David Howells 04c567d931 [PATCH] Keys: Fix race between two instantiators of a key ... Add a revocation notification method to the key type and calls it whilst the key's semaphore is still write-locked after setting the revocation flag. The patch then uses this to maintain a reference on the task_struct of the process that calls request_key() for as long as the authorisation key remains unrevoked. This fixes a potential race between two processes both of which have assumed the authority to instantiate a key (one may have forked the other for example). The problem is that there's no locking around the check for revocation of the auth key and the use of the task_struct it points to, nor does the auth key keep a reference on the task_struct. Access to the "context" pointer in the auth key must thenceforth be done with the auth key semaphore held. The revocation method is called with the target key semaphore held write-locked and the search of the context process's keyrings is done with the auth key semaphore read-locked. The check for the revocation state of the auth key just prior to searching it is done after the auth key is read-locked for the search. This ensures that the auth key can't be revoked between the check and the search. The revocation notification method is added so that the context task_struct can be released as soon as instantiation happens rather than waiting for the auth key to be destroyed, thus avoiding the unnecessary pinning of the requesting process. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-06-22 15:05:56 -07:00
..
amba
byteorder
dvb
hdlc
isdn
lockd
mmc	[ARM] 3531/1: i.MX/MX1 SD/MMC ensure, that clock are stopped before new command and cleanups	2006-05-19 21:48:03 +01:00
mtd	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
netfilter	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
netfilter_arp
netfilter_bridge
netfilter_ipv4	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
netfilter_ipv6
nfsd
raid
spi	[PATCH] SPI: busnum == 0 needs to work	2006-05-16 14:33:57 -07:00
sunrpc
tc_act
tc_ematch
usb	[PATCH] USB: move <linux/usb_input.h> to <linux/usb/input.h>	2006-06-21 15:04:18 -07:00
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi.h
adb.h
adfs_fs_i.h
adfs_fs_sb.h
adfs_fs.h
affs_fs.h
affs_hardblocks.h	Include <linux/types.h> and use __uXX types in <linux/affs_hardblocks.h>	2006-05-04 15:49:24 +01:00
agp_backend.h
agpgart.h
aio_abi.h
aio.h
amifd.h
amifdreg.h
amigaffs.h
apm_bios.h
arcdevice.h
arcfb.h
ata.h
atalk.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h	Merge branch 'audit.b21' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current	2006-06-20 15:37:56 -07:00
auto_fs4.h
auto_fs.h
auxvec.h
awe_voice.h
ax25.h
b1lli.h
b1pcmcia.h
backing-dev.h
backlight.h
baycom.h
bcd.h
bfs_fs.h
binfmts.h
bio.h
bit_spinlock.h
bitmap.h
bitops.h
blkdev.h	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2006-06-21 11:18:25 -07:00
blkpg.h
blktrace_api.h
blockgroup_lock.h
bootmem.h
bpqether.h
buffer_head.h
cache.h
calc64.h
capability.h
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
chio.h
circ_buf.h
clk.h
cm4000_cs.h
cn_proc.h
cobalt-nvram.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_proc.h
coda_psdev.h
coda.h
coff.h
com20020.h
compat_ioctl.h
compat.h
compiler-gcc3.h
compiler-gcc4.h
compiler-gcc.h
compiler-intel.h
compiler.h	Restore __attribute_const__ to user-visibility in linux/compiler.h...for now	2006-05-04 00:41:02 +01:00
completion.h
comstats.h
concap.h
config.h
configfs.h
connector.h
console_struct.h
console.h	Add support for suspending and resuming the whole console subsystem	2006-06-19 18:16:01 -07:00
consolemap.h
cpu.h
cpufreq.h
cpumask.h
cpuset.h
cramfs_fs_sb.h
cramfs_fs.h	Include <linux/types.h> and use __uXX types in <linux/cramfs_fs.h>	2006-05-04 17:50:04 +01:00
crash_dump.h
crc16.h
crc32.h
crc32c.h
crc-ccitt.h
crypto.h
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dcache.h
dccp.h
dcookies.h
debugfs.h
delay.h
devfs_fs_kernel.h
devfs_fs.h
device-mapper.h
device.h	[PATCH] Driver Core: Make dev_info and friends print the bus name if there is no driver	2006-06-21 12:40:49 -07:00
devpts_fs.h
dio.h
dirent.h
divert.h	Use __uXX types in <linux/divert.h> for struct divert_blk et al.	2006-05-04 15:07:59 +01:00
dm9000.h
dm-ioctl.h
dma-mapping.h	dl2k: use DMA_48BIT_MASK constant	2006-05-10 14:04:22 -07:00
dmaengine.h	[I/OAT]: Utility functions for offloading sk_buff to iovec copies	2006-06-17 21:25:46 -07:00
dmapool.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1286.h
ds1742rtc.h
ds17287rtc.h
dtlk.h
edd.h
efi.h
efs_dir.h
efs_fs_i.h
efs_fs_sb.h
efs_fs.h
efs_vh.h
eisa.h
elevator.h	[PATCH] elevator switching race	2006-06-08 15:14:23 -07:00
elf-em.h
elf-fdpic.h
elf.h
elfcore.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h
eventpoll.h
ext2_fs_sb.h
ext2_fs.h
ext3_fs_i.h
ext3_fs_sb.h
ext3_fs.h	Remove private struct dx_hash_info from public view in <linux/ext3_fs.h>	2006-05-04 17:28:26 +01:00
ext3_jbd.h
fadvise.h
fb.h
fcdevice.h
fcntl.h
fd1772.h
fd.h
fddidevice.h
fdreg.h
file.h
filter.h
firmware.h	[PATCH] drivers/base/firmware_class.c: cleanups	2006-05-21 12:59:19 -07:00
flat.h
font.h
fs_enet_pd.h
fs_struct.h
fs_uart_pd.h	[PATCH] ppc32 CPM_UART: fixes and improvements	2006-05-03 23:06:44 +10:00
fs.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2006-05-24 09:22:21 +01:00
fsl_devices.h	[PATCH] spi: add spi master driver for Freescale MPC83xx SPI controller	2006-05-21 12:59:19 -07:00
fsnotify.h	[PATCH] log more info for directory entry change events	2006-06-20 05:25:28 -04:00
ftape-header-segment.h
ftape-vendors.h
ftape.h
fuse.h
futex.h
gameport.h
gen_stats.h
genalloc.h
generic_serial.h
genetlink.h
genhd.h
gfp.h
gigaset_dev.h
hardirq.h
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hdsmart.h
hiddev.h
highmem.h
highuid.h
hil_mlc.h
hil.h
hippidevice.h
hp_sdc.h
hpet.h
hpfs_fs.h
hrtimer.h
hugetlb.h
hwmon-sysfs.h
hwmon-vid.h
hwmon.h
hysdn_if.h
i2c-algo-bit.h
i2c-algo-ite.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-algo-sibyte.h
i2c-dev.h
i2c-id.h
i2c-isa.h
i2c-pxa.h
i2c.h
i2o-dev.h	Use __uXX types in <linux/i2o_dev.h>, include <linux/ioctl.h> too	2006-05-04 17:32:44 +01:00
i2o.h	[PATCH] I2O: Bugfixes to get I2O working again	2006-06-10 11:02:05 -07:00
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h
idr.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
if_cablemodem.h
if_ec.h
if_eql.h
if_ether.h
if_fc.h
if_fddi.h	Remove struct fddi_statistics from user view in <linux/if_fddi.h>	2006-05-16 23:25:37 +01:00
if_frad.h
if_hippi.h
if_infiniband.h
if_ltalk.h
if_packet.h
if_plip.h
if_ppp.h
if_pppox.h
if_shaper.h
if_slip.h
if_strip.h
if_tr.h
if_tun.h
if_tunnel.h
if_vlan.h
if_wanpipe_common.h
if_wanpipe.h
if.h
igmp.h	[IPV4] igmp: Fixup struct ip_mc_list::multiaddr type	2006-06-17 21:29:37 -07:00
in6.h
in_route.h
in.h
inet_diag.h
inet.h
inetdevice.h
init_task.h
init.h
initrd.h
inotify.h	[PATCH] inotify (4/5): allow watch removal from event handler	2006-06-20 05:25:19 -04:00
input.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
interrupt.h
io.h	[PATCH] add __iowrite64_copy	2006-06-20 20:24:58 -07:00
ioc3.h
ioc4.h
ioctl32.h
ioctl.h
ioport.h
ioprio.h
ip6_tunnel.h
ip_mp_alg.h
ip.h
ipc.h
ipmi_msgdefs.h
ipmi_smi.h
ipmi.h
ipsec.h
ipv6_route.h
ipv6.h
ipx.h
irda.h
irq_cpustat.h
irq.h
isa.h	[PATCH] Driver model: add ISA bus	2006-06-21 12:40:49 -07:00
isapnp.h
isdn_divertif.h
isdn_ppp.h
isdn.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ite_gpio.h
ixjuser.h
jbd.h
jffs2.h	Merge git://git.infradead.org/jffs2-xattr-2.6	2006-05-20 17:27:32 +01:00
jffs.h
jhash.h
jiffies.h
journal-head.h
joystick.h	Switch to __s32 types in joystick.h instead of C99 types for consistency.	2006-06-03 00:27:53 +01:00
kallsyms.h
kbd_diacr.h
kbd_kern.h
kd.h
kdev_t.h
kernel_stat.h
kernel.h	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
kernelcapi.h
kexec.h
key-ui.h
key.h	[PATCH] Keys: Fix race between two instantiators of a key	2006-06-22 15:05:56 -07:00
keyboard.h
keyctl.h
kfifo.h
klist.h
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject.h	[PATCH] Driver Core: Add /sys/hypervisor when needed	2006-06-21 12:40:48 -07:00
kprobes.h
kref.h
kthread.h
ktime.h
lapb.h
lcd.h
leds.h
libata.h
libps2.h
limits.h
linkage.h
linux_logo.h
list.h
llc.h
loop.h
lp.h
m48t86.h	[PATCH] m48t86: ia64 build fix	2006-06-05 12:29:17 -07:00
major.h
matroxfb.h
mbcache.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
memory_hotplug.h
memory.h
mempolicy.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
mempool.h
meye.h
migrate.h
mii.h
minix_fs.h
miscdevice.h
mm_inline.h
mm.h
mman.h
mmtimer.h
mmzone.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
mod_devicetable.h
module.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h
msg.h
mtio.h
mutex-debug.h
mutex.h
mv643xx.h
n_r3964.h
namei.h
namespace.h
nbd.h	Use __uXX types in user-visible structures in <linux/nbd.h>	2006-05-04 02:55:50 +01:00
ncp_fs_i.h
ncp_fs_sb.h
ncp_fs.h
ncp_mount.h
ncp_no.h
ncp.h
net.h
netdevice.h	Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2006-06-20 17:39:53 -07:00
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netfilter_logging.h
netfilter.h
netlink.h
netpoll.h
netrom.h
nfs2.h
nfs3.h
nfs4_acl.h
nfs4_mount.h
nfs4.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfs_page.h
nfs_xdr.h
nfs.h
nfsacl.h
nfsd_idmap.h
nls.h
nmi.h
node.h
nodemask.h
notifier.h
nubus.h
numa.h
nvram.h
openprom_fs.h
oprofile.h
page-flags.h
pagemap.h
pagevec.h
param.h
parport_pc.h
parport.h
parser.h
patchkey.h
pci_ids.h	Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2006-06-19 18:55:56 -07:00
pci_regs.h
pci-acpi.h	[PATCH] PCI: fix pciehp compile issue when CONFIG_ACPI is not enabled	2006-06-11 14:02:27 -07:00
pci.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
pcieport_if.h
percpu_counter.h
percpu.h
personality.h
pfkeyv2.h	[PFKEYV2]: Fix inconsistent typing in struct sadb_x_kmprivate.	2006-06-17 22:54:03 -07:00
pfn.h
pg.h
phonedev.h
phy.h
pid.h
pipe_fs_i.h	[PATCH] splice: LRU fixups	2006-05-04 06:55:12 +02:00
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform_device.h
pm_legacy.h
pm.h
pmu.h
pnp.h
pnpbios.h
poll.h
posix_acl_xattr.h
posix_acl.h
posix_types.h
posix-timers.h
ppdev.h
ppp_channel.h
ppp_defs.h	Remove PPP_FCS from user view in <linux/ppp_defs.h>, remove __P mess entirely	2006-05-04 12:07:37 +01:00
ppp-comp.h
prctl.h
preempt.h
prefetch.h
prio_tree.h
proc_fs.h
profile.h
ps2esdi.h
ptrace.h
qic117.h
qnx4_fs.h
qnxtypes.h
quota.h
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h
raid_class.h
ramfs.h
random.h
raw.h
rbtree.h	[RBTREE] Switch rb_colour() et al to en_US spelling of 'color' for consistency	2006-06-05 20:19:05 +01:00
rcupdate.h	[PATCH] RCU: introduce rcu_needs_cpu() interface	2006-05-15 11:20:55 -07:00
reboot_fixups.h
reboot.h
reiserfs_acl.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_fs.h
reiserfs_xattr.h
relay.h
resource.h
rio_drv.h
rio_ids.h
rio_regs.h
rio.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc.h
rtnetlink.h
rwsem-spinlock.h
rwsem.h
sc26198.h
scatterlist.h
scc.h
sched.h	Merge branch 'audit.b21' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current	2006-06-20 15:37:56 -07:00
screen_info.h
sctp.h
scx200_gpio.h
scx200.h
sdla_fr.h
sdla.h
seccomp.h
securebits.h
security.h	[PATCH] selinux: add hooks for key subsystem	2006-06-22 15:05:55 -07:00
selection.h
selinux_netlink.h
selinux.h	[SECMARK]: Add SELinux exports	2006-06-17 21:29:55 -07:00
sem.h
seq_file.h
seqlock.h
serial167.h
serial_8250.h
serial_core.h	Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm	2006-06-20 17:52:36 -07:00
serial_ip3106.h
serial_reg.h
serial.h
serialP.h
serio.h
shm.h
shmem_fs.h
signal.h
skbuff.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
slab.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2006-05-24 09:22:21 +01:00
smb_fs_i.h
smb_fs_sb.h
smb_fs.h
smb_mount.h
smb.h
smbno.h
smp_lock.h
smp.h
snmp.h
socket.h
sockios.h
som.h
sonet.h
sonypi.h
sort.h
sound.h
soundcard.h
spinlock_api_smp.h
spinlock_api_up.h
spinlock_types_up.h
spinlock_types.h
spinlock_up.h
spinlock.h
stallion.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h
stringify.h
superhyway.h
suspend.h
swap.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2006-05-24 09:22:21 +01:00
swapops.h
synclink.h
sys.h
syscalls.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2006-05-24 09:22:21 +01:00
sysctl.h	[TCP]: Add tcp_slow_start_after_idle sysctl.	2006-06-17 21:30:53 -07:00
sysdev.h	[PATCH] Driver Core: Allow sysdev_class have attributes	2006-06-21 12:40:48 -07:00
sysfs.h
sysrq.h
sysv_fs.h
tcp.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
telephony.h
termios.h
textsearch_fsm.h
textsearch.h
tfrc.h
thread_info.h
threads.h
ticable.h
time.h
timer.h
times.h
timex.h
tiocl.h
tipc_config.h
tipc.h
topology.h
toshiba.h
transport_class.h
trdevice.h
tty_driver.h
tty_flip.h
tty_ldisc.h
tty.h	[PATCH] TTY: return class device pointer from tty_register_device()	2006-06-21 12:40:47 -07:00
types.h
udf_fs_i.h
udf_fs_sb.h
udf_fs.h
udp.h
ufs_fs_i.h
ufs_fs_sb.h
ufs_fs.h	Remove unneeded inclusion of <linux/time.h> from <linux/ufs_fs.h>	2006-05-04 00:59:14 +01:00
uinput.h
uio.h
ultrasound.h
umem.h
un.h
unistd.h
usb_ch9.h
usb_gadget.h
usb_gadgetfs.h
usb_otg.h
usb_usual.h
usb.h	[PATCH] USB: convert usb class devices to real devices	2006-06-21 15:04:19 -07:00
usbdevice_fs.h
user.h
utime.h
uts.h
utsname.h
vermagic.h
vfs.h
via.h
video_decoder.h
video_encoder.h
videodev2.h	V4L/DVB (3774): Create V4L1 config options	2006-05-12 19:54:53 -03:00
videodev.h
videotext.h
vmalloc.h
vt_buffer.h
vt_kern.h	Merge git://git.infradead.org/hdrcleanup-2.6	2006-06-20 15:10:08 -07:00
vt.h
wait.h
wanrouter.h
watchdog.h
wavefront.h
wireless.h
workqueue.h
writeback.h
x25.h
xattr.h
xfrm.h	[IPSEC] xfrm: Abstract out encapsulation modes	2006-06-17 21:28:39 -07:00
yam.h
zconf.h
zftape.h
zlib.h
zorro_ids.h
zorro.h
zutil.h