1. 16 Dec, 2021 1 commit
    • Eric W. Biederman's avatar
      s390/exit: remove dead reference to do_exit from copy_thread · 893d4d9c
      Eric W. Biederman authored
      My s390 assembly is not particularly good so I have read the history
      of the reference to do_exit copy_thread and have been able to
      verify that do_exit is not used.
      
      The general argument is that s390 has been changed to use the generic
      kernel_thread and kernel_execve and the generic versions do not call
      do_exit.  So it is strange to see a do_exit reference sitting there.
      
      The history of the do_exit reference in s390's version of copy_thread
      seems conclusive that the do_exit reference is something that lingers
      and should have been removed several years ago.
      
      Up through 8d19f15a ("[PATCH] s390 update (1/27): arch.")  the
      s390 code made a call to the exit(2) system call when a kernel thread
      finished.  Then kernel_thread_starter was added which branched
      directly to the value in register 11 when the kernel thread finshed.
      The value in register 11 was set in kernel_thread to
      "regs.gprs[11] = (unsigned long) do_exit"
      
      In commit 37fe5d41 ("s390: fold kernel_thread_helper() into
      ret_from_fork()") kernel_thread_starter was moved into entry.S and
      entry64.S unchanged (except for the syntax differences between inline
      assemly and in the assembly file).
      
      In commit f9a7e025 ("s390: switch to generic kernel_thread()") the
      assignment to "gprs[11]" was moved into copy_thread from the old
      kernel_thread.  The helper kernel_thread_starter was still being used
      and was still branching to "%r11" at the end.
      
      In commit 30dcb099 ("s390: switch to saner kernel_execve()
      semantics") kernel_thread_starter was changed to unconditionally
      branch to sysc_tracenogo instead to %r11 which held the value of
      do_exit.  Unfortunately copy_thread was not updated to stop passing
      do_exit in "gprs[11]".
      
      In commit 56e62a73 ("s390: convert to generic entry")
      kernel_thread_starter was replaced by __ret_from_fork.  And the code
      still continued to pass do_exit in "gprs[11]" despite __ret_from_fork
      not caring in the slightest.
      
      Remove this dead reference to do_exit to make it clear that s390 is
      not doing anything with do_exit in copy_thread.
      
      History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
      
      Cc: Vasily Gorbik <gor@linux.ibm.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Alexander Gordeev <agordeev@linux.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Fixes: 30dcb099 ("s390: switch to saner kernel_execve() semantics")
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      Link: https://lore.kernel.org/r/20211208202532.16409-1-ebiederm@xmission.comSigned-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
      893d4d9c
  2. 10 Dec, 2021 6 commits
  3. 06 Dec, 2021 16 commits
  4. 05 Dec, 2021 12 commits
    • Linus Torvalds's avatar
      Linux 5.16-rc4 · 0fcfb00b
      Linus Torvalds authored
      0fcfb00b
    • Linus Torvalds's avatar
      Merge tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 268ba095
      Linus Torvalds authored
      Pull parisc fixes from Helge Deller:
       "Some bug and warning fixes:
      
         - Fix "make install" to use debians "installkernel" script which is
           now in /usr/sbin
      
         - Fix the bindeb-pkg make target by giving the correct KBUILD_IMAGE
           file name
      
         - Fix compiler warnings by annotating parisc agp init functions with
           __init
      
         - Fix timekeeping on SMP machines with dual-core CPUs
      
         - Enable some more config options in the 64-bit defconfig"
      
      * tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Mark cr16 CPU clocksource unstable on all SMP machines
        parisc: Fix "make install" on newer debian releases
        parisc/agp: Annotate parisc agp init functions with __init
        parisc: Enable sata sil, audit and usb support on 64-bit defconfig
        parisc: Fix KBUILD_IMAGE for self-extracting kernel
      268ba095
    • Linus Torvalds's avatar
      Merge tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 94420704
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some small USB fixes for a few reported issues. Included in
        here are:
      
         - xhci fix for a _much_ reported regression. I don't think there's a
           community distro that has not reported this problem yet :(
      
         - new USB quirk addition
      
         - cdns3 minor fixes
      
         - typec regression fix.
      
        All of these have been in linux-next with no reported problems, and
        the xhci fix has been reported by many to resolve their reported
        problem"
      
      * tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()
        usb: cdns3: gadget: fix new urb never complete if ep cancel previous requests
        usb: typec: tcpm: Wait in SNK_DEBOUNCED until disconnect
        USB: NO_LPM quirk Lenovo Powered USB-C Travel Hub
        xhci: Fix commad ring abort, write all 64 bits to CRCR register.
      94420704
    • Linus Torvalds's avatar
      Merge tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 51639539
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some small TTY and Serial driver fixes for 5.16-rc4 to
        resolve a number of reported problems.
      
        They include:
      
         - liteuart serial driver fixes
      
         - 8250_pci serial driver fixes for pericom devices
      
         - 8250 RTS line control fix while in RS-485 mode
      
         - tegra serial driver fix
      
         - msm_serial driver fix
      
         - pl011 serial driver new id
      
         - fsl_lpuart revert of broken change
      
         - 8250_bcm7271 serial driver fix
      
         - MAINTAINERS file update for rpmsg tty driver that came in 5.16-rc1
      
         - vgacon fix for reported problem
      
        All of these, except for the 8250_bcm7271 fix have been in linux-next
        with no reported problem. The 8250_bcm7271 fix was added to the tree
        on Friday so no chance to be linux-next yet. But it should be fine as
        the affected developers submitted it"
      
      * tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        serial: 8250_bcm7271: UART errors after resuming from S2
        serial: 8250_pci: rewrite pericom_do_set_divisor()
        serial: 8250_pci: Fix ACCES entries in pci_serial_quirks array
        serial: 8250: Fix RTS modem control while in rs485 mode
        Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"
        serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30
        serial: liteuart: relax compile-test dependencies
        serial: liteuart: fix minor-number leak on probe errors
        serial: liteuart: fix use-after-free and memleak on unbind
        serial: liteuart: Fix NULL pointer dereference in ->remove()
        vgacon: Propagate console boot parameters before calling `vc_resize'
        tty: serial: msm_serial: Deactivate RX DMA for polling support
        serial: pl011: Add ACPI SBSA UART match id
        serial: core: fix transmit-buffer reset and memleak
        MAINTAINERS: Add rpmsg tty driver maintainer
      51639539
    • Linus Torvalds's avatar
      Merge tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7587a4a5
      Linus Torvalds authored
      Pull timer fix from Borislav Petkov:
      
       - Prevent a tick storm when a dedicated timekeeper CPU in nohz_full
         mode runs for prolonged periods with interrupts disabled and ends up
         programming the next tick in the past, leading to that storm
      
      * tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        timers/nohz: Last resort update jiffies on nohz_full IRQ entry
      7587a4a5
    • Linus Torvalds's avatar
      Merge tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1d213767
      Linus Torvalds authored
      Pull scheduler fixes from Borislav Petkov:
      
       - Properly init uclamp_flags of a runqueue, on first enqueuing
      
       - Fix preempt= callback return values
      
       - Correct utime/stime resource usage reporting on nohz_full to return
         the proper times instead of shorter ones
      
      * tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/uclamp: Fix rq->uclamp_max not set on first enqueue
        preempt/dynamic: Fix setup_preempt_mode() return value
        sched/cputime: Fix getrusage(RUSAGE_THREAD) with nohz_full
      1d213767
    • Linus Torvalds's avatar
      Merge tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f5d54a42
      Linus Torvalds authored
      Pull x86 fixes from Borislav Petkov:
      
       - Fix a couple of SWAPGS fencing issues in the x86 entry code
      
       - Use the proper operand types in __{get,put}_user() to prevent
         truncation in SEV-ES string io
      
       - Make sure the kernel mappings are present in trampoline_pgd in order
         to prevent any potential accesses to unmapped memory after switching
         to it
      
       - Fix a trivial list corruption in objtool's pv_ops validation
      
       - Disable the clocksource watchdog for TSC on platforms which claim
         that the TSC is constant, doesn't stop in sleep states, CPU has TSC
         adjust and the number of sockets of the platform are max 2, to
         prevent erroneous markings of the TSC as unstable.
      
       - Make sure TSC adjust is always checked not only when going idle
      
       - Prevent a stack leak by initializing struct _fpx_sw_bytes properly in
         the FPU code
      
       - Fix INTEL_FAM6_RAPTORLAKE define naming to adhere to the convention
      
      * tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/xen: Add xenpv_restore_regs_and_return_to_usermode()
        x86/entry: Use the correct fence macro after swapgs in kernel CR3
        x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()
        x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
        x86/64/mm: Map all kernel memory into trampoline_pgd
        objtool: Fix pv_ops noinstr validation
        x86/tsc: Disable clocksource watchdog for TSC on qualified platorms
        x86/tsc: Add a timer to make sure TSC_adjust is always checked
        x86/fpu/signal: Initialize sw_bytes in save_xstate_epilog()
        x86/cpu: Drop spurious underscore from RAPTOR_LAKE #define
      f5d54a42
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 90bf8d98
      Linus Torvalds authored
      Pull more kvm fixes from Paolo Bonzini:
      
       - Static analysis fix
      
       - New SEV-ES protocol for communicating invalid VMGEXIT requests
      
       - Ensure APICv is considered inactive if there is no APIC
      
       - Fix reserved bits for AMD PerfEvtSeln register
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure
        KVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary
        KVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails
        KVM: x86/mmu: Retry page fault if root is invalidated by memslot update
        KVM: VMX: Set failure code in prepare_vmcs02()
        KVM: ensure APICv is considered inactive if there is no APIC
        KVM: x86/pmu: Fix reserved bits for AMD PerfEvtSeln register
      90bf8d98
    • Tom Lendacky's avatar
      KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure · ad5b3532
      Tom Lendacky authored
      Currently, an SEV-ES guest is terminated if the validation of the VMGEXIT
      exit code or exit parameters fails.
      
      The VMGEXIT instruction can be issued from userspace, even though
      userspace (likely) can't update the GHCB. To prevent userspace from being
      able to kill the guest, return an error through the GHCB when validation
      fails rather than terminating the guest. For cases where the GHCB can't be
      updated (e.g. the GHCB can't be mapped, etc.), just return back to the
      guest.
      
      The new error codes are documented in the lasest update to the GHCB
      specification.
      
      Fixes: 291bd20d ("KVM: SVM: Add initial support for a VMGEXIT VMEXIT")
      Signed-off-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
      Message-Id: <b57280b5562893e2616257ac9c2d4525a9aeeb42.1638471124.git.thomas.lendacky@amd.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      ad5b3532
    • Sean Christopherson's avatar
      KVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary · a655276a
      Sean Christopherson authored
      Use kvzalloc() to allocate KVM's buffer for SEV-ES's GHCB scratch area so
      that KVM falls back to __vmalloc() if physically contiguous memory isn't
      available.  The buffer is purely a KVM software construct, i.e. there's
      no need for it to be physically contiguous.
      
      Cc: Tom Lendacky <thomas.lendacky@amd.com>
      Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
      Message-Id: <20211109222350.2266045-3-seanjc@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      a655276a
    • Sean Christopherson's avatar
      KVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails · 75236f5f
      Sean Christopherson authored
      Return appropriate error codes if setting up the GHCB scratch area for an
      SEV-ES guest fails.  In particular, returning -EINVAL instead of -ENOMEM
      when allocating the kernel buffer could be confusing as userspace would
      likely suspect a guest issue.
      
      Fixes: 8f423a80 ("KVM: SVM: Support MMIO for an SEV-ES guest")
      Cc: Tom Lendacky <thomas.lendacky@amd.com>
      Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
      Message-Id: <20211109222350.2266045-2-seanjc@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      75236f5f
    • Linus Torvalds's avatar
      Merge tag 'xfs-5.16-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 79a72162
      Linus Torvalds authored
      Pull xfs fix from Darrick Wong:
       "Remove an unnecessary (and backwards) rename flags check that
        duplicates a VFS level check"
      
      * tag 'xfs-5.16-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        xfs: remove incorrect ASSERT in xfs_rename
      79a72162
  5. 04 Dec, 2021 5 commits
    • Linus Torvalds's avatar
      Merge tag '5.16-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 · 23b55d67
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Three SMB3 multichannel/fscache fixes and a DFS fix.
      
        In testing multichannel reconnect scenarios recently various problems
        with the cifs.ko implementation of fscache were found (e.g. incorrect
        initialization of fscache cookies in some cases)"
      
      * tag '5.16-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: avoid use of dstaddr as key for fscache client cookie
        cifs: add server conn_id to fscache client cookie
        cifs: wait for tcon resource_id before getting fscache super
        cifs: fix missed refcounting of ipc tcon
      23b55d67
    • Helge Deller's avatar
      parisc: Mark cr16 CPU clocksource unstable on all SMP machines · afdb4a5b
      Helge Deller authored
      In commit c8c37359 ("parisc: Enhance detection of synchronous cr16
      clocksources") I assumed that CPUs on the same physical core are syncronous.
      While booting up the kernel on two different C8000 machines, one with a
      dual-core PA8800 and one with a dual-core PA8900 CPU, this turned out to be
      wrong. The symptom was that I saw a jump in the internal clocks printed to the
      syslog and strange overall behaviour.  On machines which have 4 cores (2
      dual-cores) the problem isn't visible, because the current logic already marked
      the cr16 clocksource unstable in this case.
      
      This patch now marks the cr16 interval timers unstable if we have more than one
      CPU in the system, and it fixes this issue.
      
      Fixes: c8c37359 ("parisc: Enhance detection of synchronous cr16 clocksources")
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: <stable@vger.kernel.org> # v5.15+
      afdb4a5b
    • Helge Deller's avatar
      parisc: Fix "make install" on newer debian releases · 0f9fee4c
      Helge Deller authored
      On newer debian releases the debian-provided "installkernel" script is
      installed in /usr/sbin. Fix the kernel install.sh script to look for the
      script in this directory as well.
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: <stable@vger.kernel.org> # v3.13+
      0f9fee4c
    • Linus Torvalds's avatar
      Merge tag 'block-5.16-2021-12-03' of git://git.kernel.dk/linux-block · bbef3c7a
      Linus Torvalds authored
      Pull block fix from Jens Axboe:
       "A single fix for repeated printk spam from loop"
      
      * tag 'block-5.16-2021-12-03' of git://git.kernel.dk/linux-block:
        loop: Use pr_warn_once() for loop_control_remove() warning
      bbef3c7a
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.16-2021-12-03' of git://git.kernel.dk/linux-block · 8b9a0228
      Linus Torvalds authored
      Pull io_uring fix from Jens Axboe:
       "Just a single fix preventing repeated retries of task_work based io-wq
        thread creation, fixing a regression from when io-wq was made more (a
        bit too much) resilient against signals"
      
      * tag 'io_uring-5.16-2021-12-03' of git://git.kernel.dk/linux-block:
        io-wq: don't retry task_work creation failure on fatal conditions
      8b9a0228