Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.405513] block nbd0: NBD_DISCONNECT [ 35.409853] kasan: CONFIG_KASAN_INLINE enabled [ 35.414438] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.421802] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.428020] CPU: 0 PID: 8062 Comm: syz-executor754 Not tainted 4.19.172-syzkaller #0 [ 35.435901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.445393] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 35.450466] 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 72 66 8c 0f 84 65 ff ff [ 35.471028] RSP: 0018:ffff8880979ef270 EFLAGS: 00010006 [ 35.477080] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.484353] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 35.491663] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 35.498924] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 35.506270] R13: ffff8880b3e1e580 R14: 0000000000000110 R15: 0000000000000001 [ 35.513534] FS: 0000000001ac7300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 35.521752] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.527623] CR2: 0000000020000080 CR3: 00000000985c9000 CR4: 00000000001406f0 [ 35.534900] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.542174] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.549545] Call Trace: [ 35.552133] ? __lock_acquire+0x6de/0x3ff0 [ 35.556371] ? mark_held_locks+0xf0/0xf0 [ 35.560443] ? __lock_acquire+0x6de/0x3ff0 [ 35.565564] ? mark_held_locks+0xf0/0xf0 [ 35.569626] ? __free_object+0xdd/0x1e0 [ 35.573972] ? mark_held_locks+0xf0/0xf0 [ 35.578037] ? mark_held_locks+0xa6/0xf0 [ 35.582083] lock_acquire+0x170/0x3c0 [ 35.585986] ? flush_workqueue+0xe8/0x13e0 [ 35.590227] flush_workqueue+0x117/0x13e0 [ 35.594373] ? flush_workqueue+0xe8/0x13e0 [ 35.598596] ? lock_downgrade+0x720/0x720 [ 35.603049] ? hctx_unlock+0x83/0x140 [ 35.606852] ? check_flush_dependency+0x400/0x400 [ 35.611793] nbd_disconnect_and_put+0x100/0x190 [ 35.617146] nbd_genl_disconnect+0x34f/0x4f0 [ 35.621561] ? nbd_release+0x170/0x170 [ 35.625449] ? nla_parse+0x1b2/0x290 [ 35.629245] genl_family_rcv_msg+0x642/0xc40 [ 35.634251] ? genl_rcv+0x40/0x40 [ 35.637694] ? genl_rcv_msg+0x12f/0x160 [ 35.641677] ? __mutex_add_waiter+0x160/0x160 [ 35.646301] ? __radix_tree_lookup+0x216/0x370 [ 35.650885] genl_rcv_msg+0xbf/0x160 [ 35.654595] netlink_rcv_skb+0x160/0x440 [ 35.658668] ? genl_family_rcv_msg+0xc40/0xc40 [ 35.663265] ? netlink_ack+0xae0/0xae0 [ 35.667372] ? genl_rcv+0x15/0x40 [ 35.670813] genl_rcv+0x24/0x40 [ 35.674083] netlink_unicast+0x4d5/0x690 [ 35.678225] ? netlink_sendskb+0x110/0x110 [ 35.682448] ? _copy_from_iter_full+0x229/0x7c0 [ 35.687129] ? __phys_addr_symbol+0x2c/0x70 [ 35.691435] ? __check_object_size+0x17b/0x3e0 [ 35.696001] netlink_sendmsg+0x6bb/0xc40 [ 35.700155] ? aa_af_perm+0x230/0x230 [ 35.703963] ? nlmsg_notify+0x1a0/0x1a0 [ 35.707965] ? kernel_recvmsg+0x220/0x220 [ 35.712112] ? nlmsg_notify+0x1a0/0x1a0 [ 35.716086] sock_sendmsg+0xc3/0x120 [ 35.719783] ___sys_sendmsg+0x7bb/0x8e0 [ 35.723749] ? lock_acquire+0x170/0x3c0 [ 35.727736] ? copy_msghdr_from_user+0x440/0x440 [ 35.732494] ? lock_downgrade+0x720/0x720 [ 35.736642] ? lock_acquire+0x170/0x3c0 [ 35.744079] ? debug_object_active_state+0x104/0x330 [ 35.749173] ? mark_held_locks+0xf0/0xf0 [ 35.753238] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 35.757834] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 35.762934] ? debug_object_active_state+0x254/0x330 [ 35.768107] ? debug_object_init_on_stack+0x20/0x20 [ 35.773117] ? kfree+0x110/0x210 [ 35.776474] ? __fdget+0x1a0/0x230 [ 35.780011] __x64_sys_sendmsg+0x132/0x220 [ 35.784257] ? __sys_sendmsg+0x1b0/0x1b0 [ 35.788309] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.793677] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.798675] ? do_syscall_64+0x21/0x620 [ 35.802640] do_syscall_64+0xf9/0x620 [ 35.806537] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.811716] RIP: 0033:0x444099 [ 35.814896] 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 [ 35.833801] RSP: 002b:00007fffd66d4808 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.841516] RAX: ffffffffffffffda RBX: 00000000004004b8 RCX: 0000000000444099 [ 35.848784] RDX: 0000000000004800 RSI: 0000000020000240 RDI: 0000000000000004 [ 35.856057] RBP: 00000000004036c0 R08: 0000000000000001 R09: 00000000004004b8 [ 35.863313] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000403750 [ 35.870567] R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004b8 [ 35.877835] Modules linked in: [ 35.881017] ---[ end trace c0fec614c858e19b ]--- [ 35.885784] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 35.890614] 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 72 66 8c 0f 84 65 ff ff [ 35.909904] RSP: 0018:ffff8880979ef270 EFLAGS: 00010006 [ 35.915255] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.922704] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 35.929978] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 35.937245] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 35.944500] R13: ffff8880b3e1e580 R14: 0000000000000110 R15: 0000000000000001 [ 35.951770] FS: 0000000001ac7300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 35.960021] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.965887] CR2: 0000000020000080 CR3: 00000000985c9000 CR4: 00000000001406f0 [ 35.973145] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.980423] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.987699] Kernel panic - not syncing: Fatal exception [ 35.993745] Kernel Offset: disabled [ 35.997375] Rebooting in 86400 seconds..