1. 30 Aug, 2017 11 commits
    • Chris Wilson's avatar
      drm: Release driver tracking before making the object available again · d3f4c196
      Chris Wilson authored
      commit fe4600a5 upstream.
      
      This is the same bug as we fixed in commit f6cd7dae ("drm: Release
      driver references to handle before making it available again"), but now
      the exposure is via the PRIME lookup tables. If we remove the
      object/handle from the PRIME lut, then a new request for the same
      object/fd will generate a new handle, thus for a short window that
      object is known to userspace by two different handles. Fix this by
      releasing the driver tracking before PRIME.
      
      Fixes: 0ff926c7 ("drm/prime: add exported buffers to current fprivs
      imported buffer list (v2)")
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: David Airlie <airlied@linux.ie>
      Cc: Daniel Vetter <daniel.vetter@intel.com>
      Cc: Rob Clark <robdclark@gmail.com>
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Cc: Thierry Reding <treding@nvidia.com>
      Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Signed-off-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20170819120558.6465-1-chris@chris-wilson.co.ukSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d3f4c196
    • Takashi Iwai's avatar
      ALSA: hda - Add stereo mic quirk for Lenovo G50-70 (17aa:3978) · e3d62b2d
      Takashi Iwai authored
      commit bbba6f9d upstream.
      
      Lenovo G50-70 (17aa:3978) with Conexant codec chip requires the
      similar workaround for the inverted stereo dmic like other Lenovo
      models.
      
      Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1020657Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e3d62b2d
    • Takashi Iwai's avatar
      ALSA: core: Fix unexpected error at replacing user TLV · 639ea02e
      Takashi Iwai authored
      commit 88c54cdf upstream.
      
      When user tries to replace the user-defined control TLV, the kernel
      checks the change of its content via memcmp().  The problem is that
      the kernel passes the return value from memcmp() as is.  memcmp()
      gives a non-zero negative value depending on the comparison result,
      and this shall be recognized as an error code.
      
      The patch covers that corner-case, return 1 properly for the changed
      TLV.
      
      Fixes: 8aa9b586 ("[ALSA] Control API - more robust TLV implementation")
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      639ea02e
    • Aaron Ma's avatar
      Input: trackpoint - add new trackpoint firmware ID · ea205266
      Aaron Ma authored
      commit ec667683 upstream.
      
      Synaptics add new TP firmware ID: 0x2 and 0x3, for now both lower 2 bits
      are indicated as TP. Change the constant to bitwise values.
      
      This makes trackpoint to be recognized on Lenovo Carbon X1 Gen5 instead
      of it being identified as "PS/2 Generic Mouse".
      Signed-off-by: default avatarAaron Ma <aaron.ma@canonical.com>
      Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      ea205266
    • Konstantin Khlebnikov's avatar
      net_sched: fix order of queue length updates in qdisc_replace() · 4eebc905
      Konstantin Khlebnikov authored
      
      [ Upstream commit 68a66d14 ]
      
      This important to call qdisc_tree_reduce_backlog() after changing queue
      length. Parent qdisc should deactivate class in ->qlen_notify() called from
      qdisc_tree_reduce_backlog() but this happens only if qdisc->q.qlen in zero.
      
      Missed class deactivations leads to crashes/warnings at picking packets
      from empty qdisc and corrupting state at reactivating this class in future.
      Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
      Fixes: 86a7996c ("net_sched: introduce qdisc_replace() helper")
      Acked-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4eebc905
    • Xin Long's avatar
      net: sched: fix NULL pointer dereference when action calls some targets · 28ae8587
      Xin Long authored
      
      [ Upstream commit 4f8a881a ]
      
      As we know in some target's checkentry it may dereference par.entryinfo
      to check entry stuff inside. But when sched action calls xt_check_target,
      par.entryinfo is set with NULL. It would cause kernel panic when calling
      some targets.
      
      It can be reproduce with:
        # tc qd add dev eth1 ingress handle ffff:
        # tc filter add dev eth1 parent ffff: u32 match u32 0 0 action xt \
          -j ECN --ecn-tcp-remove
      
      It could also crash kernel when using target CLUSTERIP or TPROXY.
      
      By now there's no proper value for par.entryinfo in ipt_init_target,
      but it can not be set with NULL. This patch is to void all these
      panics by setting it with an ipt_entry obj with all members = 0.
      
      Note that this issue has been there since the very beginning.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Acked-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      28ae8587
    • Colin Ian King's avatar
      irda: do not leak initialized list.dev to userspace · 69e12f86
      Colin Ian King authored
      
      [ Upstream commit b024d949 ]
      
      list.dev has not been initialized and so the copy_to_user is copying
      data from the stack back to user space which is a potential
      information leak. Fix this ensuring all of list is initialized to
      zero.
      
      Detected by CoverityScan, CID#1357894 ("Uninitialized scalar variable")
      Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      69e12f86
    • Neal Cardwell's avatar
      tcp: when rearming RTO, if RTO time is in past then fire RTO ASAP · 8621be05
      Neal Cardwell authored
      
      [ Upstream commit cdbeb633 ]
      
      In some situations tcp_send_loss_probe() can realize that it's unable
      to send a loss probe (TLP), and falls back to calling tcp_rearm_rto()
      to schedule an RTO timer. In such cases, sometimes tcp_rearm_rto()
      realizes that the RTO was eligible to fire immediately or at some
      point in the past (delta_us <= 0). Previously in such cases
      tcp_rearm_rto() was scheduling such "overdue" RTOs to happen at now +
      icsk_rto, which caused needless delays of hundreds of milliseconds
      (and non-linear behavior that made reproducible testing
      difficult). This commit changes the logic to schedule "overdue" RTOs
      ASAP, rather than at now + icsk_rto.
      
      Fixes: 6ba8a3b1 ("tcp: Tail loss probe (TLP)")
      Suggested-by: default avatarYuchung Cheng <ycheng@google.com>
      Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
      Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8621be05
    • Alexander Potapenko's avatar
      sctp: fully initialize the IPv6 address in sctp_v6_to_addr() · 82bd5554
      Alexander Potapenko authored
      
      [ Upstream commit 15339e44 ]
      
      KMSAN reported use of uninitialized sctp_addr->v4.sin_addr.s_addr and
      sctp_addr->v6.sin6_scope_id in sctp_v6_cmp_addr() (see below).
      Make sure all fields of an IPv6 address are initialized, which
      guarantees that the IPv4 fields are also initialized.
      
      ==================================================================
       BUG: KMSAN: use of uninitialized memory in sctp_v6_cmp_addr+0x8d4/0x9f0
       net/sctp/ipv6.c:517
       CPU: 2 PID: 31056 Comm: syz-executor1 Not tainted 4.11.0-rc5+ #2944
       Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs
       01/01/2011
       Call Trace:
        dump_stack+0x172/0x1c0 lib/dump_stack.c:42
        is_logbuf_locked mm/kmsan/kmsan.c:59 [inline]
        kmsan_report+0x12a/0x180 mm/kmsan/kmsan.c:938
        native_save_fl arch/x86/include/asm/irqflags.h:18 [inline]
        arch_local_save_flags arch/x86/include/asm/irqflags.h:72 [inline]
        arch_local_irq_save arch/x86/include/asm/irqflags.h:113 [inline]
        __msan_warning_32+0x61/0xb0 mm/kmsan/kmsan_instr.c:467
        sctp_v6_cmp_addr+0x8d4/0x9f0 net/sctp/ipv6.c:517
        sctp_v6_get_dst+0x8c7/0x1630 net/sctp/ipv6.c:290
        sctp_transport_route+0x101/0x570 net/sctp/transport.c:292
        sctp_assoc_add_peer+0x66d/0x16f0 net/sctp/associola.c:651
        sctp_sendmsg+0x35a5/0x4f90 net/sctp/socket.c:1871
        inet_sendmsg+0x498/0x670 net/ipv4/af_inet.c:762
        sock_sendmsg_nosec net/socket.c:633 [inline]
        sock_sendmsg net/socket.c:643 [inline]
        SYSC_sendto+0x608/0x710 net/socket.c:1696
        SyS_sendto+0x8a/0xb0 net/socket.c:1664
        entry_SYSCALL_64_fastpath+0x13/0x94
       RIP: 0033:0x44b479
       RSP: 002b:00007f6213f21c08 EFLAGS: 00000286 ORIG_RAX: 000000000000002c
       RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000044b479
       RDX: 0000000000000041 RSI: 0000000020edd000 RDI: 0000000000000006
       RBP: 00000000007080a8 R08: 0000000020b85fe4 R09: 000000000000001c
       R10: 0000000000040005 R11: 0000000000000286 R12: 00000000ffffffff
       R13: 0000000000003760 R14: 00000000006e5820 R15: 0000000000ff8000
       origin description: ----dst_saddr@sctp_v6_get_dst
       local variable created at:
        sk_fullsock include/net/sock.h:2321 [inline]
        inet6_sk include/linux/ipv6.h:309 [inline]
        sctp_v6_get_dst+0x91/0x1630 net/sctp/ipv6.c:241
        sctp_transport_route+0x101/0x570 net/sctp/transport.c:292
      ==================================================================
       BUG: KMSAN: use of uninitialized memory in sctp_v6_cmp_addr+0x8d4/0x9f0
       net/sctp/ipv6.c:517
       CPU: 2 PID: 31056 Comm: syz-executor1 Not tainted 4.11.0-rc5+ #2944
       Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs
       01/01/2011
       Call Trace:
        dump_stack+0x172/0x1c0 lib/dump_stack.c:42
        is_logbuf_locked mm/kmsan/kmsan.c:59 [inline]
        kmsan_report+0x12a/0x180 mm/kmsan/kmsan.c:938
        native_save_fl arch/x86/include/asm/irqflags.h:18 [inline]
        arch_local_save_flags arch/x86/include/asm/irqflags.h:72 [inline]
        arch_local_irq_save arch/x86/include/asm/irqflags.h:113 [inline]
        __msan_warning_32+0x61/0xb0 mm/kmsan/kmsan_instr.c:467
        sctp_v6_cmp_addr+0x8d4/0x9f0 net/sctp/ipv6.c:517
        sctp_v6_get_dst+0x8c7/0x1630 net/sctp/ipv6.c:290
        sctp_transport_route+0x101/0x570 net/sctp/transport.c:292
        sctp_assoc_add_peer+0x66d/0x16f0 net/sctp/associola.c:651
        sctp_sendmsg+0x35a5/0x4f90 net/sctp/socket.c:1871
        inet_sendmsg+0x498/0x670 net/ipv4/af_inet.c:762
        sock_sendmsg_nosec net/socket.c:633 [inline]
        sock_sendmsg net/socket.c:643 [inline]
        SYSC_sendto+0x608/0x710 net/socket.c:1696
        SyS_sendto+0x8a/0xb0 net/socket.c:1664
        entry_SYSCALL_64_fastpath+0x13/0x94
       RIP: 0033:0x44b479
       RSP: 002b:00007f6213f21c08 EFLAGS: 00000286 ORIG_RAX: 000000000000002c
       RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000044b479
       RDX: 0000000000000041 RSI: 0000000020edd000 RDI: 0000000000000006
       RBP: 00000000007080a8 R08: 0000000020b85fe4 R09: 000000000000001c
       R10: 0000000000040005 R11: 0000000000000286 R12: 00000000ffffffff
       R13: 0000000000003760 R14: 00000000006e5820 R15: 0000000000ff8000
       origin description: ----dst_saddr@sctp_v6_get_dst
       local variable created at:
        sk_fullsock include/net/sock.h:2321 [inline]
        inet6_sk include/linux/ipv6.h:309 [inline]
        sctp_v6_get_dst+0x91/0x1630 net/sctp/ipv6.c:241
        sctp_transport_route+0x101/0x570 net/sctp/transport.c:292
      ==================================================================
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Reviewed-by: default avatarXin Long <lucien.xin@gmail.com>
      Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      82bd5554
    • Eric Dumazet's avatar
      dccp: defer ccid_hc_tx_delete() at dismantle time · e96bad76
      Eric Dumazet authored
      
      [ Upstream commit 120e9dab ]
      
      syszkaller team reported another problem in DCCP [1]
      
      Problem here is that the structure holding RTO timer
      (ccid2_hc_tx_rto_expire() handler) is freed too soon.
      
      We can not use del_timer_sync() to cancel the timer
      since this timer wants to grab socket lock (that would risk a dead lock)
      
      Solution is to defer the freeing of memory when all references to
      the socket were released. Socket timers do own a reference, so this
      should fix the issue.
      
      [1]
      
      ==================================================================
      BUG: KASAN: use-after-free in ccid2_hc_tx_rto_expire+0x51c/0x5c0 net/dccp/ccids/ccid2.c:144
      Read of size 4 at addr ffff8801d2660540 by task kworker/u4:7/3365
      
      CPU: 1 PID: 3365 Comm: kworker/u4:7 Not tainted 4.13.0-rc4+ #3
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Workqueue: events_unbound call_usermodehelper_exec_work
      Call Trace:
       <IRQ>
       __dump_stack lib/dump_stack.c:16 [inline]
       dump_stack+0x194/0x257 lib/dump_stack.c:52
       print_address_description+0x73/0x250 mm/kasan/report.c:252
       kasan_report_error mm/kasan/report.c:351 [inline]
       kasan_report+0x24e/0x340 mm/kasan/report.c:409
       __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
       ccid2_hc_tx_rto_expire+0x51c/0x5c0 net/dccp/ccids/ccid2.c:144
       call_timer_fn+0x233/0x830 kernel/time/timer.c:1268
       expire_timers kernel/time/timer.c:1307 [inline]
       __run_timers+0x7fd/0xb90 kernel/time/timer.c:1601
       run_timer_softirq+0x21/0x80 kernel/time/timer.c:1614
       __do_softirq+0x2f5/0xba3 kernel/softirq.c:284
       invoke_softirq kernel/softirq.c:364 [inline]
       irq_exit+0x1cc/0x200 kernel/softirq.c:405
       exiting_irq arch/x86/include/asm/apic.h:638 [inline]
       smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044
       apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:702
      RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:824 [inline]
      RIP: 0010:__raw_write_unlock_irq include/linux/rwlock_api_smp.h:267 [inline]
      RIP: 0010:_raw_write_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:343
      RSP: 0018:ffff8801cd50eaa8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
      RAX: dffffc0000000000 RBX: ffffffff85a090c0 RCX: 0000000000000006
      RDX: 1ffffffff0b595f3 RSI: 1ffff1003962f989 RDI: ffffffff85acaf98
      RBP: ffff8801cd50eab0 R08: 0000000000000001 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cc96ea60
      R13: dffffc0000000000 R14: ffff8801cc96e4c0 R15: ffff8801cc96e4c0
       </IRQ>
       release_task+0xe9e/0x1a40 kernel/exit.c:220
       wait_task_zombie kernel/exit.c:1162 [inline]
       wait_consider_task+0x29b8/0x33c0 kernel/exit.c:1389
       do_wait_thread kernel/exit.c:1452 [inline]
       do_wait+0x441/0xa90 kernel/exit.c:1523
       kernel_wait4+0x1f5/0x370 kernel/exit.c:1665
       SYSC_wait4+0x134/0x140 kernel/exit.c:1677
       SyS_wait4+0x2c/0x40 kernel/exit.c:1673
       call_usermodehelper_exec_sync kernel/kmod.c:286 [inline]
       call_usermodehelper_exec_work+0x1a0/0x2c0 kernel/kmod.c:323
       process_one_work+0xbf3/0x1bc0 kernel/workqueue.c:2097
       worker_thread+0x223/0x1860 kernel/workqueue.c:2231
       kthread+0x35e/0x430 kernel/kthread.c:231
       ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:425
      
      Allocated by task 21267:
       save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
       save_stack+0x43/0xd0 mm/kasan/kasan.c:447
       set_track mm/kasan/kasan.c:459 [inline]
       kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
       kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
       kmem_cache_alloc+0x127/0x750 mm/slab.c:3561
       ccid_new+0x20e/0x390 net/dccp/ccid.c:151
       dccp_hdlr_ccid+0x27/0x140 net/dccp/feat.c:44
       __dccp_feat_activate+0x142/0x2a0 net/dccp/feat.c:344
       dccp_feat_activate_values+0x34e/0xa90 net/dccp/feat.c:1538
       dccp_rcv_request_sent_state_process net/dccp/input.c:472 [inline]
       dccp_rcv_state_process+0xed1/0x1620 net/dccp/input.c:677
       dccp_v4_do_rcv+0xeb/0x160 net/dccp/ipv4.c:679
       sk_backlog_rcv include/net/sock.h:911 [inline]
       __release_sock+0x124/0x360 net/core/sock.c:2269
       release_sock+0xa4/0x2a0 net/core/sock.c:2784
       inet_wait_for_connect net/ipv4/af_inet.c:557 [inline]
       __inet_stream_connect+0x671/0xf00 net/ipv4/af_inet.c:643
       inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:682
       SYSC_connect+0x204/0x470 net/socket.c:1642
       SyS_connect+0x24/0x30 net/socket.c:1623
       entry_SYSCALL_64_fastpath+0x1f/0xbe
      
      Freed by task 3049:
       save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
       save_stack+0x43/0xd0 mm/kasan/kasan.c:447
       set_track mm/kasan/kasan.c:459 [inline]
       kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
       __cache_free mm/slab.c:3503 [inline]
       kmem_cache_free+0x77/0x280 mm/slab.c:3763
       ccid_hc_tx_delete+0xc5/0x100 net/dccp/ccid.c:190
       dccp_destroy_sock+0x1d1/0x2b0 net/dccp/proto.c:225
       inet_csk_destroy_sock+0x166/0x3f0 net/ipv4/inet_connection_sock.c:833
       dccp_done+0xb7/0xd0 net/dccp/proto.c:145
       dccp_time_wait+0x13d/0x300 net/dccp/minisocks.c:72
       dccp_rcv_reset+0x1d1/0x5b0 net/dccp/input.c:160
       dccp_rcv_state_process+0x8fc/0x1620 net/dccp/input.c:663
       dccp_v4_do_rcv+0xeb/0x160 net/dccp/ipv4.c:679
       sk_backlog_rcv include/net/sock.h:911 [inline]
       __sk_receive_skb+0x33e/0xc00 net/core/sock.c:521
       dccp_v4_rcv+0xef1/0x1c00 net/dccp/ipv4.c:871
       ip_local_deliver_finish+0x2e2/0xba0 net/ipv4/ip_input.c:216
       NF_HOOK include/linux/netfilter.h:248 [inline]
       ip_local_deliver+0x1ce/0x6d0 net/ipv4/ip_input.c:257
       dst_input include/net/dst.h:477 [inline]
       ip_rcv_finish+0x8db/0x19c0 net/ipv4/ip_input.c:397
       NF_HOOK include/linux/netfilter.h:248 [inline]
       ip_rcv+0xc3f/0x17d0 net/ipv4/ip_input.c:488
       __netif_receive_skb_core+0x19af/0x33d0 net/core/dev.c:4417
       __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4455
       process_backlog+0x203/0x740 net/core/dev.c:5130
       napi_poll net/core/dev.c:5527 [inline]
       net_rx_action+0x792/0x1910 net/core/dev.c:5593
       __do_softirq+0x2f5/0xba3 kernel/softirq.c:284
      
      The buggy address belongs to the object at ffff8801d2660100
       which belongs to the cache ccid2_hc_tx_sock of size 1240
      The buggy address is located 1088 bytes inside of
       1240-byte region [ffff8801d2660100, ffff8801d26605d8)
      The buggy address belongs to the page:
      page:ffffea0007499800 count:1 mapcount:0 mapping:ffff8801d2660100 index:0x0 compound_mapcount: 0
      flags: 0x200000000008100(slab|head)
      raw: 0200000000008100 ffff8801d2660100 0000000000000000 0000000100000005
      raw: ffffea00075271a0 ffffea0007538820 ffff8801d3aef9c0 0000000000000000
      page dumped because: kasan: bad access detected
      
      Memory state around the buggy address:
       ffff8801d2660400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
       ffff8801d2660480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      >ffff8801d2660500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
       ffff8801d2660580: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
       ffff8801d2660600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      ==================================================================
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e96bad76
    • Eric Dumazet's avatar
      dccp: purge write queue in dccp_destroy_sock() · a9b7f06c
      Eric Dumazet authored
      
      [ Upstream commit 7749d4ff ]
      
      syzkaller reported that DCCP could have a non empty
      write queue at dismantle time.
      
      WARNING: CPU: 1 PID: 2953 at net/core/stream.c:199 sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
      Kernel panic - not syncing: panic_on_warn set ...
      
      CPU: 1 PID: 2953 Comm: syz-executor0 Not tainted 4.13.0-rc4+ #2
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:16 [inline]
       dump_stack+0x194/0x257 lib/dump_stack.c:52
       panic+0x1e4/0x417 kernel/panic.c:180
       __warn+0x1c4/0x1d9 kernel/panic.c:541
       report_bug+0x211/0x2d0 lib/bug.c:183
       fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
       do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
       do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
       do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
       do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
       invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
      RIP: 0010:sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
      RSP: 0018:ffff8801d182f108 EFLAGS: 00010297
      RAX: ffff8801d1144140 RBX: ffff8801d13cb280 RCX: 0000000000000000
      RDX: 0000000000000000 RSI: ffffffff85137b00 RDI: ffff8801d13cb280
      RBP: ffff8801d182f148 R08: 0000000000000001 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d13cb4d0
      R13: ffff8801d13cb3b8 R14: ffff8801d13cb300 R15: ffff8801d13cb3b8
       inet_csk_destroy_sock+0x175/0x3f0 net/ipv4/inet_connection_sock.c:835
       dccp_close+0x84d/0xc10 net/dccp/proto.c:1067
       inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425
       sock_release+0x8d/0x1e0 net/socket.c:597
       sock_close+0x16/0x20 net/socket.c:1126
       __fput+0x327/0x7e0 fs/file_table.c:210
       ____fput+0x15/0x20 fs/file_table.c:246
       task_work_run+0x18a/0x260 kernel/task_work.c:116
       exit_task_work include/linux/task_work.h:21 [inline]
       do_exit+0xa32/0x1b10 kernel/exit.c:865
       do_group_exit+0x149/0x400 kernel/exit.c:969
       get_signal+0x7e8/0x17e0 kernel/signal.c:2330
       do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
       exit_to_usermode_loop+0x21c/0x2d0 arch/x86/entry/common.c:157
       prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
       syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      a9b7f06c
  2. 25 Aug, 2017 11 commits
  3. 16 Aug, 2017 17 commits
  4. 13 Aug, 2017 1 commit