[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   54.834944][ T6519] ------------[ cut here ]------------
[   54.840416][ T6519] refcount_t: addition on 0; use-after-free.
[   54.847066][ T6519] WARNING: CPU: 1 PID: 6519 at lib/refcount.c:25 refcount_warn_saturate+0x13d/0x1a0
[   54.856557][ T6519] Modules linked in:
[   54.860452][ T6519] CPU: 1 PID: 6519 Comm: syz-executor570 Not tainted 5.15.0-rc6-syzkaller #0
[   54.869354][ T6519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.879537][ T6519] RIP: 0010:refcount_warn_saturate+0x13d/0x1a0
[   54.885812][ T6519] 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
[   54.905519][ T6519] RSP: 0018:ffffc900014dfed0 EFLAGS: 00010246
[   54.911623][ T6519] RAX: f1edd9615e736100 RBX: 0000000000000002 RCX: ffff88801a6f1c80
[   54.919693][ T6519] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[   54.927759][ T6519] RBP: 0000000000000002 R08: ffffffff81695fe2 R09: ffffed10173a57a8
[   54.935856][ T6519] R10: ffffed10173a57a8 R11: 0000000000000000 R12: ffff8880258c9900
[   54.943926][ T6519] R13: ffff888071dbedc0 R14: 0000000000000003 R15: dffffc0000000000
[   54.951923][ T6519] FS:  0000555556b16300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[   54.960942][ T6519] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   54.967656][ T6519] CR2: 00007f0a2b914330 CR3: 0000000073408000 CR4: 00000000003506e0
[   54.976027][ T6519] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   54.984096][ T6519] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   54.992283][ T6519] Call Trace:
[   54.995579][ T6519]  __se_sys_memfd_secret+0x2ea/0x350
[   55.000962][ T6519]  do_syscall_64+0x44/0xd0
[   55.005460][ T6519]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   55.011356][ T6519] RIP: 0033:0x7f0a2b902f89
[   55.015959][ T6519] 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
[   55.035666][ T6519] RSP: 002b:00007fff8e742228 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf
[   55.044185][ T6519] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0a2b902f89
[   55.052291][ T6519] RDX: 00007f0a2b8c5e93 RSI: 0000000000000012 RDI: 0000000000080000
[   55.060271][ T6519] RBP: 00007f0a2b8c6f70 R08: 0000000000000000 R09: 0000000000000000
[   55.068335][ T6519] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0a2b8c7000
[   55.076381][ T6519] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   55.084474][ T6519] Kernel panic - not syncing: panic_on_warn set ...
[   55.091098][ T6519] CPU: 1 PID: 6519 Comm: syz-executor570 Not tainted 5.15.0-rc6-syzkaller #0
[   55.099863][ T6519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.109989][ T6519] Call Trace:
[   55.113268][ T6519]  dump_stack_lvl+0x1dc/0x2d8
[   55.117929][ T6519]  ? show_regs_print_info+0x12/0x12
[   55.123107][ T6519]  ? log_buf_vmcoreinfo_setup+0x498/0x498
[   55.128813][ T6519]  panic+0x2d6/0x810
[   55.132690][ T6519]  ? __warn+0x13e/0x270
[   55.136828][ T6519]  ? nmi_panic+0x90/0x90
[   55.141059][ T6519]  __warn+0x26a/0x270
[   55.145104][ T6519]  ? refcount_warn_saturate+0x13d/0x1a0
[   55.150631][ T6519]  ? refcount_warn_saturate+0x13d/0x1a0
[   55.156154][ T6519]  report_bug+0x1b1/0x2e0
[   55.160466][ T6519]  handle_bug+0x3d/0x70
[   55.164600][ T6519]  exc_invalid_op+0x16/0x40
[   55.169080][ T6519]  asm_exc_invalid_op+0x12/0x20
[   55.173908][ T6519] RIP: 0010:refcount_warn_saturate+0x13d/0x1a0
[   55.180038][ T6519] 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
[   55.199710][ T6519] RSP: 0018:ffffc900014dfed0 EFLAGS: 00010246
[   55.205842][ T6519] RAX: f1edd9615e736100 RBX: 0000000000000002 RCX: ffff88801a6f1c80
[   55.213797][ T6519] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[   55.221771][ T6519] RBP: 0000000000000002 R08: ffffffff81695fe2 R09: ffffed10173a57a8
[   55.229766][ T6519] R10: ffffed10173a57a8 R11: 0000000000000000 R12: ffff8880258c9900
[   55.237726][ T6519] R13: ffff888071dbedc0 R14: 0000000000000003 R15: dffffc0000000000
[   55.245694][ T6519]  ? wake_up_klogd+0xb2/0xf0
[   55.250274][ T6519]  __se_sys_memfd_secret+0x2ea/0x350
[   55.255558][ T6519]  do_syscall_64+0x44/0xd0
[   55.259960][ T6519]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   55.265844][ T6519] RIP: 0033:0x7f0a2b902f89
[   55.270252][ T6519] 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
[   55.289844][ T6519] RSP: 002b:00007fff8e742228 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf
[   55.298239][ T6519] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0a2b902f89
[   55.306191][ T6519] RDX: 00007f0a2b8c5e93 RSI: 0000000000000012 RDI: 0000000000080000
[   55.314155][ T6519] RBP: 00007f0a2b8c6f70 R08: 0000000000000000 R09: 0000000000000000
[   55.322122][ T6519] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0a2b8c7000
[   55.330104][ T6519] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   55.338335][ T6519] Kernel Offset: disabled
[   55.342796][ T6519] Rebooting in 86400 seconds..