[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 67.994957][ T6530] ------------[ cut here ]------------
[ 68.000591][ T6530] refcount_t: addition on 0; use-after-free.
[ 68.007413][ T6530] WARNING: CPU: 1 PID: 6530 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0
[ 68.016942][ T6530] Modules linked in:
[ 68.020841][ T6530] CPU: 1 PID: 6530 Comm: syz-executor027 Not tainted 5.15.0-rc6-next-20211022-syzkaller #0
[ 68.031134][ T6530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 68.041330][ T6530] RIP: 0010:refcount_warn_saturate+0x169/0x1e0
[ 68.047570][ T6530] Code: 09 31 ff 89 de e8 27 1f 9f fd 84 db 0f 85 36 ff ff ff e8 3a 1b 9f fd 48 c7 c7 00 2e 04 8a c6 05 c7 25 a3 09 01 e8 92 ce 31 05 <0f> 0b e9 17 ff ff ff e8 1b 1b 9f fd 0f b6 1d ac 25 a3 09 31 ff 89
[ 68.067288][ T6530] RSP: 0018:ffffc90002987f10 EFLAGS: 00010286
[ 68.073440][ T6530] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 68.081537][ T6530] RDX: ffff88801ba78000 RSI: ffffffff815f06f8 RDI: fffff52000530fd4
[ 68.089655][ T6530] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
[ 68.097715][ T6530] R10: ffffffff815ea4ce R11: 0000000000000000 R12: 0000000000000000
[ 68.105874][ T6530] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 68.114084][ T6530] FS: 0000555556f48300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[ 68.123090][ T6530] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 68.130386][ T6530] CR2: 00007ffc79bc8020 CR3: 000000001c76c000 CR4: 00000000003506e0
[ 68.138565][ T6530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 68.146628][ T6530] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 68.154665][ T6530] Call Trace:
[ 68.157967][ T6530]
[ 68.160895][ T6530] __x64_sys_memfd_secret+0x182/0x1e0
[ 68.166691][ T6530] do_syscall_64+0x35/0xb0
[ 68.171134][ T6530] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 68.177101][ T6530] RIP: 0033:0x7f1f04c4bf89
[ 68.181526][ T6530] 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
[ 68.201220][ T6530] RSP: 002b:00007ffc79adf9f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf
[ 68.209756][ T6530] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1f04c4bf89
[ 68.217829][ T6530] RDX: 00007f1f04c0ee93 RSI: 0000000000000012 RDI: 0000000000080000
[ 68.225887][ T6530] RBP: 00007f1f04c0ff70 R08: 0000000000000000 R09: 0000000000000000
[ 68.233943][ T6530] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f1f04c10000
[ 68.241935][ T6530] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 68.249981][ T6530]
[ 68.253065][ T6530] Kernel panic - not syncing: panic_on_warn set ...
[ 68.259658][ T6530] CPU: 1 PID: 6530 Comm: syz-executor027 Not tainted 5.15.0-rc6-next-20211022-syzkaller #0
[ 68.269703][ T6530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 68.279754][ T6530] Call Trace:
[ 68.283024][ T6530]
[ 68.285941][ T6530] dump_stack_lvl+0xcd/0x134
[ 68.290534][ T6530] panic+0x2b0/0x6dd
[ 68.294419][ T6530] ? __warn_printk+0xf3/0xf3
[ 68.298997][ T6530] ? __warn.cold+0x1a/0x44
[ 68.303416][ T6530] ? refcount_warn_saturate+0x169/0x1e0
[ 68.308963][ T6530] __warn.cold+0x35/0x44
[ 68.313190][ T6530] ? wake_up_klogd.part.0+0x9e/0xd0
[ 68.318386][ T6530] ? refcount_warn_saturate+0x169/0x1e0
[ 68.323919][ T6530] report_bug+0x1bd/0x210
[ 68.328241][ T6530] handle_bug+0x3c/0x60
[ 68.332396][ T6530] exc_invalid_op+0x14/0x40
[ 68.336900][ T6530] asm_exc_invalid_op+0x12/0x20
[ 68.341923][ T6530] RIP: 0010:refcount_warn_saturate+0x169/0x1e0
[ 68.348067][ T6530] Code: 09 31 ff 89 de e8 27 1f 9f fd 84 db 0f 85 36 ff ff ff e8 3a 1b 9f fd 48 c7 c7 00 2e 04 8a c6 05 c7 25 a3 09 01 e8 92 ce 31 05 <0f> 0b e9 17 ff ff ff e8 1b 1b 9f fd 0f b6 1d ac 25 a3 09 31 ff 89
[ 68.367659][ T6530] RSP: 0018:ffffc90002987f10 EFLAGS: 00010286
[ 68.373726][ T6530] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 68.381682][ T6530] RDX: ffff88801ba78000 RSI: ffffffff815f06f8 RDI: fffff52000530fd4
[ 68.389635][ T6530] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
[ 68.397586][ T6530] R10: ffffffff815ea4ce R11: 0000000000000000 R12: 0000000000000000
[ 68.405543][ T6530] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 68.413528][ T6530] ? wake_up_klogd.part.0+0x8e/0xd0
[ 68.418716][ T6530] ? vprintk+0x88/0x90
[ 68.422773][ T6530] __x64_sys_memfd_secret+0x182/0x1e0
[ 68.428218][ T6530] do_syscall_64+0x35/0xb0
[ 68.432635][ T6530] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 68.438519][ T6530] RIP: 0033:0x7f1f04c4bf89
[ 68.442933][ T6530] 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
[ 68.462525][ T6530] RSP: 002b:00007ffc79adf9f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001bf
[ 68.470924][ T6530] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1f04c4bf89
[ 68.478877][ T6530] RDX: 00007f1f04c0ee93 RSI: 0000000000000012 RDI: 0000000000080000
[ 68.486918][ T6530] RBP: 00007f1f04c0ff70 R08: 0000000000000000 R09: 0000000000000000
[ 68.494885][ T6530] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f1f04c10000
[ 68.502840][ T6530] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 68.510818][ T6530]
[ 68.514158][ T6530] Kernel Offset: disabled
[ 68.518552][ T6530] Rebooting in 86400 seconds..