Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.126739] block nbd0: NBD_DISCONNECT [ 36.131997] kasan: CONFIG_KASAN_INLINE enabled [ 36.136721] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.144422] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.151004] CPU: 1 PID: 8086 Comm: syz-executor944 Not tainted 4.19.190-syzkaller #0 [ 36.159059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.168462] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 36.173323] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 d2 66 8c 0f 84 65 ff ff [ 36.192703] RSP: 0018:ffff888092947270 EFLAGS: 00010006 [ 36.198048] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 36.205301] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 36.212990] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 36.220240] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 36.227492] R13: ffff8880b2786200 R14: 0000000000000110 R15: 0000000000000001 [ 36.234749] FS: 0000000001326300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 36.242955] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.248862] CR2: 0000000020000300 CR3: 00000000af2da000 CR4: 00000000001406e0 [ 36.256140] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.263493] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.270750] Call Trace: [ 36.273343] ? __lock_acquire+0x6de/0x3ff0 [ 36.277564] ? mark_held_locks+0xf0/0xf0 [ 36.281723] ? __lock_acquire+0x6de/0x3ff0 [ 36.285940] ? mark_held_locks+0xf0/0xf0 [ 36.290110] ? __free_object+0xdd/0x1e0 [ 36.294070] ? mark_held_locks+0xf0/0xf0 [ 36.298373] ? mark_held_locks+0xa6/0xf0 [ 36.302497] lock_acquire+0x170/0x3c0 [ 36.306306] ? flush_workqueue+0xe8/0x13e0 [ 36.310544] flush_workqueue+0x117/0x13e0 [ 36.314794] ? flush_workqueue+0xe8/0x13e0 [ 36.319057] ? lock_downgrade+0x720/0x720 [ 36.323212] ? hctx_unlock+0x83/0x140 [ 36.327015] ? check_flush_dependency+0x400/0x400 [ 36.331901] nbd_disconnect_and_put+0x100/0x190 [ 36.336556] nbd_genl_disconnect+0x34f/0x4f0 [ 36.341006] ? nbd_release+0x170/0x170 [ 36.344892] ? nla_parse+0x1b2/0x290 [ 36.348610] genl_family_rcv_msg+0x642/0xc40 [ 36.353002] ? genl_rcv+0x40/0x40 [ 36.356436] ? genl_rcv_msg+0x12f/0x160 [ 36.360494] ? __mutex_add_waiter+0x160/0x160 [ 36.364974] ? __radix_tree_lookup+0x216/0x370 [ 36.369539] genl_rcv_msg+0xbf/0x160 [ 36.373238] netlink_rcv_skb+0x160/0x440 [ 36.377281] ? genl_family_rcv_msg+0xc40/0xc40 [ 36.381845] ? netlink_ack+0xae0/0xae0 [ 36.385827] ? genl_rcv+0x15/0x40 [ 36.389280] genl_rcv+0x24/0x40 [ 36.392567] netlink_unicast+0x4d5/0x690 [ 36.396610] ? netlink_sendskb+0x110/0x110 [ 36.400915] ? _copy_from_iter_full+0x229/0x7c0 [ 36.405589] ? __phys_addr_symbol+0x2c/0x70 [ 36.409897] ? __check_object_size+0x17b/0x3e0 [ 36.414488] netlink_sendmsg+0x6bb/0xc40 [ 36.418545] ? aa_af_perm+0x230/0x230 [ 36.422359] ? nlmsg_notify+0x1a0/0x1a0 [ 36.426341] ? kernel_recvmsg+0x220/0x220 [ 36.430480] ? nlmsg_notify+0x1a0/0x1a0 [ 36.434894] sock_sendmsg+0xc3/0x120 [ 36.439261] ___sys_sendmsg+0x7bb/0x8e0 [ 36.443275] ? copy_msghdr_from_user+0x440/0x440 [ 36.448024] ? apparmor_file_receive+0x160/0x160 [ 36.452820] ? __lockdep_init_map+0x100/0x5a0 [ 36.457304] ? check_preemption_disabled+0x41/0x280 [ 36.462314] ? mark_held_locks+0xf0/0xf0 [ 36.466378] ? percpu_counter_add_batch+0x126/0x180 [ 36.471380] ? alloc_empty_file+0xd7/0x170 [ 36.475602] ? errseq_sample+0x56/0x70 [ 36.479632] ? alloc_file+0x326/0x4d0 [ 36.483432] ? __fd_install+0x1b4/0x610 [ 36.487387] ? __fdget+0x1a0/0x230 [ 36.490927] __x64_sys_sendmsg+0x132/0x220 [ 36.495236] ? __sys_sendmsg+0x1b0/0x1b0 [ 36.499296] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.504647] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.509647] ? do_syscall_64+0x21/0x620 [ 36.513667] do_syscall_64+0xf9/0x620 [ 36.517460] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.522635] RIP: 0033:0x444069 [ 36.525868] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 36.545070] RSP: 002b:00007fff70a94d58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.552947] RAX: ffffffffffffffda RBX: 00000000004004b8 RCX: 0000000000444069 [ 36.560303] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 [ 36.567556] RBP: 0000000000403690 R08: 00000000004004b8 R09: 00000000004004b8 [ 36.574807] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000403720 [ 36.582066] R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004b8 [ 36.589457] Modules linked in: [ 36.592654] ---[ end trace 900cd49fb76c985b ]--- [ 36.597402] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 36.602480] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 d2 66 8c 0f 84 65 ff ff [ 36.621370] RSP: 0018:ffff888092947270 EFLAGS: 00010006 [ 36.626819] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 36.634164] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 36.641435] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 36.648695] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 36.655972] R13: ffff8880b2786200 R14: 0000000000000110 R15: 0000000000000001 [ 36.663531] FS: 0000000001326300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 36.671759] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.677624] CR2: 0000000020000300 CR3: 00000000af2da000 CR4: 00000000001406e0 [ 36.684888] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.692142] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.699391] Kernel panic - not syncing: Fatal exception [ 36.705444] Kernel Offset: disabled [ 36.709074] Rebooting in 86400 seconds..