- 07 Sep, 2010 2 commits
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Jiri Bohac authored
The time_before_eq()/time_after_eq() functions operate on unsigned long and only work if the difference between the two compared values is smaller than half the range of unsigned long (31 bits on i386). Some of the variables (slave->jiffies, dev->trans_start, dev->last_rx) used by bonding store a copy of jiffies and may not be updated for a long time. With HZ=1000, time_before_eq()/time_after_eq() will start giving bad results after ~25 days. jiffies will never be before slave->jiffies, dev->trans_start, dev->last_rx by more than possibly a couple ticks caused by preemption of this code. This allows us to detect/prevent these overflows by replacing time_before_eq()/time_after_eq() with time_in_range(). Signed-off-by:
Jiri Bohac <jbohac@suse.cz> Signed-off-by:
Jean Delvare <jdelvare@suse.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Giuseppe Cavallaro authored
We cannot use spinlock when kmalloc is invoked with GFP_KERNEL flag because it can sleep. So this patch reviews the usage of spinlock within the stmmac_resume function avoing this bug. Signed-off-by:
Giuseppe Cavallaro <peppe.cavallaro@st.com> Reported-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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- 03 Sep, 2010 4 commits
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Li Zefan authored
Dave reported an rcu lockdep warning on 2.6.35.4 kernel task->cgroups and task->cgroups->subsys[i] are protected by RCU. So we avoid accessing invalid pointers here. This might happen, for example, when you are deref-ing those pointers while someone move @task from one cgroup to another. Reported-by:
Dave Jones <davej@redhat.com> Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Signed-off-by:
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Ajit Khaparde authored
Async notifications other than link status are possible in certain configurations. Remove the BUG_ON in the mcc completion processing path. Signed-off-by:
Ajit Khaparde <ajitk@serverengines.com> Signed-off-by:
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Ajit Khaparde authored
The ONLINE registers can return 0xFFFFFFFF on more than one occassion. On systems that care, reading these registers could lead to problems. So the new code decides that the ASIC has encountered and error by reading the UE_STATUS_LOW/HIGH registers. AND them with the mask values and a non-zero result indicates an error. Signed-off-by:
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Ajit Khaparde authored
Wrong packet statistics for multicast Rx was causing net-snmp error messages every 15 seconds. Instead of picking the multicast stats from hardware, now maintain it in the driver itself. Signed-off-by:
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- 02 Sep, 2010 6 commits
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Jarek Poplawski authored
This patch fixes a lockdep warning: [ 516.287584] ========================================================= [ 516.288386] [ INFO: possible irq lock inversion dependency detected ] [ 516.288386] 2.6.35b #7 [ 516.288386] --------------------------------------------------------- [ 516.288386] swapper/0 just changed the state of lock: [ 516.288386] (&qdisc_tx_lock){+.-...}, at: [<c12eacda>] est_timer+0x62/0x1b4 [ 516.288386] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 516.288386] (est_tree_lock){+.+...} [ 516.288386] [ 516.288386] and interrupts could create inverse lock ordering between them. ... So, est_tree_lock needs BH protection because it's taken by qdisc_tx_lock, which is used both in BH and process contexts. (Full warning with this patch at netdev, 02 Sep 2010.) Fixes commit: ae638c47 ("pkt_sched: gen_estimator: add a new lock") Signed-off-by:Jarek Poplawski <jarkao2@gmail.com> Signed-off-by:
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Julian Anastasov authored
Fix Passive FTP problem in ip_vs_ftp: - Do not oops in nf_nat_set_seq_adjust (adjust_tcp_sequence) when iptable_nat module is not loaded Signed-off-by:
Julian Anastasov <ja@ssi.bg> Signed-off-by:
Simon Horman <horms@verge.net.au> Signed-off-by:
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David S. Miller authored
This reverts commit de6be6c1. After some discussion with Jarek Poplawski and Eric Dumazet, we've decided that this change is incorrect. Signed-off-by:
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Eric Dumazet authored
Packets entering GRO might have different headrooms, even for a given flow (because of implementation details in drivers, like copybreak). We cant force drivers to deliver packets with a fixed headroom. 1) fix skb_segment() skb_segment() makes the false assumption headrooms of fragments are same than the head. When CHECKSUM_PARTIAL is used, this can give csum_start errors, and crash later in skb_copy_and_csum_dev() 2) allocate a minimal skb for head of frag_list skb_gro_receive() uses netdev_alloc_skb(headroom + skb_gro_offset(p)) to allocate a fresh skb. This adds NET_SKB_PAD to a padding already provided by netdevice, depending on various things, like copybreak. Use alloc_skb() to allocate an exact padding, to reduce cache line needs: NET_SKB_PAD + NET_IP_ALIGN bugzilla : https://bugzilla.kernel.org/show_bug.cgi?id=16626 Many thanks to Plamen Petrov, testing many debugging patches ! With help of Jarek Poplawski. Reported-by:
Plamen Petrov <pvp-lsts@fs.uni-ruse.bg> Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> CC: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by:
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David S. Miller authored
In a similar vain to commit 17762060 ("bridge: Clear IPCB before possible entry into IP stack") Any time we call into the IP stack we have to make sure the state there is as expected by the ipv4 code. With help from Eric Dumazet and Herbert Xu. Reported-by:
Bandan Das <bandan.das@stratus.com> Signed-off-by:
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Ben Hutchings authored
vortex_ioctl() was grabbing vortex_private::lock around its call to generic_mii_ioctl(). This is no longer necessary since there are more specific locks which the mdio_{read,write}() functions will obtain. Worse, those functions do not save and restore IRQ flags when locking the MII state, so interrupts will be enabled when generic_mii_ioctl() returns. Since there is currently no need for any function to call mdio_{read,write}() while holding another spinlock, do not change them to save and restore IRQ flags but remove the specification of ordering between vortex_private::lock and vortex_private::mii_lock. Signed-off-by:Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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- 01 Sep, 2010 9 commits
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stephen hemminger authored
There's something very important I forgot to tell you. What? Don't cross the GRO streams. Why? It would be bad. I'm fuzzy on the whole good/bad thing. What do you mean, "bad"? Try to imagine all the Internet as you know it stopping instantaneously and every bit in every packet swapping at the speed of light. Total packet reordering. Right. That's bad. Okay. All right. Important safety tip. Thanks, Hubert The simplest way to stop this is just avoid doing GRO on the second port. Very few Marvell boards support two ports per ring, and GRO is just an optimization. Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
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Nicolas Dichtel authored
Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
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Nicolas Dichtel authored
Attached is a small patch to remove a warning ("warning: ISO C90 forbids mixed declarations and code" with gcc 4.3.2). Signed-off-by: -
Michal Soltys authored
This patch fixes init_vf() function, so on each new backlog period parent's cl_cfmin is properly updated (including further propgation towards the root), even if the activated leaf has no upperlimit curve defined. Signed-off-by:
Michal Soltys <soltys@ziu.info> Signed-off-by:
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Denis Kirjanov authored
mdiobus resources must be released on exit Signed-off-by:
Denis Kirjanov <dkirjanov@kernel.org> Acked-by:
Dan Carpenter <error27@gmail.com> Signed-off-by:
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Jeff Mahoney authored
While reviewing commit 1c40be12, I audited other users of tc_action_ops->dump for information leaks. That commit covered almost all of them but act_police still had a leak. opt.limit and opt.capab aren't zeroed out before the structure is passed out. This patch uses the C99 initializers to zero everything unused out. Signed-off-by:
Jeff Mahoney <jeffm@suse.com> Acked-by:
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Eric Dumazet authored
Its currently illegal to call kthread_stop(NULL) Reported-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Breno Leitao authored
This change just add the IBM eHEA 10Gb network drivers as supported. Signed-off-by:
Breno Leitao <leitao@linux.vnet.ibm.com> Signed-off-by:
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- 31 Aug, 2010 5 commits
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Luis R. Rodriguez authored
The 5 GHz CTL indexes were not being read for all hardware devices due to the masking out through the CTL_MODE_M mask being one bit too short. Without this the calibrated regulatory maximum values were not being picked up when devices operate on 5 GHz in HT40 mode. The final output power used for Atheros devices is the minimum between the calibrated CTL values and what CRDA provides. Cc: stable@kernel.org [2.6.27+] Signed-off-by:
Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com>
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Luis R. Rodriguez authored
The EEPROM is compressed on AR9003, upon decompression the wrong upper limit was being used for the block which prevented the 5 GHz CTL indexes from being used, which are stored towards the end of the EEPROM block. This fix allows the actual intended regulatory limits to be used on AR9003 hardware. Cc: stable@kernel.org [2.6.36+] Signed-off-by:
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John W. Linville authored
Otherwise lockdep complains... https://bugzilla.kernel.org/show_bug.cgi?id=17311 [ INFO: possible circular locking dependency detected ] 2.6.36-rc2-git4 #12 ------------------------------------------------------- kworker/0:3/3630 is trying to acquire lock: (rtnl_mutex){+.+.+.}, at: [<ffffffff813396c7>] rtnl_lock+0x12/0x14 but task is already holding lock: (rfkill_global_mutex){+.+.+.}, at: [<ffffffffa014b129>] rfkill_switch_all+0x24/0x49 [rfkill] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rfkill_global_mutex){+.+.+.}: [<ffffffff81079ad7>] lock_acquire+0x120/0x15b [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39 [<ffffffffa014b4ab>] rfkill_register+0x2b/0x29c [rfkill] [<ffffffffa0185ba0>] wiphy_register+0x1ae/0x270 [cfg80211] [<ffffffffa0206f01>] ieee80211_register_hw+0x1b4/0x3cf [mac80211] [<ffffffffa0292e98>] iwl_ucode_callback+0x9e9/0xae3 [iwlagn] [<ffffffff812d3e9d>] request_firmware_work_func+0x54/0x6f [<ffffffff81065d15>] kthread+0x8c/0x94 [<ffffffff8100ac24>] kernel_thread_helper+0x4/0x10 -> #1 (cfg80211_mutex){+.+.+.}: [<ffffffff81079ad7>] lock_acquire+0x120/0x15b [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39 [<ffffffffa018605e>] cfg80211_get_dev_from_ifindex+0x1b/0x7c [cfg80211] [<ffffffffa0189f36>] cfg80211_wext_giwscan+0x58/0x990 [cfg80211] [<ffffffff8139a3ce>] ioctl_standard_iw_point+0x1a8/0x272 [<ffffffff8139a529>] ioctl_standard_call+0x91/0xa7 [<ffffffff8139a687>] T.723+0xbd/0x12c [<ffffffff8139a727>] wext_handle_ioctl+0x31/0x6d [<ffffffff8133014e>] dev_ioctl+0x63d/0x67a [<ffffffff8131afd9>] sock_ioctl+0x48/0x21d [<ffffffff81102abd>] do_vfs_ioctl+0x4ba/0x509 [<ffffffff81102b5d>] sys_ioctl+0x51/0x74 [<ffffffff81009e02>] system_call_fastpath+0x16/0x1b -> #0 (rtnl_mutex){+.+.+.}: [<ffffffff810796b0>] __lock_acquire+0xa93/0xd9a [<ffffffff81079ad7>] lock_acquire+0x120/0x15b [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39 [<ffffffff813396c7>] rtnl_lock+0x12/0x14 [<ffffffffa0185cb5>] cfg80211_rfkill_set_block+0x1a/0x7b [cfg80211] [<ffffffffa014aed0>] rfkill_set_block+0x80/0xd5 [rfkill] [<ffffffffa014b07e>] __rfkill_switch_all+0x3f/0x6f [rfkill] [<ffffffffa014b13d>] rfkill_switch_all+0x38/0x49 [rfkill] [<ffffffffa014b821>] rfkill_op_handler+0x105/0x136 [rfkill] [<ffffffff81060708>] process_one_work+0x248/0x403 [<ffffffff81062620>] worker_thread+0x139/0x214 [<ffffffff81065d15>] kthread+0x8c/0x94 [<ffffffff8100ac24>] kernel_thread_helper+0x4/0x10 Signed-off-by:
Johannes Berg <johannes@sipsolutions.net>
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David S. Miller authored
Once we started enforcing the a nl_table[] entry exist for a protocol, NETLINK_USERSOCK stopped working. Add a dummy table entry so that it works again. Reported-by:
Thomas Voegtle <tv@lio96.de> Tested-by:
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David S. Miller authored
If irda_open_tsap() fails, the irda_bind() code tries to destroy the ->ias_obj object by hand, but does so wrongly. In particular, it fails to a) release the hashbin attached to the object and b) reset the self->ias_obj pointer to NULL. Fix both problems by using irias_delete_object() and explicitly setting self->ias_obj to NULL, just as irda_release() does. Reported-by:
Tavis Ormandy <taviso@cmpxchg8b.com> Signed-off-by:
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- 30 Aug, 2010 5 commits
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Johannes Berg authored
Wireless extensions have an unfortunate, undocumented requirement which requires drivers to always fill iwp->length when returning a successful status. When a driver doesn't do this, it leads to a kernel heap content leak when userspace offers a larger buffer than would have been necessary. Arguably, this is a driver bug, as it should, if it returns 0, fill iwp->length, even if it separately indicated that the buffer contents was not valid. However, we can also at least avoid the memory content leak if the driver doesn't do this by setting the iwp length to max_tokens, which then reflects how big the buffer is that the driver may fill, regardless of how big the userspace buffer is. To illustrate the point, this patch also fixes a corresponding cfg80211 bug (since this requirement isn't documented nor was ever pointed out by anyone during code review, I don't trust all drivers nor all cfg80211 handlers to implement it correctly). Cc: stable@kernel.org [all the way back] Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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John W. Linville authored
Reported-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Johannes Berg authored
The new workqueue changes helped me find this bug that's been lingering since the changes to the work processing in mac80211 -- the work timer is never deleted properly. Do that to avoid having it fire after all data structures have been freed. It can't be re-armed because all it will do, if running, is schedule the work, but that gets flushed later and won't have anything to do since all work items are gone by now (by way of interface removal). Cc: stable@kernel.org [2.6.34+] Signed-off-by:
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Christian Lamparter authored
Michael reported that p54* never really entered power save mode, even tough it was enabled. It turned out that upon a power save mode change the firmware will set a special flag onto the last outgoing frame tx status (which in this case is almost always the designated PSM nullfunc frame). This flag confused the driver; It erroneously reported transmission failures to the stack, which then generated the next nullfunc. and so on... Cc: <stable@kernel.org> Reported-by:
Michael Buesch <mb@bu3sch.de> Tested-by:
Christian Lamparter <chunkeey@googlemail.com> Signed-off-by:
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John W. Linville authored
This avoids a NULL pointer dereference as reported here: https://bugzilla.redhat.com/show_bug.cgi?id=625889 When the WARN condition is hit in ieee80211_get_tx_rate, it will return NULL. So, we need to check the return value and avoid dereferencing it in that case. Signed-off-by:
Bob Copeland <me@bobcopeland.com>
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- 28 Aug, 2010 2 commits
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Ken Kawasaki authored
pcnet_cs: add new_id: "KENTRONICS KEP-230" 10Base-T PCMCIA card. Signed-off-by:Ken Kawasaki <ken_kawasaki@spring.nifty.jp> Signed-off-by:
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Julia Lawall authored
The string clone is only used as a temporary copy of the argument val within the while loop, and so it should be freed before leaving the function. The call to strsep, however, modifies clone, so a pointer to the front of the string is kept in saved_clone, to make it possible to free it. The sematic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ local idexpression x; expression E; identifier l; statement S; @@ *x= \(kasprintf\|kstrdup\)(...); ... if (x == NULL) S ... when != kfree(x) when != E = x if (...) { <... when != kfree(x) * goto l; ...> * return ...; } // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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- 27 Aug, 2010 1 commit
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Mike Rapoport authored
The commit 886275ce (param: lock if_sdio's lbs_helper_name and lbs_fw_name against sysfs changes) introduced new fields into the if_sdio_card structure. It caused missalignment of the if_sdio_card.buffer field and failure at driver load time: ~# modprobe libertas_sdio [ 62.315124] libertas_sdio: Libertas SDIO driver [ 62.319976] libertas_sdio: Copyright Pierre Ossman [ 63.020629] DMA misaligned error with device 48 [ 63.025207] mmci-omap-hs mmci-omap-hs.1: unexpected dma status 800 [ 66.005035] libertas: command 0x0003 timed out [ 66.009826] libertas: Timeout submitting command 0x0003 [ 66.016296] libertas: PREP_CMD: command 0x0003 failed: -110 Adding explicit alignment attribute for the if_sdio_card.buffer field fixes this problem. Signed-off-by:
Mike Rapoport <mike@compulab.co.il> Acked-by:
Marek Vasut <marek.vasut@gmail.com> Acked-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
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- 26 Aug, 2010 6 commits
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Jeff Mahoney authored
caif does not build on ia64 starting with 2.6.32-rc1. Using asm/unaligned.h instead of linux/unaligned/le_byteshift.h fixes the issue. include/linux/unaligned/le_byteshift.h:40:50: error: redefinition of 'get_unaligned_le16' include/linux/unaligned/le_byteshift.h:45:50: error: redefinition of 'get_unaligned_le32' include/linux/unaligned/le_byteshift.h:50:50: error: redefinition of 'get_unaligned_le64' include/linux/unaligned/le_byteshift.h:55:51: error: redefinition of 'put_unaligned_le16' include/linux/unaligned/le_byteshift.h:60:51: error: redefinition of 'put_unaligned_le32' include/linux/unaligned/le_byteshift.h:65:51: error: redefinition of 'put_unaligned_le64' include/linux/unaligned/le_struct.h:31:51: note: previous definition of 'put_unaligned_le64' was here Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Bernard Pidoux F6BVP authored
This patch moves a missplaced sock_put(sk) after bh_unlock_sock(sk) like in other parts of AX25 driver. Signed-off-by:
Bernard Pidoux <f6bvp@free.fr> Signed-off-by:
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Breno Leitao authored
Qlge is freeing the buffers before stopping the card DMA, and this can cause some severe error, as a EEH event on PPC. This patch just stop the card and then free the resources. Signed-off-by:
Ron Mercer <ron.mercer@qlogic.com> Signed-off-by:
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Eric Dumazet authored
close https://bugzilla.kernel.org/show_bug.cgi?id=16529 Before calling dev_forward_skb(), we should make sure skb head contains at least an ethernet header, even if length included in upper layer said so. Use pskb_may_pull() to make sure this ethernet header is present in skb head. Reported-by:
Thomas Heil <heil@terminal-consulting.de> Reported-by:
Ian Campbell <Ian.Campbell@eu.citrix.com> Signed-off-by:
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KOSAKI Motohiro authored
This issue come from ruby language community. Below test program hang up when only run on Linux. % uname -mrsv Linux 2.6.26-2-486 #1 Sat Dec 26 08:37:39 UTC 2009 i686 % ruby -rsocket -ve ' BasicSocket.do_not_reverse_lookup = true serv = TCPServer.open("127.0.0.1", 0) s1 = TCPSocket.open("127.0.0.1", serv.addr[1]) s2 = serv.accept s2.close s1.write("a") rescue p $! s1.write("a") rescue p $! Thread.new { s1.write("a") }.join' ruby 1.9.3dev (2010-07-06 trunk 28554) [i686-linux] #<Errno::EPIPE: Broken pipe> [Hang Here] FreeBSD, Solaris, Mac doesn't. because Ruby's write() method call select() internally. and tcp_poll has a bug. SUS defined 'ready for writing' of select() as following. | A descriptor shall be considered ready for writing when a call to an output | function with O_NONBLOCK clear would not block, whether or not the function | would transfer data successfully. That said, EPIPE situation is clearly one of 'ready for writing'. We don't have read-side issue because tcp_poll() already has read side shutdown care. | if (sk->sk_shutdown & RCV_SHUTDOWN) | mask |= POLLIN | POLLRDNORM | POLLRDHUP; So, Let's insert same logic in write side. - reference url http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/31065 http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/31068Signed-off-by:KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Eric Dumazet authored
As discovered by Anton Blanchard, current code to autotune tcp_death_row.sysctl_max_tw_buckets, sysctl_tcp_max_orphans and sysctl_max_syn_backlog makes little sense. The bigger a page is, the less tcp_max_orphans is : 4096 on a 512GB machine in Anton's case. (tcp_hashinfo.bhash_size * sizeof(struct inet_bind_hashbucket)) is much bigger if spinlock debugging is on. Its wrong to select bigger limits in this case (where kernel structures are also bigger) bhash_size max is 65536, and we get this value even for small machines. A better ground is to use size of ehash table, this also makes code shorter and more obvious. Based on a patch from Anton, and another from David. Reported-and-tested-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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