Artem Fetishev 70335abb26 fs/proc/base.c: fix GPF in /proc/$PID/map_files ... The expected logic of proc_map_files_get_link() is either to return 0 and initialize 'path' or return an error and leave 'path' uninitialized. By the time dname_to_vma_addr() returns 0 the corresponding vma may have already be gone. In this case the path is not initialized but the return value is still 0. This results in 'general protection fault' inside d_path(). Steps to reproduce: CONFIG_CHECKPOINT_RESTORE=y fd = open(...); while (1) { mmap(fd, ...); munmap(fd, ...); } ls -la /proc/$PID/map_files Addresses https://bugzilla.kernel.org/show_bug.cgi?id=68991 Signed-off-by: Artem Fetishev <artem_fetishev@epam.com> Signed-off-by: Aleksandr Terekhov <aleksandr_terekhov@epam.com> Reported-by: <wiebittewas@gmail.com> Acked-by: Pavel Emelyanov <xemul@parallels.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-03-10 17:26:20 -07:00
..
array.c	fs/proc/array.c: change do_task_stat() to use while_each_thread()	2014-01-23 16:37:02 -08:00
base.c	fs/proc/base.c: fix GPF in /proc/$PID/map_files	2014-03-10 17:26:20 -07:00
cmdline.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
consoles.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
cpuinfo.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
devices.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
fd.c
fd.h
generic.c	proc: set attributes of pde using accessor functions	2014-01-23 16:37:01 -08:00
inode.c
internal.h
interrupts.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Kconfig
kcore.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
kmsg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
loadavg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Makefile
meminfo.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
namespaces.c
nommu.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
page.c	mm: close PageTail race	2014-03-04 07:55:47 -08:00
proc_devtree.c	fs/proc/proc_devtree.c: remove empty /proc/device-tree when no openfirmware exists.	2014-01-23 16:37:01 -08:00
proc_net.c
proc_sysctl.c
proc_tty.c
root.c
self.c
softirqs.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
stat.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
task_mmu.c
task_nommu.c
uptime.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
version.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
vmcore.c	vmcore: prevent PT_NOTE p_memsz overflow during header update	2014-02-10 16:01:40 -08:00