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877d24ac8a
freebsd-dev/sys/fs
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Konstantin Belousov 877d24ac8a Fix the mis-handling of the VV_TEXT on the nullfs vnodes. 
If you have a binary on a filesystem which is also mounted over by
nullfs, you could execute the binary from the lower filesystem, or
from the nullfs mount. When executed from lower filesystem, the lower
vnode gets VV_TEXT flag set, and the file cannot be modified while the
binary is active. But, if executed as the nullfs alias, only the
nullfs vnode gets VV_TEXT set, and you still can open the lower vnode
for write.

Add a set of VOPs for the VV_TEXT query, set and clear operations,
which are correctly bypassed to lower vnode.

Tested by:	pho (previous version)
MFC after:	2 weeks
2012-09-28 11:25:02 +00:00
..
cd9660 Use NULL instead of 0 for pointers 2012-07-22 15:40:31 +00:00
coda Fix the mis-handling of the VV_TEXT on the nullfs vnodes. 2012-09-28 11:25:02 +00:00
deadfs The deadfs VOPs for vop_ioctl and vop_bmap call itself recursively, 2012-09-13 13:05:45 +00:00
devfs Prefer __containerof() above member2struct(). 2012-09-15 19:28:54 +00:00
ext2fs Fix up kernel sources to be ready for a 64-bit ino_t. 2012-09-27 23:30:49 +00:00
fdescfs Use NULL instead of 0 2012-03-13 10:04:13 +00:00
fifofs I am comparing current pipe code with the one in 8.3-STABLE r236165, 2012-07-31 05:48:35 +00:00
hpfs Fix up kernel sources to be ready for a 64-bit ino_t. 2012-09-27 23:30:49 +00:00
msdosfs Use NULL instead of 0 for pointers 2012-07-22 15:40:31 +00:00
nandfs Prevent nump NULL pointer dereference in bmap_getlbns() 2012-09-11 09:38:32 +00:00
nfs Modify the NFSv4 client so that it can handle owner 2012-09-20 02:49:25 +00:00
nfsclient Modify the NFSv4 client so that it can handle owner 2012-09-20 02:49:25 +00:00
nfsserver Fix the mis-handling of the VV_TEXT on the nullfs vnodes. 2012-09-28 11:25:02 +00:00
ntfs Fix up kernel sources to be ready for a 64-bit ino_t. 2012-09-27 23:30:49 +00:00
nullfs Allow shared lookups for nullfs mounts, if lower filesystem supports 2012-09-09 19:20:23 +00:00
nwfs Do not leave invalid pages in the object after the short read for a 2012-08-14 11:45:47 +00:00
portalfs Use NULL instead of 0 for pointers 2012-07-22 15:40:31 +00:00
procfs Add procfs to jail-mountable filesystems. 2012-02-29 00:30:18 +00:00
pseudofs Apply inlined vn_vget_ino() algorithm for ".." lookup in pseudofs. 2012-03-05 11:38:02 +00:00
smbfs Do not leave invalid pages in the object after the short read for a 2012-08-14 11:45:47 +00:00
tmpfs Fix up kernel sources to be ready for a 64-bit ino_t. 2012-09-27 23:30:49 +00:00
udf Use NULL instead of 0 for pointers 2012-07-22 15:40:31 +00:00
unionfs Skip directory entries with zero inode number during traversal. 2012-05-16 10:44:09 +00:00