1. 21 Mar, 2021 6 commits
  2. 20 Mar, 2021 7 commits
    • Thomas Gleixner's avatar
      genirq: Disable interrupts for force threaded handlers · 81e2073c
      Thomas Gleixner authored
      With interrupt force threading all device interrupt handlers are invoked
      from kernel threads. Contrary to hard interrupt context the invocation only
      disables bottom halfs, but not interrupts. This was an oversight back then
      because any code like this will have an issue:
      
      thread(irq_A)
        irq_handler(A)
          spin_lock(&foo->lock);
      
      interrupt(irq_B)
        irq_handler(B)
          spin_lock(&foo->lock);
      
      This has been triggered with networking (NAPI vs. hrtimers) and console
      drivers where printk() happens from an interrupt which interrupted the
      force threaded handler.
      
      Now people noticed and started to change the spin_lock() in the handler to
      spin_lock_irqsave() which affects performance or add IRQF_NOTHREAD to the
      interrupt request which in turn breaks RT.
      
      Fix the root cause and not the symptom and disable interrupts before
      invoking the force threaded handler which preserves the regular semantics
      and the usefulness of the interrupt force threading as a general debugging
      tool.
      
      For not RT this is not changing much, except that during the execution of
      the threaded handler interrupts are delayed until the handler
      returns. Vs. scheduling and softirq processing there is no difference.
      
      For RT kernels there is no issue.
      
      Fixes: 8d32a307 ("genirq: Provide forced interrupt threading")
      Reported-by: default avatarJohan Hovold <johan@kernel.org>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarJohan Hovold <johan@kernel.org>
      Acked-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Link: https://lore.kernel.org/r/20210317143859.513307808@linutronix.de
      81e2073c
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · 812da4d3
      Linus Torvalds authored
      Pull RISC-V fixes from Palmer Dabbelt:
       "A handful of fixes for 5.12:
      
         - fix the SBI remote fence numbers for hypervisor fences, which had
           been transcribed in the wrong order in Linux. These fences are only
           used with the KVM patches applied.
      
         - fix a whole host of build warnings, these should have no functional
           change.
      
         - fix init_resources() to prevent an off-by-one error from causing an
           out-of-bounds array reference. This was manifesting during boot on
           vexriscv.
      
         - ensure the KASAN mappings are visible before proceeding to use
           them"
      
      * tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
        riscv: Correct SPARSEMEM configuration
        RISC-V: kasan: Declare kasan_shallow_populate() static
        riscv: Ensure page table writes are flushed when initializing KASAN vmalloc
        RISC-V: Fix out-of-bounds accesses in init_resources()
        riscv: Fix compilation error with Canaan SoC
        ftrace: Fix spelling mistake "disabed" -> "disabled"
        riscv: fix bugon.cocci warnings
        riscv: process: Fix no prototype for arch_dup_task_struct
        riscv: ftrace: Use ftrace_get_regs helper
        riscv: process: Fix no prototype for show_regs
        riscv: syscall_table: Reduce W=1 compilation warnings noise
        riscv: time: Fix no prototype for time_init
        riscv: ptrace: Fix no prototype warnings
        riscv: sbi: Fix comment of __sbi_set_timer_v01
        riscv: irq: Fix no prototype warning
        riscv: traps: Fix no prototype warnings
        RISC-V: correct enum sbi_ext_rfence_fid
      812da4d3
    • Linus Torvalds's avatar
      Merge tag '5.12-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6 · bfdc4aa9
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Five cifs/smb3 fixes - three for stable, including an important ACL
        fix and security signature fix"
      
      * tag '5.12-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: fix allocation size on newly created files
        cifs: warn and fail if trying to use rootfs without the config option
        fs/cifs/: fix misspellings using codespell tool
        cifs: Fix preauth hash corruption
        cifs: update new ACE pointer after populate_new_aces.
      bfdc4aa9
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · af97713d
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Eight fixes, all in drivers, all fairly minor either being fixes in
        error legs, memory leaks on teardown, context errors or semantic
        problems"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: mpt3sas: Do not use GFP_KERNEL in atomic context
        scsi: ufs: ufs-mediatek: Correct operator & -> &&
        scsi: sd_zbc: Update write pointer offset cache
        scsi: lpfc: Fix some error codes in debugfs
        scsi: qla2xxx: Fix broken #endif placement
        scsi: st: Fix a use after free in st_open()
        scsi: myrs: Fix a double free in myrs_cleanup()
        scsi: ibmvfc: Free channel_setup_buf during device tear down
      af97713d
    • Linus Torvalds's avatar
      Merge tag 'zonefs-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs · 1c273e10
      Linus Torvalds authored
      Pull zonefs fixes from Damien Le Moal:
      
       - fix inode write open reference count (Chao)
      
       - Fix wrong write offset for asynchronous O_APPEND writes (me)
      
       - Prevent use of sequential zone file as swap files (me)
      
      * tag 'zonefs-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
        zonefs: fix to update .i_wr_refcnt correctly in zonefs_open_zone()
        zonefs: Fix O_APPEND async write handling
        zonefs: prevent use of seq files as swap file
      1c273e10
    • Linus Torvalds's avatar
      Merge tag 'block-5.12-2021-03-19' of git://git.kernel.dk/linux-block · d626c692
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Just an NVMe pull request this week:
      
         - fix tag allocation for keep alive
      
         - fix a unit mismatch for the Write Zeroes limits
      
         - various TCP transport fixes (Sagi Grimberg, Elad Grupi)
      
         - fix iosqes and iocqes validation for discovery controllers (Sagi Grimberg)"
      
      * tag 'block-5.12-2021-03-19' of git://git.kernel.dk/linux-block:
        nvmet-tcp: fix kmap leak when data digest in use
        nvmet: don't check iosqes,iocqes for discovery controllers
        nvme-rdma: fix possible hang when failing to set io queues
        nvme-tcp: fix possible hang when failing to set io queues
        nvme-tcp: fix misuse of __smp_processor_id with preemption enabled
        nvme-tcp: fix a NULL deref when receiving a 0-length r2t PDU
        nvme: fix Write Zeroes limitations
        nvme: allocate the keep alive request using BLK_MQ_REQ_NOWAIT
        nvme: merge nvme_keep_alive into nvme_keep_alive_work
        nvme-fabrics: only reserve a single tag
      d626c692
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block · 0ada2dad
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
       "Quieter week this time, which was both expected and desired. About
        half of the below is fixes for this release, the other half are just
        fixes in general. In detail:
      
         - Fix the freezing of IO threads, by making the freezer not send them
           fake signals. Make them freezable by default.
      
         - Like we did for personalities, move the buffer IDR to xarray. Kills
           some code and avoids a use-after-free on teardown.
      
         - SQPOLL cleanups and fixes (Pavel)
      
         - Fix linked timeout race (Pavel)
      
         - Fix potential completion post use-after-free (Pavel)
      
         - Cleanup and move internal structures outside of general kernel view
           (Stefan)
      
         - Use MSG_SIGNAL for send/recv from io_uring (Stefan)"
      
      * tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block:
        io_uring: don't leak creds on SQO attach error
        io_uring: use typesafe pointers in io_uring_task
        io_uring: remove structures from include/linux/io_uring.h
        io_uring: imply MSG_NOSIGNAL for send[msg]()/recv[msg]() calls
        io_uring: fix sqpoll cancellation via task_work
        io_uring: add generic callback_head helpers
        io_uring: fix concurrent parking
        io_uring: halt SQO submission on ctx exit
        io_uring: replace sqd rw_semaphore with mutex
        io_uring: fix complete_post use ctx after free
        io_uring: fix ->flags races by linked timeouts
        io_uring: convert io_buffer_idr to XArray
        io_uring: allow IO worker threads to be frozen
        kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing
      0ada2dad
  3. 19 Mar, 2021 27 commits