- 24 Mar, 2010 19 commits
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Ravikiran G Thirumalai authored
Fix an 'oops' when a tmpfs mount point is mounted with the mpol=default mempolicy. Upon remounting a tmpfs mount point with 'mpol=default' option, the mount code crashed with a null pointer dereference. The initial problem report was on 2.6.27, but the problem exists in mainline 2.6.34-rc as well. On examining the code, we see that mpol_new returns NULL if default mempolicy was requested. This 'NULL' mempolicy is accessed to store the node mask resulting in oops. The following patch fixes it. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Acked-by:
Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jani Nikula authored
Use IS_ERR() instead of comparing to NULL. [akpm@linux-foundation.org: preserve the error code] Signed-off-by:
Jani Nikula <ext-jani.1.nikula@nokia.com> Cc: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by:
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Robin Holt authored
ksm.c's write_protect_page implements a lockless means of verifying a page does not have any users of the page which are not accounted for via other kernel tracking means. It does this by removing the writable pte with TLB flushes, checking the page_count against the total known users, and then using set_pte_at_notify to make it a read-only entry. An unneeded mmu_notifier callout is made in the case where the known users does not match the page_count. In that event, we are inserting the identical pte and there is no need for the set_pte_at_notify, but rather the simpler set_pte_at suffices. Signed-off-by:
Robin Holt <holt@sgi.com> Acked-by:
Izik Eidus <ieidus@redhat.com> Acked-by:
Andrea Arcangeli <aarcange@redhat.com> Acked-by:
Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Chris Wright <chrisw@redhat.com> Signed-off-by:
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Randy Dunlap authored
Fix a fatal error in scripts/kernel-doc when a function signature uses __init_or_module (just ignore that string): Error(drivers/base/platform.c:568): cannot understand prototype: 'struct platform_device * __init_or_module platform_create_bundle(struct platform_driver *driver, int (*probe)(struct platform_device *), struct resource *res, unsigned int n_res, const void *data, size_t size) ' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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FUJITA Tomonori authored
This patch renames PCI/PCI-DMA-mapping.txt to DMA-API-HOWTO.txt. The commit 51e7364e "Documentation: rename PCI-DMA-mapping.txt to DMA-API-HOWTO.txt" was supposed to do this but it didn't. Signed-off-by:
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by:
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David Härdeman authored
include/linux/kfifo.h first defines and then undefines __kfifo_initializer which is used by INIT_KFIFO (which is also a macro, so building a module which uses INIT_KFIFO will fail). Signed-off-by:
David Härdeman <david@hardeman.nu> Acked-by:
Stefani Seibold <stefani@seibold.net> Cc: <stable@kernel.org> Signed-off-by:
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David Howells authored
Fix an incorrect comment in the do_mmap_shared_file(). If a mapping is requested MAP_SHARED, then a private copy cannot be made and still provide correct semantics. Signed-off-by:
David Howells <dhowells@redhat.com> Reported-by:
Dave Hudson <uclinux@blueteddy.net> Signed-off-by:
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Joe Perches authored
Keeps MAINTAINERS a bit more consistent. done via sed -r -i -e 's/^([A-Z]):[ \t]+/\1:\t/g' MAINTAINERS Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Richard Röjfors authored
According to the header in max730x it is licensed GPLv2. Add a MODULE_LICENSE to avoid getting the kernel tainted. [w.sang@pengutronix.de: add MODULE_AUTHOR and MODULE_DESCRIPTION also] Signed-off-by:
Richard Röjfors <richard.rojfors@pelagicore.com> Signed-off-by:
Wolfram Sang <w.sang@pengutronix.de> Signed-off-by:
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Greg Thelen authored
Update memory.txt to be more consistent: s/swapiness/swappiness/ Signed-off-by:
Greg Thelen <gthelen@google.com> Acked-by:
Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by:
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Wolfram Sang authored
Commit 22dd5b0c (fix perlcritic warnings) broke the ability to handle STDIN because the three argument version of open() cannot handle standard IO-streams (which is mentioned in PerlBestPractices, too). Signed-off-by:
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Mike Frysinger authored
We see only one section mismatch now after thousands of randconfigs, and a bug has been filed about that one. Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
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Russell King authored
cpu_relax() is documented in volatile-considered-harmful.txt to be a memory barrier. However, everyone with the exception of Blackfin and possibly ia64 defines cpu_relax() to be a compiler barrier. Make the documentation reflect the general concensus. Linus sayeth: : I don't think it was ever the intention that it would be seen as anything : but a compiler barrier, although it is obviously implied that it might : well perform some per-architecture actions that have "memory barrier-like" : semantics. : : After all, the whole and only point of the "cpu_relax()" thing is to tell : the CPU that we're busy-looping on some event. : : And that "event" might be (and often is) about reading the same memory : location over and over until it changes to what we want it to be. So it's : quite possible that on various architectures the "cpu_relax()" could be : about making sure that such a tight loop on loads doesn't starve cache : transactions, for example - and as such look a bit like a memory barrier : from a CPU standpoint. : : But it's not meant to have any kind of architectural memory ordering : semantics as far as the kernel is concerned - those must come from other : sources. Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Cc: <linux-arch@vger.kernel.org> Acked-by:
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Borislav Petkov authored
fs/binfmt_aout.c: In function `aout_core_dump': fs/binfmt_aout.c:125: warning: passing argument 2 of `dump_write' makes pointer from integer without a cast include/linux/coredump.h:12: note: expected `const void *' but argument is of type `long unsigned int' fs/binfmt_aout.c:132: warning: passing argument 2 of `dump_write' makes pointer from integer without a cast include/linux/coredump.h:12: note: expected `const void *' but argument is of type `long unsigned int' due to dump_write() expecting a user void *. Fold casts into the START_DATA/START_STACK macros and shut up the warnings. Signed-off-by:
Borislav Petkov <petkovbb@gmail.com> Cc: Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com> Signed-off-by:
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Randy Dunlap authored
scripts/kernel-doc erroneously says: Warning(include/linux/skbuff.h:410): Excess struct/union/enum/typedef member 'cb' description in 'sk_buff' on this line in struct sk_buff: char cb[48] __aligned(8); due to treating the last field as the struct member name, so teach kernel-doc to ignore __aligned(x) in structs. Signed-off-by:
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Uwe Kleine-König authored
This was introduced by v2.6.34-rc1~38: 4c014e87 (rtc/mc13783: protect rtc {,un}registration by mc13783 lock) Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reported-by:
Dan Carpenter <error27@gmail.com> Signed-off-by:
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Dan Carpenter authored
There was a potential null deref introduced in c62b1a3b ("memcg: use generic percpu instead of private implementation"). Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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Li Zefan authored
commit e6a1105b ("cgroups: subsystem module loading interface") and commit c50cc752 ("sched, cgroups: Fix module export") result in duplicate including of module.h Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Acked-by:
Paul Menage <menage@google.com> Signed-off-by:
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Daisuke Nishimura authored
In commit 02491447 ("memcg: move charges of anonymous swap"), I tried to disable move charge feature in no mmu case by enclosing all the related functions with "#ifdef CONFIG_MMU", but the commit places these ifdefs in wrong place. (it seems that it's mangled while handling some fixes...) This patch fixes it up. Signed-off-by:
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by:
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- 22 Mar, 2010 16 commits
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Linus Torvalds authored
Commit 45575f5a ("ppc64 sys_ipc breakage in 2.6.34-rc2") fixed the definition of the sys_ipc() helper, but didn't fix the prototype in <linux/syscalls.h> Reported-and-tested-by:
Andreas Schwab <schwab@linux-m68k.org> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio: console: Check if port is valid in resize_console virtio: console: Generate a kobject CHANGE event on adding 'name' attribute
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (38 commits) ip_gre: include route header_len in max_headroom calculation if_tunnel.h: add missing ams/byteorder.h include ipv4: Don't drop redirected route cache entry unless PTMU actually expired net: suppress lockdep-RCU false positive in FIB trie. Bluetooth: Fix kernel crash on L2CAP stress tests Bluetooth: Convert debug files to actually use debugfs instead of sysfs Bluetooth: Fix potential bad memory access with sysfs files netfilter: ctnetlink: fix reliable event delivery if message building fails netlink: fix NETLINK_RECV_NO_ENOBUFS in netlink_set_err() NET_DMA: free skbs periodically netlink: fix unaligned access in nla_get_be64() tcp: Fix tcp_mark_head_lost() with packets == 0 net: ipmr/ip6mr: fix potential out-of-bounds vif_table access KS8695: update ksp->next_rx_desc_read at the end of rx loop igb: Add support for 82576 ET2 Quad Port Server Adapter ixgbevf: Message formatting cleanups ixgbevf: Shorten up delay timer for watchdog task ixgbevf: Fix VF Stats accounting after reset ixgbe: Set IXGBE_RSC_CB(skb)->DMA field to zero after unmapping the address ixgbe: fix for real_num_tx_queues update issue ...
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git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: edac, mce: Filter out invalid values
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Tetsuo Handa authored
alloc_skb() can return NULL. Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
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Dan Carpenter authored
It seems clear from the surrounding code that xpermits is allowed to be NULL here. Signed-off-by:
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Anton Blanchard authored
I chased down a fail on ppc64 on 2.6.34-rc2 where an application that uses shared memory was getting a SEGV. Commit baed7fc9 ("Add generic sys_ipc wrapper") changed the second argument from an unsigned long to an int. When we call shmget the system call wrappers for sys_ipc will sign extend second (ie the size) which truncates it. It took a while to track down because the call succeeds and strace shows the untruncated size :) The patch below changes second from an int to an unsigned long which fixes shmget on ppc64 (and I assume s390, sparc64 and mips64). Signed-off-by:
Anton Blanchard <anton@samba.org> -- I assume the function prototypes for the other IPC methods would cause us to sign or zero extend second where appropriate (avoiding any security issues). Come to think of it, the syscall wrappers for each method should do that for us as well. Signed-off-by:
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Rafael J. Wysocki authored
Commit 3f6da390 (perf: Rework and fix the arch CPU-hotplug hooks) broke suspend to RAM on my HP nx6325 (and most likely on other AMD-based boxes too) by allowing amd_pmu_cpu_offline() to be executed for CPUs that are going offline as part of the suspend process. The problem is that cpuhw->amd_nb may be NULL already, so the function should make sure it's not NULL before accessing the object pointed to by it. Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Borislav Petkov authored
Print the CPU associated with the error only when the field is valid. Cc: <stable@kernel.org> # .32.x .33.x Signed-off-by:Borislav Petkov <borislav.petkov@amd.com>
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Amit Shah authored
The console port could have been hot-unplugged. Check if it is valid before working on it. Signed-off-by:
Amit Shah <amit.shah@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
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Amit Shah authored
When the host lets us know what 'name' a port is assigned, we create the sysfs 'name' attribute. Generate a 'change' event after this so that udev wakes up and acts on the rules for virtio-ports (currently there's only one rule that creates a symlink from the 'name' to the actual char device). Signed-off-by:
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Timo Teräs authored
Taking route's header_len into account, and updating gre device needed_headroom will give better hints on upper bound of required headroom. This is useful if the gre traffic is xfrm'ed. Signed-off-by:
Timo Teras <timo.teras@iki.fi> Acked-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Paulius Zaleckas authored
When compiling userspace application which includes if_tunnel.h and uses GRE_* defines you will get undefined reference to __cpu_to_be16. Fix this by adding missing #include <asm/byteorder.h> Cc: stable@kernel.org Signed-off-by:
Paulius Zaleckas <paulius.zaleckas@gmail.com> Signed-off-by:
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Guenter Roeck authored
TCP sessions over IPv4 can get stuck if routers between endpoints do not fragment packets but implement PMTU instead, and we are using those routers because of an ICMP redirect. Setup is as follows MTU1 MTU2 MTU1 A--------B------C------D with MTU1 > MTU2. A and D are endpoints, B and C are routers. B and C implement PMTU and drop packets larger than MTU2 (for example because DF is set on all packets). TCP sessions are initiated between A and D. There is packet loss between A and D, causing frequent TCP retransmits. After the number of retransmits on a TCP session reaches tcp_retries1, tcp calls dst_negative_advice() prior to each retransmit. This results in route cache entries for the peer to be deleted in ipv4_negative_advice() if the Path MTU is set. If the outstanding data on an affected TCP session is larger than MTU2, packets sent from the endpoints will be dropped by B or C, and ICMP NEEDFRAG will be returned. A and D receive NEEDFRAG messages and update PMTU. Before the next retransmit, tcp will again call dst_negative_advice(), causing the route cache entry (with correct PMTU) to be deleted. The retransmitted packet will be larger than MTU2, causing it to be dropped again. This sequence repeats until the TCP session aborts or is terminated. Problem is fixed by removing redirected route cache entries in ipv4_negative_advice() only if the PMTU is expired. Signed-off-by:Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by:
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Paul E. McKenney authored
Allow fib_find_node() to be called either under rcu_read_lock() protection or with RTNL held. Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
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- 21 Mar, 2010 3 commits
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Andrei Emeltchenko authored
Added very simple check that req buffer has enough space to fit configuration parameters. Shall be enough to reject packets with configuration size more than req buffer. Crash trace below [ 6069.659393] Unable to handle kernel paging request at virtual address 02000205 [ 6069.673034] Internal error: Oops: 805 [#1] PREEMPT ... [ 6069.727172] PC is at l2cap_add_conf_opt+0x70/0xf0 [l2cap] [ 6069.732604] LR is at l2cap_recv_frame+0x1350/0x2e78 [l2cap] ... [ 6070.030303] Backtrace: [ 6070.032806] [<bf1c2880>] (l2cap_add_conf_opt+0x0/0xf0 [l2cap]) from [<bf1c6624>] (l2cap_recv_frame+0x1350/0x2e78 [l2cap]) [ 6070.043823] r8:dc5d3100 r7:df2a91d6 r6:00000001 r5:df2a8000 r4:00000200 [ 6070.050659] [<bf1c52d4>] (l2cap_recv_frame+0x0/0x2e78 [l2cap]) from [<bf1c8408>] (l2cap_recv_acldata+0x2bc/0x350 [l2cap]) [ 6070.061798] [<bf1c814c>] (l2cap_recv_acldata+0x0/0x350 [l2cap]) from [<bf0037a4>] (hci_rx_task+0x244/0x478 [bluetooth]) [ 6070.072631] r6:dc647700 r5:00000001 r4:df2ab740 [ 6070.077362] [<bf003560>] (hci_rx_task+0x0/0x478 [bluetooth]) from [<c006b9fc>] (tasklet_action+0x78/0xd8) [ 6070.087005] [<c006b984>] (tasklet_action+0x0/0xd8) from [<c006c160>] Signed-off-by:
Andrei Emeltchenko <andrei.emeltchenko@nokia.com> Acked-by:
Gustavo F. Padovan <gustavo@padovan.org> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org>
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Marcel Holtmann authored
Some of the debug files ended up wrongly in sysfs, because at that point of time, debugfs didn't exist. Convert these files to use debugfs and also seq_file. This patch converts all of these files at once and then removes the exported symbol for the Bluetooth sysfs class. Signed-off-by: -
Marcel Holtmann authored
When creating a high number of Bluetooth sockets (L2CAP, SCO and RFCOMM) it is possible to scribble repeatedly on arbitrary pages of memory. Ensure that the content of these sysfs files is always less than one page. Even if this means truncating. The files in question are scheduled to be moved over to debugfs in the future anyway. Based on initial patches from Neil Brown and Linus Torvalds Reported-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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- 20 Mar, 2010 2 commits
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Pablo Neira Ayuso authored
This patch fixes a bug that allows to lose events when reliable event delivery mode is used, ie. if NETLINK_BROADCAST_SEND_ERROR and NETLINK_RECV_NO_ENOBUFS socket options are set. Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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