- 16 Nov, 2012 40 commits
-
-
Jesper Dangaard Brouer authored
[ Upstream commit 8f363b77 ] Reading TCP stats when using TCP Illinois congestion control algorithm can cause a divide by zero kernel oops. The division by zero occur in tcp_illinois_info() at: do_div(t, ca->cnt_rtt); where ca->cnt_rtt can become zero (when rtt_reset is called) Steps to Reproduce: 1. Register tcp_illinois: # sysctl -w net.ipv4.tcp_congestion_control=illinois 2. Monitor internal TCP information via command "ss -i" # watch -d ss -i 3. Establish new TCP conn to machine Either it fails at the initial conn, or else it needs to wait for a loss or a reset. This is only related to reading stats. The function avg_delay() also performs the same divide, but is guarded with a (ca->cnt_rtt > 0) at its calling point in update_params(). Thus, simply fix tcp_illinois_info(). Function tcp_illinois_info() / get_info() is called without socket lock. Thus, eliminate any race condition on ca->cnt_rtt by using a local stack variable. Simply reuse info.tcpv_rttcnt, as its already set to ca->cnt_rtt. Function avg_delay() is not affected by this race condition, as its called with the socket lock. Cc: Petr Matousek <pmatouse@redhat.com> Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Acked-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk>
-
Hemant Kumar authored
[ Upstream commit 39707c2a ] Driver anchors the tx urbs and defers the urb submission if a transmit request comes when the interface is suspended. Anchoring urb increments the urb reference count. These deferred urbs are later accessed by calling usb_get_from_anchor() for submission during interface resume. usb_get_from_anchor() unanchors the urb but urb reference count remains same. This causes the urb reference count to remain non-zero after usb_free_urb() gets called and urb never gets freed. Hence call usb_put_urb() after anchoring the urb to properly balance the reference count for these deferred urbs. Also, unanchor these deferred urbs during disconnect, to free them up. Signed-off-by:
Hemant Kumar <hemantk@codeaurora.org> Acked-by:
Oliver Neukum <oneukum@suse.de> Signed-off-by:
-
Li RongQing authored
[ Upstream commit 14edd87d ] Commit a02e4b7d(Demark default hoplimit as zero) only changes the hoplimit checking condition and default value in ip6_dst_hoplimit, not zeros all hoplimit default value. Keep the zeroing ip6_template_metrics[RTAX_HOPLIMIT - 1] to force it as const, cause as a37e6e34(net: force dst_default_metrics to const section) Signed-off-by:
Li RongQing <roy.qing.li@gmail.com> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit a3374c42 ] tcp_ioctl() tries to take into account if tcp socket received a FIN to report correct number bytes in receive queue. But its flaky because if the application ate the last skb, we return 1 instead of 0. Correct way to detect that FIN was received is to test SOCK_DONE. Reported-by:
Elliot Hughes <enh@google.com> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit 6d772ac5 ] On some suspend/resume operations involving wimax device, we have noticed some intermittent memory corruptions in netlink code. Stéphane Marchesin tracked this corruption in netlink_update_listeners() and suggested a patch. It appears netlink_release() should use kfree_rcu() instead of kfree() for the listeners structure as it may be used by other cpus using RCU protection. netlink_release() must set to NULL the listeners pointer when it is about to be freed. Also have to protect netlink_update_listeners() and netlink_has_listeners() if listeners is NULL. Add a nl_deref_protected() lockdep helper to properly document which locks protects us. Reported-by:
Jonathan Kliegman <kliegs@google.com> Signed-off-by:
-
Zijie Pan authored
[ Upstream commit f6e80abe ] Bug introduced by commit edfee033 (sctp: check src addr when processing SACK to update transport state) Signed-off-by:
Zijie Pan <zijie.pan@6wind.com> Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by:
Vlad Yasevich <vyasevich@gmail.com> Signed-off-by:
-
Thomas Hellstrom authored
commit afcc87aa upstream. Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Brian Paul <brianp@vmware.com> Reviewed-by:
Dmitry Torokhov <dtor@vmware.com> Cc: linux-graphics-maintainer@vmware.com Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
-
Thomas Hellstrom authored
commit 95e8f6a2 upstream. The device would not reset properly when resuming from hibernation. Signed-off-by:
-
Takamori Yamaguchi authored
commit b0a8cc58 upstream. In kswapd(), set current->reclaim_state to NULL before returning, as current->reclaim_state holds reference to variable on kswapd()'s stack. In rare cases, while returning from kswapd() during memory offlining, __free_slab() and freepages() can access the dangling pointer of current->reclaim_state. Signed-off-by:
Takamori Yamaguchi <takamori.yamaguchi@jp.sony.com> Signed-off-by:
Aaditya Kumar <aaditya.kumar@ap.sony.com> Acked-by:
David Rientjes <rientjes@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
-
Eric Paris authored
commit 848561d3 upstream. Anders Blomdell noted in 2010 that Fanotify lost events and provided a test case. Eric Paris confirmed it was a bug and posted a fix to the list https://groups.google.com/forum/?fromgroups=#!topic/linux.kernel/RrJfTfyW2BE but never applied it. Repeated attempts over time to actually get him to apply it have never had a reply from anyone who has raised it So apply it anyway Signed-off-by:
Alan Cox <alan@linux.intel.com> Reported-by:
Anders Blomdell <anders.blomdell@control.lth.se> Cc: Eric Paris <eparis@redhat.com> Signed-off-by:
-
Dave Chinner authored
commit 6ce377af upstream. Commit 44396476 ("xfs: reset buffer pointers before freeing them") in 3.0-rc1 introduced a regression when recovering log buffers that wrapped around the end of log. The second part of the log buffer at the start of the physical log was being read into the header buffer rather than the data buffer, and hence recovery was seeing garbage in the data buffer when it got to the region of the log buffer that was incorrectly read. Reported-by:
Torsten Kaiser <just.for.lkml@googlemail.com> Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Mark Tinguely <tinguely@sgi.com> Signed-off-by:
Ben Myers <bpm@sgi.com> Signed-off-by:
-
Takashi Iwai authored
commit 8bb4d9ce upstream. There are uncovered cases whether the card refcount introduced by the commit a0830dbd isn't properly increased or decreased: - OSS PCM and mixer success paths - When lookup function gets NULL This patch fixes these places. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50251Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
-
Kailang Yang authored
commit 19a62823 upstream. Signed-off-by:
Kailang Yang <kailang@realtek.com> Signed-off-by:
-
Takashi Iwai authored
commit ef4da458 upstream. VT1802 codec provides the invalid connection lists of NID 0x24 and 0x33 containing the routes to a non-exist widget 0x3e. This confuses the auto-parser. Fix it up in the driver by overriding these connections. Reported-by:
Massimo Del Fedele <max@veneto.com> Signed-off-by:
-
Takashi Iwai authored
commit 5b376195 upstream. In via_auto_fill_adc_nids(), the parser tries to fill dac_nids[] at the point of the current line-out (i). When no valid path is found for this output, this results in dac = 0, thus it creates a hole in dac_nids[]. This confuses is_empty_dac() and trims the detected DAC in later reference. This patch fixes the bug by appending DAC properly to dac_nids[] in via_auto_fill_adc_nids(). Reported-by:
-
Ilija Hadzic authored
commit 0f1cb1bd upstream. If drm_setup (called at first open) fails, the whole open call has failed, so we should not keep the open_count incremented. Signed-off-by:
Ilija Hadzic <ihadzic@research.bell-labs.com> Reviewed-by:
-
Jean Delvare authored
commit 3300fb4f upstream. Don't assume bank 0 is selected at device probe time. This may not be the case. Force bank selection at first register access to guarantee that we read the right registers upon driver loading. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Reviewed-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
-
Takashi Iwai authored
commit ae24c319 upstream. Several bug reports suggest that the forcibly resetting IEC958 status bits is required for AD codecs to get the SPDIF output working properly after changing streams. Original fix credit to Javeed Shaikh. BugLink: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/359361Reported-by:
Robin Kreis <r.kreis@uni-bremen.de> Signed-off-by:
-
Daniel J Blueman authored
commit 16337e02 upstream. Correctly enable the digital microphones with the right bits in the right coeffecient registers on Cirrus CS4206/7 codecs. It also prevents misconfiguring ADC1/2. This fixes the digital mic on the Macbook Pro 10,1/Retina. Based-on-patch-by:
Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by:
Daniel J Blueman <daniel@quora.org> Signed-off-by:
-
Alexander Stein authored
commit 5a83b4b5 upstream. Signed-off-by:
-
Jeff Layton authored
commit 36960e44 upstream. The userspace cifs.idmap program generally works with the wbclient libs to generate binary SIDs in userspace. That program defines the struct that holds these values as having a max of 15 subauthorities. The kernel idmapping code however limits that value to 5. When the kernel copies those values around though, it doesn't sanity check the num_subauths value handed back from userspace or from the server. It's possible therefore for userspace to hand us back a bogus num_subauths value (or one that's valid, but greater than 5) that could cause the kernel to walk off the end of the cifs_sid->sub_auths array. Fix this by defining a new routine for copying sids and using that in all of the places that copy it. If we end up with a sid that's longer than expected then this approach will just lop off the "extra" subauths, but that's basically what the code does today already. Better approaches might be to fix this code to reject SIDs with >5 subauths, or fix it to handle the subauths array dynamically. At the same time, change the kernel to check the length of the data returned by userspace. If it's shorter than struct cifs_sid, reject it and return -EIO. If that happens we'll end up with fields that are basically uninitialized. Long term, it might make sense to redefine cifs_sid using a flexarray at the end, to allow for variable-length subauth lists, and teach the code to handle the case where the subauths array being passed in from userspace is shorter than 5 elements. Note too, that I don't consider this a security issue since you'd need a compromised cifs.idmap program. If you have that, you can do all sorts of nefarious stuff. Still, this is probably reasonable for stable. Reviewed-by:
Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by:
Jeff Layton <jlayton@redhat.com> Signed-off-by:
-
Egbert Eich authored
commit 83325d07 upstream. An uninitialized variable led to broken load detection. Signed-off-by:
Egbert Eich <eich@suse.de> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
-
Roland Dreier authored
commit d5627acb upstream. The sleeping code in iscsi_target_tx_thread() is susceptible to the classic missed wakeup race: - TX thread finishes handle_immediate_queue() and handle_response_queue(), thinks both queues are empty. - Another thread adds a queue entry and does wake_up_process(), which does nothing because the TX thread is still awake. - TX thread does schedule_timeout() and sleeps forever. In practice this can kill an iSCSI connection if for example an initiator does single-threaded writes and the target misses the wakeup window when queueing an R2T; in this case the connection will be stuck until the initiator loses patience and does some task management operation (or kills the connection entirely). Fix this by converting to wait_event_interruptible(), which does not suffer from this sort of race. Signed-off-by:
Roland Dreier <roland@purestorage.com> Cc: Andy Grover <agrover@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:
-
Roland Dreier authored
commit 3e03989b upstream. The expression (max_sectors * block_size) might overflow a u32 (indeed, since iblock sets max_hw_sectors to UINT_MAX, it is guaranteed to overflow and end up with a much-too-small result in many common cases). Fix this by doing an equivalent calculation that doesn't require multiplication. While we're touching this code, avoid splitting a printk format across two lines and use pr_info(...) instead of printk(KERN_INFO ...). Signed-off-by:
-
Roland Dreier authored
commit 0d0f9dfb upstream. If the call to core_dev_release_virtual_lun0() fails, then nothing sets ret to anything other than 0, so even though everything is torn down and freed, target_core_init_configfs() will seem to succeed and the module will be loaded. Fix this by passing the return value on up the chain. Signed-off-by:
-
Ben Hutchings authored
commit 97a54868 upstream. Since commit c7f404b4 ('vfs: new superblock methods to override /proc/*/mount{s,info}'), nfs_path() is used to generate the mounted device name reported back to userland. nfs_path() always generates a trailing slash when the given dentry is the root of an NFS mount, but userland may expect the original device name to be returned verbatim (as it used to be). Make this canonicalisation optional and change the callers accordingly. [jrnieder@gmail.com: use flag instead of bool argument] Reported-and-tested-by:
Chris Hiestand <chiestand@salk.edu> Reference: http://bugs.debian.org/669314Signed-off-by:
Jonathan Nieder <jrnieder@gmail.com> Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> [bwh: Backported to 3.2: - Adjust context - nfs_show_devname() still takes a pointer to struct vfsmount]
-
Scott Mayhew authored
commit acce94e6 upstream. In very busy v3 environment, rpc.mountd can respond to the NULL procedure but not the MNT procedure in a timely manner causing the MNT procedure to time out. The problem is the mount system call returns EIO which causes the mount to fail, instead of ETIMEDOUT, which would cause the mount to be retried. This patch sets the RPC_TASK_SOFT|RPC_TASK_TIMEOUT flags to the rpc_call_sync() call in nfs_mount() which causes ETIMEDOUT to be returned on timed out connections. Signed-off-by:
Steve Dickson <steved@redhat.com> Signed-off-by:
-
NeilBrown authored
commit 8d96b106 upstream. The DNS resolver's use of the sunrpc cache involves a 'ttl' number (relative) rather that a timeout (absolute). This confused me when I wrote commit c5b29f88 "sunrpc: use seconds since boot in expiry cache" and I managed to break it. The effect is that any TTL is interpreted as 0, and nothing useful gets into the cache. This patch removes the use of get_expiry() - which really expects an expiry time - and uses get_uint() instead, treating the int correctly as a ttl. This fixes a regression that has been present since 2.6.37, causing certain NFS accesses in certain environments to incorrectly fail. Reported-by:
Chuck Lever <chuck.lever@oracle.com> Tested-by:
NeilBrown <neilb@suse.de> Signed-off-by:
-
Trond Myklebust authored
commit 2b1bc308 upstream. If the state recovery machinery is triggered by the call to nfs4_async_handle_error() then we can deadlock. Signed-off-by:
-
Trond Myklebust authored
commit 2240a9e2 upstream. If we do not release the sequence id in cases where we fail to get a session slot, then we can deadlock if we hit a recovery scenario. Signed-off-by:
-
Bryan Schumaker authored
commit 399f11c3 upstream. Currently, we will schedule session recovery and then return to the caller of nfs4_handle_exception. This works for most cases, but causes a hang on the following test case: Client Server ------ ------ Open file over NFS v4.1 Write to file Expire client Try to lock file The server will return NFS4ERR_BADSESSION, prompting the client to schedule recovery. However, the client will continue placing lock attempts and the open recovery never seems to be scheduled. The simplest solution is to wait for session recovery to run before retrying the lock. Signed-off-by:
Bryan Schumaker <bjschuma@netapp.com> Signed-off-by:
-
Konrad Rzeszutek Wilk authored
commit 95a7d768 upstream. As Mukesh explained it, the MMUEXT_TLB_FLUSH_ALL allows the hypervisor to do a TLB flush on all active vCPUs. If instead we were using the generic one (which ends up being xen_flush_tlb) we end up making the MMUEXT_TLB_FLUSH_LOCAL hypercall. But before we make that hypercall the kernel will IPI all of the vCPUs (even those that were asleep from the hypervisor perspective). The end result is that we needlessly wake them up and do a TLB flush when we can just let the hypervisor do it correctly. This patch gives around 50% speed improvement when migrating idle guest's from one host to another. Oracle-bug: 14630170 Tested-by:
Jingjie Jiang <jingjie.jiang@oracle.com> Suggested-by:
Mukesh Rathor <mukesh.rathor@oracle.com> Signed-off-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by:
-
Jiri Slaby authored
commit 3ccc60f9 upstream. Microsoft Digital Media Keyboard 3000 has two interfaces, and the second one has a report descriptor with a bug. The second collection says: 05 01 -- global; usage page -- 01 -- Generic Desktop Controls 09 80 -- local; usage -- 80 -- System Control a1 01 -- main; collection -- 01 -- application 85 03 -- global; report ID -- 03 19 00 -- local; Usage Minimum -- 00 29 ff -- local; Usage Maximum -- ff 15 00 -- global; Logical Minimum -- 0 26 ff 00 -- global; Logical Maximum -- ff 81 00 -- main; input c0 -- main; End Collection I.e. it makes us think that there are all kinds of usages of system control. That the keyboard is a not only a keyboard, but also a joystick, mouse, gamepad, keypad, etc. The same as for the Wireless Desktop Receiver, this should be Physical Min/Max. So fix that appropriately. References: https://bugzilla.novell.com/show_bug.cgi?id=776834Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
-
Rolf Eike Beer authored
commit 32ed1911 upstream. The tsc40 driver announces it supports the pressure event, but will never send one. The announcement will cause tslib to wait for such events and sending all touch events with a pressure of 0. Removing the announcement will make tslib fall back to emulating the pressure on touch events so everything works as expected. Signed-off-by:
Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
-
Rusty Russell authored
commit 59ef28b1 upstream. Masaki found and patched a kallsyms issue: the last symbol in a module's symtab wasn't transferred. This is because we manually copy the zero'th entry (which is always empty) then copy the rest in a loop starting at 1, though from src[0]. His fix was minimal, I prefer to rewrite the loops in more standard form. There are two loops: one to get the size, and one to copy. Make these identical: always count entry 0 and any defined symbol in an allocated non-init section. This bug exists since the following commit was introduced. module: reduce symbol table for loaded modules (v2) commit: 4a496226 LKML: http://lkml.org/lkml/2012/10/24/27Reported-by:
Masaki Kimura <masaki.kimura.kz@hitachi.com> Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> [bwh: Backported to 3.2: we're still using a bitmap to compress the string table] Signed-off-by:
-
Sven Eckelmann authored
commit 6fe7cc71 upstream. The ath9k xmit functions for AMPDUs can send frames as non-aggregate in case only one frame is currently available. The client will then answer using a normal Ack instead of a BlockAck. This acknowledgement has no TID stored and therefore the hardware is not able to provide us the corresponding TID. The TID set by the hardware in the tx status descriptor has to be seen as undefined and not as a valid TID value for normal acknowledgements. Doing otherwise results in a massive amount of retransmissions and stalls of connections. Users may experience low bandwidth and complete connection stalls in environments with transfers using multiple TIDs. This regression was introduced in b11b160d ("ath9k: validate the TID in the tx status information"). Signed-off-by:
Sven Eckelmann <sven@narfation.org> Signed-off-by:
Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Acked-by:
Felix Fietkau <nbd@openwrt.org> Signed-off-by:
John W. Linville <linville@tuxdriver.com> [bwh: Backported to 3.2: adjust context] Signed-off-by:
-
Stanislaw Gruszka authored
commit bf7e1abe upstream. Some hardware has correct (!= 0xff) value of tssi_bounds[4] in the EEPROM, but step is equal to 0xff. This results on ridiculous delta calculations and completely broke TX power settings. Reported-and-tested-by:
Pavel Lucik <pavel.lucik@gmail.com> Signed-off-by:
Stanislaw Gruszka <sgruszka@redhat.com> Acked-by:
Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by:
-
David Vrabel authored
commit a67baeb7 upstream. map->kmap_ops allocated in gntdev_alloc_map() wasn't freed by gntdev_put_map(). Add a gntdev_free_map() helper function to free everything allocated by gntdev_alloc_map(). Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
-
Herton Ronaldo Krzesinski authored
commit d60e7ec1 upstream. On floppy initialization, if something failed inside the loop we call add_disk, there was no cleanup of previous iterations in the error handling. Signed-off-by:
Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> [bwh: Backported to 3.2: adjust context] Signed-off-by:
-
Herton Ronaldo Krzesinski authored
commit 238ab784 upstream. If blk_init_queue fails, we do not call put_disk on the current dr (dr is decremented first in the error handling loop). Reviewed-by:
-
