]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[PATCH] namei fixes (15/19)
authorAl Viro <viro@www.linux.org.uk>
Mon, 6 Jun 2005 20:36:11 +0000 (13:36 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org>
Mon, 6 Jun 2005 21:42:27 +0000 (14:42 -0700)
commitd9d29a29669f96903d9950bb881c2a393fd33849
treed2e12822db98a1bf8feac9f428ba18d867771a85
parent4b7b9772e4c3d87e649d4c419d2487aacf1235aa
[PATCH] namei fixes (15/19)

Getting rid of sloppy logics:

a) in do_follow_link() we have the wrong vfsmount dropped if our symlink
had been mounted on something.  Currently it worls only because we never
get such situation (modulo filesystem playing dirty tricks on us).  And
it obfuscates already convoluted logics...

b) same goes for open_namei().

c) in __link_path_walk() we have another "it should never happen" sloppiness -
out_dput: there does double-free on underlying vfsmount and leaks the covering
one if we hit it just after crossing a mountpoint.  Again, wrong vfsmount
getting dropped.

d) another too-early-mntput() race - in do_follow_mount() we need to postpone
conditional mntput(path->mnt) until after dput(path->dentry).  Again, this one
happens only in it-currently-never-happens-unless-some-fs-plays-dirty
scenario...

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
fs/namei.c