The previous fix for the conntrack creation race (netfilter: ctnetlink:
fix conntrack creation race) missed a GFP_KERNEL allocation that is
now performed while holding a spinlock. Switch to GFP_ATOMIC.
Reported-and-tested-by: Zoltan Borbely <bozo@andrews.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
this warning:
net/netfilter/nf_conntrack_ftp.c: In function 'help':
net/netfilter/nf_conntrack_ftp.c:360: warning: 'matchoff' may be used uninitialized in this function
net/netfilter/nf_conntrack_ftp.c:360: warning: 'matchlen' may be used uninitialized in this function
triggers because GCC does not recognize the (correct) error flow
between find_pattern(), 'found', 'matchoff' and 'matchlen'.
Annotate it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Conntrack creation through ctnetlink has two races:
- the timer may expire and free the conntrack concurrently, causing an
invalid memory access when attempting to put it in the hash tables
- an identical conntrack entry may be created in the packet processing
path in the time between the lookup and hash insertion
Hold the conntrack lock between the lookup and insertion to avoid this.
Reported-by: Zoltan Borbely <bozo@andrews.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
The message triggers when sending non-FTP data on port 21 or with
certain clients that use multiple syscalls to send the command.
Change to pr_debug() since users have been complaining.
Signed-off-by: Patrick McHardy <kaber@trash.net>
net/netfilter/nf_conntrack_proto_sctp.c: In function 'sctp_packet':
net/netfilter/nf_conntrack_proto_sctp.c:376: warning: array subscript is above array bounds
gcc doesn't realize that do_basic_checks() guarantees that there is
at least one valid chunk and thus new_state is never SCTP_CONNTRACK_MAX
after the loop. Initialize to SCTP_CONNTRACK_NONE to avoid the warning.
Based on patch by Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Not needed, since creation and removal are done by name.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
net/netfilter/nf_conntrack_core.c:46:1: warning: symbol 'nfnetlink_parse_nat_setup_hook' was not declared. Should it be static?
Including the proper header also revealed an incorrect prototype.
Signed-off-by: Patrick McHardy <kaber@trash.net>
net/netfilter/nfnetlink_log.c:537:1: warning: symbol 'nfulnl_log_packet' was not declared. Should it be static?
Including the proper header also revealed an incorrect prototype.
Signed-off-by: Patrick McHardy <kaber@trash.net>
As for now, the creation and update of conntracks via ctnetlink do not
propagate an event to userspace. This can result in inconsistent situations
if several userspace processes modify the connection tracking table by means
of ctnetlink at the same time. Specifically, using the conntrack command
line tool and conntrackd at the same time can trigger unconsistencies.
This patch also modifies the event cache infrastructure to pass the
process PID and the ECHO flag to nfnetlink_send() to report back
to userspace if the process that triggered the change needs so.
Based on a suggestion from Patrick McHardy.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This patch adds module loading for helpers via ctnetlink.
* Creation path: We support explicit and implicit helper assignation. For
the explicit case, we try to load the module. If the module is correctly
loaded and the helper is present, we return EAGAIN to re-start the
creation. Otherwise, we return EOPNOTSUPP.
* Update path: release the spin lock, load the module and check. If it is
present, then return EAGAIN to re-start the update.
This patch provides a refactorized function to lookup-and-set the
connection tracking helper. The function removes the exported symbol
__nf_ct_helper_find as it has not clients anymore.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This patch adds the macro MODULE_ALIAS_NFCT_HELPER that defines a
way to provide generic and persistent aliases for the connection
tracking helpers.
This next patch requires this patch.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This patch replaces the unnecessary module refcounting with
the read-side locks. With this patch, all the dump and fill_info
function are called under the RCU read lock.
Based on a patch from Fabian Hugelshofer.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This patch changes the return value if the conntrack has no helper assigned.
Instead of EINVAL, which is reserved for malformed messages, it returns
EOPNOTSUPP.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Use nf_conntrack_get instead of the direct call to atomic_inc.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
payload_len is a be16 value, not cpu_endian, also the size of a ponter
to a struct ipv6hdr was being added, not the size of the struct itself.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch modifies xt_NFLOG to suppress the call to nf_log_packet()
function. The call of this wrapper in xt_NFLOG was causing NFLOG to
use the first initialized module. Thus, if ipt_ULOG is loaded before
nfnetlink_log all NFLOG rules are treated as plain LOG rules.
Signed-off-by: Eric Leblond <eric@inl.fr>
Signed-off-by: Patrick McHardy <kaber@trash.net>
I want to compile out proc_* and sysctl_* handlers totally and
stub them to NULL depending on config options, however usage of &
will prevent this, since taking adress of NULL pointer will break
compilation.
So, drop & in front of every ->proc_handler and every ->strategy
handler, it was never needed in fact.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove the 'supports_ipv6' scheduler flag since all schedulers now
support IPv6.
Signed-off-by: Julius Volz <julius.volz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add IPv6 support to LBLC and LBLCR schedulers. These were the last
schedulers without IPv6 support, but we might want to keep the
supports_ipv6 flag in the case of future schedulers without IPv6
support.
Signed-off-by: Julius Volz <julius.volz@gmail.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add IPv6 support to SH and DH schedulers. I hope this simple IPv6 address
hashing is good enough. The 128 bit are just XORed into 32 before hashing
them like an IPv4 address.
Signed-off-by: Julius Volz <julius.volz@gmail.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Using NIPQUAD() with NIPQUAD_FMT, %d.%d.%d.%d or %u.%u.%u.%u
can be replaced with %pI4
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
register_pernet_gen_device() can't be used is nf_conntrack_pptp module is
also used (compiled in or loaded).
Right now, proto_gre_net_exit() is called before nf_conntrack_pptp_net_exit().
The former shutdowns and frees GRE piece of netns, however the latter
absolutely needs it to flush keymap. Oops is inevitable.
Switch to shiny new register_pernet_gen_subsys() to get correct ordering in
netns ops list.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
netfilter: replace old NF_ARP calls with NFPROTO_ARP
netfilter: fix compilation error with NAT=n
netfilter: xt_recent: use proc_create_data()
netfilter: snmp nat leaks memory in case of failure
netfilter: xt_iprange: fix range inversion match
netfilter: netns: use NFPROTO_NUMPROTO instead of NUMPROTO for tables array
netfilter: ctnetlink: remove obsolete NAT dependency from Kconfig
pkt_sched: sch_generic: Fix oops in sch_teql
dccp: Port redirection support for DCCP
tcp: Fix IPv6 fallout from 'Port redirection support for TCP'
netdev: change name dropping error codes
ipvs: Update CONFIG_IP_VS_IPV6 description and help text
(Supplements: ee999d8b95)
NFPROTO_ARP actually has a different value from NF_ARP, so ensure all
callers use the new value so that packets _do_ get delivered to the
registered hooks.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes the compilation of ctnetlink when the NAT support
is not enabled.
/home/benh/kernels/linux-powerpc/net/netfilter/nf_conntrack_netlink.c:819: warning: enum nf_nat_manip_type\u2019 declared inside parameter list
/home/benh/kernels/linux-powerpc/net/netfilter/nf_conntrack_netlink.c:819: warning: its scope is only this definition or declaration, which is probably not what you want
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Inverted IPv4 v1 and IPv6 v0 matches don't match anything since 2.6.25-rc1!
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that ctnetlink doesn't have any NAT module depenencies anymore,
we can also remove them from Kconfig.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds a URL to further info to the CONFIG_IP_VS_IPV6 Kconfig help
text. Also, I think it should be ok to remove the "DANGEROUS" label in the
description line at this point to get people to try it out and find all
the bugs ;) It's still marked as experimental, of course.
Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
net: Remove CONFIG_KMOD from net/ (towards removing CONFIG_KMOD entirely)
ipv4: Add a missing rcu_assign_pointer() in routing cache.
[netdrvr] ibmtr: PCMCIA IBMTR is ok on 64bit
xen-netfront: Avoid unaligned accesses to IP header
lmc: copy_*_user under spinlock
[netdrvr] myri10ge, ixgbe: remove broken select INTEL_IOATDMA
Some code here depends on CONFIG_KMOD to not try to load
protocol modules or similar, replace by CONFIG_MODULES
where more than just request_module depends on CONFIG_KMOD
and and also use try_then_request_module in ebtables.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits)
UIO: Fix mapping of logical and virtual memory
UIO: add automata sercos3 pci card support
UIO: Change driver name of uio_pdrv
UIO: Add alignment warnings for uio-mem
Driver core: add bus_sort_breadthfirst() function
NET: convert the phy_device file to use bus_find_device_by_name
kobject: Cleanup kobject_rename and !CONFIG_SYSFS
kobject: Fix kobject_rename and !CONFIG_SYSFS
sysfs: Make dir and name args to sysfs_notify() const
platform: add new device registration helper
sysfs: use ilookup5() instead of ilookup5_nowait()
PNP: create device attributes via default device attributes
Driver core: make bus_find_device_by_name() more robust
usb: turn dev_warn+WARN_ON combos into dev_WARN
debug: use dev_WARN() rather than WARN_ON() in device_pm_add()
debug: Introduce a dev_WARN() function
sysfs: fix deadlock
device model: Do a quickcheck for driver binding before doing an expensive check
Driver core: Fix cleanup in device_create_vargs().
Driver core: Clarify device cleanup.
...
Signed-off-by: Danny ter Haar <dth@cistron.nl>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch removes the module dependency between ctnetlink and
nf_nat by means of an indirect call that is initialized when
nf_nat is loaded. Now, nf_conntrack_netlink only requires
nf_conntrack and nfnetlink.
This patch puts nfnetlink_parse_nat_setup_hook into the
nf_conntrack_core to avoid dependencies between ctnetlink,
nf_conntrack_ipv4 and nf_conntrack_ipv6.
This patch also introduces the function ctnetlink_change_nat
that is only invoked from the creation path. Actually, the
nat handling cannot be invoked from the update path since
this is not allowed. By introducing this function, we remove
the useless nat handling in the update path and we avoid
deadlock-prone code.
This patch also adds the required EAGAIN logic for nfnetlink.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
The file(s) below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
net/netfilter/nf_tproxy_core.c
This patch removes the said #include <version.h>.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus noted a build failure case:
net/netfilter/ipvs/ip_vs_xmit.c: In function 'ip_vs_tunnel_xmit':
net/netfilter/ipvs/ip_vs_xmit.c:616: error: implicit declaration of function 'ip_select_ident'
The proper include file (net/ip.h) is being included in ip_vs_xmit.c to get
that declaration. So the only possible case where this can happen is if
CONFIG_INET is not enabled.
This seems to be purely a missing dependency in the ipvs/Kconfig file IP_VS
entry.
Also, while we're here, remove the out of date "EXPERIMENTAL" string in the
IP_VS config help header line. IP_VS no longer depends upon CONFIG_EXPERIMENTAL
Signed-off-by: David S. Miller <davem@davemloft.net>
