[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 58.976117][ T7775] ------------[ cut here ]------------ [ 58.983338][ T7775] refcount_t: addition on 0; use-after-free. [ 58.993578][ T7775] WARNING: CPU: 0 PID: 7775 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 [ 59.003385][ T7775] Kernel panic - not syncing: panic_on_warn set ... [ 59.009978][ T7775] CPU: 0 PID: 7775 Comm: syz-executor692 Not tainted 5.7.0-rc3-syzkaller #0 [ 59.018766][ T7775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.028807][ T7775] Call Trace: [ 59.032090][ T7775] dump_stack+0x188/0x20d [ 59.036411][ T7775] ? refcount_warn_saturate+0x100/0x1e0 [ 59.041945][ T7775] panic+0x2e3/0x75c [ 59.045828][ T7775] ? add_taint.cold+0x16/0x16 [ 59.050495][ T7775] ? __probe_kernel_read+0x188/0x1d0 [ 59.055812][ T7775] ? __warn.cold+0x14/0x35 [ 59.060286][ T7775] ? __warn+0xd5/0x1c8 [ 59.064357][ T7775] ? refcount_warn_saturate+0x169/0x1e0 [ 59.069948][ T7775] __warn.cold+0x2f/0x35 [ 59.074177][ T7775] ? refcount_warn_saturate+0x169/0x1e0 [ 59.079707][ T7775] report_bug+0x27b/0x2f0 [ 59.084092][ T7775] do_error_trap+0x12b/0x220 [ 59.088887][ T7775] ? refcount_warn_saturate+0x169/0x1e0 [ 59.094429][ T7775] do_invalid_op+0x32/0x40 [ 59.098835][ T7775] ? refcount_warn_saturate+0x169/0x1e0 [ 59.104385][ T7775] invalid_op+0x23/0x30 [ 59.108535][ T7775] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 59.114789][ T7775] Code: 06 31 ff 89 de e8 87 b9 dc fd 84 db 0f 85 36 ff ff ff e8 4a b8 dc fd 48 c7 c7 a0 5b 72 88 c6 05 b2 1c ee 06 01 e8 4f f3 ad fd <0f> 0b e9 17 ff ff ff e8 2b b8 dc fd 0f b6 1d 97 1c ee 06 31 ff 89 [ 59.134426][ T7775] RSP: 0018:ffffc90002797bf8 EFLAGS: 00010286 [ 59.140515][ T7775] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.148606][ T7775] RDX: 0000000000000000 RSI: ffffffff815ce171 RDI: fffff520004f2f71 [ 59.156581][ T7775] RBP: 0000000000000002 R08: ffff88809d9e6400 R09: ffffed1015cc66a9 [ 59.164549][ T7775] R10: ffff8880ae633547 R11: ffffed1015cc66a8 R12: ffff8880a403a048 [ 59.172547][ T7775] R13: ffff88809df99d00 R14: ffffed1013bf33a5 R15: ffff888099925048 [ 59.180521][ T7775] ? vprintk_func+0x81/0x17e [ 59.185103][ T7775] ? refcount_warn_saturate+0x169/0x1e0 [ 59.190646][ T7775] crypto_mod_get+0xc6/0xf0 [ 59.195155][ T7775] crypto_spawn_alg.isra.0+0xa8/0x110 [ 59.200652][ T7775] crypto_spawn_tfm2+0x19/0xb0 [ 59.205414][ T7775] pcrypt_aead_init_tfm+0x144/0x273 [ 59.210692][ T7775] ? pcrypt_create+0x770/0x770 [ 59.215507][ T7775] crypto_aead_init_tfm+0x138/0x1a0 [ 59.220735][ T7775] crypto_create_tfm+0xd5/0x2f0 [ 59.225613][ T7775] crypto_alloc_tfm+0x100/0x340 [ 59.230458][ T7775] ? aead_release+0x50/0x50 [ 59.234953][ T7775] aead_bind+0x69/0x170 [ 59.239130][ T7775] alg_bind+0x260/0x530 [ 59.243308][ T7775] ? security_socket_bind+0x82/0xb0 [ 59.248507][ T7775] __sys_bind+0x20e/0x250 [ 59.252839][ T7775] ? __ia32_sys_socketpair+0xf0/0xf0 [ 59.258120][ T7775] ? switch_fpu_return+0x1db/0x4b0 [ 59.263295][ T7775] ? fpregs_mark_activate+0x320/0x320 [ 59.268699][ T7775] ? trace_hardirqs_off_caller+0x55/0x230 [ 59.274727][ T7775] __x64_sys_bind+0x6f/0xb0 [ 59.279280][ T7775] ? lockdep_hardirqs_on+0x463/0x620 [ 59.284591][ T7775] do_syscall_64+0xf6/0x7d0 [ 59.289101][ T7775] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.294978][ T7775] RIP: 0033:0x441359 [ 59.298866][ T7775] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 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 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.318466][ T7775] RSP: 002b:00007ffd04b593e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 [ 59.326860][ T7775] RAX: ffffffffffffffda RBX: 00000000004a2378 RCX: 0000000000441359 [ 59.334818][ T7775] RDX: 0000000000000058 RSI: 0000000020000040 RDI: 0000000000000003 [ 59.342862][ T7775] RBP: 000000000000e5c5 R08: 00000000004002c8 R09: 00000000004002c8 [ 59.350818][ T7775] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004020d0 [ 59.358776][ T7775] R13: 0000000000402160 R14: 0000000000000000 R15: 0000000000000000 [ 59.368439][ T7775] Kernel Offset: disabled [ 59.372933][ T7775] Rebooting in 86400 seconds..