1. 17 Dec, 2020 13 commits
  2. 25 Oct, 2020 17 commits
  3. 24 Oct, 2020 10 commits
    • Linus Torvalds's avatar
      Merge tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-block · d7691390
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
      
       - NVMe pull request from Christoph
           - rdma error handling fixes (Chao Leng)
           - fc error handling and reconnect fixes (James Smart)
           - fix the qid displace when tracing ioctl command (Keith Busch)
           - don't use BLK_MQ_REQ_NOWAIT for passthru (Chaitanya Kulkarni)
           - fix MTDT for passthru (Logan Gunthorpe)
           - blacklist Write Same on more devices (Kai-Heng Feng)
           - fix an uninitialized work struct (zhenwei pi)"
      
       - lightnvm out-of-bounds fix (Colin)
      
       - SG allocation leak fix (Doug)
      
       - rnbd fixes (Gioh, Guoqing, Jack)
      
       - zone error translation fixes (Keith)
      
       - kerneldoc markup fix (Mauro)
      
       - zram lockdep fix (Peter)
      
       - Kill unused io_context members (Yufen)
      
       - NUMA memory allocation cleanup (Xianting)
      
       - NBD config wakeup fix (Xiubo)
      
      * tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-block: (27 commits)
        block: blk-mq: fix a kernel-doc markup
        nvme-fc: shorten reconnect delay if possible for FC
        nvme-fc: wait for queues to freeze before calling update_hr_hw_queues
        nvme-fc: fix error loop in create_hw_io_queues
        nvme-fc: fix io timeout to abort I/O
        null_blk: use zone status for max active/open
        nvmet: don't use BLK_MQ_REQ_NOWAIT for passthru
        nvmet: cleanup nvmet_passthru_map_sg()
        nvmet: limit passthru MTDS by BIO_MAX_PAGES
        nvmet: fix uninitialized work for zero kato
        nvme-pci: disable Write Zeroes on Sandisk Skyhawk
        nvme: use queuedata for nvme_req_qid
        nvme-rdma: fix crash due to incorrect cqe
        nvme-rdma: fix crash when connect rejected
        block: remove unused members for io_context
        blk-mq: remove the calling of local_memory_node()
        zram: Fix __zram_bvec_{read,write}() locking order
        skd_main: remove unused including <linux/version.h>
        sgl_alloc_order: fix memory leak
        lightnvm: fix out-of-bounds write to array devices->info[]
        ...
      d7691390
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.10-2020-10-24' of git://git.kernel.dk/linux-block · af004187
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
      
       - fsize was missed in previous unification of work flags
      
       - Few fixes cleaning up the flags unification creds cases (Pavel)
      
       - Fix NUMA affinities for completely unplugged/replugged node for io-wq
      
       - Two fallout fixes from the set_fs changes. One local to io_uring, one
         for the splice entry point that io_uring uses.
      
       - Linked timeout fixes (Pavel)
      
       - Removal of ->flush() ->files work-around that we don't need anymore
         with referenced files (Pavel)
      
       - Various cleanups (Pavel)
      
      * tag 'io_uring-5.10-2020-10-24' of git://git.kernel.dk/linux-block:
        splice: change exported internal do_splice() helper to take kernel offset
        io_uring: make loop_rw_iter() use original user supplied pointers
        io_uring: remove req cancel in ->flush()
        io-wq: re-set NUMA node affinities if CPUs come online
        io_uring: don't reuse linked_timeout
        io_uring: unify fsize with def->work_flags
        io_uring: fix racy REQ_F_LINK_TIMEOUT clearing
        io_uring: do poll's hash_node init in common code
        io_uring: inline io_poll_task_handler()
        io_uring: remove extra ->file check in poll prep
        io_uring: make cached_cq_overflow non atomic_t
        io_uring: inline io_fail_links()
        io_uring: kill ref get/drop in personality init
        io_uring: flags-based creds init in queue
      af004187
    • Linus Torvalds's avatar
      Merge tag 'libata-5.10-2020-10-24' of git://git.kernel.dk/linux-block · cb6b2897
      Linus Torvalds authored
      Pull libata fixes from Jens Axboe:
       "Two minor libata fixes:
      
         - Fix a DMA boundary mask regression for sata_rcar (Geert)
      
         - kerneldoc markup fix (Mauro)"
      
      * tag 'libata-5.10-2020-10-24' of git://git.kernel.dk/linux-block:
        ata: fix some kernel-doc markups
        ata: sata_rcar: Fix DMA boundary mask
      cb6b2897
    • Linus Torvalds's avatar
      Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 0eac1102
      Linus Torvalds authored
      Pull misc vfs updates from Al Viro:
       "Assorted stuff all over the place (the largest group here is
        Christoph's stat cleanups)"
      
      * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        fs: remove KSTAT_QUERY_FLAGS
        fs: remove vfs_stat_set_lookup_flags
        fs: move vfs_fstatat out of line
        fs: implement vfs_stat and vfs_lstat in terms of vfs_fstatat
        fs: remove vfs_statx_fd
        fs: omfs: use kmemdup() rather than kmalloc+memcpy
        [PATCH] reduce boilerplate in fsid handling
        fs: Remove duplicated flag O_NDELAY occurring twice in VALID_OPEN_FLAGS
        selftests: mount: add nosymfollow tests
        Add a "nosymfollow" mount option.
      0eac1102
    • Linus Torvalds's avatar
      Merge tag 'dma-mapping-5.10-1' of git://git.infradead.org/users/hch/dma-mapping · 1b307ac8
      Linus Torvalds authored
      Pull dma-mapping fixes from Christoph Hellwig:
      
       - document the new dma_{alloc,free}_pages() API
      
       - two fixups for the dma-mapping.h split
      
      * tag 'dma-mapping-5.10-1' of git://git.infradead.org/users/hch/dma-mapping:
        dma-mapping: document dma_{alloc,free}_pages
        dma-mapping: move more functions to dma-map-ops.h
        ARM/sa1111: add a missing include of dma-map-ops.h
      1b307ac8
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 9bf8d8bc
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
       "Two fixes for this merge window, and an unrelated bugfix for a host
        hang"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: ioapic: break infinite recursion on lazy EOI
        KVM: vmx: rename pi_init to avoid conflict with paride
        KVM: x86/mmu: Avoid modulo operator on 64-bit value to fix i386 build
      9bf8d8bc
    • Linus Torvalds's avatar
      Merge tag 'x86_seves_fixes_for_v5.10_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c51ae124
      Linus Torvalds authored
      Pull x86 SEV-ES fixes from Borislav Petkov:
       "Three fixes to SEV-ES to correct setting up the new early pagetable on
        5-level paging machines, to always map boot_params and the kernel
        cmdline, and disable stack protector for ../compressed/head{32,64}.c.
        (Arvind Sankar)"
      
      * tag 'x86_seves_fixes_for_v5.10_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/boot/64: Explicitly map boot_params and command line
        x86/head/64: Disable stack protection for head$(BITS).o
        x86/boot/64: Initialize 5-level paging variables earlier
      c51ae124
    • Willy Tarreau's avatar
      random32: add a selftest for the prandom32 code · c6e169bc
      Willy Tarreau authored
      Given that this code is new, let's add a selftest for it as well.
      It doesn't rely on fixed sets, instead it picks 1024 numbers and
      verifies that they're not more correlated than desired.
      
      Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
      Cc: George Spelvin <lkml@sdf.org>
      Cc: Amit Klein <aksecurity@gmail.com>
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: tytso@mit.edu
      Cc: Florian Westphal <fw@strlen.de>
      Cc: Marc Plumb <lkml.mplumb@gmail.com>
      Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
      c6e169bc
    • Willy Tarreau's avatar
      random32: add noise from network and scheduling activity · 3744741a
      Willy Tarreau authored
      With the removal of the interrupt perturbations in previous random32
      change (random32: make prandom_u32() output unpredictable), the PRNG
      has become 100% deterministic again. While SipHash is expected to be
      way more robust against brute force than the previous Tausworthe LFSR,
      there's still the risk that whoever has even one temporary access to
      the PRNG's internal state is able to predict all subsequent draws till
      the next reseed (roughly every minute). This may happen through a side
      channel attack or any data leak.
      
      This patch restores the spirit of commit f227e3ec ("random32: update
      the net random state on interrupt and activity") in that it will perturb
      the internal PRNG's statee using externally collected noise, except that
      it will not pick that noise from the random pool's bits nor upon
      interrupt, but will rather combine a few elements along the Tx path
      that are collectively hard to predict, such as dev, skb and txq
      pointers, packet length and jiffies values. These ones are combined
      using a single round of SipHash into a single long variable that is
      mixed with the net_rand_state upon each invocation.
      
      The operation was inlined because it produces very small and efficient
      code, typically 3 xor, 2 add and 2 rol. The performance was measured
      to be the same (even very slightly better) than before the switch to
      SipHash; on a 6-core 12-thread Core i7-8700k equipped with a 40G NIC
      (i40e), the connection rate dropped from 556k/s to 555k/s while the
      SYN cookie rate grew from 5.38 Mpps to 5.45 Mpps.
      
      Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
      Cc: George Spelvin <lkml@sdf.org>
      Cc: Amit Klein <aksecurity@gmail.com>
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: tytso@mit.edu
      Cc: Florian Westphal <fw@strlen.de>
      Cc: Marc Plumb <lkml.mplumb@gmail.com>
      Tested-by: default avatarSedat Dilek <sedat.dilek@gmail.com>
      Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
      3744741a
    • George Spelvin's avatar
      random32: make prandom_u32() output unpredictable · c51f8f88
      George Spelvin authored
      Non-cryptographic PRNGs may have great statistical properties, but
      are usually trivially predictable to someone who knows the algorithm,
      given a small sample of their output.  An LFSR like prandom_u32() is
      particularly simple, even if the sample is widely scattered bits.
      
      It turns out the network stack uses prandom_u32() for some things like
      random port numbers which it would prefer are *not* trivially predictable.
      Predictability led to a practical DNS spoofing attack.  Oops.
      
      This patch replaces the LFSR with a homebrew cryptographic PRNG based
      on the SipHash round function, which is in turn seeded with 128 bits
      of strong random key.  (The authors of SipHash have *not* been consulted
      about this abuse of their algorithm.)  Speed is prioritized over security;
      attacks are rare, while performance is always wanted.
      
      Replacing all callers of prandom_u32() is the quick fix.
      Whether to reinstate a weaker PRNG for uses which can tolerate it
      is an open question.
      
      Commit f227e3ec ("random32: update the net random state on interrupt
      and activity") was an earlier attempt at a solution.  This patch replaces
      it.
      Reported-by: default avatarAmit Klein <aksecurity@gmail.com>
      Cc: Willy Tarreau <w@1wt.eu>
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: tytso@mit.edu
      Cc: Florian Westphal <fw@strlen.de>
      Cc: Marc Plumb <lkml.mplumb@gmail.com>
      Fixes: f227e3ec ("random32: update the net random state on interrupt and activity")
      Signed-off-by: default avatarGeorge Spelvin <lkml@sdf.org>
      Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
      [ willy: partial reversal of f227e3ec; moved SIPROUND definitions
        to prandom.h for later use; merged George's prandom_seed() proposal;
        inlined siprand_u32(); replaced the net_rand_state[] array with 4
        members to fix a build issue; cosmetic cleanups to make checkpatch
        happy; fixed RANDOM32_SELFTEST build ]
      Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
      c51f8f88