Warning: Permanently added '10.128.0.192' (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 [ 537.232700] audit: type=1400 audit(1596688682.812:8): avc: denied { execmem } for pid=6363 comm="syz-executor282" 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 [ 537.276983] ================================================================== [ 537.284606] BUG: KASAN: use-after-free in ex_handler_refcount+0x164/0x1a0 [ 537.291530] Write of size 4 at addr ffff8880861263d8 by task kworker/0:1/24 [ 537.298693] [ 537.300304] CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.192-syzkaller #0 [ 537.307641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 537.317041] Workqueue: events do_enable_set [ 537.321343] Call Trace: [ 537.323946] dump_stack+0x1b2/0x283 [ 537.327651] print_address_description.cold+0x54/0x1d3 [ 537.332925] kasan_report_error.cold+0x8a/0x194 [ 537.337590] ? ex_handler_refcount+0x164/0x1a0 [ 537.342151] __asan_report_store4_noabort+0x68/0x70 [ 537.347154] ? ex_handler_refcount+0x164/0x1a0 [ 537.351715] ex_handler_refcount+0x164/0x1a0 [ 537.356101] ? ex_handler_clear_fs+0xb0/0xb0 [ 537.360505] fixup_exception+0x8a/0xc3 [ 537.364371] do_trap+0x61/0x250 [ 537.367635] do_error_trap+0x132/0x2d0 [ 537.371505] ? math_error+0x2d0/0x2d0 [ 537.375363] ? inat_get_avx_attribute+0x52f2/0x6a9a [ 537.380404] ? __lock_acquire+0x5fc/0x3f20 [ 537.384621] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 537.389465] invalid_op+0x1b/0x40 [ 537.392986] RIP: 0010:inat_get_avx_attribute+0x52f2/0x6a9a [ 537.398583] RSP: 0018:ffff8880a9a77c88 EFLAGS: 00010297 [ 537.403926] RAX: ffff8880a9a5e640 RBX: 0000000000000001 RCX: ffff8880861263d8 [ 537.411174] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880861263c0 [ 537.418421] RBP: ffff8880861263c0 R08: ffffffff8a091b20 R09: 000000000004058b [ 537.425667] R10: ffff8880a9a5eef0 R11: ffff8880a9a5e640 R12: ffff888096dd2990 [ 537.432915] R13: ffff8880a996b800 R14: ffff8880aea2ad00 R15: ffff888096dd2980 [ 537.440244] ? l2cap_chan_put+0x10/0x1b0 [ 537.444289] do_enable_set+0x47f/0x8a0 [ 537.448157] ? lock_acquire+0x170/0x3f0 [ 537.452108] ? chan_recv_cb+0x970/0x970 [ 537.456109] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 537.461565] process_one_work+0x793/0x14a0 [ 537.465785] ? work_busy+0x320/0x320 [ 537.469475] ? worker_thread+0x158/0xff0 [ 537.473516] ? _raw_spin_unlock_irq+0x24/0x80 [ 537.477990] worker_thread+0x5cc/0xff0 [ 537.481860] ? rescuer_thread+0xc80/0xc80 [ 537.486025] kthread+0x30d/0x420 [ 537.489369] ? kthread_create_on_node+0xd0/0xd0 [ 537.494016] ret_from_fork+0x24/0x30 [ 537.497713] [ 537.499319] Allocated by task 24: [ 537.502760] kasan_kmalloc+0xeb/0x160 [ 537.506569] kmem_cache_alloc_trace+0x131/0x3d0 [ 537.512438] l2cap_chan_create+0x3e/0x3c0 [ 537.516563] do_enable_set+0x4ac/0x8a0 [ 537.520431] process_one_work+0x793/0x14a0 [ 537.524644] worker_thread+0x5cc/0xff0 [ 537.528565] kthread+0x30d/0x420 [ 537.531909] ret_from_fork+0x24/0x30 [ 537.535598] [ 537.537202] Freed by task 3654: [ 537.540461] kasan_slab_free+0xc3/0x1a0 [ 537.544425] kfree+0xc9/0x250 [ 537.547523] l2cap_chan_put+0x152/0x1b0 [ 537.551476] do_enable_set+0x47f/0x8a0 [ 537.555377] process_one_work+0x793/0x14a0 [ 537.559612] worker_thread+0x5cc/0xff0 [ 537.563477] kthread+0x30d/0x420 [ 537.566820] ret_from_fork+0x24/0x30 [ 537.570542] [ 537.572149] The buggy address belongs to the object at ffff8880861263c0 [ 537.572149] which belongs to the cache kmalloc-2048 of size 2048 [ 537.584953] The buggy address is located 24 bytes inside of [ 537.584953] 2048-byte region [ffff8880861263c0, ffff888086126bc0) [ 537.596815] The buggy address belongs to the page: [ 537.601721] page:ffffea0002184980 count:1 mapcount:0 mapping:ffff8880861263c0 index:0x0 compound_mapcount: 0 [ 537.611665] flags: 0xfffe0000008100(slab|head) [ 537.616241] raw: 00fffe0000008100 ffff8880861263c0 0000000000000000 0000000100000003 [ 537.624099] raw: ffffea00025dc1a0 ffffea00025cc8a0 ffff88812fe52c40 0000000000000000 [ 537.631966] page dumped because: kasan: bad access detected [ 537.637650] [ 537.639254] Memory state around the buggy address: [ 537.644158] ffff888086126280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 537.651505] ffff888086126300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 537.658849] >ffff888086126380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 537.666188] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 537.672405] ffff888086126400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 537.679752] ffff888086126480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 537.687086] ================================================================== [ 537.694420] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 537.892051] Kernel panic - not syncing: panic_on_warn set ... [ 537.892051] [ 537.899450] CPU: 0 PID: 24 Comm: kworker/0:1 Tainted: G B 4.14.192-syzkaller #0 [ 537.908022] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 537.917384] Workqueue: events do_enable_set [ 537.921701] Call Trace: [ 537.924291] dump_stack+0x1b2/0x283 [ 537.927980] panic+0x1f9/0x42d [ 537.931175] ? add_taint.cold+0x16/0x16 [ 537.935150] ? ___preempt_schedule+0x16/0x18 [ 537.939562] kasan_end_report+0x43/0x49 [ 537.943533] kasan_report_error.cold+0xa7/0x194 [ 537.948198] ? ex_handler_refcount+0x164/0x1a0 [ 537.952773] __asan_report_store4_noabort+0x68/0x70 [ 537.957874] ? ex_handler_refcount+0x164/0x1a0 [ 537.962489] ex_handler_refcount+0x164/0x1a0 [ 537.966895] ? ex_handler_clear_fs+0xb0/0xb0 [ 537.971299] fixup_exception+0x8a/0xc3 [ 537.975182] do_trap+0x61/0x250 [ 537.978458] do_error_trap+0x132/0x2d0 [ 537.982342] ? math_error+0x2d0/0x2d0 [ 537.986140] ? inat_get_avx_attribute+0x52f2/0x6a9a [ 537.991150] ? __lock_acquire+0x5fc/0x3f20 [ 537.995382] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 538.000222] invalid_op+0x1b/0x40 [ 538.003672] RIP: 0010:inat_get_avx_attribute+0x52f2/0x6a9a [ 538.009285] RSP: 0018:ffff8880a9a77c88 EFLAGS: 00010297 [ 538.014642] RAX: ffff8880a9a5e640 RBX: 0000000000000001 RCX: ffff8880861263d8 [ 538.021907] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880861263c0 [ 538.029171] RBP: ffff8880861263c0 R08: ffffffff8a091b20 R09: 000000000004058b [ 538.036437] R10: ffff8880a9a5eef0 R11: ffff8880a9a5e640 R12: ffff888096dd2990 [ 538.043701] R13: ffff8880a996b800 R14: ffff8880aea2ad00 R15: ffff888096dd2980 [ 538.050980] ? l2cap_chan_put+0x10/0x1b0 [ 538.055046] do_enable_set+0x47f/0x8a0 [ 538.058934] ? lock_acquire+0x170/0x3f0 [ 538.062902] ? chan_recv_cb+0x970/0x970 [ 538.066872] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 538.072321] process_one_work+0x793/0x14a0 [ 538.076552] ? work_busy+0x320/0x320 [ 538.080265] ? worker_thread+0x158/0xff0 [ 538.084325] ? _raw_spin_unlock_irq+0x24/0x80 [ 538.088825] worker_thread+0x5cc/0xff0 [ 538.092712] ? rescuer_thread+0xc80/0xc80 [ 538.096854] kthread+0x30d/0x420 [ 538.100216] ? kthread_create_on_node+0xd0/0xd0 [ 538.104882] ret_from_fork+0x24/0x30 [ 538.110350] Kernel Offset: disabled [ 538.113961] Rebooting in 86400 seconds..