Warning: Permanently added '10.128.10.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.968612][ T6529] ------------[ cut here ]------------ [ 51.974221][ T6529] refcount_t: addition on 0; use-after-free. [ 51.981874][ T6529] WARNING: CPU: 1 PID: 6529 at lib/refcount.c:25 refcount_warn_saturate+0x13d/0x1a0 [ 51.992040][ T6529] Modules linked in: [ 51.995959][ T6529] CPU: 1 PID: 6529 Comm: syz-executor563 Not tainted 5.15.0-rc6-syzkaller #0 [ 52.005903][ T6529] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.016755][ T6529] RIP: 0010:refcount_warn_saturate+0x13d/0x1a0 [ 52.023665][ T6529] Code: c7 80 e1 b3 8a 31 c0 e8 31 8e 3b fd 0f 0b eb a3 e8 b8 79 71 fd c6 05 43 86 b6 09 01 48 c7 c7 e0 e1 b3 8a 31 c0 e8 13 8e 3b fd <0f> 0b eb 85 e8 9a 79 71 fd c6 05 26 86 b6 09 01 48 c7 c7 40 e2 b3 [ 52.044666][ T6529] RSP: 0018:ffffc900012dfed0 EFLAGS: 00010246 [ 52.051720][ T6529] RAX: f8bc46cda99bde00 RBX: 0000000000000002 RCX: ffff88801e03d580 [ 52.060523][ T6529] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 52.069247][ T6529] RBP: 0000000000000002 R08: ffffffff81695fe2 R09: ffffed10173a57a8 [ 52.077237][ T6529] R10: ffffed10173a57a8 R11: 0000000000000000 R12: ffff888078595180 [ 52.085780][ T6529] R13: ffff88806f5e8030 R14: 0000000000000003 R15: dffffc0000000000 [ 52.093991][ T6529] FS: 00005555558b2300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 52.103607][ T6529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.110291][ T6529] CR2: 00007ff91ea21000 CR3: 000000007077c000 CR4: 00000000003506e0 [ 52.118292][ T6529] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.126479][ T6529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.134627][ T6529] Call Trace: [ 52.137912][ T6529] __se_sys_memfd_secret+0x2ea/0x350 [ 52.143366][ T6529] do_syscall_64+0x44/0xd0 [ 52.147803][ T6529] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.154127][ T6529] RIP: 0033:0x7f09de6c7f79 [ 52.158685][ T6529] Code: 28 c3 e8 2a 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 [ 52.178428][ T6529] RSP: 002b:00007ffe81d58a98 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf [ 52.186849][ T6529] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f09de6c7f79 [ 52.194881][ T6529] RDX: 00007f09de68ae83 RSI: 0000000000000012 RDI: 0000000000000000 [ 52.202928][ T6529] RBP: 00007f09de68bf60 R08: 0000000000000000 R09: 0000000000000000 [ 52.210971][ T6529] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f09de68bff0 [ 52.219017][ T6529] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 52.227004][ T6529] Kernel panic - not syncing: panic_on_warn set ... [ 52.233568][ T6529] CPU: 1 PID: 6529 Comm: syz-executor563 Not tainted 5.15.0-rc6-syzkaller #0 [ 52.242306][ T6529] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.252340][ T6529] Call Trace: [ 52.255604][ T6529] dump_stack_lvl+0x1dc/0x2d8 [ 52.260287][ T6529] ? show_regs_print_info+0x12/0x12 [ 52.265498][ T6529] ? log_buf_vmcoreinfo_setup+0x498/0x498 [ 52.271233][ T6529] panic+0x2d6/0x810 [ 52.275119][ T6529] ? __warn+0x13e/0x270 [ 52.279266][ T6529] ? nmi_panic+0x90/0x90 [ 52.283515][ T6529] __warn+0x26a/0x270 [ 52.287492][ T6529] ? refcount_warn_saturate+0x13d/0x1a0 [ 52.293035][ T6529] ? refcount_warn_saturate+0x13d/0x1a0 [ 52.298575][ T6529] report_bug+0x1b1/0x2e0 [ 52.302910][ T6529] handle_bug+0x3d/0x70 [ 52.307050][ T6529] exc_invalid_op+0x16/0x40 [ 52.311533][ T6529] asm_exc_invalid_op+0x12/0x20 [ 52.316364][ T6529] RIP: 0010:refcount_warn_saturate+0x13d/0x1a0 [ 52.322584][ T6529] Code: c7 80 e1 b3 8a 31 c0 e8 31 8e 3b fd 0f 0b eb a3 e8 b8 79 71 fd c6 05 43 86 b6 09 01 48 c7 c7 e0 e1 b3 8a 31 c0 e8 13 8e 3b fd <0f> 0b eb 85 e8 9a 79 71 fd c6 05 26 86 b6 09 01 48 c7 c7 40 e2 b3 [ 52.347374][ T6529] RSP: 0018:ffffc900012dfed0 EFLAGS: 00010246 [ 52.353433][ T6529] RAX: f8bc46cda99bde00 RBX: 0000000000000002 RCX: ffff88801e03d580 [ 52.361385][ T6529] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 52.369335][ T6529] RBP: 0000000000000002 R08: ffffffff81695fe2 R09: ffffed10173a57a8 [ 52.377287][ T6529] R10: ffffed10173a57a8 R11: 0000000000000000 R12: ffff888078595180 [ 52.385303][ T6529] R13: ffff88806f5e8030 R14: 0000000000000003 R15: dffffc0000000000 [ 52.393280][ T6529] ? wake_up_klogd+0xb2/0xf0 [ 52.397892][ T6529] __se_sys_memfd_secret+0x2ea/0x350 [ 52.403169][ T6529] do_syscall_64+0x44/0xd0 [ 52.407619][ T6529] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.413524][ T6529] RIP: 0033:0x7f09de6c7f79 [ 52.417935][ T6529] Code: 28 c3 e8 2a 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 [ 52.437527][ T6529] RSP: 002b:00007ffe81d58a98 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf [ 52.445946][ T6529] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f09de6c7f79 [ 52.453899][ T6529] RDX: 00007f09de68ae83 RSI: 0000000000000012 RDI: 0000000000000000 [ 52.461866][ T6529] RBP: 00007f09de68bf60 R08: 0000000000000000 R09: 0000000000000000 [ 52.469818][ T6529] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f09de68bff0 [ 52.477790][ T6529] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 52.486138][ T6529] Kernel Offset: disabled [ 52.490531][ T6529] Rebooting in 86400 seconds..