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f82360acf2
freebsd-dev/sys
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Konstantin Belousov f82360acf2 Existing VOP_VPTOCNP() interface has a fatal flow that is critical for 
nullfs.  The problem is that resulting vnode is only required to be
held on return from the successfull call to vop, instead of being
referenced.

Nullfs VOP_INACTIVE() method reclaims the vnode, which in combination
with the VOP_VPTOCNP() interface means that the directory vnode
returned from VOP_VPTOCNP() is reclaimed in advance, causing
vn_fullpath() to error with EBADF or like.

Change the interface for VOP_VPTOCNP(), now the dvp must be
referenced. Convert all in-tree implementations of VOP_VPTOCNP(),
which is trivial, because vhold(9) and vref(9) are similar in the
locking prerequisites. Out-of-tree fs implementation of VOP_VPTOCNP(),
if any, should have no trouble with the fix.

Tested by:	pho
Reviewed by:	mckusick
MFC after:	3 weeks (subject of re approval)
2011-11-19 07:50:49 +00:00
..
amd64 Regenerate system call tables. 2011-11-19 07:20:20 +00:00
arm Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on 2011-11-08 10:18:07 +00:00
boot Wire the kernel text RWX, rather than RX. We're not quite ready 2011-11-17 15:51:03 +00:00
bsm
cam Introduce CAM_SIM_POLLED SIM flag, indicating that it works in polling mode. 2011-11-17 21:07:56 +00:00
cddl Existing VOP_VPTOCNP() interface has a fatal flow that is critical for 2011-11-19 07:50:49 +00:00
compat Make the Linux *at() calls a bit more complete. 2011-11-19 07:19:37 +00:00
conf Add unicode support to msdosfs and smbfs; original pathes from imura, 2011-11-18 03:05:20 +00:00
contrib Add missing PF_UNLOCK in pf_test 2011-10-30 14:55:00 +00:00
crypto Update Copyright. 2011-10-27 14:15:26 +00:00
ddb
dev There's no need export the device interface methods of miibus(4). 2011-11-18 22:58:13 +00:00
fs Existing VOP_VPTOCNP() interface has a fatal flow that is critical for 2011-11-19 07:50:49 +00:00
gdb
geom Temporary revert r227009 to fix freeze on UP systems without PREEMPTION. 2011-11-14 19:32:05 +00:00
gnu Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
i386 Regenerate system call tables. 2011-11-19 07:20:20 +00:00
ia64 Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on 2011-11-08 10:18:07 +00:00
isa
kern Existing VOP_VPTOCNP() interface has a fatal flow that is critical for 2011-11-19 07:50:49 +00:00
kgssapi
libkern Add unicode support to msdosfs and smbfs; original pathes from imura, 2011-11-18 03:05:20 +00:00
mips Rearrange XLP configuration files. 2011-11-18 11:18:59 +00:00
modules Limit building sfxge(4) to amd64 only to unbreak the tinderboxen. The driver 2011-11-18 11:10:14 +00:00
net Bring in support for netmap, a framework for very efficient packet 2011-11-17 12:17:39 +00:00
net80211 .. add missing include from an incorrect merge. 2011-11-08 14:34:01 +00:00
netatalk
netgraph In r191367 the need for if_free_type() was removed and a new member 2011-11-11 22:57:52 +00:00
netinet Cleanup comparison of interface names. 2011-11-18 09:01:08 +00:00
netinet6 Return the correct value for the IPV6_MULTICAST_HOPS getsockopt() call. 2011-11-13 02:32:10 +00:00
netipsec
netipx Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
netnatm
netncp
netsmb Add unicode support to msdosfs and smbfs; original pathes from imura, 2011-11-18 03:05:20 +00:00
nfs Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
nfsclient The old NFS client will crash due to the reply being m_freem()'d 2011-11-19 03:20:15 +00:00
nfsserver
nlm Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
ofed Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
opencrypto
pc98 Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on 2011-11-08 10:18:07 +00:00
pci Add preliminary support for RTL8168/8111F PCIe Gigabit ethernet. 2011-11-17 22:07:50 +00:00
powerpc Use a global __pure2 function instead of a global register variable for 2011-11-17 15:49:42 +00:00
rpc Both a crash reported on freebsd-current on Oct. 18 under the 2011-11-03 14:38:03 +00:00
security Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
sparc64 Fix make universe. 2011-11-16 18:42:43 +00:00
sys Regenerate system call tables. 2011-11-19 06:36:11 +00:00
teken
tools Restore the comment that I removed by accident. 2011-11-09 13:26:59 +00:00
ufs Use implementation independent inoNN_t scalars for on-disk UFS structures 2011-11-09 07:48:48 +00:00
vm Eliminate end-of-line white space. 2011-11-17 06:54:49 +00:00
x86 Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
xdr
xen
Makefile