[ 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 '10.128.0.56' (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 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: [ 80.350918][ T7805] ------------[ cut here ]------------ [ 80.356697][ T7805] refcount_t: underflow; use-after-free. [ 80.378232][ T7805] WARNING: CPU: 1 PID: 7805 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 80.387633][ T7805] Kernel panic - not syncing: panic_on_warn set ... [ 80.394234][ T7805] CPU: 1 PID: 7805 Comm: syz-executor040 Not tainted 5.6.0-syzkaller #0 [ 80.402662][ T7805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.411810][ T7832] ------------[ cut here ]------------ [ 80.412717][ T7805] Call Trace: [ 80.412750][ T7805] dump_stack+0x188/0x20d [ 80.412768][ T7805] ? refcount_warn_saturate+0x120/0x1e0 [ 80.412783][ T7805] panic+0x2e3/0x75c [ 80.412796][ T7805] ? add_taint.cold+0x16/0x16 [ 80.412830][ T7805] ? __probe_kernel_read+0x188/0x1d0 [ 80.418528][ T7832] refcount_t: saturated; leaking memory. [ 80.421673][ T7805] ? __warn.cold+0x14/0x35 [ 80.421687][ T7805] ? __warn+0xd5/0x1c8 [ 80.421703][ T7805] ? refcount_warn_saturate+0x1d1/0x1e0 [ 80.421718][ T7805] __warn.cold+0x2f/0x35 [ 80.421732][ T7805] ? refcount_warn_saturate+0x1d1/0x1e0 [ 80.421747][ T7805] report_bug+0x27b/0x2f0 [ 80.421765][ T7805] do_error_trap+0x12b/0x220 [ 80.426571][ T7832] WARNING: CPU: 0 PID: 7832 at lib/refcount.c:22 refcount_warn_saturate+0x12d/0x1e0 [ 80.431618][ T7805] ? refcount_warn_saturate+0x1d1/0x1e0 [ 80.435488][ T7832] Modules linked in: [ 80.440215][ T7805] do_invalid_op+0x32/0x40 [ 80.440229][ T7805] ? refcount_warn_saturate+0x1d1/0x1e0 [ 80.440241][ T7805] invalid_op+0x23/0x30 [ 80.440258][ T7805] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 80.445544][ T7832] CPU: 0 PID: 7832 Comm: cryptomgr_probe Not tainted 5.6.0-syzkaller #0 [ 80.451185][ T7805] Code: e9 db fe ff ff 48 89 df e8 2c 95 1e fe e9 8a fe ff ff e8 c2 81 e1 fd 48 c7 c7 40 c6 71 88 c6 05 42 be f1 06 01 e8 17 f6 b2 fd <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 80.455609][ T7832] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.459669][ T7805] RSP: 0018:ffffc90002ba7b18 EFLAGS: 00010282 [ 80.465316][ T7832] RIP: 0010:refcount_warn_saturate+0x12d/0x1e0 [ 80.469649][ T7805] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 80.469664][ T7805] RDX: 0000000000000000 RSI: ffffffff815ca861 RDI: fffff52000574f55 [ 80.475232][ T7832] Code: 06 31 ff 89 de e8 a3 83 e1 fd 84 db 0f 85 72 ff ff ff e8 66 82 e1 fd 48 c7 c7 40 c5 71 88 c6 05 e8 be f1 06 01 e8 bb f6 b2 fd <0f> 0b e9 53 ff ff ff e8 47 82 e1 fd 0f b6 1d cf be f1 06 31 ff 89 [ 80.480069][ T7805] RBP: 0000000000000003 R08: ffff8880a8adc600 R09: ffffed1015ce66a1 [ 80.480083][ T7805] R10: ffffed1015ce66a0 R11: ffff8880ae733507 R12: ffff888099c2c07c [ 80.484684][ T7832] RSP: 0018:ffffc90002ca7d60 EFLAGS: 00010282 [ 80.494073][ T7805] R13: ffff88809d8b4900 R14: 0000000000000000 R15: ffff88809d8b4910 [ 80.499625][ T7832] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 80.503528][ T7805] ? vprintk_func+0x81/0x17e [ 80.507907][ T7832] RDX: 0000000000000000 RSI: ffffffff815ca861 RDI: fffff52000594f9e [ 80.513450][ T7805] ? refcount_warn_saturate+0x1d1/0x1e0 [ 80.517578][ T7832] RBP: 0000000000000001 R08: ffff88809866c040 R09: ffffed1015cc45e9 [ 80.523716][ T7805] crypto_destroy_tfm+0x2a1/0x310 [ 80.532451][ T7832] R10: ffffed1015cc45e8 R11: ffff8880ae622f43 R12: ffff888099c2c048 [ 80.532463][ T7832] R13: 0000000000000000 R14: 000000000000240f R15: 0000000000000000 [ 80.552323][ T7805] ? crypto_aead_decrypt+0x180/0x180 [ 80.562387][ T7832] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 80.568457][ T7805] crypto_destroy_tfm+0xb1/0x310 [ 80.574592][ T7832] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.582555][ T7805] ? __sock_release+0x280/0x280 [ 80.590497][ T7832] CR2: 00007ffe69c8cf98 CR3: 00000000a890f000 CR4: 00000000001406f0 [ 80.590509][ T7832] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.610112][ T7805] aead_release+0x2d/0x50 [ 80.610129][ T7805] alg_sock_destruct+0x85/0xe0 [ 80.618118][ T7832] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.618131][ T7832] Call Trace: [ 80.626230][ T7805] ? af_alg_alloc_areq+0x1d0/0x1d0 [ 80.632302][ T7832] crypto_mod_get+0xdd/0xf0 [ 80.640299][ T7805] __sk_destruct+0x4b/0x7c0 [ 80.648721][ T7832] __crypto_alg_lookup+0xed/0x3e0 [ 80.653404][ T7805] ? __sock_release+0x280/0x280 [ 80.661383][ T7832] crypto_alg_lookup+0x57/0x210 [ 80.666949][ T7805] sk_destruct+0xc6/0x100 [ 80.666965][ T7805] __sk_free+0xef/0x3d0 executing program [ 80.674932][ T7832] crypto_alg_mod_lookup+0x6e/0x5b0 [ 80.680021][ T7805] sk_free+0x78/0xa0 [ 80.688496][ T7832] crypto_grab_spawn+0x82/0x3a0 [ 80.696448][ T7805] af_alg_release+0xdb/0x110 [ 80.701726][ T7832] ? padata_alloc_shell+0x1c1/0x260 [ 80.710654][ T7805] __sock_release+0xcd/0x280 [ 80.715573][ T7832] pcrypt_create+0x225/0x850 [ 80.722157][ T7805] sock_close+0x18/0x20 [ 80.726998][ T7832] ? crypto_alg_put+0xd0/0xd0 [ 80.734981][ T7805] __fput+0x2e9/0x860 [ 80.742953][ T7832] cryptomgr_probe+0x79/0x1a0 [ 80.747279][ T7805] task_work_run+0xf4/0x1b0 [ 80.752019][ T7832] ? crypto_alg_put+0xd0/0xd0 [ 80.760059][ T7805] do_exit+0xb34/0x2dd0 [ 80.763425][ T7832] kthread+0x388/0x470 [ 80.768533][ T7805] ? mm_update_next_owner+0x7a0/0x7a0 [ 80.773286][ T7832] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 80.777768][ T7805] ? up_read+0x1ab/0x750 [ 80.782790][ T7832] ret_from_fork+0x24/0x30 [ 80.787618][ T7805] ? mark_held_locks+0x9f/0xe0 [ 80.793395][ T7832] irq event stamp: 104 [ 80.797812][ T7805] ? down_read_nested+0x420/0x420 [ 80.801951][ T7832] hardirqs last enabled at (103): [] _raw_spin_unlock_irq+0x1f/0x80 [ 80.801973][ T7832] hardirqs last disabled at (104): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 80.807180][ T7805] ? handle_mm_fault+0x491/0xa10 [ 80.811063][ T7832] softirqs last enabled at (88): [] __do_softirq+0x6ef/0x9f7 [ 80.815908][ T7805] do_group_exit+0x125/0x340 [ 80.820479][ T7832] softirqs last disabled at (77): [] irq_exit+0x192/0x1d0 [ 80.825668][ T7805] __x64_sys_exit_group+0x3a/0x50 [ 80.830229][ T7832] ---[ end trace 8b3a250600c0c41d ]--- [ 80.834807][ T7805] do_syscall_64+0xf6/0x7d0 [ 80.965062][ T7805] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 80.970936][ T7805] RIP: 0033:0x43ff78 [ 80.974845][ T7805] Code: Bad RIP value. [ 80.978894][ T7805] RSP: 002b:00007fff276f2918 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 80.987901][ T7805] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ff78 [ 80.995855][ T7805] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 81.003825][ T7805] RBP: 00000000004bf850 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 81.011782][ T7805] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000000001 [ 81.019757][ T7805] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 81.029240][ T7805] Kernel Offset: disabled [ 81.033671][ T7805] Rebooting in 86400 seconds..