Matthew Ahrens 169ab07cc8 OpenZFS 7263 - deeply nested nvlist can overflow stack ... nvlist_pack() and nvlist_unpack are implemented recursively, which can cause the stack to overflow with a deeply nested nvlist; i.e. an nvlist which contains an nvlist, which contains an nvlist, which... Unprivileged users can pass an nvlist to the kernel via certain ioctls on /dev/zfs, which the kernel will unpack without additional permission checking or validation. Therefore, an unprivileged user can cause the kernel's stack to overflow and panic. Ideally, these functions would be implemented non-recursively. As a quick fix, this patch limits the depth of the recursion and returns an error when attempting to pack and unpack a deeply-nested nvlist. Signed-off-by: Adam Leventhal <ahl@delphix.com> Signed-off-by: George Wilson <george.wilson@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Ported-by: Prakash Surya <prakash.surya@delphix.com> OpenZFS-issue: https://www.illumos.org/issues/7263 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/0511d6d -		2016-08-11 15:58:03 -07:00
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fnvpair.c	Illumos #3464	2013-09-04 16:01:24 -07:00
Makefile.in	Support parallel build trees (VPATH builds)	2015-07-17 13:42:51 -07:00
nvpair_alloc_fixed.c	Add linux kernel module support	2010-08-31 13:41:58 -07:00
nvpair_alloc_spl.c	Use vmem_alloc() for nvlists	2015-02-10 11:00:08 -08:00
nvpair.c	OpenZFS 7263 - deeply nested nvlist can overflow stack	2016-08-11 15:58:03 -07:00