- 19 Mar, 2018 20 commits
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Xinyong authored
commit 1a087f03 upstream. When I debug a kernel crash issue in funcitonfs, found ffs_data.ref overflowed, While functionfs is unmounting, ffs_data is put twice. Commit 43938613 ("drivers, usb: convert ffs_data.ref from atomic_t to refcount_t") can avoid refcount overflow, but that is risk some situations. So no need put ffs data in ffs_fs_kill_sb, already put in ffs_data_closed. The issue can be reproduced in Mediatek mt6763 SoC, ffs for ADB device. KASAN enabled configuration reports use-after-free errro. BUG: KASAN: use-after-free in refcount_dec_and_test+0x14/0xe0 at addr ffffffc0579386a0 Read of size 4 by task umount/4650 ==================================================== BUG kmalloc-512 (Tainted: P W O ): kasan: bad access detected ----------------------------------------------------------------------------- INFO: Allocated in ffs_fs_mount+0x194/0x844 age=22856 cpu=2 pid=566 alloc_debug_processing+0x1ac/0x1e8 ___slab_alloc.constprop.63+0x640/0x648 __slab_alloc.isra.57.constprop.62+0x24/0x34 kmem_cache_alloc_trace+0x1a8/0x2bc ffs_fs_mount+0x194/0x844 mount_fs+0x6c/0x1d0 vfs_kern_mount+0x50/0x1b4 do_mount+0x258/0x1034 INFO: Freed in ffs_data_put+0x25c/0x320 age=0 cpu=3 pid=4650 free_debug_processing+0x22c/0x434 __slab_free+0x2d8/0x3a0 kfree+0x254/0x264 ffs_data_put+0x25c/0x320 ffs_data_closed+0x124/0x15c ffs_fs_kill_sb+0xb8/0x110 deactivate_locked_super+0x6c/0x98 deactivate_super+0xb0/0xbc INFO: Object 0xffffffc057938600 @offset=1536 fp=0x (null) ...... Call trace: [<ffffff900808cf5c>] dump_backtrace+0x0/0x250 [<ffffff900808d3a0>] show_stack+0x14/0x1c [<ffffff90084a8c04>] dump_stack+0xa0/0xc8 [<ffffff900826c2b4>] print_trailer+0x158/0x260 [<ffffff900826d9d8>] object_err+0x3c/0x40 [<ffffff90082745f0>] kasan_report_error+0x2a8/0x754 [<ffffff9008274f84>] kasan_report+0x5c/0x60 [<ffffff9008273208>] __asan_load4+0x70/0x88 [<ffffff90084cd81c>] refcount_dec_and_test+0x14/0xe0 [<ffffff9008d98f9c>] ffs_data_put+0x80/0x320 [<ffffff9008d9d904>] ffs_fs_kill_sb+0xc8/0x110 [<ffffff90082852a0>] deactivate_locked_super+0x6c/0x98 [<ffffff900828537c>] deactivate_super+0xb0/0xbc [<ffffff90082af0c0>] cleanup_mnt+0x64/0xec [<ffffff90082af1b0>] __cleanup_mnt+0x10/0x18 [<ffffff90080d9e68>] task_work_run+0xcc/0x124 [<ffffff900808c8c0>] do_notify_resume+0x60/0x70 [<ffffff90080866e4>] work_pending+0x10/0x14 Cc: stable@vger.kernel.org Signed-off-by:
Xinyong <xinyong.fang@linux.alibaba.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pete Zaitcev authored
commit a5f59683 upstream. This change fixes buffer overflows and silent data corruption with the usbmon device driver text file read operations. Signed-off-by:
Fredrik Noring <noring@nocrew.org> Signed-off-by:
Pete Zaitcev <zaitcev@redhat.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Danilo Krummrich authored
commit cb88a058 upstream. Corsair Strafe RGB keyboard does not respond to usb control messages sometimes and hence generates timeouts. Commit de3af5bf ("usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard") tried to fix those timeouts by adding USB_QUIRK_DELAY_INIT. Unfortunately, even with this quirk timeouts of usb_control_msg() can still be seen, but with a lower frequency (approx. 1 out of 15): [ 29.103520] usb 1-8: string descriptor 0 read error: -110 [ 34.363097] usb 1-8: can't set config #1, error -110 Adding further delays to different locations where usb control messages are issued just moves the timeouts to other locations, e.g.: [ 35.400533] usbhid 1-8:1.0: can't add hid device: -110 [ 35.401014] usbhid: probe of 1-8:1.0 failed with error -110 The only way to reliably avoid those issues is having a pause after each usb control message. In approx. 200 boot cycles no more timeouts were seen. Addionaly, keep USB_QUIRK_DELAY_INIT as it turned out to be necessary to have the delay in hub_port_connect() after hub_port_init(). The overall boot time seems not to be influenced by these additional delays, even on fast machines and lightweight distributions. Fixes: de3af5bf ("usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard") Cc: stable@vger.kernel.org Signed-off-by:
Danilo Krummrich <danilokrummrich@dk-develop.de> Signed-off-by:
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Colin Ian King authored
commit df3334c2 upstream. Currently the driver attempts to spin lock on udc->lock before a NULL pointer check is performed on udc, hence there is a potential null pointer dereference on udc->lock. Fix this by moving the null check on udc before the lock occurs. Fixes: ea6873a4 ("usbip: vudc: Add SysFS infrastructure for VUDC") Signed-off-by:
Colin Ian King <colin.king@canonical.com> Acked-by:
Shuah Khan <shuahkh@osg.samsung.com> Reviewed-by:
Krzysztof Opasiak <k.opasiak@samsung.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Teijo Kinnunen authored
commit 5126a504 upstream. This USB-SATA controller seems to be similar with JMicron bridge 152d:2566 already on the list. Adding it here fixes "Invalid field in cdb" errors. Signed-off-by:
Teijo Kinnunen <teijo.kinnunen@code-q.fi> Cc: stable@vger.kernel.org Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Joel Fernandes authored
commit cb57469c upstream. ashmem_mutex create a chain of dependencies like so: (1) mmap syscall -> mmap_sem -> (acquired) ashmem_mmap ashmem_mutex (try to acquire) (block) (2) llseek syscall -> ashmem_llseek -> ashmem_mutex -> (acquired) inode_lock -> inode->i_rwsem (try to acquire) (block) (3) getdents -> iterate_dir -> inode_lock -> inode->i_rwsem (acquired) copy_to_user -> mmap_sem (try to acquire) There is a lock ordering created between mmap_sem and inode->i_rwsem causing a lockdep splat [2] during a syzcaller test, this patch fixes the issue by unlocking the mutex earlier. Functionally that's Ok since we don't need to protect vfs_llseek. [1] https://patchwork.kernel.org/patch/10185031/ [2] https://lkml.org/lkml/2018/1/10/48Acked-by:
Todd Kjos <tkjos@google.com> Cc: Arve Hjonnevag <arve@android.com> Cc: stable@vger.kernel.org Reported-by: syzbot+8ec30bb7bf1a981a2012@syzkaller.appspotmail.com Signed-off-by:
Joel Fernandes <joelaf@google.com> Acked-by:
Greg Hackmann <ghackmann@google.com> Signed-off-by:
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Frank Mori Hess authored
commit a42ae590 upstream. A rounding error was causing comedi_nsamples_left to return the wrong value when nsamples was not a multiple of the scan length. Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by:
Frank Mori Hess <fmh6jj@gmail.com> Reviewed-by:
Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
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Oliver Neukum authored
commit 9a513c90 upstream. A typo broke the comparison. Fixes: cbeef22f ("usb: uas: unconditionally bring back host after reset") Signed-off-by:
Oliver Neukum <oneukum@suse.com> CC: stable@kernel.org Acked-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Jonas Danielsson authored
commit fd63a890 upstream. On our at91sam9260 based board the usart0 and usart1 ports report their versions (ATMEL_US_VERSION) as 0x10302. This version is not included in the current checks in the driver. Signed-off-by:
Jonas Danielsson <jonas@orbital-systems.com> Acked-by:
Richard Genoud <richard.genoud@gmail.com> Acked-by:
Nicolas Ferre <nicolas.ferre@microchip.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Ulrich Hecht authored
commit 7842055b upstream. When the TTY buffers fill up to the configured maximum, a system lockup occurs: [ 598.820128] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 598.825796] 0-...!: (1 GPs behind) idle=5a6/2/0 softirq=1974/1974 fqs=1 [ 598.832577] (detected by 3, t=62517 jiffies, g=296, c=295, q=126) [ 598.838755] Task dump for CPU 0: [ 598.841977] swapper/0 R running task 0 0 0 0x00000022 [ 598.849023] Call trace: [ 598.851476] __switch_to+0x98/0xb0 [ 598.854870] (null) This can be prevented by doing a dummy read of the RX data register. This issue affects both HSCIF and SCIF ports. Reported for R-Car H3 ES2.0; reproduced and fixed on H3 ES1.1. Probably affects other R-Car platforms as well. Reported-by:
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by:
Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by:
Geert Uytterhoeven <geert+renesas@glider.be> Cc: stable <stable@vger.kernel.org> Tested-by:
Nguyen Viet Dung <dung.nguyen.aj@renesas.com> Signed-off-by:
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Mathias Nyman authored
commit 97ef0faf upstream. Fix incorrent values showed for max Primary stream and Linear stream array (LSA) values in the endpoint context decoder. Fixes: 19a7d0d6 ("usb: host: xhci: add Slot and EP Context tracers") Cc: <stable@vger.kernel.org> # v4.12+ Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
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Kai-Heng Feng authored
commit 191edc5e upstream. When a USB device gets plugged on ASUS PRIME B350M-A's front ports, the xHC stops working: [ 549.114587] xhci_hcd 0000:02:00.0: WARN: xHC CMD_RUN timeout [ 549.114608] suspend_common(): xhci_pci_suspend+0x0/0xc0 returns -110 [ 549.114638] xhci_hcd 0000:02:00.0: can't suspend (hcd_pci_runtime_suspend returned -110) Delay before running xHC command CMD_RUN can workaround the issue. Use a new quirk to make the delay only targets to the affected xHC. Signed-off-by:
Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by:
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Yoshihiro Shimoda authored
commit 015dbeb2 upstream. This patch adds support for r8a77965 (R-Car M3-N). Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Reviewed-by:
Rob Herring <robh@kernel.org> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Hans de Goede authored
commit 2d30e949 upstream. The ALC5651 does not like multi-write accesses, avoid them. This fixes: rt5651 i2c-10EC5651:00: Unable to sync registers 0x27-0x28. -121 Errors on resume (and all registers after the registers in the error not being synced). Signed-off-by:
Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org Signed-off-by:
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Richard Fitzgerald authored
commit d7789f5b upstream. Normal 512-byte get/set of a TLV isn't supported but we were registering the normal get/set anyway and relying on omitting the SNDRV_CTL_ELEM_ACCESS_[READ|WRITE] flags to prevent them being called. Trouble is if this gets broken in the core ALSA code - as it has been since at least 4.14 - the standard get/set can be called unexpectedly and corrupt memory. There's no point providing functions that won't be called and it's a trivial change. The benefit is that if the ALSA core gets broken again we get a big fat immediate NULL dereference instead of a memory corruption timebomb. Signed-off-by:
Richard Fitzgerald <rf@opensource.cirrus.com> Signed-off-by:
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Fabio Estevam authored
commit a8992973 upstream. Commit 8419caa7 ("ASoC: sgtl5000: Do not disable regulators in SND_SOC_BIAS_OFF") causes the sgtl5000 to fail after a suspend/resume sequence: Playing WAVE '/media/a2002011001-e02.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo aplay: pcm_write:2051: write error: Input/output error The problem is caused by the fact that the aforementioned commit dropped the cache handling, so re-introduce the register map resync to fix the problem. Suggested-by:
Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by:
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Yong Deng authored
commit 5a338679 upstream. I2S's RX slot number of SUN8I should be shifted 4 bit to left. Fixes: 7d299381 ("ASoC: sun4i-i2s: Add support for H3") Signed-off-by:
Yong Deng <yong.deng@magewell.com> Reviewed-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
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H.J. Lu authored
commit b21ebf2f upstream. On i386, there are 2 types of PLTs, PIC and non-PIC. PIE and shared objects must use PIC PLT. To use PIC PLT, you need to load _GLOBAL_OFFSET_TABLE_ into EBX first. There is no need for that on x86-64 since x86-64 uses PC-relative PLT. On x86-64, for 32-bit PC-relative branches, we can generate PLT32 relocation, instead of PC32 relocation, which can also be used as a marker for 32-bit PC-relative branches. Linker can always reduce PLT32 relocation to PC32 if function is defined locally. Local functions should use PC32 relocation. As far as Linux kernel is concerned, R_X86_64_PLT32 can be treated the same as R_X86_64_PC32 since Linux kernel doesn't use PLT. R_X86_64_PLT32 for 32-bit PC-relative branches has been enabled in binutils master branch which will become binutils 2.31. [ hjl is working on having better documentation on this all, but a few more notes from him: "PLT32 relocation is used as marker for PC-relative branches. Because of EBX, it looks odd to generate PLT32 relocation on i386 when EBX doesn't have GOT. As for symbol resolution, PLT32 and PC32 relocations are almost interchangeable. But when linker sees PLT32 relocation against a protected symbol, it can resolved locally at link-time since it is used on a branch instruction. Linker can't do that for PC32 relocation" but for the kernel use, the two are basically the same, and this commit gets things building and working with the current binutils master - Linus ] Signed-off-by:
H.J. Lu <hjl.tools@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthias Kaehlcke <mka@chromium.org> Signed-off-by:
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Andrew Lunn authored
commit 9c2c2e62 upstream. commit f5e64032 ("net: phy: fix resume handling") changes the locking semantics for phy_resume() such that the caller now needs to hold the phy mutex. Not all call sites were adopted to this new semantic, resulting in warnings from the added WARN_ON(!mutex_is_locked(&phydev->lock)). Rather than change the semantics, add a __phy_resume() and restore the old behavior of phy_resume(). Reported-by:
Heiner Kallweit <hkallweit1@gmail.com> Fixes: f5e64032 ("net: phy: fix resume handling") Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Russell King authored
[ Upstream commit f5e64032 ] When a PHY has the BMCR_PDOWN bit set, it may decide to ignore writes to other registers, or reset the registers to power-on defaults. Micrel PHYs do this for their interrupt registers. The current structure of phylib tries to enable interrupts before resuming (and releasing) the BMCR_PDOWN bit. This fails, causing Micrel PHYs to stop working after a suspend/resume sequence if they are using interrupts. Fix this by ensuring that the PHY driver resume methods do not take the phydev->lock mutex themselves, but the callers of phy_resume() take that lock. This then allows us to move the call to phy_resume() before we enable interrupts in phy_start(). Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by:
Sasha Levin <alexander.levin@verizon.com> Signed-off-by:
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- 15 Mar, 2018 20 commits
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Greg Kroah-Hartman authored
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Francis Deslauriers authored
commit c07a8f8b upstream. Disable the kprobe probing of the entry trampoline: .entry_trampoline is a code area that is used to ensure page table isolation between userspace and kernelspace. At the beginning of the execution of the trampoline, we load the kernel's CR3 register. This has the effect of enabling the translation of the kernel virtual addresses to physical addresses. Before this happens most kernel addresses can not be translated because the running process' CR3 is still used. If a kprobe is placed on the trampoline code before that change of the CR3 register happens the kernel crashes because int3 handling pages are not accessible. To fix this, add the .entry_trampoline section to the kprobe blacklist to prohibit the probing of code before all the kernel pages are accessible. Signed-off-by:
Francis Deslauriers <francis.deslauriers@efficios.com> Reviewed-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: mathieu.desnoyers@efficios.com Cc: mhiramat@kernel.org Link: http://lkml.kernel.org/r/1520565492-4637-2-git-send-email-francis.deslauriers@efficios.comSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Josh Poimboeuf authored
commit 63474dc4 upstream. Fix the objtool build when cross-compiling a 64-bit kernel on a 32-bit host. This also simplifies read_retpoline_hints() a bit and makes its implementation similar to most of the other annotation reading functions. Reported-by:
Sven Joachim <svenjoac@gmx.de> Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: b5bc2231 ("objtool: Add retpoline validation") Link: http://lkml.kernel.org/r/2ca46c636c23aa9c9d57d53c75de4ee3ddf7a7df.1520380691.git.jpoimboe@redhat.comSigned-off-by:
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Josh Poimboeuf authored
commit 1402fd8e upstream. Continue the switch table detection whack-a-mole. Add a check to distinguish KASAN data reads from switch data reads. The switch jump tables in .rodata have relocations associated with them. This fixes the following warning: crypto/asymmetric_keys/x509_cert_parser.o: warning: objtool: x509_note_pkey_algo()+0xa4: sibling call from callable instruction with modified stack frame Reported-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Peter Zijlstra authored
commit d5028ba8 upstream. Disable retpoline validation in objtool if your compiler sucks, and otherwise select the validation stuff for CONFIG_RETPOLINE=y (most builds would already have it set due to ORC). Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
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Peter Zijlstra authored
commit ca41b97e upstream. David allowed retpolines in .init.text, except for modules, which will trip up objtool retpoline validation, fix that. Requested-by:
David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Masahiro Yamada authored
commit cfe17c9b upstream. Geert reported commit ae6b289a ("kbuild: Set KBUILD_CFLAGS before incl. arch Makefile") broke cross-compilation using a cross-compiler that supports less compiler options than the host compiler. For example, cc1: error: unrecognized command line option "-Wno-unused-but-set-variable" This problem happens on architectures that setup CROSS_COMPILE in their arch/*/Makefile. Move the cc-option and cc-disable-warning back to the original position, but keep the Clang target options untouched. Fixes: ae6b289a ("kbuild: Set KBUILD_CFLAGS before incl. arch Makefile") Reported-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by:
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Chris Fries authored
commit ae6b289a upstream. Set the clang KBUILD_CFLAGS up before including arch/ Makefiles, so that ld-options (etc.) can work correctly. This fixes errors with clang such as ld-options trying to CC against your host architecture, but LD trying to link against your target architecture. Signed-off-by:
Chris Fries <cfries@google.com> Signed-off-by:
Nick Desaulniers <ndesaulniers@google.com> Reviewed-by:
Matthias Kaehlcke <mka@chromium.org> Tested-by:
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Masahiro Yamada authored
commit 2c1f4f12 upstream. The top Makefile is divided into some sections such as mixed targets, config targets, build targets, etc. When we build mixed targets, Kbuild just invokes submake to process them one by one. In this case, compiler-related variables like CC, KBUILD_CFLAGS, etc. are unneeded. Check what kind of targets we are building first, and parse variables for building only when necessary. Signed-off-by:
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Peter Zijlstra authored
commit b5bc2231 upstream. David requested a objtool validation pass for CONFIG_RETPOLINE=y enabled builds, where it validates no unannotated indirect jumps or calls are left. Add an additional .discard.retpoline_safe section to allow annotating the few indirect sites that are required and safe. Requested-by:
David Woodhouse <dwmw@amazon.co.uk> Acked-by:
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Peter Zijlstra authored
commit 43a4525f upstream. Use the existing global variables instead of passing them around and creating duplicate global variables. Signed-off-by:
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Peter Zijlstra authored
commit 531bb52a upstream. This is boot code and thus Spectre-safe: we run this _way_ before userspace comes along to have a chance to poison our branch predictor. Signed-off-by:
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Peter Zijlstra authored
commit bd89004f upstream. The objtool retpoline validation found this indirect jump. Seeing how it's on CPU bringup before we run userspace it should be safe, annotate it. Signed-off-by:
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Peter Zijlstra authored
commit 3010a066 upstream. Paravirt emits indirect calls which get flagged by objtool retpoline checks, annotate it away because all these indirect calls will be patched out before we start userspace. This patching happens through alternative_instructions() -> apply_paravirt() -> pv_init_ops.patch() which will eventually end up in paravirt_patch_default(). This function _will_ write direct alternatives. Signed-off-by:
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Ingo Molnar authored
commit d72f4e29 upstream. firmware_restrict_branch_speculation_*() recently started using preempt_enable()/disable(), but those are relatively high level primitives and cause build failures on some 32-bit builds. Since we want to keep <asm/nospec-branch.h> low level, convert them to macros to avoid header hell... Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: arjan.van.de.ven@intel.com Cc: bp@alien8.de Cc: dave.hansen@intel.com Cc: jmattson@google.com Cc: karahmed@amazon.de Cc: kvm@vger.kernel.org Cc: pbonzini@redhat.com Cc: rkrcmar@redhat.com Cc: linux-kernel@vger.kernel.org Signed-off-by:
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Peter Zijlstra authored
commit 9e0e3c51 upstream. Annotate the indirect calls/jumps in the CALL_NOSPEC/JUMP_NOSPEC alternatives. Signed-off-by:
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David Woodhouse authored
commit 87358710 upstream. Signed-off-by:
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David Woodhouse authored
commit dd84441a upstream. Retpoline means the kernel is safe because it has no indirect branches. But firmware isn't, so use IBRS for firmware calls if it's available. Block preemption while IBRS is set, although in practice the call sites already had to be doing that. Ignore hpwdt.c for now. It's taking spinlocks and calling into firmware code, from an NMI handler. I don't want to touch that with a bargepole. Signed-off-by:
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David Woodhouse authored
commit d1c99108 upstream. This reverts commit 1dde7415. By putting the RSB filling out of line and calling it, we waste one RSB slot for returning from the function itself, which means one fewer actual function call we can make if we're doing the Skylake abomination of call-depth counting. It also changed the number of RSB stuffings we do on vmexit from 32, which was correct, to 16. Let's just stop with the bikeshedding; it didn't actually *fix* anything anyway. Signed-off-by:
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Jan Beulich authored
commit 8554004a upstream. Omitting suffixes from instructions in AT&T mode is bad practice when operand size cannot be determined by the assembler from register operands, and is likely going to be warned about by upstream GAS in the future (mine does already). Add the single missing suffix here. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Acked-by:
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