Warning: Permanently added '10.128.1.16' (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 syzkaller login: [ 57.548414][ T25] ------------[ cut here ]------------ [ 57.553886][ T25] refcount_t: addition on 0; use-after-free. [ 57.560085][ T25] WARNING: CPU: 1 PID: 25 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 [ 57.569279][ T25] Modules linked in: [ 57.573174][ T25] CPU: 1 PID: 25 Comm: kworker/u4:1 Tainted: G W 5.13.0-syzkaller #0 [ 57.582562][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.592608][ T25] Workqueue: qrtr_ns_handler qrtr_ns_worker [ 57.598502][ T25] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 57.604641][ T25] Code: 0a 31 ff 89 de e8 47 73 a2 fd 84 db 0f 85 36 ff ff ff e8 fa 6c a2 fd 48 c7 c7 a0 2d e3 89 c6 05 02 b5 03 0a 01 e8 24 1a 0c 05 <0f> 0b e9 17 ff ff ff e8 db 6c a2 fd 0f b6 1d e7 b4 03 0a 31 ff 89 [ 57.624229][ T25] RSP: 0018:ffffc90000dffa00 EFLAGS: 00010082 [ 57.630274][ T25] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 57.638226][ T25] RDX: ffff888015da1c40 RSI: ffffffff815d7235 RDI: fffff520001bff32 [ 57.646185][ T25] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 57.654139][ T25] R10: ffffffff815d109e R11: 0000000000000000 R12: ffff8881441d0000 [ 57.662213][ T25] R13: ffff888021ffa800 R14: ffff888035bb8df0 R15: ffff888035bb8df4 [ 57.670215][ T25] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 57.679131][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.685696][ T25] CR2: 00007ffea272d828 CR3: 00000000176fa000 CR4: 00000000001506e0 [ 57.693664][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.701612][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.709573][ T25] Call Trace: [ 57.712850][ T25] qrtr_recvmsg+0x85a/0x990 [ 57.717340][ T25] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 57.722609][ T25] ? lock_release+0x522/0x720 [ 57.727315][ T25] ? lock_downgrade+0x6e0/0x6e0 [ 57.732148][ T25] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 57.738372][ T25] ? security_socket_recvmsg+0x8f/0xc0 [ 57.743840][ T25] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 57.749106][ T25] kernel_recvmsg+0x110/0x160 [ 57.753778][ T25] qrtr_ns_worker+0x15a/0x1710 [ 57.758523][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 57.763442][ T25] ? ctrl_cmd_bye+0xc20/0xc20 [ 57.768100][ T25] ? do_raw_spin_unlock+0x171/0x230 [ 57.773276][ T25] ? lock_acquire+0x442/0x510 [ 57.777946][ T25] ? read_word_at_a_time+0xe/0x20 [ 57.782967][ T25] ? strscpy+0xa1/0x2b0 [ 57.788259][ T25] process_one_work+0x98d/0x1630 [ 57.794090][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 57.800865][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 57.807302][ T25] worker_thread+0x658/0x11f0 [ 57.812087][ T25] ? process_one_work+0x1630/0x1630 [ 57.817269][ T25] kthread+0x3e5/0x4d0 [ 57.821333][ T25] ? set_kthread_struct+0x130/0x130 [ 57.826512][ T25] ret_from_fork+0x1f/0x30 [ 57.830914][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 57.837483][ T25] CPU: 1 PID: 25 Comm: kworker/u4:1 Tainted: G W 5.13.0-syzkaller #0 [ 57.846965][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.857008][ T25] Workqueue: qrtr_ns_handler qrtr_ns_worker [ 57.862894][ T25] Call Trace: [ 57.866159][ T25] dump_stack_lvl+0xcd/0x134 [ 57.870735][ T25] panic+0x306/0x73d [ 57.874626][ T25] ? __warn_printk+0xf3/0xf3 [ 57.879200][ T25] ? __warn.cold+0x1a/0x44 [ 57.883608][ T25] ? refcount_warn_saturate+0x169/0x1e0 [ 57.889243][ T25] __warn.cold+0x35/0x44 [ 57.893482][ T25] ? refcount_warn_saturate+0x169/0x1e0 [ 57.899025][ T25] report_bug+0x1bd/0x210 [ 57.903352][ T25] handle_bug+0x3c/0x60 [ 57.907490][ T25] exc_invalid_op+0x14/0x40 [ 57.911987][ T25] asm_exc_invalid_op+0x12/0x20 [ 57.916823][ T25] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 57.922962][ T25] Code: 0a 31 ff 89 de e8 47 73 a2 fd 84 db 0f 85 36 ff ff ff e8 fa 6c a2 fd 48 c7 c7 a0 2d e3 89 c6 05 02 b5 03 0a 01 e8 24 1a 0c 05 <0f> 0b e9 17 ff ff ff e8 db 6c a2 fd 0f b6 1d e7 b4 03 0a 31 ff 89 [ 57.942661][ T25] RSP: 0018:ffffc90000dffa00 EFLAGS: 00010082 [ 57.948922][ T25] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 57.956872][ T25] RDX: ffff888015da1c40 RSI: ffffffff815d7235 RDI: fffff520001bff32 [ 57.964924][ T25] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 57.972892][ T25] R10: ffffffff815d109e R11: 0000000000000000 R12: ffff8881441d0000 [ 57.980846][ T25] R13: ffff888021ffa800 R14: ffff888035bb8df0 R15: ffff888035bb8df4 [ 57.988807][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 57.993994][ T25] ? vprintk+0x95/0x260 [ 57.998131][ T25] qrtr_recvmsg+0x85a/0x990 [ 58.002655][ T25] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 58.007968][ T25] ? lock_release+0x522/0x720 [ 58.012629][ T25] ? lock_downgrade+0x6e0/0x6e0 [ 58.017478][ T25] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 58.023738][ T25] ? security_socket_recvmsg+0x8f/0xc0 [ 58.029196][ T25] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 58.034463][ T25] kernel_recvmsg+0x110/0x160 [ 58.039122][ T25] qrtr_ns_worker+0x15a/0x1710 [ 58.043868][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.048799][ T25] ? ctrl_cmd_bye+0xc20/0xc20 [ 58.053457][ T25] ? do_raw_spin_unlock+0x171/0x230 [ 58.058649][ T25] ? lock_acquire+0x442/0x510 [ 58.063307][ T25] ? read_word_at_a_time+0xe/0x20 [ 58.068314][ T25] ? strscpy+0xa1/0x2b0 [ 58.072451][ T25] process_one_work+0x98d/0x1630 [ 58.077389][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 58.082744][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.087661][ T25] worker_thread+0x658/0x11f0 [ 58.092320][ T25] ? process_one_work+0x1630/0x1630 [ 58.097516][ T25] kthread+0x3e5/0x4d0 [ 58.101566][ T25] ? set_kthread_struct+0x130/0x130 [ 58.106757][ T25] ret_from_fork+0x1f/0x30 [ 59.170211][ T25] Shutting down cpus with NMI [ 59.175865][ T25] Kernel Offset: disabled [ 59.180282][ T25] Rebooting in 86400 seconds..