- 17 May, 2017 40 commits
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Martin Schwidefsky authored
[ Upstream commit fb94a687 ] Return a sensible value if TASK_SIZE if called from a kernel thread. This gets us around an issue with copy_mount_options that does a magic size calculation "TASK_SIZE - (unsigned long)data" while in a kernel thread and data pointing to kernel space. Cc: <stable@vger.kernel.org> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
Sasha Levin <alexander.levin@verizon.com>
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Weston Andros Adamson authored
[ Upstream commit ed92d8c1 ] We're not taking into account that the space needed for the (variable length) attr bitmap, with the result that we'd sometimes get a spurious ERANGE when the ACL data got close to the end of a page. Just add in an extra page to make sure. Signed-off-by:
Weston Andros Adamson <dros@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by:
J. Bruce Fields <bfields@redhat.com> Signed-off-by:
Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by:
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J. Bruce Fields authored
[ Upstream commit 6682c14b ] Bitmap and attrlen follow immediately after the op reply header. This was an oversight from commit bf118a34. Consequences of this are just minor efficiency (extra calls to xdr_shrink_bufhead). Fixes: bf118a34 "NFSv4: include bitmap in nfsv4 get acl data" Reviewed-by:
Kinglong Mee <kinglongmee@gmail.com> Cc: stable@vger.kernel.org Signed-off-by:
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Raghava Aditya Renukunta authored
[ Upstream commit c421530b ] The driver currently checks the SELF_TEST_FAILED first and then KERNEL_PANIC next. Under error conditions(boot code failure) both SELF_TEST_FAILED and KERNEL_PANIC can be set at the same time. The driver has the capability to reset the controller on an KERNEL_PANIC, but not on SELF_TEST_FAILED. Fixed by first checking KERNEL_PANIC and then the others. Cc: stable@vger.kernel.org Fixes: e8b12f0f ([SCSI] aacraid: Add new code for PMC-Sierra's SRC base controller family) Signed-off-by:
Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> Reviewed-by:
David Carroll <David.Carroll@microsemi.com> Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Steve Wise authored
[ Upstream commit f2625f7d ] cma_accept_iw() needs to return an error if conn_params is NULL. Since this is coming from user space, we can crash. Reported-by:
Shaobo He <shaobo@cs.utah.edu> Acked-by:
Sean Hefty <sean.hefty@intel.com> Signed-off-by:
Steve Wise <swise@opengridcomputing.com> Cc: stable@vger.kernel.org Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Bart Van Assche authored
[ Upstream commit 6cb72bc1 ] After srp_process_rsp() returns there is a short time during which the scsi_host_find_tag() call will return a pointer to the SCSI command that is being completed. If during that time a duplicate response is received, avoid that the following call stack appears: BUG: unable to handle kernel NULL pointer dereference at (null) IP: srp_recv_done+0x450/0x6b0 [ib_srp] Oops: 0000 [#1] SMP CPU: 10 PID: 0 Comm: swapper/10 Not tainted 4.10.0-rc7-dbg+ #1 Call Trace: <IRQ> __ib_process_cq+0x4b/0xd0 [ib_core] ib_poll_handler+0x1d/0x70 [ib_core] irq_poll_softirq+0xba/0x120 __do_softirq+0xba/0x4c0 irq_exit+0xbe/0xd0 smp_apic_timer_interrupt+0x38/0x50 apic_timer_interrupt+0x90/0xa0 </IRQ> RIP: srp_recv_done+0x450/0x6b0 [ib_srp] RSP: ffff88046f483e20 Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Cc: Steve Feeley <Steve.Feeley@sandisk.com> Cc: <stable@vger.kernel.org> Reviewed-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Mirko Parthey authored
[ Upstream commit bdfdaf1a ] The Asus WL-500W buttons are active high, but the software treats them as active low. Fix the inverted logic. Fixes: 3be97255 ("MIPS: BCM47XX: Import buttons database from OpenWrt") Signed-off-by:
Mirko Parthey <mirko.parthey@web.de> Acked-by:
Rafał Miłecki <rafal@milecki.pl> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.14.x- Patchwork: https://patchwork.linux-mips.org/patch/15295/Signed-off-by:
James Hogan <james.hogan@imgtec.com> Signed-off-by:
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James Cowgill authored
[ Upstream commit 884b4269 ] If copy_from_user is called with a large buffer (>= 128 bytes) and the userspace buffer refers partially to unreadable memory, then it is possible for Octeon's copy_from_user to report the wrong number of bytes have been copied. In the case where the buffer size is an exact multiple of 128 and the fault occurs in the last 64 bytes, copy_from_user will report that all the bytes were copied successfully but leave some garbage in the destination buffer. The bug is in the main __copy_user_common loop in octeon-memcpy.S where in the middle of the loop, src and dst are incremented by 128 bytes. The l_exc_copy fault handler is used after this but that assumes that "src < THREAD_BUADDR($28)". This is not the case if src has already been incremented. Fix by adding an extra fault handler which rewinds the src and dst pointers 128 bytes before falling though to l_exc_copy. Thanks to the pwritev test from the strace test suite for originally highlighting this bug! Fixes: 5b3b1688 ("MIPS: Add Cavium OCTEON processor support ...") Signed-off-by:
James Cowgill <James.Cowgill@imgtec.com> Acked-by:
David Daney <david.daney@cavium.com> Reviewed-by:
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Ralf Baechle authored
[ Upstream commit 66fd848c ] For certain arguments such as saddr = 0xc0a8fd60, daddr = 0xc0a8fda1, len = 80, proto = 17, sum = 0x7eae049d there will be a carry when folding the intermediate 64 bit checksum to 32 bit but the code doesn't add the carry back to the one's complement sum, thus an incorrect result will be generated. Reported-by:
Mark Zhang <bomb.zhang@gmail.com> Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Reviewed-by:
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Joe Thornber authored
[ Upstream commit ca763d0a ] A rounding bug due to compiler generated temporary being 32bit was found in remap_to_cache(). A localized cast in remap_to_cache() fixes the corruption but this preferred fix (changing from uint32_t to sector_t) eliminates potential for future rounding errors elsewhere. Cc: stable@vger.kernel.org Signed-off-by:
Joe Thornber <ejt@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Dmitry Tunin authored
[ Upstream commit 441ad62d ] T: Bus=01 Lev=01 Prnt=01 Port=07 Cnt=04 Dev#= 5 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=04ca ProdID=3018 Rev=00.01 C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb Signed-off-by:
Dmitry Tunin <hanipouspilot@gmail.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org Signed-off-by:
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Leonard Crestez authored
[ Upstream commit e42a46b6 ] It is allowed to call regulator_get with a NULL dev argument (_regulator_get explicitly checks for it) but this causes an error later when printing /sys/kernel/debug/regulator_summary. Fix this by explicitly handling "deviceless" consumers in the debugfs code. Signed-off-by:
Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by:
Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org Signed-off-by:
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Jaroslav Kysela authored
[ Upstream commit e7480b34 ] Like for Sunrise Point, the total stream number of Lewisburg's input and output stream exceeds 15 (GCAP is 0x9701), which will cause some streams do not work because of the overflow on SDxCTL.STRM field if using the legacy stream tag allocation method. Fixes: 5cf92c8b ("ALSA: hda - Add Intel Lewisburg device IDs Audio") Signed-off-by:
Jaroslav Kysela <perex@perex.cz> Cc: <stable@vger.kernel.org> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Thomas Gleixner authored
[ Upstream commit 6cf18e69 ] This interrupt handler is broken in several ways: - It loops forever when the op code is not decodeable - It never returns IRQ_HANDLED because the only way to exit the loop returns IRQ_NONE unconditionally. The whole concept of this is broken. Creating devices in an interrupt handler is beyond any point of sanity. Make it at least behave halfways sane so accidental users do not have to deal with a hard to debug lockup. Fixes: e809c22b ("goldfish: add the goldfish virtual bus") Reported-by:
Gabriel C <nix.or.die@gmail.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@vger.kernel.org Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Thomas Gleixner authored
[ Upstream commit 47512cfd ] The goldfish platform code registers the platform device unconditionally which causes havoc in several ways if the goldfish_pdev_bus driver is enabled: - Access to the hardcoded physical memory region, which is either not available or contains stuff which is completely unrelated. - Prevents that the interrupt of the serial port can be requested - In case of a spurious interrupt it goes into a infinite loop in the interrupt handler of the pdev_bus driver (which needs to be fixed seperately). Add a 'goldfish' command line option to make the registration opt-in when the platform is compiled in. I'm seriously grumpy about this engineering trainwreck, which has seven SOBs from Intel developers for 50 lines of code. And none of them figured out that this is broken. Impressive fail! Fixes: ddd70cf9 ("goldfish: platform device for x86") Reported-by:
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Christian Lamparter authored
[ Upstream commit c9f1e326 ] This patch fixes the OTP register definitions for the AR934x and AR9550 WMAC SoC. Previously, the ath9k driver was unable to initialize the integrated WMAC on an Aerohive AP121: | ath: phy0: timeout (1000 us) on reg 0x30018: 0xbadc0ffe & 0x00000007 != 0x00000004 | ath: phy0: timeout (1000 us) on reg 0x30018: 0xbadc0ffe & 0x00000007 != 0x00000004 | ath: phy0: Unable to initialize hardware; initialization status: -5 | ath9k ar934x_wmac: failed to initialize device | ath9k: probe of ar934x_wmac failed with error -5 It turns out that the AR9300_OTP_STATUS and AR9300_OTP_DATA definitions contain a typo. Cc: Gabor Juhos <juhosg@openwrt.org> Cc: stable@vger.kernel.org Fixes: add295a4 "ath9k: use correct OTP register offsets for AR9550" Signed-off-by:
Christian Lamparter <chunkeey@googlemail.com> Signed-off-by:
Chris Blake <chrisrblake93@gmail.com> Signed-off-by:
Kalle Valo <kvalo@qca.qualcomm.com> Signed-off-by:
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Ravi Bangoria authored
[ Upstream commit c21a493a ] Currently xmon data-breakpoint feature is broken. Whenever there is a watchpoint match occurs, hw_breakpoint_handler will be called by do_break via notifier chains mechanism. If watchpoint is registered by xmon, hw_breakpoint_handler won't find any associated perf_event and returns immediately with NOTIFY_STOP. Similarly, do_break also returns without notifying to xmon. Solve this by returning NOTIFY_DONE when hw_breakpoint_handler does not find any perf_event associated with matched watchpoint, rather than NOTIFY_STOP, which tells the core code to continue calling the other breakpoint handlers including the xmon one. Cc: stable@vger.kernel.org Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Trond Myklebust authored
[ Upstream commit 251af29c ] It is not sufficient to just check that the lock pids match when granting a callback, we also need to ensure that we're granting the callback on the right file. Reported-by:
Pankaj Singh <psingh.ait@gmail.com> Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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K. Y. Srinivasan authored
[ Upstream commit 372b1e91 ] The hypercall page only needs to be executable but currently it is setup to be writable as well. Fix the issue. Signed-off-by:
K. Y. Srinivasan <kys@microsoft.com> Cc: <stable@vger.kernel.org> Acked-by:
Kees Cook <keescook@chromium.org> Reported-by:
Stephen Hemminger <stephen@networkplumber.org> Tested-by:
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Johan Hovold authored
[ Upstream commit 5182c2cf ] Fix another NULL-pointer dereference at open should a malicious device lack an interrupt-in endpoint. Note that the driver has a broken check for an interrupt-in endpoint which means that an interrupt URB has never even been submitted. Fixes: 3f542974 ("USB: Moschip 7840 USB-Serial Driver") Cc: stable <stable@vger.kernel.org> # v2.6.19: 5c75633eReviewed-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Trond Myklebust authored
[ Upstream commit a974deee ] If we exit because the file access check failed, we currently leak the struct nfs4_state. We need to attach it to the open context before returning. Fixes: 3efb9722 ("NFSv4: Refactor _nfs4_open_and_get_state..") Cc: stable@vger.kernel.org # 3.10+ Signed-off-by:
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Dan Carpenter authored
[ Upstream commit f9ad86e4 ] Having "ret" be a bool type works for everything except ret = funcs->atomic_check(). The other functions all return zero on error but ->atomic_check() returns negative error codes. We want to propagate the error code but instead we return 1. I found this bug with static analysis and I don't know if it affects run time. Fixes: 4cd4df80 ("drm/atomic: Add ->atomic_check() to encoder helpers") Cc: stable@vger.kernel.org Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170207234601.GA23981@mwandaSigned-off-by:
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Steven Rostedt (VMware) authored
[ Upstream commit 32677207 ] The child_exit errno needs to be shifted by 8 bits to compare against the return values for the bisect variables. Fixes: c5dacb88 ("ktest: Allow overriding bisect test results") Cc: stable@vger.kernel.org Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Felix Fietkau authored
[ Upstream commit 3a5e969b ] The code currently relies on refcounting to disable IRQs from within the IRQ handler and re-enabling them again after the tasklet has run. However, due to race conditions sometimes the IRQ handler might be called twice, or the tasklet may not run at all (if interrupted in the middle of a reset). This can cause nasty imbalances in the irq-disable refcount which will get the driver permanently stuck until the entire radio has been stopped and started again (ath_reset will not recover from this). Instead of using this fragile logic, change the code to ensure that running the irq handler during tasklet processing is safe, and leave the refcount untouched. Cc: stable@vger.kernel.org Signed-off-by:
Felix Fietkau <nbd@nbd.name> Signed-off-by:
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Larry Finger authored
[ Upstream commit 6773386f ] Kernels built with CONFIG_KASAN=y report the following BUG for rtl8192cu and rtl8192c-common: ================================================================== BUG: KASAN: slab-out-of-bounds in rtl92c_dm_bt_coexist+0x858/0x1e40 [rtl8192c_common] at addr ffff8801c90edb08 Read of size 1 by task kworker/0:1/38 page:ffffea0007243800 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 flags: 0x8000000000004000(head) page dumped because: kasan: bad access detected CPU: 0 PID: 38 Comm: kworker/0:1 Not tainted 4.9.7-gentoo #3 Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H, BIOS F11a 11/13/2013 Workqueue: rtl92c_usb rtl_watchdog_wq_callback [rtlwifi] 0000000000000000 ffffffff829eea33 ffff8801d7f0fa30 ffff8801c90edb08 ffffffff824c0f09 ffff8801d4abee80 0000000000000004 0000000000000297 ffffffffc070b57c ffff8801c7aa7c48 ffff880100000004 ffffffff000003e8 Call Trace: [<ffffffff829eea33>] ? dump_stack+0x5c/0x79 [<ffffffff824c0f09>] ? kasan_report_error+0x4b9/0x4e0 [<ffffffffc070b57c>] ? _usb_read_sync+0x15c/0x280 [rtl_usb] [<ffffffff824c0f75>] ? __asan_report_load1_noabort+0x45/0x50 [<ffffffffc06d7a88>] ? rtl92c_dm_bt_coexist+0x858/0x1e40 [rtl8192c_common] [<ffffffffc06d7a88>] ? rtl92c_dm_bt_coexist+0x858/0x1e40 [rtl8192c_common] [<ffffffffc06d0cbe>] ? rtl92c_dm_rf_saving+0x96e/0x1330 [rtl8192c_common] ... The problem is due to rtl8192ce and rtl8192cu sharing routines, and having different layouts of struct rtl_pci_priv, which is used by rtl8192ce, and struct rtl_usb_priv, which is used by rtl8192cu. The problem was resolved by placing the struct bt_coexist_info at the head of each of those private areas. Reported-and-tested-by:
Dmitry Osipenko <digetx@gmail.com> Signed-off-by:
Larry Finger <Larry.Finger@lwfinger.net> Cc: Stable <stable@vger.kernel.org> # 4.0+ Cc: Dmitry Osipenko <digetx@gmail.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit a6bb1e17 ] FTDI devices use a receive latency timer to periodically empty the receive buffer and report modem and line status (also when the buffer is empty). When a break or error condition is detected the corresponding status flags will be set on a packet with nonzero data payload and the flags are not updated until the break is over or further characters are received. In order to avoid over-reporting break and error conditions, these flags must therefore only be processed for packets with payload. This specifically fixes the case where after an overrun, the error condition is continuously reported and NULL-characters inserted until further data is received. Reported-by:
Michael Walle <michael@walle.cc> Fixes: 72fda3ca ("USB: serial: ftd_sio: implement sysrq handling on break") Fixes: 166ceb69 ("USB: ftdi_sio: clean up line-status handling") Cc: stable <stable@vger.kernel.org> # v2.6.35 Signed-off-by:
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Janosch Frank authored
[ Upstream commit e1e8a962 ] User controlled KVM guests do not support the dirty log, as they have no single gmap that we can check for changes. As they have no single gmap, kvm->arch.gmap is NULL and all further referencing to it for dirty checking will result in a NULL dereference. Let's return -EINVAL if a caller tries to sync dirty logs for a UCONTROL guest. Fixes: 15f36ebd ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Cc: <stable@vger.kernel.org> # 3.16+ Signed-off-by:
Janosch Frank <frankja@linux.vnet.ibm.com> Reported-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
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Ken Lin authored
[ Upstream commit 9a593656 ] Add new USB IDs for cp2104/5 devices on Bx50v3 boards due to the design change. Signed-off-by:
Ken Lin <yungching0725@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Ian Abbott authored
[ Upstream commit 1c9c858e ] The MKS Instruments SCOM-0800 and SCOM-0801 cards (originally by Tenta Technologies) are 3U CompactPCI serial cards with 4 and 8 serial ports, respectively. The first 4 ports are implemented by an OX16PCI954 chip, and the second 4 ports are implemented by an OX16C954 chip on a local bus, bridged by the second PCI function of the OX16PCI954. The ports are jumper-selectable as RS-232 and RS-422/485, and the UARTs use a non-standard oscillator frequency of 20 MHz (base_baud = 1250000). Signed-off-by:
Ian Abbott <abbotti@mev.co.uk> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Theodore Ts'o authored
[ Upstream commit e112666b ] If the journal has been aborted, we shouldn't mark the underlying buffer head as dirty, since that will cause the metadata block to get modified. And if the journal has been aborted, we shouldn't allow this since it will almost certainly lead to a corrupted file system. Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org Signed-off-by:
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Julian Wiedmann authored
[ Upstream commit 1e4a382f ] For devices with multiple input queues, tiqdio_call_inq_handlers() iterates over all input queues and clears the device's DSCI during each iteration. If the DSCI is re-armed during one of the later iterations, we therefore do not scan the previous queues again. The re-arming also raises a new adapter interrupt. But its handler does not trigger a rescan for the device, as the DSCI has already been erroneously cleared. This can result in queue stalls on devices with multiple input queues. Fix it by clearing the DSCI just once, prior to scanning the queues. As the code is moved in front of the loop, we also need to access the DSCI directly (ie irq->dsci) instead of going via each queue's parent pointer to the same irq. This is not a functional change, and a follow-up patch will clean up the other users. In practice, this bug only affects CQ-enabled HiperSockets devices, ie. devices with sysfs-attribute "hsuid" set. Setting a hsuid is needed for AF_IUCV socket applications that use HiperSockets communication. Fixes: 104ea556 ("qdio: support asynchronous delivery of storage blocks") Cc: <stable@vger.kernel.org> # v3.2+ Reviewed-by:
Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by:
Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by:
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Gerald Schaefer authored
[ Upstream commit a63f53e3 ] Since commit dd22f551 "block: Change direct_access calling convention", the device size calculation in dcssblk_direct_access() is off-by-one. This results in bdev_direct_access() always returning -ENXIO because the returned value is not page aligned. Fix this by adding 1 to the dev_sz calculation. Fixes: dd22f551 ("block: Change direct_access calling convention") Cc: <stable@vger.kernel.org> # 4.0+ Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Eric W. Biederman authored
[ Upstream commit 1064f874 ] Ever since mount propagation was introduced in cases where a mount in propagated to parent mount mountpoint pair that is already in use the code has placed the new mount behind the old mount in the mount hash table. This implementation detail is problematic as it allows creating arbitrary length mount hash chains. Furthermore it invalidates the constraint maintained elsewhere in the mount code that a parent mount and a mountpoint pair will have exactly one mount upon them. Making it hard to deal with and to talk about this special case in the mount code. Modify mount propagation to notice when there is already a mount at the parent mount and mountpoint where a new mount is propagating to and place that preexisting mount on top of the new mount. Modify unmount propagation to notice when a mount that is being unmounted has another mount on top of it (and no other children), and to replace the unmounted mount with the mount on top of it. Move the MNT_UMUONT test from __lookup_mnt_last into __propagate_umount as that is the only call of __lookup_mnt_last where MNT_UMOUNT may be set on any mount visible in the mount hash table. These modifications allow: - __lookup_mnt_last to be removed. - attach_shadows to be renamed __attach_mnt and its shadow handling to be removed. - commit_tree to be simplified - copy_tree to be simplified The result is an easier to understand tree of mounts that does not allow creation of arbitrary length hash chains in the mount hash table. The result is also a very slight userspace visible difference in semantics. The following two cases now behave identically, where before order mattered: case 1: (explicit user action) B is a slave of A mount something on A/a , it will propagate to B/a and than mount something on B/a case 2: (tucked mount) B is a slave of A mount something on B/a and than mount something on A/a Histroically umount A/a would fail in case 1 and succeed in case 2. Now umount A/a succeeds in both configurations. This very small change in semantics appears if anything to be a bug fix to me and my survey of userspace leads me to believe that no programs will notice or care of this subtle semantic change. v2: Updated to mnt_change_mountpoint to not call dput or mntput and instead to decrement the counts directly. It is guaranteed that there will be other references when mnt_change_mountpoint is called so this is safe. v3: Moved put_mountpoint under mount_lock in attach_recursive_mnt As the locking in fs/namespace.c changed between v2 and v3. v4: Reworked the logic in propagate_mount_busy and __propagate_umount that detects when a mount completely covers another mount. v5: Removed unnecessary tests whose result is alwasy true in find_topper and attach_recursive_mnt. v6: Document the user space visible semantic difference. Cc: stable@vger.kernel.org Fixes: b90fa9ae ("[PATCH] shared mount handling: bind and rbind") Tested-by:
Andrei Vagin <avagin@virtuozzo.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Maxime Ripard authored
[ Upstream commit fb61bb82 ] The RTC is clocked from either an internal, imprecise, oscillator or an external one, which is usually much more accurate. The difference perceived between the time elapsed and the time reported by the RTC is in a 10% scale, which prevents the RTC from being useful at all. Fortunately, the external oscillator is reported to be mandatory in the Allwinner datasheet, so we can just switch to it. Cc: stable@vger.kernel.org Fixes: 9765d2d9 ("rtc: sun6i: Add sun6i RTC driver") Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by:
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Maxime Ripard authored
[ Upstream commit a9422a19 ] Some registers have a read-modify-write access pattern that are not atomic. Add some locking to prevent from concurrent accesses. Cc: stable@vger.kernel.org Acked-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 2d380889 ] Make sure to check for short transfers to avoid underflow in a loop condition when parsing the receive buffer. Also fix an off-by-one error in the incomplete sanity check which could lead to invalid data being parsed. Fixes: 8c209e67 ("USB: make actual_length in struct urb field u32") Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> # v2.6.30 Reviewed-by:
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Randy Dunlap authored
[ Upstream commit e3bb3cdd ] Fix dm1105 build error when CONFIG_I2C_ALGOBIT=m and CONFIG_DVB_DM1105=y. drivers/built-in.o: In function `dm1105_probe': dm1105.c:(.text+0x2836e7): undefined reference to `i2c_bit_add_bus' Signed-off-by:
Randy Dunlap <rdunlap@infradead.org> Reported-by:
kbuild test robot <fengguang.wu@intel.com> Cc: Javier Martinez Canillas <javier@osg.samsung.com> Cc: stable@vger.kernel.org # applies to 4.0 (maybe even 3.x) Signed-off-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by:
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Rafał Miłecki authored
[ Upstream commit a971df0b ] This allows tracking device state and e.g. makes devm work as expected. Signed-off-by:
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Nicolas Iooss authored
[ Upstream commit 6ebf7577 ] In vpfe_s_fmt(), when the sensor format and the requested format were the same, bpp was assigned to vpfe->bpp without being initialized first. Grab the bpp value that is currently used by using __vpfe_get_format() instead of its wrapper, vpfe_try_fmt(). This use of uninitialized variable has been found by compiling the kernel with clang. Fixes: 417d2e50 ("[media] media: platform: add VPFE capture driver support for AM437X") Cc: stable@vger.kernel.org Signed-off-by:
Nicolas Iooss <nicolas.iooss_linux@m4x.org> Signed-off-by:
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Marc Zyngier authored
[ Upstream commit 8f36ebaf ] When we fault in a page, we flush it to the PoC (Point of Coherency) if the faulting vcpu has its own caches off, so that it can observe the page we just brought it. But if the vcpu has its caches on, we skip that step. Bad things happen when *another* vcpu tries to access that page with its own caches disabled. At that point, there is no garantee that the data has made it to the PoC, and we access stale data. The obvious fix is to always flush to PoC when a page is faulted in, no matter what the state of the vcpu is. Cc: stable@vger.kernel.org Fixes: 2d58b733 ("arm64: KVM: force cache clean on page fault when caches are off") Reviewed-by:
Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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