Warning: Permanently added '10.128.1.80' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.261569] block nbd0: NBD_DISCONNECT [ 35.266141] kasan: CONFIG_KASAN_INLINE enabled [ 35.270714] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.278057] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.284270] CPU: 1 PID: 8095 Comm: syz-executor038 Not tainted 4.19.211-syzkaller #0 [ 35.292139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.301480] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 35.306304] 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 f2 66 8c 0f 84 65 ff ff [ 35.325300] RSP: 0018:ffff88808f50f270 EFLAGS: 00010006 [ 35.330641] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.337975] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 35.345228] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 35.352480] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 35.359794] R13: ffff8880b3da4300 R14: 0000000000000110 R15: 0000000000000001 [ 35.367497] FS: 0000555555ca1300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.375705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.381568] CR2: 00007fc8f94056c0 CR3: 000000009af7a000 CR4: 00000000003406e0 [ 35.388824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.396078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.403335] Call Trace: [ 35.405913] ? __lock_acquire+0x6de/0x3ff0 [ 35.410145] ? mark_held_locks+0xf0/0xf0 [ 35.414186] ? __lock_acquire+0x6de/0x3ff0 [ 35.418402] ? mark_held_locks+0xf0/0xf0 [ 35.422505] ? __free_object+0xdd/0x1e0 [ 35.426461] ? mark_held_locks+0xf0/0xf0 [ 35.430506] ? mark_held_locks+0xa6/0xf0 [ 35.434552] lock_acquire+0x170/0x3c0 [ 35.438337] ? flush_workqueue+0xe8/0x13e0 [ 35.442553] flush_workqueue+0x117/0x13e0 [ 35.446679] ? flush_workqueue+0xe8/0x13e0 [ 35.450896] ? lock_downgrade+0x720/0x720 [ 35.455029] ? hctx_unlock+0x83/0x140 [ 35.458808] ? check_flush_dependency+0x400/0x400 [ 35.463634] nbd_disconnect_and_put+0x100/0x190 [ 35.468294] nbd_genl_disconnect+0x34f/0x4f0 [ 35.472771] ? nbd_release+0x170/0x170 [ 35.476640] ? nla_parse+0x1b2/0x290 [ 35.480332] genl_family_rcv_msg+0x642/0xc40 [ 35.484718] ? genl_rcv+0x40/0x40 [ 35.488149] ? genl_rcv_msg+0x12f/0x160 [ 35.492102] ? mutex_trylock+0x1a0/0x1a0 [ 35.496145] ? __radix_tree_lookup+0x216/0x370 [ 35.500705] genl_rcv_msg+0xbf/0x160 [ 35.504398] netlink_rcv_skb+0x160/0x440 [ 35.508436] ? genl_family_rcv_msg+0xc40/0xc40 [ 35.512997] ? netlink_ack+0xae0/0xae0 [ 35.516863] ? genl_rcv+0x15/0x40 [ 35.520312] genl_rcv+0x24/0x40 [ 35.523573] netlink_unicast+0x4d5/0x690 [ 35.527782] ? netlink_sendskb+0x110/0x110 [ 35.531999] ? _copy_from_iter_full+0x229/0x7c0 [ 35.536657] ? __phys_addr_symbol+0x2c/0x70 [ 35.540966] ? __check_object_size+0x17b/0x3e0 [ 35.545534] netlink_sendmsg+0x6c3/0xc50 [ 35.549581] ? aa_af_perm+0x230/0x230 [ 35.553368] ? nlmsg_notify+0x1f0/0x1f0 [ 35.557322] ? kernel_recvmsg+0x220/0x220 [ 35.561970] ? nlmsg_notify+0x1f0/0x1f0 [ 35.566017] sock_sendmsg+0xc3/0x120 [ 35.569712] ___sys_sendmsg+0x7bb/0x8e0 [ 35.573726] ? copy_msghdr_from_user+0x440/0x440 [ 35.578461] ? netlink_dump+0xc10/0xc10 [ 35.582417] ? nlmsg_notify+0x1f0/0x1f0 [ 35.586384] ? security_socket_recvmsg+0x8f/0xc0 [ 35.591120] ? __sys_recvfrom+0x2cd/0x3a0 [ 35.595246] ? __ia32_sys_send+0x100/0x100 [ 35.599589] ? __fdget+0x1a0/0x230 [ 35.603108] __x64_sys_sendmsg+0x132/0x220 [ 35.607321] ? __sys_sendmsg+0x1b0/0x1b0 [ 35.611371] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.616889] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.621882] ? do_syscall_64+0x21/0x620 [ 35.625833] do_syscall_64+0xf9/0x620 [ 35.629622] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.634797] RIP: 0033:0x7fd98c92f1b9 [ 35.638491] 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 [ 35.657370] RSP: 002b:00007ffdb733dc28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.665054] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd98c92f1b9 [ 35.672388] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 [ 35.679640] RBP: 00007fd98c8ee7e0 R08: 0000000000000000 R09: 0000000000000000 [ 35.686890] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd98c8ee870 [ 35.694137] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.701385] Modules linked in: [ 35.704577] ---[ end trace 89e331dea6edfad3 ]--- [ 35.709316] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 35.714136] 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 f2 66 8c 0f 84 65 ff ff [ 35.733049] RSP: 0018:ffff88808f50f270 EFLAGS: 00010006 [ 35.738389] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.745635] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 35.752882] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 35.760129] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 35.767376] R13: ffff8880b3da4300 R14: 0000000000000110 R15: 0000000000000001 [ 35.774625] FS: 0000555555ca1300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.782833] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.788691] CR2: 00007fc8f94056c0 CR3: 000000009af7a000 CR4: 00000000003406e0 [ 35.795938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.803230] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.810477] Kernel panic - not syncing: Fatal exception [ 35.816055] Kernel Offset: disabled [ 35.819661] Rebooting in 86400 seconds..