1. 15 Apr, 2017 4 commits
    • Linus Torvalds's avatar
      vfs: don't do RCU lookup of empty pathnames · c0eb027e
      Linus Torvalds authored
      Normal pathname lookup doesn't allow empty pathnames, but using
      AT_EMPTY_PATH (with name_to_handle_at() or fstatat(), for example) you
      can trigger an empty pathname lookup.
      
      And not only is the RCU lookup in that case entirely unnecessary
      (because we'll obviously immediately finalize the end result), it is
      actively wrong.
      
      Why? An empth path is a special case that will return the original
      'dirfd' dentry - and that dentry may not actually be RCU-free'd,
      resulting in a potential use-after-free if we were to initialize the
      path lazily under the RCU read lock and depend on complete_walk()
      finalizing the dentry.
      
      Found by syzkaller and KASAN.
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Reported-by: default avatarVegard Nossum <vegard.nossum@gmail.com>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c0eb027e
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 1bf4b126
      Linus Torvalds authored
      Pull input fixes from Dmitry Torokhov:
       "Just a small update to xpad driver to recognize yet another gamepad,
        and another change making sure userio.h is exported"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: xpad - add support for Razer Wildcat gamepad
        uapi: add missing install of userio.h
      1bf4b126
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 7e703ecc
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       "Things seem to be settling down as far as networking is concerned,
        let's hope this trend continues...
      
         1) Add iov_iter_revert() and use it to fix the behavior of
            skb_copy_datagram_msg() et al., from Al Viro.
      
         2) Fix the protocol used in the synthetic SKB we cons up for the
            purposes of doing a simulated route lookup for RTM_GETROUTE
            requests. From Florian Larysch.
      
         3) Don't add noop_qdisc to the per-device qdisc hashes, from Cong
            Wang.
      
         4) Don't call netdev_change_features with the team lock held, from
            Xin Long.
      
         5) Revert TCP F-RTO extension to catch more spurious timeouts because
            it interacts very badly with some middle-boxes. From Yuchung
            Cheng.
      
         6) Fix the loss of error values in l2tp {s,g}etsockopt calls, from
            Guillaume Nault.
      
         7) ctnetlink uses bit positions where it should be using bit masks,
            fix from Liping Zhang.
      
         8) Missing RCU locking in netfilter helper code, from Gao Feng.
      
         9) Avoid double frees and use-after-frees in tcp_disconnect(), from
            Eric Dumazet.
      
        10) Don't do a changelink before we register the netdevice in
            bridging, from Ido Schimmel.
      
        11) Lock the ipv6 device address list properly, from Rabin Vincent"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits)
        netfilter: ipt_CLUSTERIP: Fix wrong conntrack netns refcnt usage
        netfilter: nft_hash: do not dump the auto generated seed
        drivers: net: usb: qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201
        ipv6: Fix idev->addr_list corruption
        net: xdp: don't export dev_change_xdp_fd()
        bridge: netlink: register netdevice before executing changelink
        bridge: implement missing ndo_uninit()
        bpf: reference may_access_skb() from __bpf_prog_run()
        tcp: clear saved_syn in tcp_disconnect()
        netfilter: nf_ct_expect: use proper RCU list traversal/update APIs
        netfilter: ctnetlink: skip dumping expect when nfct_help(ct) is NULL
        netfilter: make it safer during the inet6_dev->addr_list traversal
        netfilter: ctnetlink: make it safer when checking the ct helper name
        netfilter: helper: Add the rcu lock when call __nf_conntrack_helper_find
        netfilter: ctnetlink: using bit to represent the ct event
        netfilter: xt_TCPMSS: add more sanity tests on tcph->doff
        net: tcp: Increase TCP_MIB_OUTRSTS even though fail to alloc skb
        l2tp: don't mask errors in pppol2tp_getsockopt()
        l2tp: don't mask errors in pppol2tp_setsockopt()
        tcp: restrict F-RTO to work-around broken middle-boxes
        ...
      7e703ecc
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 91174391
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of small fixes for x86:
      
         - fix locking in RDT to prevent memory leaks and freeing in use
           memory
      
         - prevent setting invalid values for vdso32_enabled which cause
           inconsistencies for user space resulting in application crashes.
      
         - plug a race in the vdso32 code between fork and sysctl which causes
           inconsistencies for user space resulting in application crashes.
      
         - make MPX signal delivery work in compat mode
      
         - make the dmesg output of traps and faults readable again"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/intel_rdt: Fix locking in rdtgroup_schemata_write()
        x86/debug: Fix the printk() debug output of signal_fault(), do_trap() and do_general_protection()
        x86/vdso: Plug race between mapping and ELF header setup
        x86/vdso: Ensure vdso32_enabled gets set to valid values only
        x86/signals: Fix lower/upper bound reporting in compat siginfo
      91174391
  2. 14 Apr, 2017 29 commits
  3. 13 Apr, 2017 7 commits