kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-16 22:39:48 +00:00
Code Issues Releases Packages Activity
linux/fs/exportfs
History
Pan Bian bc78b2c955 exportfs: do not read dentry after free 
commit 2084ac6c50 upstream.

The function dentry_connected calls dput(dentry) to drop the previously
acquired reference to dentry. In this case, dentry can be released.
After that, IS_ROOT(dentry) checks the condition
(dentry == dentry->d_parent), which may result in a use-after-free bug.
This patch directly compares dentry with its parent obtained before
dropping the reference.

Fixes: a056cc8934c("exportfs: stop retrying once we race with
rename/remove")

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2019-02-11 17:54:10 +00:00
..
expfs.c exportfs: do not read dentry after free 2019-02-11 17:54:10 +00:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00