at open time, and instead of tracking the process, it tracks the VM at the time of the open. That simplifies the code a lot, but does mean that if you hold the file descriptor open over an execve(), you'll continue to read from the _old_ VM. That is different from our previous behavior, but much simpler. If somebody actually finds a load where this matters, we'll need to revert this commit. I suspect that nobody will ever notice - because the process mapping addresses will also have changed as part of the execve. So you cannot actually usefully access the fd across a VM change simply because all the offsets for IO would have changed too. Reported-by: Jüri Aedla <asd@ut.ee> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-01-17 15:21:19 -08:00
..
array.c	Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security	2012-01-14 18:36:33 -08:00
base.c	proc: clean up and fix /proc/<pid>/mem handling	2012-01-17 15:21:19 -08:00
cmdline.c
consoles.c
cpuinfo.c
devices.c
generic.c
inode.c	procfs: add hidepid= and gid= mount options	2012-01-10 16:30:54 -08:00
internal.h	procfs: parse mount options	2012-01-10 16:30:54 -08:00
interrupts.c
Kconfig
kcore.c
kmsg.c
loadavg.c
Makefile
meminfo.c
mmu.c
namespaces.c
nommu.c
page.c
proc_devtree.c
proc_net.c
proc_sysctl.c
proc_tty.c
root.c	procfs: add hidepid= and gid= mount options	2012-01-10 16:30:54 -08:00
softirqs.c
stat.c
task_mmu.c
task_nommu.c
uptime.c
version.c
vmcore.c