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78c2e50253
linux/net
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Pavel Emelyanov 78c2e50253 [IPV6]: Fix race in ipv6_flowlabel_opt() when inserting two labels 
In the IPV6_FL_A_GET case the hash is checked for flowlabels
with the given label. If it is not found, the lock, protecting 
the hash, is dropped to be re-get for writing. After this a
newly allocated entry is inserted, but no checks are performed
to catch a classical SMP race, when the conflicting label may 
be inserted on another cpu.

Use the (currently unused) return value from fl_intern() to
return the conflicting entry (if found) and re-check, whether
we can reuse it (IPV6_FL_F_EXCL) or return -EEXISTS.

Also add the comment, about why not re-lookup the current
sock for conflicting flowlabel entry.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-18 05:18:56 -07:00
..
9p 9p: remove sysctl 2007-10-17 14:35:15 -05:00
802 [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
8021q [8021Q]: transfer dev_id from real device 2007-10-10 16:54:56 -07:00
appletalk [NET]: sparse warning fixes 2007-10-10 16:54:48 -07:00
atm [BR2684]: get rid of broken header code. 2007-10-17 19:39:22 -07:00
ax25 [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
bluetooth [BLUETOOTH]: Make hidp_setup_input() return int 2007-10-10 16:52:39 -07:00
bridge [BRIDGE]: Remove SKB share checks in br_nf_pre_routing(). 2007-10-15 12:26:35 -07:00
core [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
dccp [DCCP]: fix link error with !CONFIG_SYSCTL 2007-10-17 19:33:06 -07:00
decnet [NETFILTER]: Replace sk_buff ** with sk_buff * 2007-10-15 12:26:29 -07:00
econet [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
ethernet [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
ieee80211 [PATCH] ieee80211: fix TKIP QoS bug 2007-10-16 20:58:12 -04:00
ipv4 [TCP]: Remove lost_retrans zero seqno special cases 2007-10-18 05:07:57 -07:00
ipv6 [IPV6]: Fix race in ipv6_flowlabel_opt() when inserting two labels 2007-10-18 05:18:56 -07:00
ipx [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
irda [IRDA]: IrCOMM discovery indication simplification 2007-10-17 19:34:11 -07:00
iucv [AF_IUCV]: postpone receival of iucv-packets 2007-10-10 16:54:51 -07:00
key [IPSEC]: Lock state when copying non-atomic fields to user-space 2007-10-10 16:55:02 -07:00
lapb [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
llc [NET]: Introduce and use print_mac() and DECLARE_MAC_BUF() 2007-10-10 16:51:42 -07:00
mac80211 [MAC80211]: only honor IW_SCAN_THIS_ESSID in STA, IBSS, and AP modes 2007-10-17 21:16:16 -07:00
netfilter [NETFILTER]: xt_sctp: fix mistake to pass a pointer where array is required 2007-10-18 05:12:21 -07:00
netlabel [NETLINK]: Introduce nested and byteorder flag to netlink attribute 2007-10-10 16:49:16 -07:00
netlink [NETLINK]: Don't leak 'listeners' in netlink_kernel_create() 2007-10-15 12:26:32 -07:00
netrom [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
packet [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
rfkill [RFKILL]: Add support for hardware-only rfkill buttons 2007-10-10 16:54:11 -07:00
rose [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
rxrpc KEYS: Make request_key() and co fundamentally asynchronous 2007-10-17 08:42:57 -07:00
sched [NET]: fix carrier-on bug? 2007-10-17 23:26:43 -07:00
sctp Remove "unsafe" from module struct 2007-10-17 08:42:49 -07:00
sunrpc Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
tipc [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
unix sched: affine sync wakeups 2007-10-15 17:00:19 +02:00
wanrouter [NET]: Make /proc/net per network namespace 2007-10-10 16:49:06 -07:00
wireless Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
x25 [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
xfrm [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
compat.c O_CLOEXEC for SCM_RIGHTS 2007-07-16 09:05:45 -07:00
Kconfig [NET]: Add network namespace clone & unshare support. 2007-10-10 16:52:46 -07:00
Makefile 9p: Reorganization of 9p file system code 2007-07-14 15:13:40 -05:00
nonet.c
socket.c r/o bind mounts: filesystem helpers for custom 'struct file's 2007-10-17 08:43:04 -07:00
sysctl_net.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
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