Warning: Permanently added '10.128.1.105' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.092572] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program executing program [ 33.158639] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. [ 33.195861] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 33.225746] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. [ 33.265170] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program [ 33.315601] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 33.366080] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. [ 33.395111] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program [ 33.445676] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 33.495781] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.155031] nla_parse: 113 callbacks suppressed [ 38.155039] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.208568] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.264693] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.316051] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.374994] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.429747] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.487738] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.528214] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 38.568698] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program [ 38.627254] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.173758] nla_parse: 109 callbacks suppressed [ 43.173765] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.237549] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.293260] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.350086] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.394908] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.440879] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.495300] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program [ 43.540901] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program [ 43.583079] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. [ 43.622233] netlink: 4 bytes leftover after parsing attributes in process `syz-executor165'. executing program executing program executing program executing program [ 43.854865] ================================================================== [ 43.862305] BUG: KASAN: use-after-free in refcount_dec_not_one+0x71/0x1d0 [ 43.869211] Read of size 4 at addr ffff88809b5698d8 by task syz-executor165/9842 [ 43.876716] [ 43.878327] CPU: 1 PID: 9842 Comm: syz-executor165 Not tainted 4.19.204-syzkaller #0 [ 43.886183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.895516] Call Trace: [ 43.898093] dump_stack+0x1fc/0x2ef [ 43.901703] print_address_description.cold+0x54/0x219 [ 43.906963] kasan_report_error.cold+0x8a/0x1b9 [ 43.911614] ? refcount_dec_not_one+0x71/0x1d0 [ 43.916177] kasan_report+0x8f/0xa0 [ 43.919784] ? refcount_dec_not_one+0x71/0x1d0 [ 43.924348] refcount_dec_not_one+0x71/0x1d0 [ 43.928752] ? refcount_dec_and_test_checked+0x20/0x20 [ 43.934012] ? nbd_config_put+0x5da/0x870 [ 43.938140] refcount_dec_and_mutex_lock+0x1c/0x80 [ 43.943051] nbd_genl_connect+0x11ee/0x1630 [ 43.947361] ? nbd_xmit_timeout+0x730/0x730 [ 43.951666] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 43.956836] ? validate_nla+0x270/0x820 [ 43.960789] ? nla_parse+0x1b2/0x290 [ 43.964488] genl_family_rcv_msg+0x642/0xc40 [ 43.968920] ? genl_rcv+0x40/0x40 [ 43.972360] ? genl_rcv_msg+0x12f/0x160 [ 43.976323] ? mutex_trylock+0x1a0/0x1a0 [ 43.980369] ? __radix_tree_lookup+0x216/0x370 [ 43.984934] genl_rcv_msg+0xbf/0x160 [ 43.988631] netlink_rcv_skb+0x160/0x440 [ 43.992672] ? genl_family_rcv_msg+0xc40/0xc40 [ 43.997247] ? netlink_ack+0xae0/0xae0 [ 44.001116] ? genl_rcv+0x15/0x40 [ 44.004555] genl_rcv+0x24/0x40 [ 44.007813] netlink_unicast+0x4d5/0x690 [ 44.011854] ? netlink_sendskb+0x110/0x110 [ 44.016072] ? _copy_from_iter_full+0x229/0x7c0 [ 44.020721] ? __phys_addr_symbol+0x2c/0x70 [ 44.025022] ? __check_object_size+0x17b/0x3e0 [ 44.029602] netlink_sendmsg+0x6bb/0xc40 [ 44.033646] ? aa_af_perm+0x230/0x230 [ 44.037427] ? nlmsg_notify+0x1a0/0x1a0 [ 44.041382] ? kernel_recvmsg+0x220/0x220 [ 44.045515] ? nlmsg_notify+0x1a0/0x1a0 [ 44.049470] sock_sendmsg+0xc3/0x120 [ 44.053165] ___sys_sendmsg+0x7bb/0x8e0 [ 44.057121] ? copy_msghdr_from_user+0x440/0x440 [ 44.061855] ? netlink_dump+0xc10/0xc10 [ 44.065811] ? nlmsg_notify+0x1a0/0x1a0 [ 44.069769] ? security_socket_recvmsg+0x8f/0xc0 [ 44.074505] ? __sys_recvfrom+0x2cd/0x3a0 [ 44.078633] ? __ia32_sys_send+0x100/0x100 [ 44.082850] ? __fdget+0x1a0/0x230 [ 44.086383] __x64_sys_sendmsg+0x132/0x220 [ 44.090617] ? __sys_sendmsg+0x1b0/0x1b0 [ 44.094664] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.100007] ? trace_hardirqs_off_caller+0x6e/0x210 [ 44.105002] ? do_syscall_64+0x21/0x620 [ 44.108958] do_syscall_64+0xf9/0x620 [ 44.112758] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.117924] RIP: 0033:0x448119 [ 44.121095] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 17 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 44.139996] RSP: 002b:00007ffddda25f48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.147777] RAX: ffffffffffffffda RBX: 00007ffddda25f90 RCX: 0000000000448119 [ 44.155028] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 44.162277] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000004b2080 [ 44.169526] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddda25f80 [ 44.176774] R13: 000000000000ab15 R14: 00007ffddda25f7c R15: 431bde82d7b634db [ 44.184028] [ 44.185636] Allocated by task 9837: [ 44.189247] kmem_cache_alloc_trace+0x12f/0x380 [ 44.193899] nbd_dev_add+0x44/0x890 [ 44.197506] nbd_genl_connect+0x4cc/0x1630 [ 44.201721] genl_family_rcv_msg+0x642/0xc40 [ 44.206109] genl_rcv_msg+0xbf/0x160 [ 44.209800] netlink_rcv_skb+0x160/0x440 [ 44.213838] genl_rcv+0x24/0x40 [ 44.217096] netlink_unicast+0x4d5/0x690 [ 44.221133] netlink_sendmsg+0x6bb/0xc40 [ 44.225172] sock_sendmsg+0xc3/0x120 [ 44.228865] ___sys_sendmsg+0x7bb/0x8e0 [ 44.232818] __x64_sys_sendmsg+0x132/0x220 [ 44.237032] do_syscall_64+0xf9/0x620 [ 44.240811] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.245971] [ 44.247577] Freed by task 9842: [ 44.250834] kfree+0xcc/0x210 [ 44.253937] nbd_put.part.0+0xfe/0x140 [ 44.257806] nbd_config_put+0x6a0/0x870 [ 44.261759] nbd_genl_connect+0x11bb/0x1630 [ 44.266079] genl_family_rcv_msg+0x642/0xc40 [ 44.270468] genl_rcv_msg+0xbf/0x160 [ 44.274173] netlink_rcv_skb+0x160/0x440 [ 44.278212] genl_rcv+0x24/0x40 [ 44.281471] netlink_unicast+0x4d5/0x690 [ 44.285507] netlink_sendmsg+0x6bb/0xc40 [ 44.289546] sock_sendmsg+0xc3/0x120 [ 44.293242] ___sys_sendmsg+0x7bb/0x8e0 [ 44.297193] __x64_sys_sendmsg+0x132/0x220 [ 44.301408] do_syscall_64+0xf9/0x620 [ 44.305190] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.310354] [ 44.311974] The buggy address belongs to the object at ffff88809b569800 [ 44.311974] which belongs to the cache kmalloc-512 of size 512 [ 44.324609] The buggy address is located 216 bytes inside of [ 44.324609] 512-byte region [ffff88809b569800, ffff88809b569a00) [ 44.336471] The buggy address belongs to the page: [ 44.341468] page:ffffea00026d5a40 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 44.349677] flags: 0xfff00000000100(slab) [ 44.353808] raw: 00fff00000000100 ffffea00025ef548 ffffea00026ec508 ffff88813bff0940 [ 44.361668] raw: 0000000000000000 ffff88809b569080 0000000100000006 0000000000000000 [ 44.369537] page dumped because: kasan: bad access detected [ 44.375221] [ 44.376826] Memory state around the buggy address: [ 44.381730] ffff88809b569780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.389068] ffff88809b569800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.396407] >ffff88809b569880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.403743] ^ [ 44.409951] ffff88809b569900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.417286] ffff88809b569980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.424619] ================================================================== [ 44.431963] Disabling lock debugging due to kernel taint [ 44.438502] Kernel panic - not syncing: panic_on_warn set ... [ 44.438502] [ 44.445877] CPU: 1 PID: 9842 Comm: syz-executor165 Tainted: G B 4.19.204-syzkaller #0 [ 44.455134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.464477] Call Trace: [ 44.467063] dump_stack+0x1fc/0x2ef [ 44.470689] panic+0x26a/0x50e [ 44.473885] ? __warn_printk+0xf3/0xf3 [ 44.477769] ? preempt_schedule_common+0x45/0xc0 [ 44.482507] ? ___preempt_schedule+0x16/0x18 [ 44.486894] ? trace_hardirqs_on+0x55/0x210 [ 44.491200] kasan_end_report+0x43/0x49 [ 44.495154] kasan_report_error.cold+0xa7/0x1b9 [ 44.499801] ? refcount_dec_not_one+0x71/0x1d0 [ 44.504360] kasan_report+0x8f/0xa0 [ 44.507971] ? refcount_dec_not_one+0x71/0x1d0 [ 44.512532] refcount_dec_not_one+0x71/0x1d0 [ 44.516919] ? refcount_dec_and_test_checked+0x20/0x20 [ 44.522188] ? nbd_config_put+0x5da/0x870 [ 44.526327] refcount_dec_and_mutex_lock+0x1c/0x80 [ 44.531237] nbd_genl_connect+0x11ee/0x1630 [ 44.535538] ? nbd_xmit_timeout+0x730/0x730 [ 44.539839] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 44.545008] ? validate_nla+0x270/0x820 [ 44.548961] ? nla_parse+0x1b2/0x290 [ 44.552655] genl_family_rcv_msg+0x642/0xc40 [ 44.557043] ? genl_rcv+0x40/0x40 [ 44.560475] ? genl_rcv_msg+0x12f/0x160 [ 44.564427] ? mutex_trylock+0x1a0/0x1a0 [ 44.568477] ? __radix_tree_lookup+0x216/0x370 [ 44.573048] genl_rcv_msg+0xbf/0x160 [ 44.576739] netlink_rcv_skb+0x160/0x440 [ 44.580776] ? genl_family_rcv_msg+0xc40/0xc40 [ 44.585335] ? netlink_ack+0xae0/0xae0 [ 44.589204] ? genl_rcv+0x15/0x40 [ 44.592637] genl_rcv+0x24/0x40 [ 44.595909] netlink_unicast+0x4d5/0x690 [ 44.599962] ? netlink_sendskb+0x110/0x110 [ 44.604174] ? _copy_from_iter_full+0x229/0x7c0 [ 44.608823] ? __phys_addr_symbol+0x2c/0x70 [ 44.613125] ? __check_object_size+0x17b/0x3e0 [ 44.617696] netlink_sendmsg+0x6bb/0xc40 [ 44.621734] ? aa_af_perm+0x230/0x230 [ 44.625525] ? nlmsg_notify+0x1a0/0x1a0 [ 44.629478] ? kernel_recvmsg+0x220/0x220 [ 44.633604] ? nlmsg_notify+0x1a0/0x1a0 [ 44.637555] sock_sendmsg+0xc3/0x120 [ 44.641249] ___sys_sendmsg+0x7bb/0x8e0 [ 44.645209] ? copy_msghdr_from_user+0x440/0x440 [ 44.649943] ? netlink_dump+0xc10/0xc10 [ 44.653894] ? nlmsg_notify+0x1a0/0x1a0 [ 44.657849] ? security_socket_recvmsg+0x8f/0xc0 [ 44.662596] ? __sys_recvfrom+0x2cd/0x3a0 [ 44.666732] ? __ia32_sys_send+0x100/0x100 [ 44.670953] ? __fdget+0x1a0/0x230 [ 44.674547] __x64_sys_sendmsg+0x132/0x220 [ 44.678767] ? __sys_sendmsg+0x1b0/0x1b0 [ 44.682811] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.688155] ? trace_hardirqs_off_caller+0x6e/0x210 [ 44.693151] ? do_syscall_64+0x21/0x620 [ 44.697113] do_syscall_64+0xf9/0x620 [ 44.700897] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.706069] RIP: 0033:0x448119 [ 44.709241] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 17 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 44.728121] RSP: 002b:00007ffddda25f48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.735836] RAX: ffffffffffffffda RBX: 00007ffddda25f90 RCX: 0000000000448119 [ 44.743083] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 44.750329] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000004b2080 [ 44.757589] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddda25f80 [ 44.764842] R13: 000000000000ab15 R14: 00007ffddda25f7c R15: 431bde82d7b634db [ 44.773290] Kernel Offset: disabled [ 44.776902] Rebooting in 86400 seconds..