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2010-10-15De-pessimize rds_page_copy_userLinus Torvalds1-20/+7
Don't try to "optimize" rds_page_copy_user() by using kmap_atomic() and the unsafe atomic user mode accessor functions. It's actually slower than the straightforward code on any reasonable modern CPU. Back when the code was written (although probably not by the time it was actually merged, though), 32-bit x86 may have been the dominant architecture. And there kmap_atomic() can be a lot faster than kmap() (unless you have very good locality, in which case the virtual address caching by kmap() can overcome all the downsides). But these days, x86-64 may not be more populous, but it's getting there (and if you care about performance, it's definitely already there - you'd have upgraded your CPU's already in the last few years). And on x86-64, the non-kmap_atomic() version is faster, simply because the code is simpler and doesn't have the "re-try page fault" case. People with old hardware are not likely to care about RDS anyway, and the optimization for the 32-bit case is simply buggy, since it doesn't verify the user addresses properly. Reported-by: Dan Rosenberg <drosenberg@vsecurity.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-11net: clear heap allocations for privileged ethtool actionsKees Cook1-3/+3
Several other ethtool functions leave heap uncleared (potentially) by drivers. Some interfaces appear safe (eeprom, etc), in that the sizes are well controlled. In some situations (e.g. unchecked error conditions), the heap will remain unchanged in areas before copying back to userspace. Note that these are less of an issue since these all require CAP_NET_ADMIN. Cc: stable@kernel.org Signed-off-by: Kees Cook <kees.cook@canonical.com> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-11ATM: mpc, fix use after freeJiri Slaby1-1/+1
Stanse found that mpc_push frees skb and then it dereferences it. It is a typo, new_skb should be dereferenced there. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-08net: clear heap allocation for ETHTOOL_GRXCLSRLALLKees Cook1-1/+1
Calling ETHTOOL_GRXCLSRLALL with a large rule_cnt will allocate kernel heap without clearing it. For the one driver (niu) that implements it, it will leave the unused portion of heap unchanged and copy the full contents back to userspace. Signed-off-by: Kees Cook <kees.cook@canonical.com> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-08Merge branch 'master' of ↵David S. Miller2-2/+4
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2010-10-07Revert "mac80211: use netif_receive_skb in ieee80211_tx_status callpath"John W. Linville1-2/+2
This reverts commit 5ed3bc7288487bd4f891f420a07319e0b538b4fe. It turns-out that not all drivers are calling ieee80211_tx_status from a compatible context. Revert this for now and try again later... Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-10-07Merge branch 'master' of ↵David S. Miller2-33/+33
git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6
2010-10-06Merge branch 'master' of ↵David S. Miller8-88/+110
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2010-10-06mac80211: delete AddBA response timerJohannes Berg1-0/+2
We never delete the addBA response timer, which is typically fine, but if the station it belongs to is deleted very quickly after starting the BA session, before the peer had a chance to reply, the timer may fire after the station struct has been freed already. Therefore, we need to delete the timer in a suitable spot -- best when the session is being stopped (which will happen even then) in which case the delete will be a no-op most of the time. I've reproduced the scenario and tested the fix. This fixes the crash reported at http://mid.gmane.org/4CAB6F96.6090701@candelatech.com Cc: stable@kernel.org Reported-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-10-05caif: fix two caif_connect() bugsEric Dumazet1-6/+15
caif_connect() might dereference a netdevice after dev_put() it. It also doesnt check dev_get_by_index() return value and could dereference a NULL pointer. Fix it, using RCU to avoid taking a reference. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05cls_u32: signedness bugDan Carpenter1-1/+1
skb_headroom() is unsigned so "skb_headroom(skb) + toff" is also unsigned and can't be less than zero. This test was added in 66d50d25: "u32: negative offset fix" It was supposed to fix a regression. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-04Bluetooth: Disallow to change L2CAP_OPTIONS values when connectedGustavo F. Padovan1-0/+5
L2CAP doesn't permit change like MTU, FCS, TxWindow values while the connection is alive, we can only set that before the connection/configuration process. That can lead to bugs in the L2CAP operation. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-10-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds5-19/+27
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: vlan: dont drop packets from unknown vlans in promiscuous mode Phonet: Correct header retrieval after pskb_may_pull um: Proper Fix for f25c80a4: remove duplicate structure field initialization ip_gre: Fix dependencies wrt. ipv6. net-2.6: SYN retransmits: Add new parameter to retransmits_timed_out() iwl3945: queue the right work if the scan needs to be aborted mac80211: fix use-after-free
2010-10-03sctp: Fix out-of-bounds reading in sctp_asoc_get_hmac()Dan Rosenberg1-2/+6
The sctp_asoc_get_hmac() function iterates through a peer's hmac_ids array and attempts to ensure that only a supported hmac entry is returned. The current code fails to do this properly - if the last id in the array is out of range (greater than SCTP_AUTH_HMAC_ID_MAX), the id integer remains set after exiting the loop, and the address of an out-of-bounds entry will be returned and subsequently used in the parent function, causing potentially ugly memory corruption. This patch resets the id integer to 0 on encountering an invalid id so that NULL will be returned after finishing the loop if no valid ids are found. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03sctp: prevent reading out-of-bounds memoryDan Rosenberg1-1/+12
Two user-controlled allocations in SCTP are subsequently dereferenced as sockaddr structs, without checking if the dereferenced struct members fall beyond the end of the allocated chunk. There doesn't appear to be any information leakage here based on how these members are used and additional checking, but it's still worth fixing. [akpm@linux-foundation.org: remove unfashionable newlines, fix gmail tab->space conversion] Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03ipv4: correct IGMP behavior on v3 query during v2-compatibility modeDavid Stevens1-1/+13
A recent patch to allow IGMPv2 responses to IGMPv3 queries bypasses length checks for valid query lengths, incorrectly resets the v2_seen timer, and does not support IGMPv1. The following patch responds with a v2 report as required by IGMPv2 while correcting the other problems introduced by the patch. Signed-Off-By: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03Revert "ipv4: Make INET_LRO a bool instead of tristate."Ben Hutchings1-1/+1
This reverts commit e81963b180ac502fda0326edf059b1e29cdef1a2. LRO is now deprecated in favour of GRO, and only a few drivers use it, so it is desirable to build it as a module in distribution kernels. The original change to prevent building it as a module was made in an attempt to avoid the case where some dependents are set to y and some to m, and INET_LRO can be set to m rather than y. However, the Kconfig system will reliably set INET_LRO=y in this case. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03net: Fix the condition passed to sk_wait_event()Nagendra Tomar1-4/+4
This patch fixes the condition (3rd arg) passed to sk_wait_event() in sk_stream_wait_memory(). The incorrect check in sk_stream_wait_memory() causes the following soft lockup in tcp_sendmsg() when the global tcp memory pool has exhausted. >>> snip <<< localhost kernel: BUG: soft lockup - CPU#3 stuck for 11s! [sshd:6429] localhost kernel: CPU 3: localhost kernel: RIP: 0010:[sk_stream_wait_memory+0xcd/0x200] [sk_stream_wait_memory+0xcd/0x200] sk_stream_wait_memory+0xcd/0x200 localhost kernel: localhost kernel: Call Trace: localhost kernel: [sk_stream_wait_memory+0x1b1/0x200] sk_stream_wait_memory+0x1b1/0x200 localhost kernel: [<ffffffff802557c0>] autoremove_wake_function+0x0/0x40 localhost kernel: [ipv6:tcp_sendmsg+0x6e6/0xe90] tcp_sendmsg+0x6e6/0xce0 localhost kernel: [sock_aio_write+0x126/0x140] sock_aio_write+0x126/0x140 localhost kernel: [xfs:do_sync_write+0xf1/0x130] do_sync_write+0xf1/0x130 localhost kernel: [<ffffffff802557c0>] autoremove_wake_function+0x0/0x40 localhost kernel: [hrtimer_start+0xe3/0x170] hrtimer_start+0xe3/0x170 localhost kernel: [vfs_write+0x185/0x190] vfs_write+0x185/0x190 localhost kernel: [sys_write+0x50/0x90] sys_write+0x50/0x90 localhost kernel: [system_call+0x7e/0x83] system_call+0x7e/0x83 >>> snip <<< What is happening is, that the sk_wait_event() condition passed from sk_stream_wait_memory() evaluates to true for the case of tcp global memory exhaustion. This is because both sk_stream_memory_free() and vm_wait are true which causes sk_wait_event() to *not* call schedule_timeout(). Hence sk_stream_wait_memory() returns immediately to the caller w/o sleeping. This causes the caller to again try allocation, which again fails and again calls sk_stream_wait_memory(), and so on. [ Bug introduced by commit c1cbe4b7ad0bc4b1d98ea708a3fecb7362aa4088 ("[NET]: Avoid atomic xchg() for non-error case") -DaveM ] Signed-off-by: Nagendra Singh Tomar <tomer_iisc@yahoo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03net: Fix IPv6 PMTU disc. w/ asymmetric routesMaciej Żenczykowski1-4/+24
Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-30vlan: dont drop packets from unknown vlans in promiscuous modeEric Dumazet1-4/+10
Roger Luethi noticed packets for unknown VLANs getting silently dropped even in promiscuous mode. Check for promiscuous mode in __vlan_hwaccel_rx() and vlan_gro_common() before drops. As suggested by Patrick, mark such packets to have skb->pkt_type set to PACKET_OTHERHOST to make sure they are dropped by IP stack. Reported-by: Roger Luethi <rl@hellgate.ch> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-30Merge branch 'master' of ↵David S. Miller1-4/+0
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2010-09-30Revert "Bluetooth: Don't accept ConfigReq if we aren't in the BT_CONFIG state"Gustavo F. Padovan1-7/+1
This reverts commit 8cb8e6f1684be13b51f8429b15f39c140326b327. That commit introduced a regression with the Bluetooth Profile Tuning Suite(PTS), Reverting this make sure that L2CAP is in a qualificable state. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-09-30Bluetooth: Fix inconsistent lock state with RFCOMMGustavo F. Padovan1-0/+4
When receiving a rfcomm connection with the old dund deamon a inconsistent lock state happens. That's because interrupts were already disabled by l2cap_conn_start() when rfcomm_sk_state_change() try to lock the spin_lock. As result we may have a inconsistent lock state for l2cap_conn_start() after rfcomm_sk_state_change() calls bh_lock_sock() and disable interrupts as well. [ 2833.151999] [ 2833.151999] ================================= [ 2833.151999] [ INFO: inconsistent lock state ] [ 2833.151999] 2.6.36-rc3 #2 [ 2833.151999] --------------------------------- [ 2833.151999] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. [ 2833.151999] krfcommd/2306 [HC0[0]:SC0[0]:HE1:SE1] takes: [ 2833.151999] (slock-AF_BLUETOOTH){+.?...}, at: [<ffffffffa00bcb56>] rfcomm_sk_state_change+0x46/0x170 [rfcomm] [ 2833.151999] {IN-SOFTIRQ-W} state was registered at: [ 2833.151999] [<ffffffff81094346>] __lock_acquire+0x5b6/0x1560 [ 2833.151999] [<ffffffff8109534a>] lock_acquire+0x5a/0x70 [ 2833.151999] [<ffffffff81392b6c>] _raw_spin_lock+0x2c/0x40 [ 2833.151999] [<ffffffffa00a5092>] l2cap_conn_start+0x92/0x640 [l2cap] [ 2833.151999] [<ffffffffa00a6a3f>] l2cap_sig_channel+0x6bf/0x1320 [l2cap] [ 2833.151999] [<ffffffffa00a9173>] l2cap_recv_frame+0x133/0x770 [l2cap] [ 2833.151999] [<ffffffffa00a997b>] l2cap_recv_acldata+0x1cb/0x390 [l2cap] [ 2833.151999] [<ffffffffa000db4b>] hci_rx_task+0x2ab/0x450 [bluetooth] [ 2833.151999] [<ffffffff8106b22b>] tasklet_action+0xcb/0xe0 [ 2833.151999] [<ffffffff8106b91e>] __do_softirq+0xae/0x150 [ 2833.151999] [<ffffffff8102bc0c>] call_softirq+0x1c/0x30 [ 2833.151999] [<ffffffff8102ddb5>] do_softirq+0x75/0xb0 [ 2833.151999] [<ffffffff8106b56d>] irq_exit+0x8d/0xa0 [ 2833.151999] [<ffffffff8104484b>] smp_apic_timer_interrupt+0x6b/0xa0 [ 2833.151999] [<ffffffff8102b6d3>] apic_timer_interrupt+0x13/0x20 [ 2833.151999] [<ffffffff81029dfa>] cpu_idle+0x5a/0xb0 [ 2833.151999] [<ffffffff81381ded>] rest_init+0xad/0xc0 [ 2833.151999] [<ffffffff817ebc4d>] start_kernel+0x2dd/0x2e8 [ 2833.151999] [<ffffffff817eb2e6>] x86_64_start_reservations+0xf6/0xfa [ 2833.151999] [<ffffffff817eb3ce>] x86_64_start_kernel+0xe4/0xeb [ 2833.151999] irq event stamp: 731 [ 2833.151999] hardirqs last enabled at (731): [<ffffffff8106b762>] local_bh_enable_ip+0x82/0xe0 [ 2833.151999] hardirqs last disabled at (729): [<ffffffff8106b93e>] __do_softirq+0xce/0x150 [ 2833.151999] softirqs last enabled at (730): [<ffffffff8106b96e>] __do_softirq+0xfe/0x150 [ 2833.151999] softirqs last disabled at (711): [<ffffffff8102bc0c>] call_softirq+0x1c/0x30 [ 2833.151999] [ 2833.151999] other info that might help us debug this: [ 2833.151999] 2 locks held by krfcommd/2306: [ 2833.151999] #0: (rfcomm_mutex){+.+.+.}, at: [<ffffffffa00bb744>] rfcomm_run+0x174/0xb20 [rfcomm] [ 2833.151999] #1: (&(&d->lock)->rlock){+.+...}, at: [<ffffffffa00b9223>] rfcomm_dlc_accept+0x53/0x100 [rfcomm] [ 2833.151999] [ 2833.151999] stack backtrace: [ 2833.151999] Pid: 2306, comm: krfcommd Tainted: G W 2.6.36-rc3 #2 [ 2833.151999] Call Trace: [ 2833.151999] [<ffffffff810928e1>] print_usage_bug+0x171/0x180 [ 2833.151999] [<ffffffff810936c3>] mark_lock+0x333/0x400 [ 2833.151999] [<ffffffff810943ca>] __lock_acquire+0x63a/0x1560 [ 2833.151999] [<ffffffff810948b5>] ? __lock_acquire+0xb25/0x1560 [ 2833.151999] [<ffffffff8109534a>] lock_acquire+0x5a/0x70 [ 2833.151999] [<ffffffffa00bcb56>] ? rfcomm_sk_state_change+0x46/0x170 [rfcomm] [ 2833.151999] [<ffffffff81392b6c>] _raw_spin_lock+0x2c/0x40 [ 2833.151999] [<ffffffffa00bcb56>] ? rfcomm_sk_state_change+0x46/0x170 [rfcomm] [ 2833.151999] [<ffffffffa00bcb56>] rfcomm_sk_state_change+0x46/0x170 [rfcomm] [ 2833.151999] [<ffffffffa00b9239>] rfcomm_dlc_accept+0x69/0x100 [rfcomm] [ 2833.151999] [<ffffffffa00b9a49>] rfcomm_check_accept+0x59/0xd0 [rfcomm] [ 2833.151999] [<ffffffffa00bacab>] rfcomm_recv_frame+0x9fb/0x1320 [rfcomm] [ 2833.151999] [<ffffffff813932bb>] ? _raw_spin_unlock_irqrestore+0x3b/0x60 [ 2833.151999] [<ffffffff81093acd>] ? trace_hardirqs_on_caller+0x13d/0x180 [ 2833.151999] [<ffffffff81093b1d>] ? trace_hardirqs_on+0xd/0x10 [ 2833.151999] [<ffffffffa00bb7f1>] rfcomm_run+0x221/0xb20 [rfcomm] [ 2833.151999] [<ffffffff813905e7>] ? schedule+0x287/0x780 [ 2833.151999] [<ffffffffa00bb5d0>] ? rfcomm_run+0x0/0xb20 [rfcomm] [ 2833.151999] [<ffffffff81081026>] kthread+0x96/0xa0 [ 2833.151999] [<ffffffff8102bb14>] kernel_thread_helper+0x4/0x10 [ 2833.151999] [<ffffffff813936bc>] ? restore_args+0x0/0x30 [ 2833.151999] [<ffffffff81080f90>] ? kthread+0x0/0xa0 [ 2833.151999] [<ffffffff8102bb10>] ? kernel_thread_helper+0x0/0x10 Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-09-30Bluetooth: Simplify L2CAP Streaming mode sendingGustavo F. Padovan1-17/+7
As we don't have any error control on the Streaming mode, i.e., we don't need to keep a copy of the skb for later resending we don't need to call skb_clone() on it. Then we can go one further here, and dequeue the skb before sending it, that also means we don't need to look to sk->sk_send_head anymore. The patch saves memory and time when sending Streaming mode data, so it is good to mainline. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-09-30Bluetooth: fix MTU L2CAP configuration parameterAndrei Emeltchenko1-3/+3
When receiving L2CAP negative configuration response with respect to MTU parameter we modify wrong field. MTU here means proposed value of MTU that the remote device intends to transmit. So for local L2CAP socket it is pi->imtu. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com> Acked-by: Ville Tervo <ville.tervo@nokia.com> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-09-30Bluetooth: Only enable L2CAP FCS for ERTM or streamingMat Martineau1-6/+13
This fixes a bug which caused the FCS setting to show L2CAP_FCS_CRC16 with L2CAP modes other than ERTM or streaming. At present, this only affects the FCS value shown with getsockopt() for basic mode. Signed-off-by: Mat Martineau <mathewm@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-09-29Phonet: Correct header retrieval after pskb_may_pullKumar Sanghvi1-1/+2
Retrieve the header after doing pskb_may_pull since, pskb_may_pull could change the buffer structure. This is based on the comment given by Eric Dumazet on Phonet Pipe controller patch for a similar problem. Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-28ip_gre: Fix dependencies wrt. ipv6.David S. Miller1-0/+1
The GRE tunnel driver needs to invoke icmpv6 helpers in the ipv6 stack when ipv6 support is enabled. Therefore if IPV6 is enabled, we have to enforce that GRE's enabling (modular or static) matches that of ipv6. Reported-by: Patrick McHardy <kaber@trash.net> Reported-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-28net-2.6: SYN retransmits: Add new parameter to retransmits_timed_out()Damian Lukowski1-10/+14
Fixes kernel Bugzilla Bug 18952 This patch adds a syn_set parameter to the retransmits_timed_out() routine and updates its callers. If not set, TCP_RTO_MIN is taken as the calculation basis as before. If set, TCP_TIMEOUT_INIT is used instead, so that sysctl_syn_retries represents the actual amount of SYN retransmissions in case no SYNACKs are received when establishing a new connection. Signed-off-by: Damian Lukowski <damian@tvk.rwth-aachen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds31-122/+176
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (47 commits) tcp: Fix >4GB writes on 64-bit. net/9p: Mount only matching virtio channels de2104x: fix ethtool tproxy: check for transparent flag in ip_route_newports ipv6: add IPv6 to neighbour table overflow warning tcp: fix TSO FACK loss marking in tcp_mark_head_lost 3c59x: fix regression from patch "Add ethtool WOL support" ipv6: add a missing unregister_pernet_subsys call s390: use free_netdev(netdev) instead of kfree() sgiseeq: use free_netdev(netdev) instead of kfree() rionet: use free_netdev(netdev) instead of kfree() ibm_newemac: use free_netdev(netdev) instead of kfree() smsc911x: Add MODULE_ALIAS() net: reset skb queue mapping when rx'ing over tunnel br2684: fix scheduling while atomic de2104x: fix TP link detection de2104x: fix power management de2104x: disable autonegotiation on broken hardware net: fix a lockdep splat e1000e: 82579 do not gate auto config of PHY by hardware during nominal use ...
2010-09-27tcp: Fix >4GB writes on 64-bit.David S. Miller2-3/+4
Fixes kernel bugzilla #16603 tcp_sendmsg() truncates iov_len to an 'int' which a 4GB write to write zero bytes, for example. There is also the problem higher up of how verify_iovec() works. It wants to prevent the total length from looking like an error return value. However it does this using 'int', but syscalls return 'long' (and thus signed 64-bit on 64-bit machines). So it could trigger false-positives on 64-bit as written. So fix it to use 'long'. Reported-by: Olaf Bonorden <bono@onlinehome.de> Reported-by: Daniel Büse <dbuese@gmx.de> Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-27net/9p: Mount only matching virtio channelsSven Eckelmann1-1/+2
p9_virtio_create will only compare the the channel's tag characters against the device name till the end of the channel's tag but not till the end of the device name. This means that if a user defines channels with the tags foo and foobar then he would mount foo when he requested foonot and may mount foo when he requested foobar. Thus it is necessary to check both string lengths against each other in case of a successful partial string match. Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-27ipv6: add IPv6 to neighbour table overflow warningUlrich Weber2-2/+2
IPv4 and IPv6 have separate neighbour tables, so the warning messages should be distinguishable. [ Add a suitable message prefix on the ipv4 side as well -DaveM ] Signed-off-by: Ulrich Weber <uweber@astaro.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-27tcp: fix TSO FACK loss marking in tcp_mark_head_lostYuchung Cheng1-1/+2
When TCP uses FACK algorithm to mark lost packets in tcp_mark_head_lost(), if the number of packets in the (TSO) skb is greater than the number of packets that should be marked lost, TCP incorrectly exits the loop and marks no packets lost in the skb. This underestimates tp->lost_out and affects the recovery/retransmission. This patch fargments the skb and marks the correct amount of packets lost. Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-27net/9p: fix memory handling/allocation in rdma_request()Davidlohr Bueso1-11/+18
Return -ENOMEM when erroring on kmalloc and fix memory leaks when returning on error. Signed-off-by: Davidlohr Bueso <dave@gnu.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2010-09-26ipv6: add a missing unregister_pernet_subsys callNeil Horman2-3/+13
Clean up a missing exit path in the ipv6 module init routines. In addrconf_init we call ipv6_addr_label_init which calls register_pernet_subsys for the ipv6_addr_label_ops structure. But if module loading fails, or if the ipv6 module is removed, there is no corresponding unregister_pernet_subsys call, which leaves a now-bogus address on the pernet_list, leading to oopses in subsequent registrations. This patch cleans up both the failed load path and the unload path. Tested by myself with good results. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> include/net/addrconf.h | 1 + net/ipv6/addrconf.c | 11 ++++++++--- net/ipv6/addrlabel.c | 5 +++++ 3 files changed, 14 insertions(+), 3 deletions(-) Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-26br2684: fix scheduling while atomicKarl Hiramoto1-10/+2
You can't call atomic_notifier_chain_unregister() while in atomic context. Fix, call un/register_atmdevice_notifier in module __init and __exit. Bug report: http://comments.gmane.org/gmane.linux.network/172603 Reported-by: Mikko Vinni <mmvinni@yahoo.com> Tested-by: Mikko Vinni <mmvinni@yahoo.com> Signed-off-by: Karl Hiramoto <karl@hiramoto.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-24net: fix a lockdep splatEric Dumazet6-26/+26
We have for each socket : One spinlock (sk_slock.slock) One rwlock (sk_callback_lock) Possible scenarios are : (A) (this is used in net/sunrpc/xprtsock.c) read_lock(&sk->sk_callback_lock) (without blocking BH) <BH> spin_lock(&sk->sk_slock.slock); ... read_lock(&sk->sk_callback_lock); ... (B) write_lock_bh(&sk->sk_callback_lock) stuff write_unlock_bh(&sk->sk_callback_lock) (C) spin_lock_bh(&sk->sk_slock) ... write_lock_bh(&sk->sk_callback_lock) stuff write_unlock_bh(&sk->sk_callback_lock) spin_unlock_bh(&sk->sk_slock) This (C) case conflicts with (A) : CPU1 [A] CPU2 [C] read_lock(callback_lock) <BH> spin_lock_bh(slock) <wait to spin_lock(slock)> <wait to write_lock_bh(callback_lock)> We have one problematic (C) use case in inet_csk_listen_stop() : local_bh_disable(); bh_lock_sock(child); // spin_lock_bh(&sk->sk_slock) WARN_ON(sock_owned_by_user(child)); ... sock_orphan(child); // write_lock_bh(&sk->sk_callback_lock) lockdep is not happy with this, as reported by Tetsuo Handa It seems only way to deal with this is to use read_lock_bh(callbacklock) everywhere. Thanks to Jarek for pointing a bug in my first attempt and suggesting this solution. Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Jarek Poplawski <jarkao2@gmail.com> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-24mac80211: fix use-after-freeJohannes Berg1-4/+0
commit 8c0c709eea5cbab97fb464cd68b06f24acc58ee1 Author: Johannes Berg <johannes@sipsolutions.net> Date: Wed Nov 25 17:46:15 2009 +0100 mac80211: move cmntr flag out of rx flags moved the CMTR flag into the skb's status, and in doing so introduced a use-after-free -- when the skb has been handed to cooked monitors the status setting will touch now invalid memory. Additionally, moving it there has effectively discarded the optimisation -- since the bit is only ever set on freed SKBs, and those were a copy, it could never be checked. For the current release, fixing this properly is a bit too involved, so let's just remove the problematic code and leave userspace with one copy of each frame for each virtual interface. Cc: stable@kernel.org [2.6.33+] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-09-22xfrm4: strip ECN bits from tos fieldUlrich Weber1-1/+1
otherwise ECT(1) bit will get interpreted as RTO_ONLINK and routing will fail with XfrmOutBundleGenError. Signed-off-by: Ulrich Weber <uweber@astaro.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: nf_conntrack_defrag: check socket type before touching nodefrag flagJiri Olsa1-1/+3
we need to check proper socket type within ipv4_conntrack_defrag function before referencing the nodefrag flag. For example the tun driver receive path produces skbs with AF_UNSPEC socket type, and so current code is causing unwanted fragmented packets going out. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: nf_nat_snmp: fix checksum calculation (v4)Patrick McHardy1-2/+4
Fix checksum calculation in nf_nat_snmp_basic. Based on patches by Clark Wang <wtweeker@163.com> and Stephen Hemminger <shemminger@vyatta.com>. https://bugzilla.kernel.org/show_bug.cgi?id=17622 Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: fix a race in nf_ct_ext_create()Eric Dumazet1-1/+3
As soon as rcu_read_unlock() is called, there is no guarantee current thread can safely derefence t pointer, rcu protected. Fix is to copy t->alloc_size in a temporary variable. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: fix ipt_REJECT TCP RST routing for indev == outdevChangli Gao1-0/+1
ip_route_me_harder can't create the route cache when the outdev is the same with the indev for the skbs whichout a valid protocol set. __mkroute_input functions has this check: 1998 if (skb->protocol != htons(ETH_P_IP)) { 1999 /* Not IP (i.e. ARP). Do not create route, if it is 2000 * invalid for proxy arp. DNAT routes are always valid. 2001 * 2002 * Proxy arp feature have been extended to allow, ARP 2003 * replies back to the same interface, to support 2004 * Private VLAN switch technologies. See arp.c. 2005 */ 2006 if (out_dev == in_dev && 2007 IN_DEV_PROXY_ARP_PVLAN(in_dev) == 0) { 2008 err = -EINVAL; 2009 goto cleanup; 2010 } 2011 } This patch gives the new skb a valid protocol to bypass this check. In order to make ipt_REJECT work with bridges, you also need to enable ip_forward. This patch also fixes a regression. When we used skb_copy_expand(), we didn't have this issue stated above, as the protocol was properly set. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: nf_ct_sip: default to NF_ACCEPT in sip_help_tcp()Simon Horman1-1/+1
I initially noticed this because of the compiler warning below, but it does seem to be a valid concern in the case where ct_sip_get_header() returns 0 in the first iteration of the while loop. net/netfilter/nf_conntrack_sip.c: In function 'sip_help_tcp': net/netfilter/nf_conntrack_sip.c:1379: warning: 'ret' may be used uninitialized in this function Signed-off-by: Simon Horman <horms@verge.net.au> [Patrick: changed NF_DROP to NF_ACCEPT] Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22netfilter: tproxy: nf_tproxy_assign_sock() can handle tw socketsEric Dumazet1-1/+5
transparent field of a socket is either inet_twsk(sk)->tw_transparent for timewait sockets, or inet_sk(sk)->transparent for other sockets (TCP/UDP). Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-21ip: fix truesize mismatch in ip fragmentationEric Dumazet2-11/+26
Special care should be taken when slow path is hit in ip_fragment() : When walking through frags, we transfert truesize ownership from skb to frags. Then if we hit a slow_path condition, we must undo this or risk uncharging frags->truesize twice, and in the end, having negative socket sk_wmem_alloc counter, or even freeing socket sooner than expected. Many thanks to Nick Bowler, who provided a very clean bug report and test program. Thanks to Jarek for reviewing my first patch and providing a V2 While Nick bisection pointed to commit 2b85a34e911 (net: No more expensive sock_hold()/sock_put() on each tx), underlying bug is older (2.6.12-rc5) A side effect is to extend work done in commit b2722b1c3a893e (ip_fragment: also adjust skb->truesize for packets not owned by a socket) to ipv6 as well. Reported-and-bisected-by: Nick Bowler <nbowler@elliptictech.com> Tested-by: Nick Bowler <nbowler@elliptictech.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Jarek Poplawski <jarkao2@gmail.com> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-21Merge branch 'master' of ↵David S. Miller1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2010-09-20tcp: Fix race in tcp_pollTom Marshall2-2/+7
If a RST comes in immediately after checking sk->sk_err, tcp_poll will return POLLIN but not POLLOUT. Fix this by checking sk->sk_err at the end of tcp_poll. Additionally, ensure the correct order of operations on SMP machines with memory barriers. Signed-off-by: Tom Marshall <tdm.code@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-20rose: Fix signedness issues wrt. digi count.David S. Miller1-2/+2
Just use explicit casts, since we really can't change the types of structures exported to userspace which have been around for 15 years or so. Reported-by: Dan Rosenberg <dan.j.rosenberg@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>

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