1. 04 May, 2019 1 commit
    • YueHaibing's avatar
      ieee802154: hwsim: Fix error handle path in hwsim_init_module · 1cbbbf39
      YueHaibing authored
      KASAN report this:
      
      BUG: unable to handle kernel paging request at fffffbfff834f001
      PGD 237fe8067 P4D 237fe8067 PUD 237e64067 PMD 1c968d067 PTE 0
      Oops: 0000 [#1] SMP KASAN PTI
      CPU: 1 PID: 8871 Comm: syz-executor.0 Tainted: G         C        5.0.0+ #5
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
      RIP: 0010:strcmp+0x31/0xa0 lib/string.c:328
      Code: 00 00 00 00 fc ff df 55 53 48 83 ec 08 eb 0a 84 db 48 89 ef 74 5a 4c 89 e6 48 89 f8 48 89 fa 48 8d 6f 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 48 89 f0 48 89 f2 0f b6 5d
      RSP: 0018:ffff8881e0c57800 EFLAGS: 00010246
      RAX: 1ffffffff834f001 RBX: ffffffffc1a78000 RCX: ffffffff827b9503
      RDX: 0000000000000000 RSI: ffffffffc1a40008 RDI: ffffffffc1a78008
      RBP: ffffffffc1a78009 R08: fffffbfff6a92195 R09: fffffbfff6a92195
      R10: ffff8881e0c578b8 R11: fffffbfff6a92194 R12: ffffffffc1a40008
      R13: dffffc0000000000 R14: ffffffffc1a3e470 R15: ffffffffc1a40000
      FS:  00007fdcc02ff700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: fffffbfff834f001 CR3: 00000001b3134003 CR4: 00000000007606e0
      DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      PKRU: 55555554
      Call Trace:
       genl_family_find_byname+0x7f/0xf0 net/netlink/genetlink.c:104
       genl_register_family+0x1e1/0x1070 net/netlink/genetlink.c:333
       ? 0xffffffffc1978000
       hwsim_init_module+0x6a/0x1000 [mac802154_hwsim]
       ? 0xffffffffc1978000
       ? 0xffffffffc1978000
       ? 0xffffffffc1978000
       do_one_initcall+0xbc/0x47d init/main.c:887
       do_init_module+0x1b5/0x547 kernel/module.c:3456
       load_module+0x6405/0x8c10 kernel/module.c:3804
       __do_sys_finit_module+0x162/0x190 kernel/module.c:3898
       do_syscall_64+0x9f/0x450 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      RIP: 0033:0x462e99
      Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
      RSP: 002b:00007fdcc02fec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
      RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
      RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
      RBP: 00007fdcc02fec70 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdcc02ff6bc
      R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004
      Modules linked in: mac802154_hwsim(+) mac802154 ieee802154 speakup(C) rc_proteus_2309 rtc_rk808 streebog_generic rds vboxguest madera_spi madera da9052_wdt mISDN_core ueagle_atm usbatm atm ir_imon_decoder scsi_transport_sas rc_dntv_live_dvb_t panel_samsung_s6d16d0 drm drm_panel_orientation_quirks lib80211 fb_agm1264k_fl(C) gspca_pac7302 gspca_main videobuf2_v4l2 soundwire_intel_init i2c_dln2 dln2 usbcore hid_gaff 88pm8607 nfnetlink axp20x_i2c axp20x uio pata_marvell pmbus_core snd_sonicvibes gameport snd_pcm snd_opl3_lib snd_timer snd_hwdep snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore rtc_ds1511 rtc_ds1742 vsock dwc_xlgmac rtc_rx8010 libphy twofish_x86_64_3way twofish_x86_64 twofish_common ad5696_i2c ad5686 lp8788_charger cxd2880_spi dvb_core videobuf2_common videodev media videobuf2_vmalloc videobuf2_memops fbtft(C) sysimgblt sysfillrect syscopyarea fb_sys_fops janz_ican3 firewire_net firewire_core crc_itu_t spi_slave_system_control i2c_matroxfb i2c_algo_bit
       matroxfb_base fb fbdev matroxfb_DAC1064 matroxfb_accel cfbcopyarea cfbimgblt cfbfillrect matroxfb_Ti3026 matroxfb_g450 g450_pll matroxfb_misc leds_blinkm ti_dac7311 intel_spi_pci intel_spi spi_nor hid_elan hid async_tx rc_cinergy_1400 rc_core intel_ishtp kxcjk_1013 industrialio_triggered_buffer kfifo_buf can_dev intel_th spi_pxa2xx_platform pata_artop vme_ca91cx42 gb_gbphy(C) greybus(C) industrialio mptbase st_drv cmac ttpci_eeprom via_wdt gpio_xra1403 mtd iptable_security iptable_raw iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter ip6_vti ip_vti ip_gre ipip sit tunnel4 ip_tunnel hsr veth netdevsim vxcan batman_adv cfg80211 rfkill chnl_net caif nlmon dummy team bonding vcan bridge stp llc ip6_gre gre ip6_tunnel tunnel6 tun joydev mousedev ppdev kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 input_leds crypto_simd cryptd glue_helper ide_pci_generic piix psmouse
       ide_core serio_raw ata_generic i2c_piix4 pata_acpi parport_pc parport floppy rtc_cmos intel_agp intel_gtt agpgart sch_fq_codel ip_tables x_tables sha1_ssse3 sha1_generic ipv6 [last unloaded: speakup]
      Dumping ftrace buffer:
         (ftrace buffer empty)
      CR2: fffffbfff834f001
      ---[ end trace 5aa772c793e0e971 ]---
      RIP: 0010:strcmp+0x31/0xa0 lib/string.c:328
      Code: 00 00 00 00 fc ff df 55 53 48 83 ec 08 eb 0a 84 db 48 89 ef 74 5a 4c 89 e6 48 89 f8 48 89 fa 48 8d 6f 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 48 89 f0 48 89 f2 0f b6 5d
      RSP: 0018:ffff8881e0c57800 EFLAGS: 00010246
      RAX: 1ffffffff834f001 RBX: ffffffffc1a78000 RCX: ffffffff827b9503
      RDX: 0000000000000000 RSI: ffffffffc1a40008 RDI: ffffffffc1a78008
      RBP: ffffffffc1a78009 R08: fffffbfff6a92195 R09: fffffbfff6a92195
      R10: ffff8881e0c578b8 R11: fffffbfff6a92194 R12: ffffffffc1a40008
      R13: dffffc0000000000 R14: ffffffffc1a3e470 R15: ffffffffc1a40000
      FS:  00007fdcc02ff700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: fffffbfff834f001 CR3: 00000001b3134003 CR4: 00000000007606e0
      DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      PKRU: 55555554
      
      The error handing path misplace the cleanup in hwsim_init_module,
      switch the two cleanup functions to fix above issues.
      Reported-by: default avatarHulk Robot <hulkci@huawei.com>
      Fixes: f25da51f ("ieee802154: hwsim: add replacement for fakelb")
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Acked-by: default avatarAlexander Aring <aring@mojatatu.com>
      Signed-off-by: default avatarStefan Schmidt <stefan@datenfreihafen.org>
      1cbbbf39
  2. 30 Apr, 2019 3 commits
    • Eric Dumazet's avatar
      ipv6/flowlabel: wait rcu grace period before put_pid() · 6c0afef5
      Eric Dumazet authored
      syzbot was able to catch a use-after-free read in pid_nr_ns() [1]
      
      ip6fl_seq_show() seems to use RCU protection, dereferencing fl->owner.pid
      but fl_free() releases fl->owner.pid before rcu grace period is started.
      
      [1]
      
      BUG: KASAN: use-after-free in pid_nr_ns+0x128/0x140 kernel/pid.c:407
      Read of size 4 at addr ffff888094012a04 by task syz-executor.0/18087
      
      CPU: 0 PID: 18087 Comm: syz-executor.0 Not tainted 5.1.0-rc6+ #89
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:77 [inline]
       dump_stack+0x172/0x1f0 lib/dump_stack.c:113
       print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
       kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
       __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131
       pid_nr_ns+0x128/0x140 kernel/pid.c:407
       ip6fl_seq_show+0x2f8/0x4f0 net/ipv6/ip6_flowlabel.c:794
       seq_read+0xad3/0x1130 fs/seq_file.c:268
       proc_reg_read+0x1fe/0x2c0 fs/proc/inode.c:227
       do_loop_readv_writev fs/read_write.c:701 [inline]
       do_loop_readv_writev fs/read_write.c:688 [inline]
       do_iter_read+0x4a9/0x660 fs/read_write.c:922
       vfs_readv+0xf0/0x160 fs/read_write.c:984
       kernel_readv fs/splice.c:358 [inline]
       default_file_splice_read+0x475/0x890 fs/splice.c:413
       do_splice_to+0x12a/0x190 fs/splice.c:876
       splice_direct_to_actor+0x2d2/0x970 fs/splice.c:953
       do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
       do_sendfile+0x597/0xd00 fs/read_write.c:1443
       __do_sys_sendfile64 fs/read_write.c:1498 [inline]
       __se_sys_sendfile64 fs/read_write.c:1490 [inline]
       __x64_sys_sendfile64+0x15a/0x220 fs/read_write.c:1490
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      RIP: 0033:0x458da9
      Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
      RSP: 002b:00007f300d24bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
      RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458da9
      RDX: 00000000200000c0 RSI: 0000000000000008 RDI: 0000000000000007
      RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
      R10: 000000000000005a R11: 0000000000000246 R12: 00007f300d24c6d4
      R13: 00000000004c5fa3 R14: 00000000004da748 R15: 00000000ffffffff
      
      Allocated by task 17543:
       save_stack+0x45/0xd0 mm/kasan/common.c:75
       set_track mm/kasan/common.c:87 [inline]
       __kasan_kmalloc mm/kasan/common.c:497 [inline]
       __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470
       kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:505
       slab_post_alloc_hook mm/slab.h:437 [inline]
       slab_alloc mm/slab.c:3393 [inline]
       kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3555
       alloc_pid+0x55/0x8f0 kernel/pid.c:168
       copy_process.part.0+0x3b08/0x7980 kernel/fork.c:1932
       copy_process kernel/fork.c:1709 [inline]
       _do_fork+0x257/0xfd0 kernel/fork.c:2226
       __do_sys_clone kernel/fork.c:2333 [inline]
       __se_sys_clone kernel/fork.c:2327 [inline]
       __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
      Freed by task 7789:
       save_stack+0x45/0xd0 mm/kasan/common.c:75
       set_track mm/kasan/common.c:87 [inline]
       __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459
       kasan_slab_free+0xe/0x10 mm/kasan/common.c:467
       __cache_free mm/slab.c:3499 [inline]
       kmem_cache_free+0x86/0x260 mm/slab.c:3765
       put_pid.part.0+0x111/0x150 kernel/pid.c:111
       put_pid+0x20/0x30 kernel/pid.c:105
       fl_free+0xbe/0xe0 net/ipv6/ip6_flowlabel.c:102
       ip6_fl_gc+0x295/0x3e0 net/ipv6/ip6_flowlabel.c:152
       call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
       expire_timers kernel/time/timer.c:1362 [inline]
       __run_timers kernel/time/timer.c:1681 [inline]
       __run_timers kernel/time/timer.c:1649 [inline]
       run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
       __do_softirq+0x266/0x95a kernel/softirq.c:293
      
      The buggy address belongs to the object at ffff888094012a00
       which belongs to the cache pid_2 of size 88
      The buggy address is located 4 bytes inside of
       88-byte region [ffff888094012a00, ffff888094012a58)
      The buggy address belongs to the page:
      page:ffffea0002500480 count:1 mapcount:0 mapping:ffff88809a483080 index:0xffff888094012980
      flags: 0x1fffc0000000200(slab)
      raw: 01fffc0000000200 ffffea00018a3508 ffffea0002524a88 ffff88809a483080
      raw: ffff888094012980 ffff888094012000 000000010000001b 0000000000000000
      page dumped because: kasan: bad access detected
      
      Memory state around the buggy address:
       ffff888094012900: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
       ffff888094012980: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
      >ffff888094012a00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
                         ^
       ffff888094012a80: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
       ffff888094012b00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
      
      Fixes: 4f82f457 ("net ip6 flowlabel: Make owner a union of struct pid * and kuid_t")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6c0afef5
    • Stephen Suryaputra's avatar
      vrf: Use orig netdev to count Ip6InNoRoutes and a fresh route lookup when sending dest unreach · 1d3fd8a1
      Stephen Suryaputra authored
      When there is no route to an IPv6 dest addr, skb_dst(skb) points
      to loopback dev in the case of that the IP6CB(skb)->iif is
      enslaved to a vrf. This causes Ip6InNoRoutes to be incremented on the
      loopback dev. This also causes the lookup to fail on icmpv6_send() and
      the dest unreachable to not sent and Ip6OutNoRoutes gets incremented on
      the loopback dev.
      
      To reproduce:
      * Gateway configuration:
              ip link add dev vrf_258 type vrf table 258
              ip link set dev enp0s9 master vrf_258
              ip addr add 66:1/64 dev enp0s9
              ip -6 route add unreachable default metric 8192 table 258
              sysctl -w net.ipv6.conf.all.forwarding=1
              sysctl -w net.ipv6.conf.enp0s9.forwarding=1
      * Sender configuration:
              ip addr add 66::2/64 dev enp0s9
              ip -6 route add default via 66::1
      and ping 67::1 for example from the sender.
      
      Fix this by counting on the original netdev and reset the skb dst to
      force a fresh lookup.
      
      v2: Fix typo of destination address in the repro steps.
      v3: Simplify the loopback check (per David Ahern) and use reverse
          Christmas tree format (per David Miller).
      Signed-off-by: default avatarStephen Suryaputra <ssuryaextr@gmail.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Tested-by: default avatarDavid Ahern <dsahern@gmail.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1d3fd8a1
    • Eric Dumazet's avatar
      tcp: add sanity tests in tcp_add_backlog() · ca2fe295
      Eric Dumazet authored
      Richard and Bruno both reported that my commit added a bug,
      and Bruno was able to determine the problem came when a segment
      wih a FIN packet was coalesced to a prior one in tcp backlog queue.
      
      It turns out the header prediction in tcp_rcv_established()
      looks back to TCP headers in the packet, not in the metadata
      (aka TCP_SKB_CB(skb)->tcp_flags)
      
      The fast path in tcp_rcv_established() is not supposed to
      handle a FIN flag (it does not call tcp_fin())
      
      Therefore we need to make sure to propagate the FIN flag,
      so that the coalesced packet does not go through the fast path,
      the same than a GRO packet carrying a FIN flag.
      
      While we are at it, make sure we do not coalesce packets with
      RST or SYN, or if they do not have ACK set.
      
      Many thanks to Richard and Bruno for pinpointing the bad commit,
      and to Richard for providing a first version of the fix.
      
      Fixes: 4f693b55 ("tcp: implement coalescing on backlog queue")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarRichard Purdie <richard.purdie@linuxfoundation.org>
      Reported-by: default avatarBruno Prémont <bonbons@sysophe.eu>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ca2fe295
  3. 29 Apr, 2019 3 commits
  4. 28 Apr, 2019 4 commits
  5. 27 Apr, 2019 7 commits
  6. 26 Apr, 2019 12 commits
  7. 24 Apr, 2019 10 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · cd8dead0
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       "Just the usual assortment of small'ish fixes:
      
         1) Conntrack timeout is sometimes not initialized properly, from
            Alexander Potapenko.
      
         2) Add a reasonable range limit to tcp_min_rtt_wlen to avoid
            undefined behavior. From ZhangXiaoxu.
      
         3) des1 field of descriptor in stmmac driver is initialized with the
            wrong variable. From Yue Haibing.
      
         4) Increase mlxsw pci sw reset timeout a little bit more, from Ido
            Schimmel.
      
         5) Match IOT2000 stmmac devices more accurately, from Su Bao Cheng.
      
         6) Fallback refcount fix in TLS code, from Jakub Kicinski.
      
         7) Fix max MTU check when using XDP in mlx5, from Maxim Mikityanskiy.
      
         8) Fix recursive locking in team driver, from Hangbin Liu.
      
         9) Fix tls_set_device_offload_Rx() deadlock, from Jakub Kicinski.
      
        10) Don't use napi_alloc_frag() outside of softiq context of socionext
            driver, from Ilias Apalodimas.
      
        11) MAC address increment overflow in ncsi, from Tao Ren.
      
        12) Fix a regression in 8K/1M pool switching of RDS, from Zhu Yanjun.
      
        13) ipv4_link_failure has to validate the headers that are actually
            there because RAW sockets can pass in arbitrary garbage, from Eric
            Dumazet"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (43 commits)
        ipv4: add sanity checks in ipv4_link_failure()
        net/rose: fix unbound loop in rose_loopback_timer()
        rxrpc: fix race condition in rxrpc_input_packet()
        net: rds: exchange of 8K and 1M pool
        net: vrf: Fix operation not supported when set vrf mac
        net/ncsi: handle overflow when incrementing mac address
        net: socionext: replace napi_alloc_frag with the netdev variant on init
        net: atheros: fix spelling mistake "underun" -> "underrun"
        spi: ST ST95HF NFC: declare missing of table
        spi: Micrel eth switch: declare missing of table
        net: stmmac: move stmmac_check_ether_addr() to driver probe
        netfilter: fix nf_l4proto_log_invalid to log invalid packets
        netfilter: never get/set skb->tstamp
        netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON
        Documentation: decnet: remove reference to CONFIG_DECNET_ROUTE_FWMARK
        dt-bindings: add an explanation for internal phy-mode
        net/tls: don't leak IV and record seq when offload fails
        net/tls: avoid potential deadlock in tls_set_device_offload_rx()
        selftests/net: correct the return value for run_afpackettests
        team: fix possible recursive locking when add slaves
        ...
      cd8dead0
    • Linus Torvalds's avatar
      Merge tag 'leds-for-5.1-rc7' of... · 11bfe647
      Linus Torvalds authored
      Merge tag 'leds-for-5.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
      
      Pull LED update from Jacek Anaszewski:
       "A single change to MAINTAINERS:
      
        We announce a new LED reviewer - Dan Murphy"
      
      * tag 'leds-for-5.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
        MAINTAINERS: LEDs: Add designated reviewer for LED subsystem
      11bfe647
    • Eric Dumazet's avatar
      ipv4: add sanity checks in ipv4_link_failure() · 20ff83f1
      Eric Dumazet authored
      Before calling __ip_options_compile(), we need to ensure the network
      header is a an IPv4 one, and that it is already pulled in skb->head.
      
      RAW sockets going through a tunnel can end up calling ipv4_link_failure()
      with total garbage in the skb, or arbitrary lengthes.
      
      syzbot report :
      
      BUG: KASAN: stack-out-of-bounds in memcpy include/linux/string.h:355 [inline]
      BUG: KASAN: stack-out-of-bounds in __ip_options_echo+0x294/0x1120 net/ipv4/ip_options.c:123
      Write of size 69 at addr ffff888096abf068 by task syz-executor.4/9204
      
      CPU: 0 PID: 9204 Comm: syz-executor.4 Not tainted 5.1.0-rc5+ #77
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:77 [inline]
       dump_stack+0x172/0x1f0 lib/dump_stack.c:113
       print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
       kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
       check_memory_region_inline mm/kasan/generic.c:185 [inline]
       check_memory_region+0x123/0x190 mm/kasan/generic.c:191
       memcpy+0x38/0x50 mm/kasan/common.c:133
       memcpy include/linux/string.h:355 [inline]
       __ip_options_echo+0x294/0x1120 net/ipv4/ip_options.c:123
       __icmp_send+0x725/0x1400 net/ipv4/icmp.c:695
       ipv4_link_failure+0x29f/0x550 net/ipv4/route.c:1204
       dst_link_failure include/net/dst.h:427 [inline]
       vti6_xmit net/ipv6/ip6_vti.c:514 [inline]
       vti6_tnl_xmit+0x10d4/0x1c0c net/ipv6/ip6_vti.c:553
       __netdev_start_xmit include/linux/netdevice.h:4414 [inline]
       netdev_start_xmit include/linux/netdevice.h:4423 [inline]
       xmit_one net/core/dev.c:3292 [inline]
       dev_hard_start_xmit+0x1b2/0x980 net/core/dev.c:3308
       __dev_queue_xmit+0x271d/0x3060 net/core/dev.c:3878
       dev_queue_xmit+0x18/0x20 net/core/dev.c:3911
       neigh_direct_output+0x16/0x20 net/core/neighbour.c:1527
       neigh_output include/net/neighbour.h:508 [inline]
       ip_finish_output2+0x949/0x1740 net/ipv4/ip_output.c:229
       ip_finish_output+0x73c/0xd50 net/ipv4/ip_output.c:317
       NF_HOOK_COND include/linux/netfilter.h:278 [inline]
       ip_output+0x21f/0x670 net/ipv4/ip_output.c:405
       dst_output include/net/dst.h:444 [inline]
       NF_HOOK include/linux/netfilter.h:289 [inline]
       raw_send_hdrinc net/ipv4/raw.c:432 [inline]
       raw_sendmsg+0x1d2b/0x2f20 net/ipv4/raw.c:663
       inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798
       sock_sendmsg_nosec net/socket.c:651 [inline]
       sock_sendmsg+0xdd/0x130 net/socket.c:661
       sock_write_iter+0x27c/0x3e0 net/socket.c:988
       call_write_iter include/linux/fs.h:1866 [inline]
       new_sync_write+0x4c7/0x760 fs/read_write.c:474
       __vfs_write+0xe4/0x110 fs/read_write.c:487
       vfs_write+0x20c/0x580 fs/read_write.c:549
       ksys_write+0x14f/0x2d0 fs/read_write.c:599
       __do_sys_write fs/read_write.c:611 [inline]
       __se_sys_write fs/read_write.c:608 [inline]
       __x64_sys_write+0x73/0xb0 fs/read_write.c:608
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      RIP: 0033:0x458c29
      Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
      RSP: 002b:00007f293b44bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29
      RDX: 0000000000000014 RSI: 00000000200002c0 RDI: 0000000000000003
      RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000246 R12: 00007f293b44c6d4
      R13: 00000000004c8623 R14: 00000000004ded68 R15: 00000000ffffffff
      
      The buggy address belongs to the page:
      page:ffffea00025aafc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
      flags: 0x1fffc0000000000()
      raw: 01fffc0000000000 0000000000000000 ffffffff025a0101 0000000000000000
      raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
      page dumped because: kasan: bad access detected
      
      Memory state around the buggy address:
       ffff888096abef80: 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2
       ffff888096abf000: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00
      >ffff888096abf080: 00 00 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00
                               ^
       ffff888096abf100: 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 00 00 00 00
       ffff888096abf180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
      
      Fixes: ed0de45a ("ipv4: recompile ip options in ipv4_link_failure")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Stephen Suryaputra <ssuryaextr@gmail.com>
      Acked-by: default avatarWillem de Bruijn <willemb@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      20ff83f1
    • Eric Dumazet's avatar
      net/rose: fix unbound loop in rose_loopback_timer() · 0453c682
      Eric Dumazet authored
      This patch adds a limit on the number of skbs that fuzzers can queue
      into loopback_queue. 1000 packets for rose loopback seems more than enough.
      
      Then, since we now have multiple cpus in most linux hosts,
      we also need to limit the number of skbs rose_loopback_timer()
      can dequeue at each round.
      
      rose_loopback_queue() can be drop-monitor friendly, calling
      consume_skb() or kfree_skb() appropriately.
      
      Finally, use mod_timer() instead of del_timer() + add_timer()
      
      syzbot report was :
      
      rcu: INFO: rcu_preempt self-detected stall on CPU
      rcu:    0-...!: (10499 ticks this GP) idle=536/1/0x4000000000000002 softirq=103291/103291 fqs=34
      rcu:     (t=10500 jiffies g=140321 q=323)
      rcu: rcu_preempt kthread starved for 10426 jiffies! g140321 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
      rcu: RCU grace-period kthread stack dump:
      rcu_preempt     I29168    10      2 0x80000000
      Call Trace:
       context_switch kernel/sched/core.c:2877 [inline]
       __schedule+0x813/0x1cc0 kernel/sched/core.c:3518
       schedule+0x92/0x180 kernel/sched/core.c:3562
       schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803
       rcu_gp_fqs_loop kernel/rcu/tree.c:1971 [inline]
       rcu_gp_kthread+0x962/0x17b0 kernel/rcu/tree.c:2128
       kthread+0x357/0x430 kernel/kthread.c:253
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
      NMI backtrace for cpu 0
      CPU: 0 PID: 7632 Comm: kworker/0:4 Not tainted 5.1.0-rc5+ #172
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Workqueue: events iterate_cleanup_work
      Call Trace:
       <IRQ>
       __dump_stack lib/dump_stack.c:77 [inline]
       dump_stack+0x172/0x1f0 lib/dump_stack.c:113
       nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
       nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
       arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
       trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
       rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1223
       print_cpu_stall kernel/rcu/tree.c:1360 [inline]
       check_cpu_stall kernel/rcu/tree.c:1434 [inline]
       rcu_pending kernel/rcu/tree.c:3103 [inline]
       rcu_sched_clock_irq.cold+0x500/0xa4a kernel/rcu/tree.c:2544
       update_process_times+0x32/0x80 kernel/time/timer.c:1635
       tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
       tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
       __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
       __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
       hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
       local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
       smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
       apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
      RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:95
      Code: 89 25 b4 6e ec 08 41 bc f4 ff ff ff e8 cd 5d ea ff 48 c7 05 9e 6e ec 08 00 00 00 00 e9 a4 e9 ff ff 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 48 8b 75 08 65 48 8b 04 25 00 ee 01 00 65 8b 15 c8 60
      RSP: 0018:ffff8880ae807ce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
      RAX: ffff88806fd40640 RBX: dffffc0000000000 RCX: ffffffff863fbc56
      RDX: 0000000000000100 RSI: ffffffff863fbc1d RDI: ffff88808cf94228
      RBP: ffff8880ae807d10 R08: ffff88806fd40640 R09: ffffed1015d00f8b
      R10: ffffed1015d00f8a R11: 0000000000000003 R12: ffff88808cf941c0
      R13: 00000000fffff034 R14: ffff8882166cd840 R15: 0000000000000000
       rose_loopback_timer+0x30d/0x3f0 net/rose/rose_loopback.c:91
       call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
       expire_timers kernel/time/timer.c:1362 [inline]
       __run_timers kernel/time/timer.c:1681 [inline]
       __run_timers kernel/time/timer.c:1649 [inline]
       run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
       __do_softirq+0x266/0x95a kernel/softirq.c:293
       do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027
      
      Fixes: 1da177e4 ("Linux-2.6.12-rc2")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0453c682
    • Eric Dumazet's avatar
      rxrpc: fix race condition in rxrpc_input_packet() · 032be5f1
      Eric Dumazet authored
      After commit 5271953c ("rxrpc: Use the UDP encap_rcv hook"),
      rxrpc_input_packet() is directly called from lockless UDP receive
      path, under rcu_read_lock() protection.
      
      It must therefore use RCU rules :
      
      - udp_sk->sk_user_data can be cleared at any point in this function.
        rcu_dereference_sk_user_data() is what we need here.
      
      - Also, since sk_user_data might have been set in rxrpc_open_socket()
        we must observe a proper RCU grace period before kfree(local) in
        rxrpc_lookup_local()
      
      v4: @local can be NULL in xrpc_lookup_local() as reported by kbuild test robot <lkp@intel.com>
              and Julia Lawall <julia.lawall@lip6.fr>, thanks !
      
      v3,v2 : addressed David Howells feedback, thanks !
      
      syzbot reported :
      
      kasan: CONFIG_KASAN_INLINE enabled
      kasan: GPF could be caused by NULL-ptr deref or user memory access
      general protection fault: 0000 [#1] PREEMPT SMP KASAN
      CPU: 0 PID: 19236 Comm: syz-executor703 Not tainted 5.1.0-rc6 #79
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      RIP: 0010:__lock_acquire+0xbef/0x3fb0 kernel/locking/lockdep.c:3573
      Code: 00 0f 85 a5 1f 00 00 48 81 c4 10 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 4a 21 00 00 49 81 7d 00 20 54 9c 89 0f 84 cf f4
      RSP: 0018:ffff88809d7aef58 EFLAGS: 00010002
      RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
      RDX: 0000000000000026 RSI: 0000000000000000 RDI: 0000000000000001
      RBP: ffff88809d7af090 R08: 0000000000000001 R09: 0000000000000001
      R10: ffffed1015d05bc7 R11: ffff888089428600 R12: 0000000000000000
      R13: 0000000000000130 R14: 0000000000000001 R15: 0000000000000001
      FS:  00007f059044d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: 00000000004b6040 CR3: 00000000955ca000 CR4: 00000000001406f0
      Call Trace:
       lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4211
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
       skb_queue_tail+0x26/0x150 net/core/skbuff.c:2972
       rxrpc_reject_packet net/rxrpc/input.c:1126 [inline]
       rxrpc_input_packet+0x4a0/0x5536 net/rxrpc/input.c:1414
       udp_queue_rcv_one_skb+0xaf2/0x1780 net/ipv4/udp.c:2011
       udp_queue_rcv_skb+0x128/0x730 net/ipv4/udp.c:2085
       udp_unicast_rcv_skb.isra.0+0xb9/0x360 net/ipv4/udp.c:2245
       __udp4_lib_rcv+0x701/0x2ca0 net/ipv4/udp.c:2301
       udp_rcv+0x22/0x30 net/ipv4/udp.c:2482
       ip_protocol_deliver_rcu+0x60/0x8f0 net/ipv4/ip_input.c:208
       ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234
       NF_HOOK include/linux/netfilter.h:289 [inline]
       NF_HOOK include/linux/netfilter.h:283 [inline]
       ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:255
       dst_input include/net/dst.h:450 [inline]
       ip_rcv_finish+0x1e1/0x300 net/ipv4/ip_input.c:413
       NF_HOOK include/linux/netfilter.h:289 [inline]
       NF_HOOK include/linux/netfilter.h:283 [inline]
       ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:523
       __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4987
       __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5099
       netif_receive_skb_internal+0x117/0x660 net/core/dev.c:5202
       napi_frags_finish net/core/dev.c:5769 [inline]
       napi_gro_frags+0xade/0xd10 net/core/dev.c:5843
       tun_get_user+0x2f24/0x3fb0 drivers/net/tun.c:1981
       tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2027
       call_write_iter include/linux/fs.h:1866 [inline]
       do_iter_readv_writev+0x5e1/0x8e0 fs/read_write.c:681
       do_iter_write fs/read_write.c:957 [inline]
       do_iter_write+0x184/0x610 fs/read_write.c:938
       vfs_writev+0x1b3/0x2f0 fs/read_write.c:1002
       do_writev+0x15e/0x370 fs/read_write.c:1037
       __do_sys_writev fs/read_write.c:1110 [inline]
       __se_sys_writev fs/read_write.c:1107 [inline]
       __x64_sys_writev+0x75/0xb0 fs/read_write.c:1107
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
      Fixes: 5271953c ("rxrpc: Use the UDP encap_rcv hook")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Acked-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      032be5f1
    • Dan Murphy's avatar
      MAINTAINERS: LEDs: Add designated reviewer for LED subsystem · 52fb56f7
      Dan Murphy authored
      Add a designated reviewer for the LED subsystem as there
      are already two maintainers assigned.
      Signed-off-by: default avatarDan Murphy <dmurphy@ti.com>
      Acked-by: default avatarPavel Machek <pavel@ucw.cz>
      Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
      52fb56f7
    • Zhu Yanjun's avatar
      net: rds: exchange of 8K and 1M pool · 4b9fc714
      Zhu Yanjun authored
      Before the commit 490ea596 ("RDS: IB: move FMR code to its own file"),
      when the dirty_count is greater than 9/10 of max_items of 8K pool,
      1M pool is used, Vice versa. After the commit 490ea596 ("RDS: IB: move
      FMR code to its own file"), the above is removed. When we make the
      following tests.
      
      Server:
        rds-stress -r 1.1.1.16 -D 1M
      
      Client:
        rds-stress -r 1.1.1.14 -s 1.1.1.16 -D 1M
      
      The following will appear.
      "
      connecting to 1.1.1.16:4000
      negotiated options, tasks will start in 2 seconds
      Starting up..header from 1.1.1.166:4001 to id 4001 bogus
      ..
      tsks  tx/s  rx/s tx+rx K/s  mbi K/s  mbo K/s tx us/c  rtt us
      cpu %
         1    0    0     0.00     0.00     0.00    0.00 0.00 -1.00
         1    0    0     0.00     0.00     0.00    0.00 0.00 -1.00
         1    0    0     0.00     0.00     0.00    0.00 0.00 -1.00
         1    0    0     0.00     0.00     0.00    0.00 0.00 -1.00
         1    0    0     0.00     0.00     0.00    0.00 0.00 -1.00
      ...
      "
      So this exchange between 8K and 1M pool is added back.
      
      Fixes: commit 490ea596 ("RDS: IB: move FMR code to its own file")
      Signed-off-by: default avatarZhu Yanjun <yanjun.zhu@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4b9fc714
    • Miaohe Lin's avatar
      net: vrf: Fix operation not supported when set vrf mac · 6819e3f6
      Miaohe Lin authored
      Vrf device is not able to change mac address now because lack of
      ndo_set_mac_address. Complete this in case some apps need to do
      this.
      Reported-by: default avatarHui Wang <wanghui104@huawei.com>
      Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6819e3f6
    • Kangjie Lu's avatar
      net: ieee802154: fix missing checks for regmap_update_bits · 22e8860c
      Kangjie Lu authored
      regmap_update_bits could fail and deserves a check.
      
      The patch adds the checks and if it fails, returns its error
      code upstream.
      Signed-off-by: default avatarKangjie Lu <kjlu@umn.edu>
      Reviewed-by: default avatarMukesh Ojha <mojha@codeaurora.org>
      Signed-off-by: default avatarStefan Schmidt <stefan@datenfreihafen.org>
      22e8860c
    • Tao Ren's avatar
      net/ncsi: handle overflow when incrementing mac address · 1c5c12ee
      Tao Ren authored
      Previously BMC's MAC address is calculated by simply adding 1 to the
      last byte of network controller's MAC address, and it produces incorrect
      result when network controller's MAC address ends with 0xFF.
      
      The problem can be fixed by calling eth_addr_inc() function to increment
      MAC address; besides, the MAC address is also validated before assigning
      to BMC.
      
      Fixes: cb10c7c0 ("net/ncsi: Add NCSI Broadcom OEM command")
      Signed-off-by: default avatarTao Ren <taoren@fb.com>
      Acked-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
      Acked-by: default avatarSamuel Mendoza-Jonas <sam@mendozajonas.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1c5c12ee