- 04 Dec, 2013 40 commits
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Frank Zago authored
commit 0ee005c7 upstream. This will leave a lock held after reading from the device, preventing any further reads. Signed-off-by:
Frank Zago <frank@zago.net> Signed-off-by:
Jonathan Cameron <jic23@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Neuling authored
commit ec67ad82 upstream. In a recent patch: commit c13f20ac Author: Michael Neuling <mikey@neuling.org> powerpc/signals: Mark VSX not saved with small contexts We fixed an issue but an improved solution was later discussed after the patch was merged. Firstly, this patch doesn't handle the 64bit signals case, which could also hit this issue (but has never been reported). Secondly, the original patch isn't clear what MSR VSX should be set to. The new approach below always clears the MSR VSX bit (to indicate no VSX is in the context) and sets it only in the specific case where VSX is available (ie. when VSX has been used and the signal context passed has space to provide the state). This reverts the original patch and replaces it with the improved solution. It also adds a 64 bit version. Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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David Herrmann authored
commit 80897aa7 upstream. UHID allows short writes so user-space can omit unused fields. We automatically set them to 0 in the kernel. However, the 64/32 bit compat-handler didn't do that in the UHID_CREATE fallback. This will reveal random kernel heap data (of random size, even) to user-space. Fixes: befde022 ('HID: uhid: make creating devices work on 64/32 systems') Reported-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
David Herrmann <dh.herrmann@gmail.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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NeilBrown authored
commit 02e5f5c0 upstream. The various ->run routines of md personalities assume that the 'queue' has been initialised by the blk_set_stacking_limits() call in md_alloc(). However when the level is changed (by level_store()) the ->run routine for the new level is called for an array which has already had the stacking limits modified. This can result in incorrect final settings. So call blk_set_stacking_limits() before ->run in level_store(). A specific consequence of this bug is that it causes discard_granularity to be set incorrectly when reshaping a RAID4 to a RAID0. This is suitable for any -stable kernel since 3.3 in which blk_set_stacking_limits() was introduced. Reported-and-tested-by:
"Baldysiak, Pawel" <pawel.baldysiak@intel.com> Signed-off-by:
NeilBrown <neilb@suse.de> Signed-off-by:
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Steve French authored
commit b1d93356 upstream. setfacl over cifs mounts can remove the default ACL when setting the (non-default part of) the ACL and vice versa (we were leaving at 0 rather than setting to -1 the count field for the unaffected half of the ACL. For example notice the setfacl removed the default ACL in this sequence: steven@steven-GA-970A-DS3:~/cifs-2.6$ getfacl /mnt/test-dir ; setfacl -m default:user:test:rwx,user:test:rwx /mnt/test-dir getfacl: Removing leading '/' from absolute path names user::rwx group::r-x other::r-x default:user::rwx default:user:test:rwx default:group::r-x default:mask::rwx default:other::r-x steven@steven-GA-970A-DS3:~/cifs-2.6$ getfacl /mnt/test-dir getfacl: Removing leading '/' from absolute path names user::rwx user:test:rwx group::r-x mask::rwx other::r-x Signed-off-by:
Steve French <smfrench@gmail.com> Acked-by:
Jeremy Allison <jra@samba.org> Signed-off-by:
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Robert Richter authored
commit a72b8859 upstream. Register and enable interrupts after the edac registration. Otherwise incomming ecc error interrupts lead to crashes during device setup. Fixing this in drivers for mc and l2. Signed-off-by:
Robert Richter <robert.richter@linaro.org> Acked-by:
Rob Herring <rob.herring@calxeda.com> Signed-off-by:
Robert Richter <rric@kernel.org> Signed-off-by:
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Jerome Glisse authored
commit 97b6ff6b upstream. GPU with low amount of ram can fails at pinning new framebuffer before unpinning old one. On such failure, retry with unpinning old one before pinning new one allowing to work around the issue. This is somewhat ugly but only affect those old GPU we care about. Signed-off-by:
Jerome Glisse <jglisse@redhat.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Alex Deucher authored
commit 70471860 upstream. Sharing PPLLs seems to cause problems on some boards. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=45334Signed-off-by:
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Christian König authored
commit c154a763 upstream. Make sure the UVD clocks are still active before sending the destroy message, otherwise the hw might hang. Signed-off-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
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Alex Deucher authored
commit d5693761 upstream. Typo in the register offset. Noticed-by:
Sylvain BERTRAND <sylware@legeek.net> Signed-off-by:
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Ben Skeggs authored
commit 9360bd11 upstream. Signed-off-by:
Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
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Daniel Vetter authored
commit b2ea8ef5 upstream. Apparently they need the same treatment as primary planes. This fixes modesetting failures because of stuck cursors (!) on Thomas' i830M machine. I've figured while at it I'll also roll it out for the ivb 3 pipe version of this function. I didn't do this for i845/i865 since Bspec says the update mechanism works differently, and there's some additional rules about what can be updated in which order. Tested-by:
Thomas Richter <thor@math.tu-berlin.de> Cc: Thomas Richter <thor@math.tu-berlin.de> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Thomas Hellstrom authored
commit da95c788 upstream. All error paths will want to keep the mm node, so handle this at the function exit. This fixes an ioremap failure error path. Also add some comments to make the function a bit easier to understand. Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Jakob Bornecrantz <jakob@vmware.com> Signed-off-by:
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Jakob Bornecrantz authored
commit 9a0599dd upstream. Fix the case where the ttm pointer may be NULL causing a NULL pointer dereference. Signed-off-by:
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Thomas Hellstrom authored
commit 59c8e663 upstream. Also check the busy placements before deciding to move a buffer object. Failing to do this may result in a completely unneccessary move within a single memory type. Signed-off-by:
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Steven Rostedt (Red Hat) authored
commit 8a56d776 upstream. Commit 8c4f3c3f "ftrace: Check module functions being traced on reload" fixed module loading and unloading with respect to function tracing, but it missed the function graph tracer. If you perform the following # cd /sys/kernel/debug/tracing # echo function_graph > current_tracer # modprobe nfsd # echo nop > current_tracer You'll get the following oops message: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 2910 at /linux.git/kernel/trace/ftrace.c:1640 __ftrace_hash_rec_update.part.35+0x168/0x1b9() Modules linked in: nfsd exportfs nfs_acl lockd ipt_MASQUERADE sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables uinput snd_hda_codec_idt CPU: 2 PID: 2910 Comm: bash Not tainted 3.13.0-rc1-test #7 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M., BIOS SDBLI944.86P 05/08/2007 0000000000000668 ffff8800787efcf8 ffffffff814fe193 ffff88007d500000 0000000000000000 ffff8800787efd38 ffffffff8103b80a 0000000000000668 ffffffff810b2b9a ffffffff81a48370 0000000000000001 ffff880037aea000 Call Trace: [<ffffffff814fe193>] dump_stack+0x4f/0x7c [<ffffffff8103b80a>] warn_slowpath_common+0x81/0x9b [<ffffffff810b2b9a>] ? __ftrace_hash_rec_update.part.35+0x168/0x1b9 [<ffffffff8103b83e>] warn_slowpath_null+0x1a/0x1c [<ffffffff810b2b9a>] __ftrace_hash_rec_update.part.35+0x168/0x1b9 [<ffffffff81502f89>] ? __mutex_lock_slowpath+0x364/0x364 [<ffffffff810b2cc2>] ftrace_shutdown+0xd7/0x12b [<ffffffff810b47f0>] unregister_ftrace_graph+0x49/0x78 [<ffffffff810c4b30>] graph_trace_reset+0xe/0x10 [<ffffffff810bf393>] tracing_set_tracer+0xa7/0x26a [<ffffffff810bf5e1>] tracing_set_trace_write+0x8b/0xbd [<ffffffff810c501c>] ? ftrace_return_to_handler+0xb2/0xde [<ffffffff811240a8>] ? __sb_end_write+0x5e/0x5e [<ffffffff81122aed>] vfs_write+0xab/0xf6 [<ffffffff8150a185>] ftrace_graph_caller+0x85/0x85 [<ffffffff81122dbd>] SyS_write+0x59/0x82 [<ffffffff8150a185>] ftrace_graph_caller+0x85/0x85 [<ffffffff8150a2d2>] system_call_fastpath+0x16/0x1b ---[ end trace 940358030751eafb ]--- The above mentioned commit didn't go far enough. Well, it covered the function tracer by adding checks in __register_ftrace_function(). The problem is that the function graph tracer circumvents that (for a slight efficiency gain when function graph trace is running with a function tracer. The gain was not worth this). The problem came with ftrace_startup() which should always be called after __register_ftrace_function(), if you want this bug to be completely fixed. Anyway, this solution moves __register_ftrace_function() inside of ftrace_startup() and removes the need to call them both. Reported-by:
Dave Wysochanski <dwysocha@redhat.com> Fixes: ed926f9b ("ftrace: Use counters to enable functions to trace") Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Dan Williams authored
commit 8e3ffa47 upstream. Userspace uses the netdev devtype for stuff like device naming and type detection. Be nice and set it. Remove the pointless #if/#endif around SET_NETDEV_DEV too. Signed-off-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Andreas Bießmann authored
commit d617b338 upstream. This patch fixes following error (for big kernels): ---8<--- arch/avr32/boot/u-boot/head.o: In function `no_tag_table': (.init.text+0x44): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o arch/avr32/kernel/built-in.o: In function `bad_return': (.ex.text+0x236): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o --->8--- It comes up when the kernel increases and 'panic()' is too far away to fit in the +/- 2MiB range. Which in turn issues from the 21-bit displacement in 'br{cond4}' mnemonic which is one of the two ways to do jumps (rjmp has just 10-bit displacement and therefore a way smaller range). This fact was stated before in 8d29b7b9. One solution to solve this is to add a local storage for the symbol address and just load the $pc with that value. Signed-off-by:
Andreas Bießmann <andreas@biessmann.de> Acked-by:
Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by:
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Andreas Bießmann authored
commit 7a2a74f4 upstream. Before the CRT was (fully) set up in kernel_entry (bss cleared before in _start, but also not before jump to panic() in no_tag_table case). This patch fixes this up to have a fully working CRT when branching to panic() in no_tag_table. Signed-off-by:
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Paul Moore authored
commit 42d64e1a upstream. The SELinux/NetLabel glue code has a locking bug that affects systems with NetLabel enabled, see the kernel error message below. This patch corrects this problem by converting the bottom half socket lock to a more conventional, and correct for this call-path, lock_sock() call. =============================== [ INFO: suspicious RCU usage. ] 3.11.0-rc3+ #19 Not tainted ------------------------------- net/ipv4/cipso_ipv4.c:1928 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 2 locks held by ping/731: #0: (slock-AF_INET/1){+.-...}, at: [...] selinux_netlbl_socket_connect #1: (rcu_read_lock){.+.+..}, at: [<...>] netlbl_conn_setattr stack backtrace: CPU: 1 PID: 731 Comm: ping Not tainted 3.11.0-rc3+ #19 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 0000000000000001 ffff88006f659d28 ffffffff81726b6a ffff88003732c500 ffff88006f659d58 ffffffff810e4457 ffff88006b845a00 0000000000000000 000000000000000c ffff880075aa2f50 ffff88006f659d90 ffffffff8169bec7 Call Trace: [<ffffffff81726b6a>] dump_stack+0x54/0x74 [<ffffffff810e4457>] lockdep_rcu_suspicious+0xe7/0x120 [<ffffffff8169bec7>] cipso_v4_sock_setattr+0x187/0x1a0 [<ffffffff8170f317>] netlbl_conn_setattr+0x187/0x190 [<ffffffff8170f195>] ? netlbl_conn_setattr+0x5/0x190 [<ffffffff8131ac9e>] selinux_netlbl_socket_connect+0xae/0xc0 [<ffffffff81303025>] selinux_socket_connect+0x135/0x170 [<ffffffff8119d127>] ? might_fault+0x57/0xb0 [<ffffffff812fb146>] security_socket_connect+0x16/0x20 [<ffffffff815d3ad3>] SYSC_connect+0x73/0x130 [<ffffffff81739a85>] ? sysret_check+0x22/0x5d [<ffffffff810e5e2d>] ? trace_hardirqs_on_caller+0xfd/0x1c0 [<ffffffff81373d4e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [<ffffffff815d52be>] SyS_connect+0xe/0x10 [<ffffffff81739a59>] system_call_fastpath+0x16/0x1b Signed-off-by:
Paul Moore <pmoore@redhat.com> Signed-off-by:
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Toshi Kani authored
commit ca499fc8 upstream. The PCI host bridge scan handler installs its own notify handler, handle_hotplug_event_root(), by itself. Nevertheless, the ACPI hotplug framework also installs the common notify handler, acpi_hotplug_notify_cb(), for PCI root bridges. This causes acpi_hotplug_notify_cb() to call _OST method with unsupported error as hotplug.enabled is not set. To address this issue, introduce hotplug.ignore flag, which indicates that the scan handler installs its own notify handler by itself. The ACPI hotplug framework does not install the common notify handler when this flag is set. Signed-off-by:
Toshi Kani <toshi.kani@hp.com> [rjw: Changed the name of the new flag] Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Yinghai Lu authored
commit e7cc5cf7 upstream. The pcie_portdrv .probe() method calls pci_enable_device() once, in pcie_port_device_register(), but the .remove() method calls pci_disable_device() twice, in pcie_port_device_remove() and in pcie_portdrv_remove(). That causes a "disabling already-disabled device" warning when removing a PCIe port device. This happens all the time when removing Thunderbolt devices, but is also easy to reproduce with, e.g., "echo 0000:00:1c.3 > /sys/bus/pci/drivers/pcieport/unbind" This patch removes the disable from pcie_portdrv_remove(). [bhelgaas: changelog, tag for stable] Reported-by:
David Bulkow <David.Bulkow@stratus.com> Reported-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by:
Yinghai Lu <yinghai@kernel.org> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
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Jeff Layton authored
commit d3aea84a upstream. ...to make it clear what the intent behind each record's operation was. In many cases you can infer this, based on the context of the syscall and the result. In other cases it's not so obvious. For instance, in the case where you have a file being renamed over another, you'll have two different records with the same filename but different inode info. By logging this information we can clearly tell which one was created and which was deleted. This fixes what was broken in commit bfcec708. Commit 79f6530c should also be backported to stable v3.7+. Signed-off-by:
Jeff Layton <jlayton@redhat.com> Signed-off-by:
Eric Paris <eparis@redhat.com> Signed-off-by:
Richard Guy Briggs <rgb@redhat.com> Signed-off-by:
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Jeff Layton authored
commit 14e972b4 upstream. Historically, when a syscall that creates a dentry fails, you get an audit record that looks something like this (when trying to create a file named "new" in "/tmp/tmp.SxiLnCcv63"): type=PATH msg=audit(1366128956.279:965): item=0 name="/tmp/tmp.SxiLnCcv63/new" inode=2138308 dev=fd:02 mode=040700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmp_t:s15:c0.c1023 This record makes no sense since it's associating the inode information for "/tmp/tmp.SxiLnCcv63" with the path "/tmp/tmp.SxiLnCcv63/new". The recent patch I posted to fix the audit_inode call in do_last fixes this, by making it look more like this: type=PATH msg=audit(1366128765.989:13875): item=0 name="/tmp/tmp.DJ1O8V3e4f/" inode=141 dev=fd:02 mode=040700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmp_t:s15:c0.c1023 While this is more correct, if the creation of the file fails, then we have no record of the filename that the user tried to create. This patch adds a call to audit_inode_child to may_create. This creates an AUDIT_TYPE_CHILD_CREATE record that will sit in place until the create succeeds. When and if the create does succeed, then this record will be updated with the correct inode info from the create. This fixes what was broken in commit bfcec708. Commit 79f6530c should also be backported to stable v3.7+. Signed-off-by:
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Jeff Layton authored
commit 79f6530c upstream. The old audit PATH records for mq_open looked like this: type=PATH msg=audit(1366282323.982:869): item=1 name=(null) inode=6777 dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282323.982:869): item=0 name="test_mq" inode=26732 dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023 ...with the audit related changes that went into 3.7, they now look like this: type=PATH msg=audit(1366282236.776:3606): item=2 name=(null) inode=66655 dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282236.776:3606): item=1 name=(null) inode=6926 dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282236.776:3606): item=0 name="test_mq" Both of these look wrong to me. As Steve Grubb pointed out: "What we need is 1 PATH record that identifies the MQ. The other PATH records probably should not be there." Fix it to record the mq root as a parent, and flag it such that it should be hidden from view when the names are logged, since the root of the mq filesystem isn't terribly interesting. With this change, we get a single PATH record that looks more like this: type=PATH msg=audit(1368021604.836:484): item=0 name="test_mq" inode=16914 dev=00:0c mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmpfs_t:s0 In order to do this, a new audit_inode_parent_hidden() function is added. If we do it this way, then we avoid having the existing callers of audit_inode needing to do any sort of flag conversion if auditing is inactive. Signed-off-by:
Jiri Jaburek <jjaburek@redhat.com> Cc: Steve Grubb <sgrubb@redhat.com> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Mathias Krause authored
commit 64fbff9a upstream. We leak 4 bytes of kernel stack in response to an AUDIT_GET request as we miss to initialize the mask member of status_set. Fix that. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Signed-off-by:
Mathias Krause <minipli@googlemail.com> Signed-off-by:
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Mathias Krause authored
commit 4d8fe737 upstream. Using the nlmsg_len member of the netlink header to test if the message is valid is wrong as it includes the size of the netlink header itself. Thereby allowing to send short netlink messages that pass those checks. Use nlmsg_len() instead to test for the right message length. The result of nlmsg_len() is guaranteed to be non-negative as the netlink message already passed the checks of nlmsg_ok(). Also switch to min_t() to please checkpatch.pl. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Signed-off-by:
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Tyler Hicks authored
commit 0868a5e1 upstream. When the audit=1 kernel parameter is absent and auditd is not running, AUDIT_USER_AVC messages are being silently discarded. AUDIT_USER_AVC messages should be sent to userspace using printk(), as mentioned in the commit message of 4a4cd633 ("AUDIT: Optimise the audit-disabled case for discarding user messages"). When audit_enabled is 0, audit_receive_msg() discards all user messages except for AUDIT_USER_AVC messages. However, audit_log_common_recv_msg() refuses to allocate an audit_buffer if audit_enabled is 0. The fix is to special case AUDIT_USER_AVC messages in both functions. It looks like commit 50397bd1 ("[AUDIT] clean up audit_receive_msg()") introduced this bug. Signed-off-by:
Tyler Hicks <tyhicks@canonical.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Cc: linux-audit@redhat.com Acked-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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Ujjal Roy authored
commit 8d93f1f3 upstream. The eth_hdr is never defined in this driver but it gets compiled without any warning/error because kernel has defined eth_hdr. Fix it by defining our own p_ethhdr and use it instead of eth_hdr. Signed-off-by:
Ujjal Roy <royujjal@gmail.com> Signed-off-by:
Amitkumar Karwar <akarwar@marvell.com> Signed-off-by:
Bing Zhao <bzhao@marvell.com> Signed-off-by:
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Avinash Patil authored
commit d03b4aa7 upstream. While receiving a packet on SDIO interface, we allocate skb with size multiple of SDIO block size. We need to resize this skb after RX using packet length from RX header. Signed-off-by:
Avinash Patil <patila@marvell.com> Signed-off-by:
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Dave Airlie authored
commit cc87509d upstream. If we are using deferred io due to plymouth or X.org fbdev driver we will oops in memcpy due to this pointless multiply here, removing it fixes fbdev to start and not oops. Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
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Rafael J. Wysocki authored
commit baab52de upstream. Commit fa180eb4 (PM / Runtime: Idle devices asynchronously after probe|release) modified __device_release_driver() to call pm_runtime_put(dev) instead of pm_runtime_put_sync(dev) before detaching the driver from the device. However, that was a mistake, because pm_runtime_put(dev) causes rpm_idle() to be queued up and the driver may be gone already when that function is executed. That breaks the assumptions the drivers have the right to make about the core's behavior on the basis of the existing documentation and actually causes problems to happen, so revert that part of commit fa180eb4 and restore the previous behavior of __device_release_driver(). Reported-by:
Tomi Valkeinen <tomi.valkeinen@ti.com> Fixes: fa180eb4 (PM / Runtime: Idle devices asynchronously after probe|release) Signed-off-by:
Kevin Hilman <khilman@linaro.org> Acked-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Aaron Lu authored
commit fd432b9f upstream. When system has a lot of highmem (e.g. 16GiB using a 32 bits kernel), the code to calculate how much memory we need to preallocate in normal zone may cause overflow. As Leon has analysed: It looks that during computing 'alloc' variable there is overflow: alloc = (3943404 - 1970542) - 1978280 = -5418 (signed) And this function goes to err_out. Fix this by avoiding that overflow. References: https://bugzilla.kernel.org/show_bug.cgi?id=60817Reported-and-tested-by:
Leon Drugi <eyak@wp.pl> Signed-off-by:
Aaron Lu <aaron.lu@intel.com> Signed-off-by:
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Mikulas Patocka authored
commit fff4996b upstream. If blkcg_init_queue fails, blk_alloc_queue_node doesn't call bdi_destroy to clean up structures allocated by the backing dev. ------------[ cut here ]------------ WARNING: at lib/debugobjects.c:260 debug_print_object+0x85/0xa0() ODEBUG: free active (active state 0) object type: percpu_counter hint: (null) Modules linked in: dm_loop dm_mod ip6table_filter ip6_tables uvesafb cfbcopyarea cfbimgblt cfbfillrect fbcon font bitblit fbcon_rotate fbcon_cw fbcon_ud fbcon_ccw softcursor fb fbdev ipt_MASQUERADE iptable_nat nf_nat_ipv4 msr nf_conntrack_ipv4 nf_defrag_ipv4 xt_state ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc tun ipv6 cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative spadfs fuse hid_generic usbhid hid raid0 md_mod dmi_sysfs nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack lm85 hwmon_vid snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_hwdep snd_usbmidi_lib snd_rawmidi snd soundcore acpi_cpufreq freq_table mperf sata_svw serverworks kvm_amd ide_core ehci_pci ohci_hcd libata ehci_hcd kvm usbcore tg3 usb_common libphy k10temp pcspkr ptp i2c_piix4 i2c_core evdev microcode hwmon rtc_cmos pps_core e100 skge floppy mii processor button unix CPU: 0 PID: 2739 Comm: lvchange Tainted: G W 3.10.15-devel #14 Hardware name: empty empty/S3992-E, BIOS 'V1.06 ' 06/09/2009 0000000000000009 ffff88023c3c1ae8 ffffffff813c8fd4 ffff88023c3c1b20 ffffffff810399eb ffff88043d35cd58 ffffffff81651940 ffff88023c3c1bf8 ffffffff82479d90 0000000000000005 ffff88023c3c1b80 ffffffff81039a67 Call Trace: [<ffffffff813c8fd4>] dump_stack+0x19/0x1b [<ffffffff810399eb>] warn_slowpath_common+0x6b/0xa0 [<ffffffff81039a67>] warn_slowpath_fmt+0x47/0x50 [<ffffffff8122aaaf>] ? debug_check_no_obj_freed+0xcf/0x250 [<ffffffff81229a15>] debug_print_object+0x85/0xa0 [<ffffffff8122abe3>] debug_check_no_obj_freed+0x203/0x250 [<ffffffff8113c4ac>] kmem_cache_free+0x20c/0x3a0 [<ffffffff811f6709>] blk_alloc_queue_node+0x2a9/0x2c0 [<ffffffff811f672e>] blk_alloc_queue+0xe/0x10 [<ffffffffa04c0093>] dm_create+0x1a3/0x530 [dm_mod] [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod] [<ffffffffa04c6c07>] dev_create+0x57/0x2b0 [dm_mod] [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod] [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod] [<ffffffffa04c6528>] ctl_ioctl+0x268/0x500 [dm_mod] [<ffffffff81097662>] ? get_lock_stats+0x22/0x70 [<ffffffffa04c67ce>] dm_ctl_ioctl+0xe/0x20 [dm_mod] [<ffffffff81161aad>] do_vfs_ioctl+0x2ed/0x520 [<ffffffff8116cfc7>] ? fget_light+0x377/0x4e0 [<ffffffff81161d2b>] SyS_ioctl+0x4b/0x90 [<ffffffff813cff16>] system_call_fastpath+0x1a/0x1f ---[ end trace 4b5ff0d55673d986 ]--- ------------[ cut here ]------------ This fix should be backported to stable kernels starting with 2.6.37. Note that in the kernels prior to 3.5 the affected code is different, but the bug is still there - bdi_init is called and bdi_destroy isn't. Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Dan Williams authored
commit 21e96c73 upstream. When performing continuations there are implied sources that need to be added to the source count. Quoting dma_set_maxpq: /* dma_maxpq - reduce maxpq in the face of continued operations * @dma - dma device with PQ capability * @flags - to check if DMA_PREP_CONTINUE and DMA_PREP_PQ_DISABLE_P are set * * When an engine does not support native continuation we need 3 extra * source slots to reuse P and Q with the following coefficients: * 1/ {00} * P : remove P from Q', but use it as a source for P' * 2/ {01} * Q : use Q to continue Q' calculation * 3/ {00} * Q : subtract Q from P' to cancel (2) * * In the case where P is disabled we only need 1 extra source: * 1/ {01} * Q : use Q to continue Q' calculation */ ...fix the selection of the 16 source path to take these implied sources into account. Note this also kills the BUG_ON(src_cnt < 9) check in __ioat3_prep_pq16_lock(). Besides not accounting for implied sources the check is redundant given we already made the path selection. Cc: Dave Jiang <dave.jiang@intel.com> Acked-by:
Dave Jiang <dave.jiang@intel.com> Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
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Dan Williams authored
commit 5d48b9b5 upstream. The array to lookup the sed pool based on the number of sources (pq16_idx_to_sedi) is 16 entries and expects a max source index. However, we pass the total source count which runs off the end of the array when src_cnt == 16. The minimal fix is to just pass src_cnt-1, but given we know the source count is > 8 we can just calculate the sed pool by (src_cnt - 2) >> 3. Cc: Dave Jiang <dave.jiang@intel.com> Acked-by:
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Mikulas Patocka authored
commit f36afb39 upstream. dm-mpath and dm-thin must process messages even if some device is suspended, so we allocate argv buffer with GFP_NOIO. These messages have a small fixed number of arguments. On the other hand, dm-switch needs to process bulk data using messages so excessive use of GFP_NOIO could cause trouble. The patch also lowers the default number of arguments from 64 to 8, so that there is smaller load on GFP_NOIO allocations. Signed-off-by:
Alasdair G Kergon <agk@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Joe Thornber authored
commit 66cb1910 upstream. The code that was trying to do this was inadequate. The postsuspend method (in ioctl context), needs to wait for the worker thread to acknowledge the request to quiesce. Otherwise the migration count may drop to zero temporarily before the worker thread realises we're quiescing. In this case the target will be taken down, but the worker thread may have issued a new migration, which will cause an oops when it completes. Signed-off-by:
Joe Thornber <ejt@redhat.com> Signed-off-by:
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Joe Thornber authored
commit 9c1d4de5 upstream. Entries would be lost if the old tail block was partially filled. Signed-off-by:
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Shiva Krishna Merla authored
commit 954a73d5 upstream. Whenever multipath_dtr() is happening we must prevent queueing any further path activation work. Implement this by adding a new 'pg_init_disabled' flag to the multipath structure that denotes future path activation work should be skipped if it is set. By disabling pg_init and then re-enabling in flush_multipath_work() we also avoid the potential for pg_init to be initiated while suspending an mpath device. Without this patch a race condition exists that may result in a kernel panic: 1) If after pg_init_done() decrements pg_init_in_progress to 0, a call to wait_for_pg_init_completion() assumes there are no more pending path management commands. 2) If pg_init_required is set by pg_init_done(), due to retryable mode_select errors, then process_queued_ios() will again queue the path activation work. 3) If free_multipath() completes before activate_path() work is called a NULL pointer dereference like the following can be seen when accessing members of the recently destructed multipath: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 RIP: 0010:[<ffffffffa003db1b>] [<ffffffffa003db1b>] activate_path+0x1b/0x30 [dm_multipath] [<ffffffff81090ac0>] worker_thread+0x170/0x2a0 [<ffffffff81096c80>] ? autoremove_wake_function+0x0/0x40 [switch to disabling pg_init in flush_multipath_work & header edits by Mike Snitzer] Signed-off-by:
Shiva Krishna Merla <shivakrishna.merla@netapp.com> Reviewed-by:
Krishnasamy Somasundaram <somasundaram.krishnasamy@netapp.com> Tested-by:
Speagle Andy <Andy.Speagle@netapp.com> Acked-by:
Junichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by:
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