[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 93.141242][ T27] audit: type=1400 audit(1588137856.925:8): avc: denied { execmem } for pid=7172 comm="syz-executor080" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 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 [ 94.039472][ T7336] ------------[ cut here ]------------ [ 94.046367][ T7336] refcount_t: underflow; use-after-free. [ 94.062744][ T7336] WARNING: CPU: 0 PID: 7336 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 94.073204][ T7336] Kernel panic - not syncing: panic_on_warn set ... [ 94.080760][ T7336] CPU: 0 PID: 7336 Comm: syz-executor080 Not tainted 5.7.0-rc3-syzkaller #0 [ 94.089841][ T7336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.090477][ T7375] ------------[ cut here ]------------ [ 94.100717][ T7336] Call Trace: [ 94.100751][ T7336] dump_stack+0x188/0x20d [ 94.100770][ T7336] ? refcount_warn_saturate+0x1a0/0x1e0 [ 94.100786][ T7336] panic+0x2e3/0x75c [ 94.100800][ T7336] ? add_taint.cold+0x16/0x16 [ 94.100823][ T7336] ? __probe_kernel_read+0x188/0x1d0 [ 94.100834][ T7336] ? __warn.cold+0x14/0x35 [ 94.100844][ T7336] ? __warn+0xd5/0x1c8 [ 94.100857][ T7336] ? refcount_warn_saturate+0x1d1/0x1e0 [ 94.100874][ T7336] __warn.cold+0x2f/0x35 [ 94.110171][ T7375] refcount_t: saturated; leaking memory. [ 94.111096][ T7336] ? irq_work_queue+0xc3/0x100 [ 94.111114][ T7336] ? refcount_warn_saturate+0x1d1/0x1e0 [ 94.111129][ T7336] report_bug+0x27b/0x2f0 [ 94.111149][ T7336] do_error_trap+0x12b/0x220 [ 94.111162][ T7336] ? refcount_warn_saturate+0x1d1/0x1e0 [ 94.111180][ T7336] do_invalid_op+0x32/0x40 [ 94.111193][ T7336] ? refcount_warn_saturate+0x1d1/0x1e0 [ 94.111209][ T7336] invalid_op+0x23/0x30 [ 94.111224][ T7336] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 94.111244][ T7336] Code: e9 db fe ff ff 48 89 df e8 2c 7f 1a fe e9 8a fe ff ff e8 82 b2 dc fd 48 c7 c7 00 5c 72 88 c6 05 e9 16 ee 06 01 e8 87 ed ad fd <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 94.121954][ T7375] WARNING: CPU: 1 PID: 7375 at lib/refcount.c:22 refcount_warn_saturate+0x12d/0x1e0 [ 94.125684][ T7336] RSP: 0018:ffffc90001be7b20 EFLAGS: 00010286 [ 94.130611][ T7375] Modules linked in: [ 94.136262][ T7336] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 94.141005][ T7375] CPU: 1 PID: 7375 Comm: cryptomgr_probe Not tainted 5.7.0-rc3-syzkaller #0 [ 94.145063][ T7336] RDX: 0000000000000000 RSI: ffffffff815ce171 RDI: fffff5200037cf56 [ 94.145077][ T7336] RBP: 0000000000000003 R08: ffff88808ddb6400 R09: ffffed1015cc66a9 [ 94.150853][ T7375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.150877][ T7375] RIP: 0010:refcount_warn_saturate+0x12d/0x1e0 [ 94.155313][ T7336] R10: ffff8880ae633547 R11: ffffed1015cc66a8 R12: ffff88809f93c07c [ 94.155326][ T7336] R13: ffff88809e23b400 R14: 0000000000000000 R15: ffff88809e23b410 [ 94.160949][ T7375] Code: 06 31 ff 89 de e8 63 b4 dc fd 84 db 0f 85 72 ff ff ff e8 26 b3 dc fd 48 c7 c7 00 5b 72 88 c6 05 8f 17 ee 06 01 e8 2b ee ad fd <0f> 0b e9 53 ff ff ff e8 07 b3 dc fd 0f b6 1d 76 17 ee 06 31 ff 89 [ 94.165798][ T7336] ? vprintk_func+0x81/0x17e [ 94.171411][ T7375] RSP: 0018:ffffc90001f07d70 EFLAGS: 00010286 [ 94.175736][ T7336] crypto_destroy_tfm+0x2a1/0x310 [ 94.180575][ T7375] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 94.180587][ T7375] RDX: 0000000000000000 RSI: ffffffff815ce171 RDI: fffff520003e0fa0 [ 94.186214][ T7336] ? crypto_aead_decrypt+0x180/0x180 [ 94.190617][ T7375] RBP: 0000000000000001 R08: ffff8880a7b3c100 R09: ffffed1015ce66a9 [ 94.196565][ T7336] crypto_destroy_tfm+0xb1/0x310 [ 94.201815][ T7375] R10: ffff8880ae733547 R11: ffffed1015ce66a8 R12: ffff88809f93c048 [ 94.201830][ T7375] R13: 0000000000000000 R14: 000000000000240f R15: 0000000000000000 [ 94.208174][ T7336] ? __sock_release+0x280/0x280 [ 94.231594][ T7375] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 94.245540][ T7336] aead_release+0x2d/0x50 [ 94.255857][ T7375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.260365][ T7336] alg_sock_destruct+0x85/0xe0 [ 94.269235][ T7375] CR2: 00007ffdec1a6fec CR3: 00000000a1b6e000 CR4: 00000000001406e0 [ 94.269250][ T7375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.278862][ T7336] ? af_alg_alloc_areq+0x1d0/0x1d0 [ 94.288309][ T7375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.296485][ T7336] __sk_destruct+0x4b/0x7c0 [ 94.307032][ T7375] Call Trace: [ 94.315362][ T7336] ? __sock_release+0x280/0x280 [ 94.324443][ T7375] crypto_mod_get+0xdd/0xf0 [ 94.335557][ T7336] sk_destruct+0xc6/0x100 [ 94.358935][ T7375] __crypto_alg_lookup+0xed/0x3e0 [ 94.363522][ T7336] __sk_free+0xef/0x3d0 [ 94.369826][ T7375] crypto_alg_lookup+0x57/0x210 [ 94.374922][ T7336] sk_free+0x78/0xa0 [ 94.383288][ T7375] crypto_alg_mod_lookup+0x6e/0x5b0 [ 94.391370][ T7336] af_alg_release+0xdb/0x110 [ 94.397336][ T7375] crypto_grab_spawn+0x82/0x3a0 [ 94.405725][ T7336] __sock_release+0xcd/0x280 [ 94.411041][ T7375] ? padata_alloc_shell+0x1c1/0x260 [ 94.421120][ T7336] sock_close+0x18/0x20 [ 94.430839][ T7375] pcrypt_create+0x1f1/0x770 [ 94.436416][ T7336] __fput+0x33e/0x880 [ 94.446458][ T7375] cryptomgr_probe+0x79/0x1a0 [ 94.452450][ T7336] task_work_run+0xf4/0x1b0 [ 94.459277][ T7375] ? crypto_alg_put+0xd0/0xd0 [ 94.464185][ T7336] do_exit+0xb34/0x2dd0 [ 94.473188][ T7375] kthread+0x388/0x470 [ 94.482188][ T7336] ? mm_update_next_owner+0x7a0/0x7a0 [ 94.491415][ T7375] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 94.501768][ T7336] ? up_read+0x1ab/0x750 [ 94.508486][ T7375] ret_from_fork+0x24/0x30 [ 94.513963][ T7336] ? down_read_nested+0x420/0x420 [ 94.522805][ T7375] irq event stamp: 94 [ 94.531337][ T7336] ? handle_mm_fault+0x29e/0x660 [ 94.536505][ T7375] hardirqs last enabled at (93): [] _raw_spin_unlock_irq+0x1f/0x80 [ 94.541927][ T7336] do_group_exit+0x125/0x340 [ 94.546462][ T7375] hardirqs last disabled at (94): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 94.546481][ T7375] softirqs last enabled at (0): [] copy_process+0x1ae7/0x7110 [ 94.551949][ T7336] __x64_sys_exit_group+0x3a/0x50 [ 94.556919][ T7375] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 94.563253][ T7336] do_syscall_64+0xf6/0x7d0 [ 94.570652][ T7375] ---[ end trace 0a63113c95ac5bdb ]--- [ 94.577205][ T7336] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 94.747599][ T7336] RIP: 0033:0x43ffc8 [ 94.751905][ T7336] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 94.773621][ T7336] RSP: 002b:00007ffd619a8288 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 94.782472][ T7336] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ffc8 [ 94.791417][ T7336] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 94.802213][ T7336] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 94.811262][ T7336] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000000001 [ 94.819773][ T7336] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 94.831399][ T7336] Kernel Offset: disabled [ 94.837830][ T7336] Rebooting in 86400 seconds..