[ 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 '10.128.15.194' (ECDSA) to the list of known hosts. syzkaller login: [ 76.928240][ T8512] IPVS: ftp: loaded support on port[0] = 21 [ 76.929014][ T8510] IPVS: ftp: loaded support on port[0] = 21 [ 76.941315][ T8514] IPVS: ftp: loaded support on port[0] = 21 [ 76.945537][ T8507] IPVS: ftp: loaded support on port[0] = 21 [ 76.953038][ T8511] IPVS: ftp: loaded support on port[0] = 21 [ 76.955961][ T8513] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 116.449936][T24379] ================================================================== [ 116.458064][T24379] BUG: KASAN: use-after-free in lockdep_register_key+0x356/0x3e0 [ 116.465779][T24379] Read of size 8 at addr ffff888031a66ad8 by task syz-executor193/24379 [ 116.474080][T24379] [ 116.476402][T24379] CPU: 1 PID: 24379 Comm: syz-executor193 Not tainted 5.9.0-syzkaller #0 [ 116.484795][T24379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.494837][T24379] Call Trace: [ 116.498115][T24379] dump_stack+0x107/0x163 [ 116.502446][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.507808][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.513168][T24379] print_address_description.constprop.0.cold+0xae/0x4c8 [ 116.520181][T24379] ? get_random_u32+0x103/0x200 [ 116.525023][T24379] ? vprintk_func+0x95/0x1e0 [ 116.529604][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.534965][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.540329][T24379] kasan_report.cold+0x1f/0x37 [ 116.545101][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.550486][T24379] lockdep_register_key+0x356/0x3e0 [ 116.555677][T24379] htab_map_alloc+0x6c5/0x14a0 [ 116.560438][T24379] ? htab_map_alloc_check+0x305/0x450 [ 116.565797][T24379] ? htab_lru_percpu_map_lookup_batch+0x40/0x40 [ 116.572032][T24379] __do_sys_bpf+0xa80/0x5180 [ 116.576609][T24379] ? bpf_link_get_from_fd+0x110/0x110 [ 116.581948][T24379] ? __up_read+0x1a1/0x7b0 [ 116.586335][T24379] ? _down_write_nest_lock+0x150/0x150 [ 116.591767][T24379] ? syscall_enter_from_user_mode+0x1d/0x50 [ 116.597629][T24379] do_syscall_64+0x2d/0x70 [ 116.602023][T24379] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.607882][T24379] RIP: 0033:0x446a19 [ 116.611746][T24379] Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 116.631313][T24379] RSP: 002b:00007f9d5a1b1db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 116.639720][T24379] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446a19 [ 116.647660][T24379] RDX: 0000000000000040 RSI: 0000000020000280 RDI: 0000000000000000 [ 116.655613][T24379] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 116.663566][T24379] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 116.671504][T24379] R13: 00007ffd05ff7c6f R14: 00007f9d5a1b29c0 R15: 0000000000000000 [ 116.679444][T24379] [ 116.681740][T24379] Allocated by task 17718: [ 116.686122][T24379] kasan_save_stack+0x1b/0x40 [ 116.690766][T24379] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 116.696361][T24379] htab_map_alloc+0xdf/0x14a0 [ 116.701002][T24379] __do_sys_bpf+0xa80/0x5180 [ 116.705556][T24379] do_syscall_64+0x2d/0x70 [ 116.709948][T24379] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.715801][T24379] [ 116.718099][T24379] Freed by task 17718: [ 116.722146][T24379] kasan_save_stack+0x1b/0x40 [ 116.726791][T24379] kasan_set_track+0x1c/0x30 [ 116.731345][T24379] kasan_set_free_info+0x1b/0x30 [ 116.736261][T24379] __kasan_slab_free+0x102/0x140 [ 116.741164][T24379] slab_free_freelist_hook+0x5d/0x150 [ 116.746523][T24379] kfree+0xdb/0x360 [ 116.750296][T24379] htab_map_alloc+0x3f9/0x14a0 [ 116.755025][T24379] __do_sys_bpf+0xa80/0x5180 [ 116.759596][T24379] do_syscall_64+0x2d/0x70 [ 116.763996][T24379] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.769852][T24379] [ 116.772149][T24379] The buggy address belongs to the object at ffff888031a66800 [ 116.772149][T24379] which belongs to the cache kmalloc-1k of size 1024 [ 116.786179][T24379] The buggy address is located 728 bytes inside of [ 116.786179][T24379] 1024-byte region [ffff888031a66800, ffff888031a66c00) [ 116.799498][T24379] The buggy address belongs to the page: [ 116.805105][T24379] page:000000002ce979ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x31a60 [ 116.815217][T24379] head:000000002ce979ea order:3 compound_mapcount:0 compound_pincount:0 [ 116.823504][T24379] flags: 0xfff00000010200(slab|head) [ 116.828758][T24379] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010041140 [ 116.837308][T24379] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 116.845853][T24379] page dumped because: kasan: bad access detected [ 116.852226][T24379] [ 116.854522][T24379] Memory state around the buggy address: [ 116.860121][T24379] ffff888031a66980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 116.868150][T24379] ffff888031a66a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 116.876197][T24379] >ffff888031a66a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 116.884223][T24379] ^ [ 116.891140][T24379] ffff888031a66b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 116.899170][T24379] ffff888031a66b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 116.907208][T24379] ================================================================== [ 116.915252][T24379] Disabling lock debugging due to kernel taint [ 116.921386][T24379] Kernel panic - not syncing: panic_on_warn set ... [ 116.927951][T24379] CPU: 1 PID: 24379 Comm: syz-executor193 Tainted: G B 5.9.0-syzkaller #0 [ 116.937710][T24379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.947816][T24379] Call Trace: [ 116.951076][T24379] dump_stack+0x107/0x163 [ 116.955389][T24379] ? lockdep_register_key+0x270/0x3e0 [ 116.960758][T24379] panic+0x306/0x73d [ 116.964620][T24379] ? __warn_printk+0xf3/0xf3 [ 116.969180][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.974519][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.979862][T24379] end_report+0x58/0x5e [ 116.984020][T24379] kasan_report.cold+0xd/0x37 [ 116.988664][T24379] ? lockdep_register_key+0x356/0x3e0 [ 116.994036][T24379] lockdep_register_key+0x356/0x3e0 [ 116.999206][T24379] htab_map_alloc+0x6c5/0x14a0 [ 117.003979][T24379] ? htab_map_alloc_check+0x305/0x450 [ 117.009326][T24379] ? htab_lru_percpu_map_lookup_batch+0x40/0x40 [ 117.015753][T24379] __do_sys_bpf+0xa80/0x5180 [ 117.020308][T24379] ? bpf_link_get_from_fd+0x110/0x110 [ 117.025645][T24379] ? __up_read+0x1a1/0x7b0 [ 117.030028][T24379] ? _down_write_nest_lock+0x150/0x150 [ 117.035560][T24379] ? syscall_enter_from_user_mode+0x1d/0x50 [ 117.041428][T24379] do_syscall_64+0x2d/0x70 [ 117.045833][T24379] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 117.051694][T24379] RIP: 0033:0x446a19 [ 117.055554][T24379] Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 117.075125][T24379] RSP: 002b:00007f9d5a1b1db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 117.083517][T24379] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446a19 [ 117.091455][T24379] RDX: 0000000000000040 RSI: 0000000020000280 RDI: 0000000000000000 [ 117.099391][T24379] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 117.107336][T24379] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 117.115280][T24379] R13: 00007ffd05ff7c6f R14: 00007f9d5a1b29c0 R15: 0000000000000000 [ 118.239150][T24379] Shutting down cpus with NMI [ 118.244367][T24379] Kernel Offset: disabled [ 118.248672][T24379] Rebooting in 86400 seconds..