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- 15 Aug, 2012 1 commit
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Kevin Winchester authored
commit 141168c3 and commit 3f806e50 upstream. Several fields in struct cpuinfo_x86 were not defined for the !SMP case, likely to save space. However, those fields still have some meaning for UP, and keeping them allows some #ifdef removal from other files. The additional size of the UP kernel from this change is not significant enough to worry about keeping up the distinction: text data bss dec hex filename 4737168 506459 972040 6215667 5ed7f3 vmlinux.o.before 4737444 506459 972040 6215943 5ed907 vmlinux.o.after for a difference of 276 bytes for an example UP config. If someone wants those 276 bytes back badly then it should be implemented in a cleaner way. Signed-off-by:
Kevin Winchester <kjwinchester@gmail.com> Cc: Steffen Persvold <sp@numascale.com> Link: http://lkml.kernel.org/r/1324428742-12498-1-git-send-email-kjwinchester@gmail.comSigned-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Borislav Petkov <borislav.petkov@amd.com> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 09 Aug, 2012 39 commits
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Greg Kroah-Hartman authored
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Darren Hart authored
commit 6f7b0a2a upstream. If uaddr == uaddr2, then we have broken the rule of only requeueing from a non-pi futex to a pi futex with this call. If we attempt this, as the trinity test suite manages to do, we miss early wakeups as q.key is equal to key2 (because they are the same uaddr). We will then attempt to dereference the pi_mutex (which would exist had the futex_q been properly requeued to a pi futex) and trigger a NULL pointer dereference. Signed-off-by:
Darren Hart <dvhart@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Link: http://lkml.kernel.org/r/ad82bfe7f7d130247fbe2b5b4275654807774227.1342809673.git.dvhart@linux.intel.comSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Darren Hart authored
commit f27071cb upstream. The WARN_ON in futex_wait_requeue_pi() for a NULL q.pi_state was testing the address (&q.pi_state) of the pointer instead of the value (q.pi_state) of the pointer. Correct it accordingly. Signed-off-by:
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Darren Hart authored
commit b6070a8d upstream. If fixup_pi_state_owner() faults, pi_mutex may be NULL. Test for pi_mutex != NULL before testing the owner against current and possibly unlocking it. Signed-off-by:
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Mikael Pettersson authored
commit c6636005 upstream. Booting a 3.2, 3.3, or 3.4-rc4 kernel on an Atari using the `nfeth' ethernet device triggers a WARN_ONCE() in generic irq handling code on the first irq for that device: WARNING: at kernel/irq/handle.c:146 handle_irq_event_percpu+0x134/0x142() irq 3 handler nfeth_interrupt+0x0/0x194 enabled interrupts Modules linked in: Call Trace: [<000299b2>] warn_slowpath_common+0x48/0x6a [<000299c0>] warn_slowpath_common+0x56/0x6a [<00029a4c>] warn_slowpath_fmt+0x2a/0x32 [<0005b34c>] handle_irq_event_percpu+0x134/0x142 [<0005b34c>] handle_irq_event_percpu+0x134/0x142 [<0000a584>] nfeth_interrupt+0x0/0x194 [<001ba0a8>] schedule_preempt_disabled+0x0/0xc [<0005b37a>] handle_irq_event+0x20/0x2c [<0005add4>] generic_handle_irq+0x2c/0x3a [<00002ab6>] do_IRQ+0x20/0x32 [<0000289e>] auto_irqhandler_fixup+0x4/0x6 [<00003144>] cpu_idle+0x22/0x2e [<001b8a78>] printk+0x0/0x18 [<0024d112>] start_kernel+0x37a/0x386 [<0003021d>] __do_proc_dointvec+0xb1/0x366 [<0003021d>] __do_proc_dointvec+0xb1/0x366 [<0024c31e>] _sinittext+0x31e/0x9c0 After invoking the irq's handler the kernel sees !irqs_disabled() and concludes that the handler erroneously enabled interrupts. However, debugging shows that !irqs_disabled() is true even before the handler is invoked, which indicates a problem in the platform code rather than the specific driver. The warning does not occur in 3.1 or older kernels. It turns out that the ALLOWINT definition for Atari is incorrect. The Atari definition of ALLOWINT is ~0x400, the stated purpose of that is to avoid taking HSYNC interrupts. irqs_disabled() returns true if the 3-bit ipl & 4 is non-zero. The nfeth interrupt runs at ipl 3 (it's autovector 3), but 3 & 4 is zero so irqs_disabled() is false, and the warning above is generated. When interrupts are explicitly disabled, ipl is set to 7. When they are enabled, ipl is masked with ALLOWINT. On Atari this will result in ipl = 3, which blocks interrupts at ipl 3 and below. So how come nfeth interrupts at ipl 3 are received at all? That's because ipl is reset to 2 by Atari-specific code in default_idle(), again with the stated purpose of blocking HSYNC interrupts. This discrepancy means that ipl 3 can remain blocked for longer than intended. Both default_idle() and falcon_hblhandler() identify HSYNC with ipl 2, and the "Atari ST/.../F030 Hardware Register Listing" agrees, but ALLOWINT is defined as if HSYNC was ipl 3. [As an experiment I modified default_idle() to reset ipl to 3, and as expected that resulted in all nfeth interrupts being blocked.] The fix is simple: define ALLOWINT as ~0x500 instead. This makes arch_local_irq_enable() consistent with default_idle(), and prevents the !irqs_disabled() problems for ipl 3 interrupts. Tested on Atari running in an Aranym VM. Signed-off-by:
Mikael Pettersson <mikpe@it.uu.se> Tested-by:
Michael Schmitz <schmitzmic@googlemail.com> Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Andreas Schwab authored
commit 9e2760d1 upstream. User space access must always go through uaccess accessors, since on classic m68k user space and kernel space are completely separate. Signed-off-by:
Andreas Schwab <schwab@linux-m68k.org> Tested-by:
Thorsten Glaser <tg@debian.org> Signed-off-by:
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Mark Brown authored
commit b8edf3e5 upstream. Otherwise if someone tries to use all four channels on AIF1 with the device in master mode we won't be able to clock out all the data. Signed-off-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:
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Mark Brown authored
commit 9d40e558 upstream. Required for reliable power up from cold. Signed-off-by:
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Takashi Iwai authored
commit bc733d49 upstream. The irq field of struct snd_mpu401 is supposed to be initialized to -1. Since it's set to zero as of now, a probing error before the irq installation results in a kernel warning "Trying to free already-free IRQ 0". Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=44821Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Daniel Mack authored
commit aff252a8 upstream. uac_clock_source_is_valid() uses the control selector value to access the bmControls bitmap of the clock source unit. This is wrong, as control selector values start from 1, while the bitmap uses all available bits. In other words, "Clock Validity Control" is stored in D3..2, not D5..4 of the clock selector unit's bmControls. Signed-off-by:
Daniel Mack <zonque@gmail.com> Reported-by:
Andreas Koch <andreas@akdesigninc.com> Signed-off-by:
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Colin Ian King authored
commit f96a4216 upstream. The default 10 microsecond delay for the controller to come out of halt in dbgp_ehci_startup is too short, so increase it to 1 millisecond. This is based on emperical testing on various USB debug ports on modern machines such as a Lenovo X220i and an Ivybridge development platform that needed to wait ~450-950 microseconds. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Jason Wessel <jason.wessel@windriver.com> Signed-off-by:
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Mathias Krause authored
[ Upstream commits a117dacd and 8bbb1813 ] The tun module leaks up to 36 bytes of memory by not fully initializing a structure located on the stack that gets copied to user memory by the TUNGETIFF and SIOCGIFHWADDR ioctl()s. Signed-off-by:
Mathias Krause <minipli@googlemail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Jiri Kosina authored
[ Upstream commit 59ea33a6 ] Back in 2006, commit 1a2449a8 ("[I/OAT]: TCP recv offload to I/OAT") added support for receive offloading to IOAT dma engine if available. The code in tcp_rcv_established() tries to perform early DMA copy if applicable. It however does so without checking whether the userspace task is actually expecting the data in the buffer. This is not a problem under normal circumstances, but there is a corner case where this doesn't work -- and that's when MSG_TRUNC flag to recvmsg() is used. If the IOAT dma engine is not used, the code properly checks whether there is a valid ucopy.task and the socket is owned by userspace, but misses the check in the dmaengine case. This problem can be observed in real trivially -- for example 'tbench' is a good reproducer, as it makes a heavy use of MSG_TRUNC. On systems utilizing IOAT, you will soon find tbench waiting indefinitely in sk_wait_data(), as they have been already early-copied in tcp_rcv_established() using dma engine. This patch introduces the same check we are performing in the simple iovec copy case to the IOAT case as well. It fixes the indefinite recvmsg(MSG_TRUNC) hangs. Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Jiri Benc authored
[ Upstream commit b1beb681 ] When device flags are set using rtnetlink, IFF_PROMISC and IFF_ALLMULTI flags are handled specially. Function dev_change_flags sets IFF_PROMISC and IFF_ALLMULTI bits in dev->gflags according to the passed value but do_setlink passes a result of rtnl_dev_combine_flags which takes those bits from dev->flags. This can be easily trigerred by doing: tcpdump -i eth0 & ip l s up eth0 ip sets IFF_UP flag in ifi_flags and ifi_change, which is combined with IFF_PROMISC by rtnl_dev_combine_flags, causing __dev_change_flags to set IFF_PROMISC in gflags. Reported-by:
Max Matveev <makc@redhat.com> Signed-off-by:
Jiri Benc <jbenc@redhat.com> Signed-off-by:
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Dan Carpenter authored
[ Upstream commit e4c7f259 ] The problem is that we call this with a spin lock held. The call tree is: kaweth_start_xmit() holds kaweth->device_lock. -> kaweth_async_set_rx_mode() -> kaweth_control() -> kaweth_internal_control_msg() The kaweth_internal_control_msg() function is only called from kaweth_control() which used GFP_ATOMIC for its allocations. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Hangbin Liu authored
[ Upstream commit 42493570 ] TCP_USER_TIMEOUT is a TCP level socket option that takes an unsigned int. But patch "tcp: Add TCP_USER_TIMEOUT socket option"(dca43c75) didn't check the negative values. If a user assign -1 to it, the socket will set successfully and wait for 4294967295 miliseconds. This patch add a negative value check to avoid this issue. Signed-off-by:
Hangbin Liu <liuhangbin@gmail.com> Signed-off-by:
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Alan Cox authored
[ Upstream commit 8b72ff64 ] gcc really should warn about these ! Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
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Alan Cox authored
[ Upstream commit c66b9b7d ] Reported-by: <rucsoftsec@gmail.com> Resolves-bug: http://bugzilla.kernel.org/show_bug?44441Signed-off-by:
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Paul Moore authored
[ Upstream commit 89d7ae34 ] As reported by Alan Cox, and verified by Lin Ming, when a user attempts to add a CIPSO option to a socket using the CIPSO_V4_TAG_LOCAL tag the kernel dies a terrible death when it attempts to follow a NULL pointer (the skb argument to cipso_v4_validate() is NULL when called via the setsockopt() syscall). This patch fixes this by first checking to ensure that the skb is non-NULL before using it to find the incoming network interface. In the unlikely case where the skb is NULL and the user attempts to add a CIPSO option with the _TAG_LOCAL tag we return an error as this is not something we want to allow. A simple reproducer, kindly supplied by Lin Ming, although you must have the CIPSO DOI #3 configure on the system first or you will be caught early in cipso_v4_validate(): #include <sys/types.h> #include <sys/socket.h> #include <linux/ip.h> #include <linux/in.h> #include <string.h> struct local_tag { char type; char length; char info[4]; }; struct cipso { char type; char length; char doi[4]; struct local_tag local; }; int main(int argc, char **argv) { int sockfd; struct cipso cipso = { .type = IPOPT_CIPSO, .length = sizeof(struct cipso), .local = { .type = 128, .length = sizeof(struct local_tag), }, }; memset(cipso.doi, 0, 4); cipso.doi[3] = 3; sockfd = socket(AF_INET, SOCK_DGRAM, 0); #define SOL_IP 0 setsockopt(sockfd, SOL_IP, IP_OPTIONS, &cipso, sizeof(struct cipso)); return 0; } CC: Lin Ming <mlin@ss.pku.edu.cn> Reported-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
Paul Moore <pmoore@redhat.com> Signed-off-by:
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Sjur Brændeland authored
[ Upstream commit 96f80d12 ] unregister_netdevice_notifier() must be called before unregister_pernet_subsys() to avoid accessing already freed pernet memory. This fixes the following oops when doing rmmod: Call Trace: [<ffffffffa0f802bd>] caif_device_notify+0x4d/0x5a0 [caif] [<ffffffff81552ba9>] unregister_netdevice_notifier+0xb9/0x100 [<ffffffffa0f86dcc>] caif_device_exit+0x1c/0x250 [caif] [<ffffffff810e7734>] sys_delete_module+0x1a4/0x300 [<ffffffff810da82d>] ? trace_hardirqs_on_caller+0x15d/0x1e0 [<ffffffff813517de>] ? trace_hardirqs_on_thunk+0x3a/0x3 [<ffffffff81696bad>] system_call_fastpath+0x1a/0x1f RIP [<ffffffffa0f7f561>] caif_get+0x51/0xb0 [caif] Signed-off-by:
Sjur Brændeland <sjur.brandeland@stericsson.com> Acked-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Neil Horman authored
[ Upstream commit 2eebc1e1 ] A few days ago Dave Jones reported this oops: [22766.294255] general protection fault: 0000 [#1] PREEMPT SMP [22766.295376] CPU 0 [22766.295384] Modules linked in: [22766.387137] ffffffffa169f292 6b6b6b6b6b6b6b6b ffff880147c03a90 ffff880147c03a74 [22766.387135] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000 [22766.387136] Process trinity-watchdo (pid: 10896, threadinfo ffff88013e7d2000, [22766.387137] Stack: [22766.387140] ffff880147c03a10 [22766.387140] ffffffffa169f2b6 [22766.387140] ffff88013ed95728 [22766.387143] 0000000000000002 [22766.387143] 0000000000000000 [22766.387143] ffff880003fad062 [22766.387144] ffff88013c120000 [22766.387144] [22766.387145] Call Trace: [22766.387145] <IRQ> [22766.387150] [<ffffffffa169f292>] ? __sctp_lookup_association+0x62/0xd0 [sctp] [22766.387154] [<ffffffffa169f2b6>] __sctp_lookup_association+0x86/0xd0 [sctp] [22766.387157] [<ffffffffa169f597>] sctp_rcv+0x207/0xbb0 [sctp] [22766.387161] [<ffffffff810d4da8>] ? trace_hardirqs_off_caller+0x28/0xd0 [22766.387163] [<ffffffff815827e3>] ? nf_hook_slow+0x133/0x210 [22766.387166] [<ffffffff815902fc>] ? ip_local_deliver_finish+0x4c/0x4c0 [22766.387168] [<ffffffff8159043d>] ip_local_deliver_finish+0x18d/0x4c0 [22766.387169] [<ffffffff815902fc>] ? ip_local_deliver_finish+0x4c/0x4c0 [22766.387171] [<ffffffff81590a07>] ip_local_deliver+0x47/0x80 [22766.387172] [<ffffffff8158fd80>] ip_rcv_finish+0x150/0x680 [22766.387174] [<ffffffff81590c54>] ip_rcv+0x214/0x320 [22766.387176] [<ffffffff81558c07>] __netif_receive_skb+0x7b7/0x910 [22766.387178] [<ffffffff8155856c>] ? __netif_receive_skb+0x11c/0x910 [22766.387180] [<ffffffff810d423e>] ? put_lock_stats.isra.25+0xe/0x40 [22766.387182] [<ffffffff81558f83>] netif_receive_skb+0x23/0x1f0 [22766.387183] [<ffffffff815596a9>] ? dev_gro_receive+0x139/0x440 [22766.387185] [<ffffffff81559280>] napi_skb_finish+0x70/0xa0 [22766.387187] [<ffffffff81559cb5>] napi_gro_receive+0xf5/0x130 [22766.387218] [<ffffffffa01c4679>] e1000_receive_skb+0x59/0x70 [e1000e] [22766.387242] [<ffffffffa01c5aab>] e1000_clean_rx_irq+0x28b/0x460 [e1000e] [22766.387266] [<ffffffffa01c9c18>] e1000e_poll+0x78/0x430 [e1000e] [22766.387268] [<ffffffff81559fea>] net_rx_action+0x1aa/0x3d0 [22766.387270] [<ffffffff810a495f>] ? account_system_vtime+0x10f/0x130 [22766.387273] [<ffffffff810734d0>] __do_softirq+0xe0/0x420 [22766.387275] [<ffffffff8169826c>] call_softirq+0x1c/0x30 [22766.387278] [<ffffffff8101db15>] do_softirq+0xd5/0x110 [22766.387279] [<ffffffff81073bc5>] irq_exit+0xd5/0xe0 [22766.387281] [<ffffffff81698b03>] do_IRQ+0x63/0xd0 [22766.387283] [<ffffffff8168ee2f>] common_interrupt+0x6f/0x6f [22766.387283] <EOI> [22766.387284] [22766.387285] [<ffffffff8168eed9>] ? retint_swapgs+0x13/0x1b [22766.387285] Code: c0 90 5d c3 66 0f 1f 44 00 00 4c 89 c8 5d c3 0f 1f 00 55 48 89 e5 48 83 ec 20 48 89 5d e8 4c 89 65 f0 4c 89 6d f8 66 66 66 66 90 <0f> b7 87 98 00 00 00 48 89 fb 49 89 f5 66 c1 c0 08 66 39 46 02 [22766.387307] [22766.387307] RIP [22766.387311] [<ffffffffa168a2c9>] sctp_assoc_is_match+0x19/0x90 [sctp] [22766.387311] RSP <ffff880147c039b0> [22766.387142] ffffffffa16ab120 [22766.599537] ---[ end trace 3f6dae82e37b17f5 ]--- [22766.601221] Kernel panic - not syncing: Fatal exception in interrupt It appears from his analysis and some staring at the code that this is likely occuring because an association is getting freed while still on the sctp_assoc_hashtable. As a result, we get a gpf when traversing the hashtable while a freed node corrupts part of the list. Nominally I would think that an mibalanced refcount was responsible for this, but I can't seem to find any obvious imbalance. What I did note however was that the two places where we create an association using sctp_primitive_ASSOCIATE (__sctp_connect and sctp_sendmsg), have failure paths which free a newly created association after calling sctp_primitive_ASSOCIATE. sctp_primitive_ASSOCIATE brings us into the sctp_sf_do_prm_asoc path, which issues a SCTP_CMD_NEW_ASOC side effect, which in turn adds a new association to the aforementioned hash table. the sctp command interpreter that process side effects has not way to unwind previously processed commands, so freeing the association from the __sctp_connect or sctp_sendmsg error path would lead to a freed association remaining on this hash table. I've fixed this but modifying sctp_[un]hash_established to use hlist_del_init, which allows us to proerly use hlist_unhashed to check if the node is on a hashlist safely during a delete. That in turn alows us to safely call sctp_unhash_established in the __sctp_connect and sctp_sendmsg error paths before freeing them, regardles of what the associations state is on the hash list. I noted, while I was doing this, that the __sctp_unhash_endpoint was using hlist_unhsashed in a simmilar fashion, but never nullified any removed nodes pointers to make that function work properly, so I fixed that up in a simmilar fashion. I attempted to test this using a virtual guest running the SCTP_RR test from netperf in a loop while running the trinity fuzzer, both in a loop. I wasn't able to recreate the problem prior to this fix, nor was I able to trigger the failure after (neither of which I suppose is suprising). Given the trace above however, I think its likely that this is what we hit. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Reported-by: davej@redhat.com CC: davej@redhat.com CC: "David S. Miller" <davem@davemloft.net> CC: Vlad Yasevich <vyasevich@gmail.com> CC: Sridhar Samudrala <sri@us.ibm.com> CC: linux-sctp@vger.kernel.org Signed-off-by:
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Alan Cox authored
[ Upstream commit 7ac2908e ] Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=44461Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Michael Chan authored
[ Upstream commit c1f5163d ] In rare cases, bnx2x_free_tx_skbs() can unmap the wrong DMA address when it gets to the last entry of the tx ring. We were not using the proper macro to skip the last entry when advancing the tx index. Reported-by:
Zongyun Lai <zlai@vmware.com> Reviewed-by:
Jeffrey Huang <huangjw@broadcom.com> Signed-off-by:
Michael Chan <mchan@broadcom.com> Signed-off-by:
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Brian Foster authored
commit 97795d2a upstream. If we hit a condition where we have allocated metadata blocks that were not appropriately reserved, we risk underflow of ei->i_reserved_meta_blocks. In turn, this can throw sbi->s_dirtyclusters_counter significantly out of whack and undermine the nondelalloc fallback logic in ext4_nonda_switch(). Warn if this occurs and set i_allocated_meta_blocks to avoid this problem. This condition is reproduced by xfstests 270 against ext2 with delalloc enabled: Mar 28 08:58:02 localhost kernel: [ 171.526344] EXT4-fs (loop1): delayed block allocation failed for inode 14 at logical offset 64486 with max blocks 64 with error -28 Mar 28 08:58:02 localhost kernel: [ 171.526346] EXT4-fs (loop1): This should not happen!! Data will be lost 270 ultimately fails with an inconsistent filesystem and requires an fsck to repair. The cause of the error is an underflow in ext4_da_update_reserve_space() due to an unreserved meta block allocation. Signed-off-by:
Brian Foster <bfoster@redhat.com> Signed-off-by:
"Theodore Ts'o" <tytso@mit.edu> Signed-off-by:
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Theodore Ts'o authored
commit f6fb99ca upstream. Make it possible for ext4_count_free to operate on buffers and not just data in buffer_heads. Signed-off-by:
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Jeff Layton authored
commit 5cf02d09 upstream. We've had some reports of a deadlock where rpciod ends up with a stack trace like this: PID: 2507 TASK: ffff88103691ab40 CPU: 14 COMMAND: "rpciod/14" #0 [ffff8810343bf2f0] schedule at ffffffff814dabd9 #1 [ffff8810343bf3b8] nfs_wait_bit_killable at ffffffffa038fc04 [nfs] #2 [ffff8810343bf3c8] __wait_on_bit at ffffffff814dbc2f #3 [ffff8810343bf418] out_of_line_wait_on_bit at ffffffff814dbcd8 #4 [ffff8810343bf488] nfs_commit_inode at ffffffffa039e0c1 [nfs] #5 [ffff8810343bf4f8] nfs_release_page at ffffffffa038bef6 [nfs] #6 [ffff8810343bf528] try_to_release_page at ffffffff8110c670 #7 [ffff8810343bf538] shrink_page_list.clone.0 at ffffffff81126271 #8 [ffff8810343bf668] shrink_inactive_list at ffffffff81126638 #9 [ffff8810343bf818] shrink_zone at ffffffff8112788f #10 [ffff8810343bf8c8] do_try_to_free_pages at ffffffff81127b1e #11 [ffff8810343bf958] try_to_free_pages at ffffffff8112812f #12 [ffff8810343bfa08] __alloc_pages_nodemask at ffffffff8111fdad #13 [ffff8810343bfb28] kmem_getpages at ffffffff81159942 #14 [ffff8810343bfb58] fallback_alloc at ffffffff8115a55a #15 [ffff8810343bfbd8] ____cache_alloc_node at ffffffff8115a2d9 #16 [ffff8810343bfc38] kmem_cache_alloc at ffffffff8115b09b #17 [ffff8810343bfc78] sk_prot_alloc at ffffffff81411808 #18 [ffff8810343bfcb8] sk_alloc at ffffffff8141197c #19 [ffff8810343bfce8] inet_create at ffffffff81483ba6 #20 [ffff8810343bfd38] __sock_create at ffffffff8140b4a7 #21 [ffff8810343bfd98] xs_create_sock at ffffffffa01f649b [sunrpc] #22 [ffff8810343bfdd8] xs_tcp_setup_socket at ffffffffa01f6965 [sunrpc] #23 [ffff8810343bfe38] worker_thread at ffffffff810887d0 #24 [ffff8810343bfee8] kthread at ffffffff8108dd96 #25 [ffff8810343bff48] kernel_thread at ffffffff8100c1ca rpciod is trying to allocate memory for a new socket to talk to the server. The VM ends up calling ->releasepage to get more memory, and it tries to do a blocking commit. That commit can't succeed however without a connected socket, so we deadlock. Fix this by setting PF_FSTRANS on the workqueue task prior to doing the socket allocation, and having nfs_release_page check for that flag when deciding whether to do a commit call. Also, set PF_FSTRANS unconditionally in rpc_async_schedule since that function can also do allocations sometimes. Signed-off-by:
Jeff Layton <jlayton@redhat.com> Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
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J. Bruce Fields authored
commit 2930d381 upstream. Actually, xfs and jfs can optionally be case insensitive; we'll handle that case in later patches. Signed-off-by:
J. Bruce Fields <bfields@redhat.com> Signed-off-by:
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Jerome Glisse authored
commit ca2ccde5 upstream. To have DP behave like VGA/DVI we need to retrain the link on hotplug. For this to happen we need to force link training to happen by setting connector dpms to off before asking it turning it on again. v2: agd5f - drop the dp_get_link_status() change in atombios_dp.c for now. We still need the dpms OFF change. Signed-off-by:
Jerome Glisse <jglisse@redhat.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
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Jerome Glisse authored
commit 266dcba5 upstream. No need to retrain the link for passive adapters. v2: agd5f - no passive DP to VGA adapters, update comments - assign radeon_connector_atom_dig after we are sure we have a digital connector as analog connectors have different private data. - get new sink type before checking for retrain. No need to check if it's no longer a DP connection. Signed-off-by:
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Jerome Glisse authored
commit 8d1c702a upstream. We want to print link status query failed only if it's an unexepected fail. If we query to see if we need link training it might be because there is nothing connected and thus link status query have the right to fail in that case. To avoid printing failure when it's expected, move the failure message to proper place. Signed-off-by:
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Michel Dänzer authored
commit f60ec4c7 upstream. This could previously fail if either of the enabled displays was using a horizontal resolution that is a multiple of 128, and only the leftmost column of the cursor was (supposed to be) visible at the right edge of that display. The solution is to move the cursor one pixel to the left in that case. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=33183Signed-off-by:
Michel Dänzer <michel.daenzer@amd.com> Reviewed-by:
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Chris Mason authored
commit e9fbcb42 upstream. Each ordered operation has a free callback, and this was called with the worker spinlock held. Josef made the free callback also call iput, which we can't do with the spinlock. This drops the spinlock for the free operation and grabs it again before moving through the rest of the list. We'll circle back around to this and find a cleaner way that doesn't bounce the lock around so much. Signed-off-by:
Chris Mason <chris.mason@fusionio.com> Signed-off-by:
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Lan Tianyu authored
commit f197ac13 upstream. In the ac.c, power_supply_register()'s return value is not checked. As a result, the driver's add() ops may return success even though the device failed to initialize. For example, some BIOS may describe two ACADs in the same DSDT. The second ACAD device will fail to register, but ACPI driver's add() ops returns sucessfully. The ACPI device will receive ACPI notification and cause OOPS. https://bugzilla.redhat.com/show_bug.cgi?id=772730Signed-off-by:
Lan Tianyu <tianyu.lan@intel.com> Signed-off-by:
Len Brown <len.brown@intel.com> Signed-off-by:
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Tejun Heo authored
commit 65758202 upstream. Currently, all workqueue cpu hotplug operations run off CPU_PRI_WORKQUEUE which is higher than normal notifiers. This is to ensure that workqueue is up and running while bringing up a CPU before other notifiers try to use workqueue on the CPU. Per-cpu workqueues are supposed to remain working and bound to the CPU for normal CPU_DOWN_PREPARE notifiers. This holds mostly true even with workqueue offlining running with higher priority because workqueue CPU_DOWN_PREPARE only creates a bound trustee thread which runs the per-cpu workqueue without concurrency management without explicitly detaching the existing workers. However, if the trustee needs to create new workers, it creates unbound workers which may wander off to other CPUs while CPU_DOWN_PREPARE notifiers are in progress. Furthermore, if the CPU down is cancelled, the per-CPU workqueue may end up with workers which aren't bound to the CPU. While reliably reproducible with a convoluted artificial test-case involving scheduling and flushing CPU burning work items from CPU down notifiers, this isn't very likely to happen in the wild, and, even when it happens, the effects are likely to be hidden by the following successful CPU down. Fix it by using different priorities for up and down notifiers - high priority for up operations and low priority for down operations. Workqueue cpu hotplug operations will soon go through further cleanup. Signed-off-by:
Tejun Heo <tj@kernel.org> Acked-by:
"Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by:
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Paul Gortmaker authored
commit 2584f521 upstream. Also add information on where the respective trees are. Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by:
Rob Landley <rob@landley.net> Signed-off-by:
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Srivatsa S. Bhat authored
commit 443772d4 upstream. If function tracing is enabled for some of the low-level suspend/resume functions, it leads to triple fault during resume from suspend, ultimately ending up in a reboot instead of a resume (or a total refusal to come out of suspended state, on some machines). This issue was explained in more detail in commit f42ac38c (ftrace: disable tracing for suspend to ram). However, the changes made by that commit got reverted by commit cbe2f5a6 (tracing: allow tracing of suspend/resume & hibernation code again). So, unfortunately since things are not yet robust enough to allow tracing of low-level suspend/resume functions, suspend/resume is still broken when ftrace is enabled. So fix this by disabling function tracing during suspend/resume & hibernation. Signed-off-by:
Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by:
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J. Bruce Fields authored
commit 0ec4f431 upstream. The only checks of the long argument passed to fcntl(fd,F_SETLEASE,.) are done after converting the long to an int. Thus some illegal values may be let through and cause problems in later code. [ They actually *don't* cause problems in mainline, as of Dave Jones's commit 8d657eb3 "Remove easily user-triggerable BUG from generic_setlease", but we should fix this anyway. And this patch will be necessary to fix real bugs on earlier kernels. ] Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Kevin Cernekee authored
commit 31bde1ce upstream. A "usb0" interface that has never been connected to a host has an unknown operstate, and therefore the IFF_RUNNING flag is (incorrectly) asserted when queried by ifconfig, ifplugd, etc. This is a result of calling netif_carrier_off() too early in the probe function; it should be called after register_netdev(). Similar problems have been fixed in many other drivers, e.g.: e826eafa (bonding: Call netif_carrier_off after register_netdevice) 0d672e9f (drivers/net: Call netif_carrier_off at the end of the probe) 6a3c869a (cxgb4: fix reported state of interfaces without link) Fix is to move netif_carrier_off() to the end of the function. Signed-off-by:
Kevin Cernekee <cernekee@gmail.com> Signed-off-by:
Felipe Balbi <balbi@ti.com> Signed-off-by:
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Hans de Goede authored
commit 2102e06a upstream. iso data buffers may have holes in them if some packets were short, so for iso urbs we should always copy the entire buffer, just like the regular processcompl does. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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