Warning: Permanently added '10.128.1.114' (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 syzkaller login: [ 72.195880][ T137] ------------[ cut here ]------------ [ 72.201557][ T137] refcount_t: addition on 0; use-after-free. [ 72.207748][ T137] WARNING: CPU: 1 PID: 137 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 [ 72.217057][ T137] Modules linked in: [ 72.220946][ T137] CPU: 1 PID: 137 Comm: kworker/u4:3 Not tainted 5.13.0-syzkaller #0 [ 72.228998][ T137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.239176][ T137] Workqueue: qrtr_ns_handler qrtr_ns_worker [ 72.245110][ T137] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 72.251253][ T137] Code: 0a 31 ff 89 de e8 17 63 a2 fd 84 db 0f 85 36 ff ff ff e8 ca 5c a2 fd 48 c7 c7 a0 2e e3 89 c6 05 a2 b6 03 0a 01 e8 44 74 0c 05 <0f> 0b e9 17 ff ff ff e8 ab 5c a2 fd 0f b6 1d 87 b6 03 0a 31 ff 89 [ 72.270982][ T137] RSP: 0018:ffffc9000113fa00 EFLAGS: 00010082 [ 72.277072][ T137] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 72.285026][ T137] RDX: ffff888014ff1c40 RSI: ffffffff815d7275 RDI: fffff52000227f32 [ 72.292993][ T137] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 72.300953][ T137] R10: ffffffff815d10de R11: 0000000000000000 R12: ffff888143bf0000 [ 72.308906][ T137] R13: ffff888018054c00 R14: ffff888026eb23f0 R15: ffff888026eb23f4 [ 72.316857][ T137] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 72.325781][ T137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.332362][ T137] CR2: 0000564e3c8d9d90 CR3: 000000001d13c000 CR4: 00000000001506e0 [ 72.340353][ T137] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.348318][ T137] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.356274][ T137] Call Trace: [ 72.359541][ T137] qrtr_recvmsg+0x85a/0x990 [ 72.364038][ T137] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 72.369328][ T137] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.375552][ T137] ? security_socket_recvmsg+0x8f/0xc0 [ 72.380995][ T137] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 72.386264][ T137] kernel_recvmsg+0x110/0x160 [ 72.390935][ T137] qrtr_ns_worker+0x15a/0x1710 [ 72.395686][ T137] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 72.401665][ T137] ? ctrl_cmd_bye+0xc20/0xc20 [ 72.406344][ T137] process_one_work+0x98d/0x1630 [ 72.411273][ T137] ? pwq_dec_nr_in_flight+0x320/0x320 [ 72.416631][ T137] ? rwlock_bug.part.0+0x90/0x90 [ 72.421549][ T137] ? _raw_spin_lock_irq+0x41/0x50 [ 72.426565][ T137] worker_thread+0x658/0x11f0 [ 72.431250][ T137] ? process_one_work+0x1630/0x1630 [ 72.436450][ T137] kthread+0x3e5/0x4d0 [ 72.440518][ T137] ? set_kthread_struct+0x130/0x130 [ 72.445699][ T137] ret_from_fork+0x1f/0x30 [ 72.450144][ T137] Kernel panic - not syncing: panic_on_warn set ... [ 72.456706][ T137] CPU: 1 PID: 137 Comm: kworker/u4:3 Not tainted 5.13.0-syzkaller #0 [ 72.464778][ T137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.474832][ T137] Workqueue: qrtr_ns_handler qrtr_ns_worker [ 72.480714][ T137] Call Trace: [ 72.484001][ T137] dump_stack_lvl+0xcd/0x134 [ 72.488607][ T137] panic+0x306/0x73d [ 72.492487][ T137] ? __warn_printk+0xf3/0xf3 [ 72.497066][ T137] ? __warn.cold+0x1a/0x44 [ 72.501467][ T137] ? refcount_warn_saturate+0x169/0x1e0 [ 72.506995][ T137] __warn.cold+0x35/0x44 [ 72.511222][ T137] ? refcount_warn_saturate+0x169/0x1e0 [ 72.516747][ T137] report_bug+0x1bd/0x210 [ 72.521066][ T137] handle_bug+0x3c/0x60 [ 72.525226][ T137] exc_invalid_op+0x14/0x40 [ 72.529733][ T137] asm_exc_invalid_op+0x12/0x20 [ 72.534576][ T137] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 72.540764][ T137] Code: 0a 31 ff 89 de e8 17 63 a2 fd 84 db 0f 85 36 ff ff ff e8 ca 5c a2 fd 48 c7 c7 a0 2e e3 89 c6 05 a2 b6 03 0a 01 e8 44 74 0c 05 <0f> 0b e9 17 ff ff ff e8 ab 5c a2 fd 0f b6 1d 87 b6 03 0a 31 ff 89 [ 72.560375][ T137] RSP: 0018:ffffc9000113fa00 EFLAGS: 00010082 [ 72.566437][ T137] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 72.574401][ T137] RDX: ffff888014ff1c40 RSI: ffffffff815d7275 RDI: fffff52000227f32 [ 72.582356][ T137] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 72.590308][ T137] R10: ffffffff815d10de R11: 0000000000000000 R12: ffff888143bf0000 [ 72.598259][ T137] R13: ffff888018054c00 R14: ffff888026eb23f0 R15: ffff888026eb23f4 [ 72.606219][ T137] ? wake_up_klogd.part.0+0x8e/0xd0 [ 72.611429][ T137] ? vprintk+0x95/0x260 [ 72.615585][ T137] qrtr_recvmsg+0x85a/0x990 [ 72.620075][ T137] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 72.625349][ T137] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.631574][ T137] ? security_socket_recvmsg+0x8f/0xc0 [ 72.637017][ T137] ? qrtr_node_enqueue+0x12d0/0x12d0 [ 72.642298][ T137] kernel_recvmsg+0x110/0x160 [ 72.646969][ T137] qrtr_ns_worker+0x15a/0x1710 [ 72.651718][ T137] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 72.657681][ T137] ? ctrl_cmd_bye+0xc20/0xc20 [ 72.662360][ T137] process_one_work+0x98d/0x1630 [ 72.667293][ T137] ? pwq_dec_nr_in_flight+0x320/0x320 [ 72.672649][ T137] ? rwlock_bug.part.0+0x90/0x90 [ 72.677566][ T137] ? _raw_spin_lock_irq+0x41/0x50 [ 72.682577][ T137] worker_thread+0x658/0x11f0 [ 72.687244][ T137] ? process_one_work+0x1630/0x1630 [ 72.692425][ T137] kthread+0x3e5/0x4d0 [ 72.696474][ T137] ? set_kthread_struct+0x130/0x130 [ 72.701655][ T137] ret_from_fork+0x1f/0x30 [ 73.802493][ T137] Shutting down cpus with NMI [ 73.809220][ T137] Kernel Offset: disabled [ 73.813761][ T137] Rebooting in 86400 seconds..