Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts.
2021/11/26 05:42:51 fuzzer started
2021/11/26 05:42:51 connecting to host at 10.128.0.169:34375
2021/11/26 05:42:51 checking machine...
2021/11/26 05:42:51 checking revisions...
2021/11/26 05:42:52 testing simple program...
syzkaller login: [ 71.524491][ T6565] cgroup: Unknown subsys name 'net'
[ 71.530888][ T6565]
[ 71.533211][ T6565] =========================
[ 71.537688][ T6565] WARNING: held lock freed!
[ 71.542403][ T6565] 5.16.0-rc2-next-20211126-syzkaller #0 Not tainted
[ 71.549001][ T6565] -------------------------
[ 71.553490][ T6565] syz-executor/6565 is freeing memory ffff88802237ac00-ffff88802237adff, with a lock still held there!
[ 71.564985][ T6565] ffff88802237ad48 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 71.574986][ T6565] 2 locks held by syz-executor/6565:
[ 71.580345][ T6565] #0: ffffffff8bbc5d48 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock_and_drain_offline+0xa5/0x900
[ 71.591088][ T6565] #1: ffff88802237ad48 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 71.601298][ T6565]
[ 71.601298][ T6565] stack backtrace:
[ 71.607183][ T6565] CPU: 1 PID: 6565 Comm: syz-executor Not tainted 5.16.0-rc2-next-20211126-syzkaller #0
[ 71.616901][ T6565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 71.627303][ T6565] Call Trace:
[ 71.630583][ T6565]
[ 71.633512][ T6565] dump_stack_lvl+0xcd/0x134
[ 71.638236][ T6565] debug_check_no_locks_freed.cold+0x9d/0xa9
[ 71.644326][ T6565] ? lockdep_hardirqs_on+0x79/0x100
[ 71.649568][ T6565] slab_free_freelist_hook+0x73/0x1c0
[ 71.654953][ T6565] ? kernfs_put.part.0+0x331/0x540
[ 71.660061][ T6565] kfree+0xe0/0x430
[ 71.664103][ T6565] ? kmem_cache_free+0xba/0x4a0
[ 71.668962][ T6565] ? rwlock_bug.part.0+0x90/0x90
[ 71.674020][ T6565] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[ 71.680605][ T6565] kernfs_put.part.0+0x331/0x540
[ 71.685660][ T6565] kernfs_put+0x42/0x50
[ 71.690021][ T6565] __kernfs_remove+0x7a3/0xb20
[ 71.694784][ T6565] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 71.700841][ T6565] ? down_write+0xde/0x150
[ 71.705270][ T6565] ? down_write_killable_nested+0x180/0x180
[ 71.711459][ T6565] kernfs_destroy_root+0x89/0xb0
[ 71.716426][ T6565] cgroup_setup_root+0x3a6/0xad0
[ 71.721389][ T6565] ? rebind_subsystems+0x10e0/0x10e0
[ 71.726781][ T6565] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 71.733038][ T6565] cgroup1_get_tree+0xd33/0x1390
[ 71.737995][ T6565] vfs_get_tree+0x89/0x2f0
[ 71.742456][ T6565] path_mount+0x1320/0x1fa0
[ 71.746975][ T6565] ? kmem_cache_free+0xba/0x4a0
[ 71.751870][ T6565] ? finish_automount+0xaf0/0xaf0
[ 71.756967][ T6565] ? putname+0xfe/0x140
[ 71.761358][ T6565] __x64_sys_mount+0x27f/0x300
[ 71.766120][ T6565] ? copy_mnt_ns+0xae0/0xae0
[ 71.771251][ T6565] ? syscall_enter_from_user_mode+0x21/0x70
[ 71.777157][ T6565] do_syscall_64+0x35/0xb0
[ 71.781575][ T6565] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 71.787496][ T6565] RIP: 0033:0x7fa354dff01a
[ 71.792659][ T6565] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 71.812450][ T6565] RSP: 002b:00007fff4948c888 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 71.820906][ T6565] RAX: ffffffffffffffda RBX: 00007fff4948ca18 RCX: 00007fa354dff01a
[ 71.829016][ T6565] RDX: 00007fa354e61fd6 RSI: 00007fa354e5829a RDI: 00007fa354e56d71
[ 71.837012][ T6565] RBP: 00007fa354e5829a R08: 00007fa354e583f7 R09: 0000000000000026
[ 71.844979][ T6565] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff4948c890
[ 71.852945][ T6565] R13: 00007fff4948ca38 R14: 00007fff4948c960 R15: 00007fa354e583f1
[ 71.860913][ T6565]
[ 71.870490][ T6565] ==================================================================
[ 71.878771][ T6565] BUG: KASAN: use-after-free in up_write+0x3ac/0x470
[ 71.885460][ T6565] Read of size 8 at addr ffff88802237ad40 by task syz-executor/6565
[ 71.893433][ T6565]
[ 71.895755][ T6565] CPU: 1 PID: 6565 Comm: syz-executor Not tainted 5.16.0-rc2-next-20211126-syzkaller #0
[ 71.905675][ T6565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 71.915767][ T6565] Call Trace:
[ 71.919041][ T6565]
[ 71.921986][ T6565] dump_stack_lvl+0xcd/0x134
[ 71.926581][ T6565] print_address_description.constprop.0.cold+0xa5/0x3ed
[ 71.933733][ T6565] ? up_write+0x3ac/0x470
[ 71.938171][ T6565] ? up_write+0x3ac/0x470
[ 71.942690][ T6565] kasan_report.cold+0x83/0xdf
[ 71.947452][ T6565] ? up_write+0x3ac/0x470
[ 71.952038][ T6565] up_write+0x3ac/0x470
[ 71.956189][ T6565] cgroup_setup_root+0x3a6/0xad0
[ 71.961220][ T6565] ? rebind_subsystems+0x10e0/0x10e0
[ 71.966506][ T6565] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 71.972836][ T6565] cgroup1_get_tree+0xd33/0x1390
[ 71.977780][ T6565] vfs_get_tree+0x89/0x2f0
[ 71.982197][ T6565] path_mount+0x1320/0x1fa0
[ 71.986701][ T6565] ? kmem_cache_free+0xba/0x4a0
[ 71.991551][ T6565] ? finish_automount+0xaf0/0xaf0
[ 71.996571][ T6565] ? putname+0xfe/0x140
[ 72.000744][ T6565] __x64_sys_mount+0x27f/0x300
[ 72.005523][ T6565] ? copy_mnt_ns+0xae0/0xae0
[ 72.010116][ T6565] ? syscall_enter_from_user_mode+0x21/0x70
[ 72.016026][ T6565] do_syscall_64+0x35/0xb0
[ 72.020443][ T6565] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 72.026337][ T6565] RIP: 0033:0x7fa354dff01a
[ 72.030745][ T6565] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 72.050583][ T6565] RSP: 002b:00007fff4948c888 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 72.059078][ T6565] RAX: ffffffffffffffda RBX: 00007fff4948ca18 RCX: 00007fa354dff01a
[ 72.067048][ T6565] RDX: 00007fa354e61fd6 RSI: 00007fa354e5829a RDI: 00007fa354e56d71
[ 72.076838][ T6565] RBP: 00007fa354e5829a R08: 00007fa354e583f7 R09: 0000000000000026
[ 72.085046][ T6565] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff4948c890
[ 72.093014][ T6565] R13: 00007fff4948ca38 R14: 00007fff4948c960 R15: 00007fa354e583f1
[ 72.101104][ T6565]
[ 72.104162][ T6565]
[ 72.106475][ T6565] Allocated by task 6565:
[ 72.110797][ T6565] kasan_save_stack+0x1e/0x50
[ 72.115477][ T6565] __kasan_kmalloc+0xa9/0xd0
[ 72.120059][ T6565] kernfs_create_root+0x4c/0x410
[ 72.125200][ T6565] cgroup_setup_root+0x243/0xad0
[ 72.130139][ T6565] cgroup1_get_tree+0xd33/0x1390
[ 72.135080][ T6565] vfs_get_tree+0x89/0x2f0
[ 72.139507][ T6565] path_mount+0x1320/0x1fa0
[ 72.144100][ T6565] __x64_sys_mount+0x27f/0x300
[ 72.148918][ T6565] do_syscall_64+0x35/0xb0
[ 72.153337][ T6565] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 72.159234][ T6565]
[ 72.161574][ T6565] Freed by task 6565:
[ 72.165549][ T6565] kasan_save_stack+0x1e/0x50
[ 72.170229][ T6565] kasan_set_track+0x21/0x30
[ 72.174877][ T6565] kasan_set_free_info+0x20/0x30
[ 72.179828][ T6565] __kasan_slab_free+0x103/0x170
[ 72.184794][ T6565] slab_free_freelist_hook+0x8b/0x1c0
[ 72.190152][ T6565] kfree+0xe0/0x430
[ 72.193950][ T6565] kernfs_put.part.0+0x331/0x540
[ 72.198886][ T6565] kernfs_put+0x42/0x50
[ 72.203044][ T6565] __kernfs_remove+0x7a3/0xb20
[ 72.207883][ T6565] kernfs_destroy_root+0x89/0xb0
[ 72.212808][ T6565] cgroup_setup_root+0x3a6/0xad0
[ 72.217924][ T6565] cgroup1_get_tree+0xd33/0x1390
[ 72.222952][ T6565] vfs_get_tree+0x89/0x2f0
[ 72.227378][ T6565] path_mount+0x1320/0x1fa0
[ 72.231965][ T6565] __x64_sys_mount+0x27f/0x300
[ 72.236820][ T6565] do_syscall_64+0x35/0xb0
[ 72.241321][ T6565] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 72.247340][ T6565]
[ 72.249792][ T6565] The buggy address belongs to the object at ffff88802237ac00
[ 72.249792][ T6565] which belongs to the cache kmalloc-512 of size 512
[ 72.263832][ T6565] The buggy address is located 320 bytes inside of
[ 72.263832][ T6565] 512-byte region [ffff88802237ac00, ffff88802237ae00)
[ 72.277334][ T6565] The buggy address belongs to the page:
[ 72.283087][ T6565] page:ffffea000088de00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22378
[ 72.293228][ T6565] head:ffffea000088de00 order:2 compound_mapcount:0 compound_pincount:0
[ 72.301735][ T6565] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
[ 72.309716][ T6565] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010c41c80
[ 72.318488][ T6565] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 72.327338][ T6565] page dumped because: kasan: bad access detected
[ 72.334049][ T6565] page_owner tracks the page as allocated
[ 72.339779][ T6565] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 15151271332, free_ts 0
[ 72.357850][ T6565] get_page_from_freelist+0xa72/0x2f40
[ 72.363395][ T6565] __alloc_pages+0x1b2/0x500
[ 72.367990][ T6565] alloc_page_interleave+0x1e/0x200
[ 72.373199][ T6565] alloc_pages+0x29f/0x300
[ 72.377604][ T6565] new_slab+0x261/0x460
[ 72.381968][ T6565] ___slab_alloc+0x798/0xf30
[ 72.386546][ T6565] __slab_alloc.constprop.0+0x4d/0xa0
[ 72.391906][ T6565] kmem_cache_alloc_trace+0x289/0x2c0
[ 72.397545][ T6565] device_add+0x11a7/0x1ee0
[ 72.402145][ T6565] netdev_register_kobject+0x181/0x430
[ 72.407603][ T6565] register_netdevice+0xd31/0x1500
[ 72.412885][ T6565] register_netdev+0x2d/0x50
[ 72.417632][ T6565] nr_proto_init+0x27f/0x6ad
[ 72.422225][ T6565] do_one_initcall+0x103/0x650
[ 72.427020][ T6565] kernel_init_freeable+0x6b1/0x73a
[ 72.432380][ T6565] kernel_init+0x1a/0x1d0
[ 72.436806][ T6565] page_owner free stack trace missing
[ 72.442336][ T6565]
[ 72.444651][ T6565] Memory state around the buggy address:
[ 72.450609][ T6565] ffff88802237ac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 72.458954][ T6565] ffff88802237ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 72.467265][ T6565] >ffff88802237ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 72.475316][ T6565] ^
[ 72.481672][ T6565] ffff88802237ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 72.489830][ T6565] ffff88802237ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 72.497979][ T6565] ==================================================================
[ 72.511427][ T6565] Kernel panic - not syncing: panic_on_warn set ...
[ 72.518037][ T6565] CPU: 1 PID: 6565 Comm: syz-executor Tainted: G B 5.16.0-rc2-next-20211126-syzkaller #0
[ 72.529275][ T6565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 72.539340][ T6565] Call Trace:
[ 72.542812][ T6565]
[ 72.545774][ T6565] dump_stack_lvl+0xcd/0x134
[ 72.550387][ T6565] panic+0x2b0/0x6dd
[ 72.554584][ T6565] ? __warn_printk+0xf3/0xf3
[ 72.559187][ T6565] ? preempt_schedule_common+0x59/0xc0
[ 72.564913][ T6565] ? up_write+0x3ac/0x470
[ 72.569300][ T6565] ? preempt_schedule_thunk+0x16/0x18
[ 72.575184][ T6565] ? trace_hardirqs_on+0x38/0x1c0
[ 72.580654][ T6565] ? trace_hardirqs_on+0x51/0x1c0
[ 72.585768][ T6565] ? up_write+0x3ac/0x470
[ 72.590543][ T6565] ? up_write+0x3ac/0x470
[ 72.594882][ T6565] end_report.cold+0x63/0x6f
[ 72.599476][ T6565] kasan_report.cold+0x71/0xdf
[ 72.604316][ T6565] ? up_write+0x3ac/0x470
[ 72.608681][ T6565] up_write+0x3ac/0x470
[ 72.612974][ T6565] cgroup_setup_root+0x3a6/0xad0
[ 72.617940][ T6565] ? rebind_subsystems+0x10e0/0x10e0
[ 72.623274][ T6565] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 72.629518][ T6565] cgroup1_get_tree+0xd33/0x1390
[ 72.634471][ T6565] vfs_get_tree+0x89/0x2f0
[ 72.638887][ T6565] path_mount+0x1320/0x1fa0
[ 72.643448][ T6565] ? kmem_cache_free+0xba/0x4a0
[ 72.648307][ T6565] ? finish_automount+0xaf0/0xaf0
[ 72.653332][ T6565] ? putname+0xfe/0x140
[ 72.657492][ T6565] __x64_sys_mount+0x27f/0x300
[ 72.662265][ T6565] ? copy_mnt_ns+0xae0/0xae0
[ 72.666860][ T6565] ? syscall_enter_from_user_mode+0x21/0x70
[ 72.672765][ T6565] do_syscall_64+0x35/0xb0
[ 72.677187][ T6565] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 72.683283][ T6565] RIP: 0033:0x7fa354dff01a
[ 72.687700][ T6565] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 72.707409][ T6565] RSP: 002b:00007fff4948c888 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 72.715862][ T6565] RAX: ffffffffffffffda RBX: 00007fff4948ca18 RCX: 00007fa354dff01a
[ 72.723829][ T6565] RDX: 00007fa354e61fd6 RSI: 00007fa354e5829a RDI: 00007fa354e56d71
[ 72.731795][ T6565] RBP: 00007fa354e5829a R08: 00007fa354e583f7 R09: 0000000000000026
[ 72.740031][ T6565] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff4948c890
[ 72.748012][ T6565] R13: 00007fff4948ca38 R14: 00007fff4948c960 R15: 00007fa354e583f1
[ 72.756017][ T6565]
[ 72.759449][ T6565] Kernel Offset: disabled
[ 72.763770][ T6565] Rebooting in 86400 seconds..