- 20 Aug, 2012 9 commits
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Eric Leblond authored
If a packet is emitted on one socket in one group of fanout sockets, it is transmitted again. It is thus read again on one of the sockets of the fanout group. This result in a loop for software which generate packets when receiving one. This retransmission is not the intended behavior: a fanout group must behave like a single socket. The packet should not be transmitted on a socket if it originates from a socket belonging to the same fanout group. This patch fixes the issue by changing the transmission check to take fanout group info account. Reported-by:
Aleksandr Kotov <a1k@mail.ru> Signed-off-by:
Eric Leblond <eric@regit.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Julia Lawall authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e1,e2; @@ if (ret < 0) { ... return ret; } ... when != ret = e1 when forall *if(...) { ... when != ret = e2 * return ret; } // </smpl> Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Julia Lawall authored
Move up the initialization of rc so that failure of pci_alloc_consistent returns -ENOMEM as well. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e1,e2; @@ if (ret < 0) { ... return ret; } ... when != ret = e1 when forall *if(...) { ... when != ret = e2 * return ret; } // </smpl> Signed-off-by:
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Julia Lawall authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e1,e2; @@ if (ret < 0) { ... return ret; } ... when != ret = e1 when forall *if(...) { ... when != ret = e2 * return ret; } // </smpl> Signed-off-by:
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Steve Glendinning authored
Signed-off-by:
Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by:
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Bjørn Mork authored
Newer firmware versions for the Pantech UML290 use a different subclass ID. The Windows driver match on both IDs, so we do that as well. The ZTE (Vodafone) K5006-Z is a new device. Cc: Dan Williams <dcbw@redhat.com> Cc: Thomas Schäfer <tschaefer@t-online.de> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
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Phil Edworthy authored
Signed-off-by:
Phil Edworthy <phil.edworthy@renesas.com> Signed-off-by:
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Timur Tabi authored
The mdio-mux driver scans all child mdio nodes, without regard to whether the node is actually used. Some device trees include all possible mdio-mux nodes and rely on the boot loader to disable those that are not present, based on some run-time configuration. Those nodes need to be skipped. Signed-off-by:
Timur Tabi <timur@freescale.com> Signed-off-by:
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Timur Tabi authored
Macro for_each_child_of_node() makes it easy to iterate over all of the children for a given device tree node, including those nodes that are marked as unavailable (i.e. status = "disabled"). Introduce for_each_available_child_of_node(), which is like for_each_child_of_node(), but it automatically skips unavailable nodes. This also requires the introduction of helper function of_get_next_available_child(), which returns the next available child node. Signed-off-by:
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- 16 Aug, 2012 18 commits
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John Fastabend authored
A race exists where creating cgroups and also updating the priomap may result in losing a priomap update. This is because priomap writers are not protected by rtnl_lock. Move priority writer into rtnl_lock()/rtnl_unlock(). CC: Neil Horman <nhorman@tuxdriver.com> Reported-by:
Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by:
John Fastabend <john.r.fastabend@intel.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
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John Fastabend authored
A socket fd passed in a SCM_RIGHTS datagram was not getting updated with the new tasks cgrp prioidx. This leaves IO on the socket tagged with the old tasks priority. To fix this add a check in the scm recvmsg path to update the sock cgrp prioidx with the new tasks value. Thanks to Al Viro for catching this. CC: Neil Horman <nhorman@tuxdriver.com> Reported-by:
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John Fastabend authored
Add lock to prevent a race with a file closing and also remove useless and ugly sscanf code. The extra code was never needed and the case it supposedly protected against is in fact handled correctly by sock_from_file as pointed out by Al Viro. CC: Neil Horman <nhorman@tuxdriver.com> Reported-by:
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Jason Wang authored
We drop packet unconditionally when we fail to mirror it. This is not intended in some cases. Consdier for kvm guest, we may mirror the traffic of the bridge to a tap device used by a VM. When kernel fails to mirror the packet in conditions such as when qemu crashes or stop polling the tap, it's hard for the management software to detect such condition and clean the the mirroring before. This would lead all packets to the bridge to be dropped and break the netowrk of other virtual machines. To solve the issue, the patch does not drop packets when kernel fails to mirror it, and only drop the redirected packets. Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by:
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Mathias Krause authored
The implementation of dev_ifconf() for the compat ioctl interface uses an intermediate ifc structure allocated in userland for the duration of the syscall. Though, it fails to initialize the padding bytes inserted for alignment and that for leaks four bytes of kernel stack. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
Mathias Krause <minipli@googlemail.com> Signed-off-by:
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Mathias Krause authored
If at least one of CONFIG_IP_VS_PROTO_TCP or CONFIG_IP_VS_PROTO_UDP is not set, __ip_vs_get_timeouts() does not fully initialize the structure that gets copied to userland and that for leaks up to 12 bytes of kernel stack. Add an explicit memset(0) before passing the structure to __ip_vs_get_timeouts() to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The CCID3 code fails to initialize the trailing padding bytes of struct tfrc_tx_info added for alignment on 64 bit architectures. It that for potentially leaks four bytes kernel stack via the getsockopt() syscall. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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Mathias Krause authored
ccid_hc_rx_getsockopt() and ccid_hc_tx_getsockopt() might be called with a NULL ccid pointer leading to a NULL pointer dereference. This could lead to a privilege escalation if the attacker is able to map page 0 and prepare it with a fake ccid_ops pointer. Signed-off-by:
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Mathias Krause authored
The LLC code wrongly returns 0, i.e. "success", when the socket is zapped. Together with the uninitialized uaddrlen pointer argument from sys_getsockname this leads to an arbitrary memory leak of up to 128 bytes kernel stack via the getsockname() syscall. Return an error instead when the socket is zapped to prevent the info leak. Also remove the unnecessary memset(0). We don't directly write to the memory pointed by uaddr but memcpy() a local structure at the end of the function that is properly initialized. Signed-off-by:
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Mathias Krause authored
The L2TP code for IPv6 fails to initialize the l2tp_unused member of struct sockaddr_l2tpip6 and that for leaks two bytes kernel stack via the getsockname() syscall. Initialize l2tp_unused with 0 to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The L2CAP code fails to initialize the l2_bdaddr_type member of struct sockaddr_l2 and the padding byte added for alignment. It that for leaks two bytes kernel stack via the getsockname() syscall. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The RFCOMM code fails to initialize the trailing padding byte of struct sockaddr_rc added for alignment. It that for leaks one byte kernel stack via the getsockname() syscall. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The RFCOMM code fails to initialize the two padding bytes of struct rfcomm_dev_list_req inserted for alignment before copying it to userland. Additionally there are two padding bytes in each instance of struct rfcomm_dev_info. The ioctl() that for disclosures two bytes plus dev_num times two bytes uninitialized kernel heap memory. Allocate the memory using kzalloc() to fix this issue. Signed-off-by:
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Mathias Krause authored
The RFCOMM code fails to initialize the key_size member of struct bt_security before copying it to userland -- that for leaking one byte kernel stack. Initialize key_size with 0 to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The HCI code fails to initialize the hci_channel member of struct sockaddr_hci and that for leaks two bytes kernel stack via the getsockname() syscall. Initialize hci_channel with 0 to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The HCI code fails to initialize the two padding bytes of struct hci_ufilter before copying it to userland -- that for leaking two bytes kernel stack. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The ATM code fails to initialize the two padding bytes of struct sockaddr_atmpvc inserted for alignment. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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Mathias Krause authored
The ATM code fails to initialize the two padding bytes of struct sockaddr_atmpvc inserted for alignment. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by:
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- 15 Aug, 2012 6 commits
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Steve Hodgson authored
dev_open() can complete before register_netdev() returns. Fix vmxnet3_probe_device() to support this. Signed-off-by:
Steve Hodgson <steve@purestorage.com> Signed-off-by:
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Stephen Hemminger authored
Alternative solution for problem found by Linux Driver Verification project (linuxtesting.org). As it noted in the comment before the br_handle_frame_finish function, this function should be called under rcu_read_lock. The problem callgraph: br_dev_xmit -> br_nf_pre_routing_finish_bridge_slow -> -> br_handle_frame_finish -> br_port_get_rcu -> rcu_dereference And in this case there is no read-lock section. Reported-by:
Denis Efremov <yefremov.denis@gmail.com> Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirelessDavid S. Miller authored
John W. Linville says: ==================== Alexey Khoroshilov provides a potential memory leak in rndis_wlan. Bob Copeland gives us an ath5k fix for a lockdep problem. Dan Carpenter fixes a signedness mismatch in at76c50x. Felix Fietkau corrects a regression caused by an earlier commit that can lead to an IRQ storm. Lorenzo Bianconi offers a fix for a bad variable initialization in ath9k that can cause it to improperly mark decrypted frames. Rajkumar Manoharan fixes ath9k to prevent the btcoex time from running when the hardware is asleep. The remainder are Bluetooth fixes, about which Gustavo says: "Here goes some fixes for 3.6-rc1, there are a few fix to thte inquiry code by Ram Malovany, support for 2 new devices, and few others fixes for NULL dereference, possible deadlock and a memory leak." ==================== Signed-off-by: -
Ben Hutchings authored
Cong Wang reports that lockdep detected suspicious RCU usage while enabling IPV6 forwarding: [ 1123.310275] =============================== [ 1123.442202] [ INFO: suspicious RCU usage. ] [ 1123.558207] 3.6.0-rc1+ #109 Not tainted [ 1123.665204] ------------------------------- [ 1123.768254] include/linux/rcupdate.h:430 Illegal context switch in RCU read-side critical section! [ 1123.992320] [ 1123.992320] other info that might help us debug this: [ 1123.992320] [ 1124.307382] [ 1124.307382] rcu_scheduler_active = 1, debug_locks = 0 [ 1124.522220] 2 locks held by sysctl/5710: [ 1124.648364] #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff81768498>] rtnl_trylock+0x15/0x17 [ 1124.882211] #1: (rcu_read_lock){.+.+.+}, at: [<ffffffff81871df8>] rcu_lock_acquire+0x0/0x29 [ 1125.085209] [ 1125.085209] stack backtrace: [ 1125.332213] Pid: 5710, comm: sysctl Not tainted 3.6.0-rc1+ #109 [ 1125.441291] Call Trace: [ 1125.545281] [<ffffffff8109d915>] lockdep_rcu_suspicious+0x109/0x112 [ 1125.667212] [<ffffffff8107c240>] rcu_preempt_sleep_check+0x45/0x47 [ 1125.781838] [<ffffffff8107c260>] __might_sleep+0x1e/0x19b [...] [ 1127.445223] [<ffffffff81757ac5>] call_netdevice_notifiers+0x4a/0x4f [...] [ 1127.772188] [<ffffffff8175e125>] dev_disable_lro+0x32/0x6b [ 1127.885174] [<ffffffff81872d26>] dev_forward_change+0x30/0xcb [ 1128.013214] [<ffffffff818738c4>] addrconf_forward_change+0x85/0xc5 [...] addrconf_forward_change() uses RCU iteration over the netdev list, which is unnecessary since it already holds the RTNL lock. We also cannot reasonably require netdevice notifier functions not to sleep. Reported-by:Cong Wang <amwang@redhat.com> Signed-off-by:
Ben Hutchings <bhutchings@solarflare.com> Signed-off-by:
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Julia Lawall authored
Convert a 0 error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // </smpl> Signed-off-by:
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Julia Lawall authored
Convert a 0 error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // </smpl> Signed-off-by:
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- 14 Aug, 2012 7 commits
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Julia Lawall authored
If the NULL test is necessary, the initialization involving a dereference of the tested value should be moved after the NULL test. The sematic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ type T; expression E; identifier i,fld; statement S; @@ - T i = E->fld; + T i; ... when != E when != i if (E == NULL) S + i = E->fld; // </smpl> Signed-off-by:
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Ben Hutchings authored
When registering the handlers, any state they rely on must be completely initialised first. When unregistering, we must wait until they are definitely no longer running. llc_rcv() must also avoid reading the handler pointers again after checking for NULL. Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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Ben Hutchings authored
Otherwise the station packet handler will remain registered even though the module is unloaded. Signed-off-by:
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Ben Hutchings authored
llc_station_init() creates and processes an event skb with no effect other than to change the state from DOWN to UP. Allocation failure is reported, but then ignored by its caller, llc2_init(). Remove this possibility by simply initialising the state as UP. Signed-off-by:
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Igor Maravic authored
Fix error handling in case making of dir dev_snmp6 failes Signed-off-by:
Igor Maravic <igorm@etf.rs> Signed-off-by:
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Yan, Zheng authored
Commit caacf05e causes big drop of UDP loop back performance. The cause of the regression is that we do not cache the local output routes. Each time we send a datagram from unconnected UDP socket, the kernel allocates a dst_entry and adds it to the rt_uncached_list. It creates lock contention on the rt_uncached_lock. Reported-by:
Alex Shi <alex.shi@intel.com> Signed-off-by:
Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by:
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Bjørn Mork authored
Signed-off-by:
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