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2016-05-17Merge branch 'ovl-fixes' into for-linusAl Viro
Backmerge to resolve a conflict in ovl_lookup_real(); "ovl_lookup_real(): use lookup_one_len_unlocked()" instead, but it was too late in the cycle to rebase.
2016-05-12ext4: switch to ->iterate_shared()Al Viro
Note that we need relax_dir() equivalent for directories locked shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12hfs: switch to ->iterate_shared()Al Viro
exact parallel of hfsplus analogue Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12hfsplus: switch to ->iterate_shared()Al Viro
We need to protect the list of hfsplus_readdir_data against parallel insertions (in readdir) and removals (in release). Add a spinlock for that. Note that it has nothing to do with protection of hfsplus_readdir_data->key - we have an exclusion between hfsplus_readdir() and hfsplus_delete_cat() on directory lock and between several hfsplus_readdir() for the same struct file on ->f_pos_lock. The spinlock is strictly for list changes. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12hostfs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12hpfs: switch to ->iterate_shared()Al Viro
NOTE: the only reason we can do that without ->i_rdir_offs races is that hpfs_lock() serializes everything in there anyway. It's not that hard to get rid of, but not as part of this series... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12hpfs: handle allocation failures in hpfs_add_pos()Al Viro
pr_err() is nice, but we'd better propagate the error to caller and not proceed to violate the invariants (namely, "every file with f_pos tied to directory block should have its address visible in per-inode array"). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-12gfs2: switch to ->iterate_shared()Al Viro
protected by glock and already used without locking the directory by gfs2_get_name() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-10ovl: ignore permissions on underlying lookupMiklos Szeredi
Generally permission checking is not necessary when overlayfs looks up a dentry on one of the underlying layers, since search permission on base directory was already checked in ovl_permission(). More specifically using lookup_one_len() causes a problem when the lower directory lacks search permission for a specific user while the upper directory does have search permission. Since lookups are cached, this causes inconsistency in behavior: success depends on who did the first lookup. So instead use lookup_hash() which doesn't do the permission check. Reported-by: Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-05-10vfs: add lookup_hash() helperMiklos Szeredi
Overlayfs needs lookup without inode_permission() and already has the name hash (in form of dentry->d_name on overlayfs dentry). It also doesn't support filesystems with d_op->d_hash() so basically it only needs the actual hashed lookup from lookup_one_len_unlocked() So add a new helper that does unlocked lookup of a hashed name. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-05-10vfs: rename: check backing inode being equalMiklos Szeredi
If a file is renamed to a hardlink of itself POSIX specifies that rename(2) should do nothing and return success. This condition is checked in vfs_rename(). However it won't detect hard links on overlayfs where these are given separate inodes on the overlayfs layer. Overlayfs itself detects this condition and returns success without doing anything, but then vfs_rename() will proceed as if this was a successful rename (detach_mounts(), d_move()). The correct thing to do is to detect this condition before even calling into overlayfs. This patch does this by calling vfs_select_inode() to get the underlying inodes. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: <stable@vger.kernel.org> # v4.2+
2016-05-10vfs: add vfs_select_inode() helperMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: <stable@vger.kernel.org> # v4.2+
2016-05-10f2fs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-10afs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-10befs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-10befs: constify stuff a bitAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09isofs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09get_acorn_filename(): deobfuscate a bitAl Viro
Lots of Idiotic Silly Parentheses is -> that way... What that condition checks is that there's exactly 32 bytes between the end of name and the end of entire drectory record. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09btrfs: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09logfs: no need to lock directory in lseekAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09switch ecryptfs to ->iterate_sharedAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09Merge branch 'for-linus' into work.lookupsAl Viro
2016-05-099p: switch to ->iterate_shared()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09fat: switch to ->iterate_shared()Al Viro
... and make that weird ioctl lock directory only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09romfs, squashfs: switch to ->iterate_shared()Al Viro
don't need to lock directory in ->llseek(), either Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09more trivial ->iterate_shared conversionsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09lustre: don't need to lock inode in directory lseekAl Viro
Note that lustre has its private mutex protecting directory pagecache; if they ever remove it, they'll need to be careful with PageChecked() use. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09kernfs: no point locking directory around that generic_file_llseek()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09configfs_readdir(): make safe under shared lockAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09nfs: per-name sillyunlink exclusionAl Viro
use d_alloc_parallel() for sillyunlink/lookup exclusion and explicit rwsem (nfs_rmdir() being a writer and nfs_call_unlink() - a reader) for rmdir/sillyunlink one. That ought to make lookup/readdir/!O_CREAT atomic_open really parallel on NFS. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-08Linux 4.6-rc7v4.6-rc7Linus Torvalds
2016-05-07get_rock_ridge_filename(): handle malformed NM entriesAl Viro
Payloads of NM entries are not supposed to contain NUL. When we run into such, only the part prior to the first NUL goes into the concatenation (i.e. the directory entry name being encoded by a bunch of NM entries). We do stop when the amount collected so far + the claimed amount in the current NM entry exceed 254. So far, so good, but what we return as the total length is the sum of *claimed* sizes, not the actual amount collected. And that can grow pretty large - not unlimited, since you'd need to put CE entries in between to be able to get more than the maximum that could be contained in one isofs directory entry / continuation chunk and we are stop once we'd encountered 32 CEs, but you can get about 8Kb easily. And that's what will be passed to readdir callback as the name length. 8Kb __copy_to_user() from a buffer allocated by __get_free_page() Cc: stable@vger.kernel.org # 0.98pl6+ (yes, really) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-07Merge tag 'char-misc-4.6-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull misc driver fixes from Gfreg KH: "Here are three small fixes for some driver problems that were reported. Full details in the shortlog below. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: nvmem: mxs-ocotp: fix buffer overflow in read Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read() misc: mic: Fix for double fetch security bug in VOP driver
2016-05-07Merge tag 'staging-4.6-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull IIO driver fixes from Grek KH: "It's really just IIO drivers here, some small fixes that resolve some 'crash on boot' errors that have shown up in the -rc series, and other bugfixes that are required. All have been in linux-next with no reported problems" * tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: iio: imu: mpu6050: Fix name/chip_id when using ACPI iio: imu: mpu6050: fix possible NULL dereferences iio:adc:at91-sama5d2: Repair crash on module removal iio: ak8975: fix maybe-uninitialized warning iio: ak8975: Fix NULL pointer exception on early interrupt
2016-05-07Merge tag 'usb-4.6-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are some last-remaining fixes for USB drivers to resolve issues that have shown up in testing. And two new device ids as well. All of these have been in linux-next with no reported issues" * tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: Revert "USB / PM: Allow USB devices to remain runtime-suspended when sleeping" usb: musb: jz4740: fix error check of usb_get_phy() Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half" usb: musb: gadget: nuke endpoint before setting its descriptor to NULL USB: serial: cp210x: add Straizona Focusers device ids USB: serial: cp210x: add ID for Link ECU
2016-05-07Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds
Pull ARM fixes from Russell King: "These are a number of updates to fix a few problems found in the ARM nommu code over the last couple of years, caused mostly by changes on the mmu side" * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8573/1: domain: move {set,get}_domain under config guard ARM: 8572/1: nommu: change memory reserve for the vectors ARM: 8571/1: nommu: fix PMSAv7 setup
2016-05-07Merge tag 'media/v4.6-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fixes from Mauro Carvalho Chehab: - deadlock fixes on driver probe at exynos4-is and s43-camif drivers - a build breakage if media controller is enabled and USB or PCI is built as module. * tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: [media] media-device: fix builds when USB or PCI is compiled as module [media] media: s3c-camif: fix deadlock on driver probe() [media] media: exynos4-is: fix deadlock on driver probe
2016-05-07Merge branch 'for-4.6-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata Pull libata fixes from Tejun Heo: "An ahci driver addition and updates to ahci port enable handling for some platform devices" * 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: ata: add AMD Seattle platform driver ARM: dts: apq8064: add ahci ports-implemented mask ata: ahci-platform: Add ports-implemented DT bindings. libahci: save port map for forced port map
2016-05-07Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma fix from Doug Ledford: "Fix for max sector calculation in iSER" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: IB/iser: Fix max_sectors calculation
2016-05-06Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull writeback fix from Jens Axboe: "Just a single fix for domain aware writeback, fixing a regression that can cause balance_dirty_pages() to keep looping while not getting any work done" * 'for-linus' of git://git.kernel.dk/linux-block: writeback: Fix performance regression in wb_over_bg_thresh()
2016-05-06Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "This contains two fixes: a boot fix for older SGI/UV systems, and an APIC calibration fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init
2016-05-06Merge tag 'pm+acpi-4.6-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI fixes from Rafael Wysocki: "Fixes for problems introduced or discovered recently (intel_pstate, sti-cpufreq, ARM64 cpuidle, Operating Performance Points framework, generic device properties framework) and one fix for a hotplug-related deadlock in ACPICA that's been there forever, but is nasty enough. Specifics: - Fix for a recent regression in the intel_pstate driver causing it to fail to restore the HWP (HW-managed P-states) configuration of the boot CPU after suspend-to-RAM (Rafael Wysocki). - Fix for two recent regressions in the intel_pstate driver, one that can trigger a divide by zero if the driver is accessed via sysfs before it manages to take the first sample and one causing it to fail to update a structure field used in a trace point, so the information coming from it is less useful (Rafael Wysocki). - Fix for a problem in the sti-cpufreq driver introduced during the 4.5 cycle that causes it to break CPU PM in multi-platform kernels by registering cpufreq-dt (which subsequently doesn't work) unconditionally and preventing the driver that would actually work from registering (Sudeep Holla). - Stable-candidate fix for an ARM64 cpuidle issue causing idle state usage counters to be incorrectly updated for idle states that were not entered due to errors (James Morse). - Fix for a recently introduced issue in the OPP (Operating Performance Points) framework causing it to print bogus error messages for missing optional regulators (Viresh Kumar). - Fix for a recently introduced issue in the generic device properties framework that may cause it to attempt to dereferece and invalid pointer in some cases (Heikki Krogerus). - Fix for a deadlock in the ACPICA core that may be triggered by device (eg Thunderbolt) hotplug (Prarit Bhargava)" * tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM / OPP: Remove useless check ACPICA: Dispatcher: Update thread ID for recursive method calls intel_pstate: Fix intel_pstate_get() cpufreq: intel_pstate: Fix HWP on boot CPU after system resume cpufreq: st: enable selective initialization based on the platform ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value device property: Avoid potential dereferences of invalid pointers
2016-05-06Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fix from Ingo Molnar: "This contains a single fix that fixes a nohz tick stopping bug when mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()
2016-05-06Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "This tree contains two fixes: new Intel CPU model numbers and an AMD/iommu uncore PMU driver fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs perf/x86: Add model numbers for Kabylake CPUs
2016-05-06Merge branch 'efi-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI fixes from Ingo Molnar: "This tree contains three fixes: a console spam fix, a file pattern fix and a sysfb_efi fix for a bug that triggered on older ThinkPads" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sysfb_efi: Fix valid BAR address range check x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT MAINTAINERS: Remove asterisk from EFI directory names
2016-05-06Merge branch 'parisc-4.6-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fix from Helge Deller: "Patch from Dmitry V Levin to fix a kernel crash when a straced process calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls" * 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
2016-05-06Merge tag 'arc-4.6-rc7-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: "Late in the cycle, but this has fixes for couple of issues: a PAE40 boot crash and Arnd spotting lack of barriers in BE io-accessors. The 3rd patch for enabling highmem in low physical mem ;-) honestly is more than a "fix" but its been in works for some time, seems to be stable in testing and enables 2 of our customers to go forward with 4.6 kernel. - Fix for PTE truncation in PAE40 builds - Fix for big endian IO accessors lacking IO barrier - Allow HIGHMEM to work with low physical addresses" * tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: support HIGHMEM even without PAE40 ARC: Fix PAE40 boot failures due to PTE truncation ARC: Add missing io barriers to io{read,write}{16,32}be()
2016-05-06Merge tag 'powerpc-4.6-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fix from Michael Ellerman: "Fix bad inline asm constraint in create_zero_mask() from Anton Blanchard" * tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Fix bad inline asm constraint in create_zero_mask()
2016-05-06Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm fixes from Dave Airlie: "Fixes for i915, amdgpu/radeon and imx. The IMX fix is for an autoloading regression found in Fedora. The radeon fixes, are the same fix to amdgpu/radeon to avoid a hardware lockup in some circumstances with a bad mode, and a double free bug I took a few hours chasing down the other morning. The i915 fixes are across the board, all stable material, and fixing some hangs and suspend/resume issues, along with a live status regressions" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading drm/amdgpu: make sure vertical front porch is at least 1 drm/radeon: make sure vertical front porch is at least 1 drm/amdgpu: set metadata pointer to NULL after freeing. drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW drm/i915: Fake HDMI live status drm/i915: Fix eDP low vswing for Broadwell drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume drm/i915: Fix system resume if PCI device remained enabled drm/i915: Avoid stalling on pending flips for legacy cursor updates
2016-05-06parisc: fix a bug when syscall number of tracee is __NR_Linux_syscallsDmitry V. Levin
Do not load one entry beyond the end of the syscall table when the syscall number of a traced process equals to __NR_Linux_syscalls. Similar bug with regular processes was fixed by commit 3bb457af4fa8 ("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls"). This bug was found by strace test suite. Cc: stable@vger.kernel.org Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Helge Deller <deller@gmx.de>