kernel/linux.git, branch v4.8.15

Linux 4.8.15

2016-12-15T16:50:48+00:00

crypto: rsa - Add Makefile dependencies to fix parallel builds

2016-12-15T16:50:36+00:00

commit 57891633eeef60e732e045731cf20e50ee80acb4 upstream. Both asn1 headers are included by rsa_helper.c, so rsa_helper.o should explicitly depend on them. Signed-off-by: David Michael Signed-off-by: Herbert Xu Cc: Tuomas Tynkkynen Signed-off-by: Greg Kroah-Hartman

hotplug: Make register and unregister notifier API symmetric

2016-12-15T16:50:36+00:00

commit 777c6e0daebb3fcefbbd6f620410a946b07ef6d0 upstream. Yu Zhao has noticed that __unregister_cpu_notifier only unregisters its notifiers when HOTPLUG_CPU=y while the registration might succeed even when HOTPLUG_CPU=n if MODULE is enabled. This means that e.g. zswap might keep a stale notifier on the list on the manual clean up during the pool tear down and thus corrupt the list. Resulting in the following [ 144.964346] BUG: unable to handle kernel paging request at ffff880658a2be78 [ 144.971337] IP: [] raw_notifier_chain_register+0x1b/0x40 [ 145.122628] Call Trace: [ 145.125086] [] __register_cpu_notifier+0x18/0x20 [ 145.131350] [] zswap_pool_create+0x273/0x400 [ 145.137268] [] __zswap_param_set+0x1fc/0x300 [ 145.143188] [] ? trace_hardirqs_on+0xd/0x10 [ 145.149018] [] ? kernel_param_lock+0x28/0x30 [ 145.154940] [] ? __might_fault+0x4f/0xa0 [ 145.160511] [] zswap_compressor_param_set+0x17/0x20 [ 145.167035] [] param_attr_store+0x5c/0xb0 [ 145.172694] [] module_attr_store+0x1d/0x30 [ 145.178443] [] sysfs_kf_write+0x4f/0x70 [ 145.183925] [] kernfs_fop_write+0x149/0x180 [ 145.189761] [] __vfs_write+0x18/0x40 [ 145.194982] [] vfs_write+0xb2/0x1a0 [ 145.200122] [] SyS_write+0x52/0xa0 [ 145.205177] [] entry_SYSCALL_64_fastpath+0x12/0x17 This can be even triggered manually by changing /sys/module/zswap/parameters/compressor multiple times. Fix this issue by making unregister APIs symmetric to the register so there are no surprises. Fixes: 47e627bc8c9a ("[PATCH] hotplug: Allow modules to use the cpu hotplug notifiers even if !CONFIG_HOTPLUG_CPU") Reported-and-tested-by: Yu Zhao Signed-off-by: Michal Hocko Cc: linux-mm@kvack.org Cc: Andrew Morton Cc: Dan Streetman Link: http://lkml.kernel.org/r/20161207135438.4310-1-mhocko@kernel.org Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

batman-adv: Check for alloc errors when preparing TT local data

2016-12-15T16:50:36+00:00

commit c2d0f48a13e53b4747704c9e692f5e765e52041a upstream. batadv_tt_prepare_tvlv_local_data can fail to allocate the memory for the new TVLV block. The caller is informed about this problem with the returned length of 0. Not checking this value results in an invalid memory access when either tt_data or tt_change is accessed. Reported-by: Dan Carpenter Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific") Signed-off-by: Sven Eckelmann Signed-off-by: Simon Wunderlich Signed-off-by: Greg Kroah-Hartman

m68k: Fix ndelay() macro

2016-12-15T16:50:36+00:00

commit 7e251bb21ae08ca2e4fb28cc0981fac2685a8efa upstream. The current ndelay() macro definition has an extra semi-colon at the end of the line thus leading to a compilation error when ndelay is used in a conditional block without curly braces like this one: if (cond) ndelay(t); else ... which, after the preprocessor pass gives: if (cond) m68k_ndelay(t);; else ... thus leading to the following gcc error: error: 'else' without a previous 'if' Remove this extra semi-colon. Signed-off-by: Boris Brezillon Fixes: c8ee038bd1488 ("m68k: Implement ndelay() based on the existing udelay() logic") Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

ceph: don't set req->r_locked_dir in ceph_d_revalidate

2016-12-15T16:50:36+00:00

commit c3f4688a08fd86f1bf8e055724c84b7a40a09733 upstream. This function sets req->r_locked_dir which is supposed to indicate to ceph_fill_trace that the parent's i_rwsem is locked for write. Unfortunately, there is no guarantee that the dir will be locked when d_revalidate is called, so we really don't want ceph_fill_trace to do any dcache manipulation from this context. Clear req->r_locked_dir since it's clearly not safe to do that. What we really want to know with d_revalidate is whether the dentry still points to the same inode. ceph_fill_trace installs a pointer to the inode in req->r_target_inode, so we can just compare that to d_inode(dentry) to see if it's the same one after the lookup. Also, since we aren't generally interested in the parent here, we can switch to using a GETATTR to hint that to the MDS, which also means that we only need to reserve one cap. Finally, just remove the d_unhashed check. That's really outside the purview of a filesystem's d_revalidate. If the thing became unhashed while we're checking it, then that's up to the VFS to handle anyway. Fixes: 200fd27c8fa2 ("ceph: use lookup request to revalidate dentry") Link: http://tracker.ceph.com/issues/18041 Reported-by: Donatas Abraitis Signed-off-by: Jeff Layton Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov Signed-off-by: Greg Kroah-Hartman

ARM: dts: imx7d: fix LCDIF clock assignment

2016-12-15T16:50:36+00:00

commit 4b707fa00a80b19b80bc8df6f1cbf4bdd9c91402 upstream. The eLCDIF IP of the i.MX 7 SoC knows multiple clocks and lists them separately: Clock Clock Root Description apb_clk MAIN_AXI_CLK_ROOT AXI clock pix_clk LCDIF_PIXEL_CLK_ROOT Pixel clock ipg_clk_s MAIN_AXI_CLK_ROOT Peripheral access clock All of them are switched by a single gate, which is part of the IMX7D_LCDIF_PIXEL_ROOT_CLK clock. Hence using that clock also for the AXI bus clock (clock-name "axi") makes sure the gate gets enabled when accessing registers. There seem to be no separate AXI display clock, and the clock is optional. Hence remove the dummy clock. This fixes kernel freezes when starting the X-Server (which disables/re-enables the display controller). Fixes: e8ed73f691bd ("ARM: dts: imx7d: add lcdif support") Signed-off-by: Stefan Agner Reviewed-by: Fabio Estevam Acked-by: Shawn Guo Signed-off-by: Olof Johansson Signed-off-by: Greg Kroah-Hartman

ARM: dts: orion5x: fix number of sata port for linkstation ls-gl

2016-12-15T16:50:36+00:00

commit 038ccb3e8cee52e07dc118ff99f47eaebc1d0746 upstream. Bug report from Debian [0] shows there's minor changed model of Linkstation LS-GL that uses the 2nd SATA port of the SoC. So it's necessary to enable two SATA ports, though for that specific model only the 2nd one is used. [0] https://bugs.debian.org/845611 Fixes: b1742ffa9ddb ("ARM: dts: orion5x: add device tree for buffalo linkstation ls-gl") Reported-by: Ryan Tandy Tested-by: Ryan Tandy Signed-off-by: Roger Shimizu Signed-off-by: Gregory CLEMENT Signed-off-by: Greg Kroah-Hartman

Revert "ACPI: Execute _PTS before system reboot"

2016-12-15T16:50:36+00:00

commit 9713adc2a1a5488f4889c657a0c0ce0c16056d3c upstream. Revert commit 2c85025c75df (ACPI: Execute _PTS before system reboot) as it is reported to cause poweroff and reboot to hang on Dell Latitude E7250. Link: https://bugzilla.kernel.org/show_bug.cgi?id=187061 Reported-by: Gianpaolo Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

can: peak: fix bad memory access and free sequence

2016-12-15T16:50:36+00:00

commit b67d0dd7d0dc9e456825447bbeb935d8ef43ea7c upstream. Fix for bad memory access while disconnecting. netdev is freed before private data free, and dev is accessed after freeing netdev. This makes a slub problem, and it raise kernel oops with slub debugger config. Signed-off-by: Jiho Chu Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman