DUID 00:04:83:15:3d:b3:f9:44:11:d6:e6:e1:d9:1f:49:4d:f4:66 forked to background, child pid 3181 [ 42.347711][ T3182] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.381447][ T3182] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.72' (ECDSA) to the list of known hosts. syzkaller login: [ 64.068887][ T3597] cgroup: Unknown subsys name 'net' [ 64.169401][ T3597] cgroup: Unknown subsys name 'rlimit' executing program [ 64.330983][ T3599] ================================================================== [ 64.339168][ T3599] BUG: KASAN: use-after-free in __lock_acquire+0x3d86/0x54a0 [ 64.346550][ T3599] Read of size 8 at addr ffff888011a36840 by task syz-executor048/3599 [ 64.354785][ T3599] [ 64.357162][ T3599] CPU: 0 PID: 3599 Comm: syz-executor048 Not tainted 5.16.0-rc5-syzkaller #0 [ 64.365914][ T3599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.375975][ T3599] Call Trace: [ 64.379256][ T3599] [ 64.382183][ T3599] dump_stack_lvl+0xcd/0x134 [ 64.386792][ T3599] print_address_description.constprop.0.cold+0x8d/0x320 [ 64.393819][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.398843][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.403869][ T3599] kasan_report.cold+0x83/0xdf [ 64.408643][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.413671][ T3599] __lock_acquire+0x3d86/0x54a0 [ 64.418527][ T3599] ? __lock_acquire+0xbc2/0x54a0 [ 64.423479][ T3599] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.429484][ T3599] lock_acquire+0x1ab/0x510 [ 64.434028][ T3599] ? remove_wait_queue+0x1d/0x180 [ 64.439072][ T3599] ? lock_release+0x720/0x720 [ 64.443769][ T3599] ? lock_release+0x720/0x720 [ 64.448448][ T3599] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 64.453826][ T3599] _raw_spin_lock_irqsave+0x39/0x50 [ 64.459029][ T3599] ? remove_wait_queue+0x1d/0x180 [ 64.464056][ T3599] remove_wait_queue+0x1d/0x180 [ 64.468912][ T3599] ep_remove_wait_queue+0x88/0x1a0 [ 64.474027][ T3599] ep_remove+0x106/0x9c0 [ 64.478276][ T3599] eventpoll_release_file+0xe1/0x130 [ 64.483566][ T3599] __fput+0x87b/0x9f0 [ 64.487550][ T3599] task_work_run+0xdd/0x1a0 [ 64.492059][ T3599] exit_to_user_mode_prepare+0x27e/0x290 [ 64.497693][ T3599] syscall_exit_to_user_mode+0x19/0x60 [ 64.503158][ T3599] do_syscall_64+0x42/0xb0 [ 64.507581][ T3599] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 64.513480][ T3599] RIP: 0033:0x7fe98399eef3 [ 64.517892][ T3599] Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 [ 64.537515][ T3599] RSP: 002b:00007ffe94b8f958 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 64.545948][ T3599] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fe98399eef3 [ 64.553915][ T3599] RDX: 000000000000002f RSI: 0000000020001340 RDI: 0000000000000004 [ 64.562018][ T3599] RBP: 0000000000000000 R08: 0000000000000014 R09: 00007ffe94b8f980 [ 64.570264][ T3599] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe94b8f97c [ 64.578237][ T3599] R13: 00007ffe94b8f990 R14: 00007ffe94b8f9d0 R15: 0000000000000000 [ 64.586214][ T3599] [ 64.589226][ T3599] [ 64.591628][ T3599] Allocated by task 3599: [ 64.595941][ T3599] kasan_save_stack+0x1e/0x50 [ 64.600621][ T3599] __kasan_kmalloc+0xa9/0xd0 [ 64.605206][ T3599] psi_trigger_create.part.0+0x15e/0x7f0 [ 64.610841][ T3599] cgroup_pressure_write+0x15d/0x6b0 [ 64.616127][ T3599] cgroup_file_write+0x1ec/0x780 [ 64.621064][ T3599] kernfs_fop_write_iter+0x342/0x500 [ 64.626350][ T3599] new_sync_write+0x429/0x660 [ 64.631030][ T3599] vfs_write+0x7cd/0xae0 [ 64.635273][ T3599] ksys_write+0x12d/0x250 [ 64.639600][ T3599] do_syscall_64+0x35/0xb0 [ 64.644019][ T3599] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 64.650136][ T3599] [ 64.652453][ T3599] Freed by task 3599: [ 64.656423][ T3599] kasan_save_stack+0x1e/0x50 [ 64.661115][ T3599] kasan_set_track+0x21/0x30 [ 64.665701][ T3599] kasan_set_free_info+0x20/0x30 [ 64.670639][ T3599] __kasan_slab_free+0xff/0x130 [ 64.675488][ T3599] slab_free_freelist_hook+0x8b/0x1c0 [ 64.682159][ T3599] kfree+0xf6/0x560 [ 64.685963][ T3599] cgroup_pressure_write+0x18d/0x6b0 [ 64.691244][ T3599] cgroup_file_write+0x1ec/0x780 [ 64.696176][ T3599] kernfs_fop_write_iter+0x342/0x500 [ 64.701465][ T3599] new_sync_write+0x429/0x660 [ 64.706142][ T3599] vfs_write+0x7cd/0xae0 [ 64.710381][ T3599] ksys_write+0x12d/0x250 [ 64.714717][ T3599] do_syscall_64+0x35/0xb0 [ 64.719146][ T3599] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 64.725045][ T3599] [ 64.727364][ T3599] The buggy address belongs to the object at ffff888011a36800 [ 64.727364][ T3599] which belongs to the cache kmalloc-192 of size 192 [ 64.741411][ T3599] The buggy address is located 64 bytes inside of [ 64.741411][ T3599] 192-byte region [ffff888011a36800, ffff888011a368c0) [ 64.754590][ T3599] The buggy address belongs to the page: [ 64.760202][ T3599] page:ffffea0000468d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11a36 [ 64.770346][ T3599] flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) [ 64.777893][ T3599] raw: 00fff00000000200 0000000000000000 dead000000000001 ffff888010c41a00 [ 64.786479][ T3599] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 64.795050][ T3599] page dumped because: kasan: bad access detected [ 64.801455][ T3599] page_owner tracks the page as allocated [ 64.807240][ T3599] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(), pid 1, ts 1906309021, free_ts 0 [ 64.818514][ T3599] register_early_stack+0x66/0xb0 [ 64.823549][ T3599] init_page_owner+0x4e/0x920 [ 64.828246][ T3599] page_ext_init+0x4c9/0x4dc [ 64.832847][ T3599] kernel_init_freeable+0x48b/0x73a [ 64.838079][ T3599] page_owner free stack trace missing [ 64.843456][ T3599] [ 64.845780][ T3599] Memory state around the buggy address: [ 64.851403][ T3599] ffff888011a36700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.859464][ T3599] ffff888011a36780: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 64.867517][ T3599] >ffff888011a36800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.875566][ T3599] ^ [ 64.881720][ T3599] ffff888011a36880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 64.889801][ T3599] ffff888011a36900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.899414][ T3599] ================================================================== [ 64.907461][ T3599] Disabling lock debugging due to kernel taint [ 64.913599][ T3599] Kernel panic - not syncing: panic_on_warn set ... [ 64.920173][ T3599] CPU: 0 PID: 3599 Comm: syz-executor048 Tainted: G B 5.16.0-rc5-syzkaller #0 [ 64.930408][ T3599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.940811][ T3599] Call Trace: [ 64.944086][ T3599] [ 64.947066][ T3599] dump_stack_lvl+0xcd/0x134 [ 64.951659][ T3599] panic+0x2b0/0x6dd [ 64.955574][ T3599] ? __warn_printk+0xf3/0xf3 [ 64.960165][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.965190][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.970236][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.975260][ T3599] end_report.cold+0x63/0x6f [ 64.979851][ T3599] kasan_report.cold+0x71/0xdf [ 64.984622][ T3599] ? __lock_acquire+0x3d86/0x54a0 [ 64.989646][ T3599] __lock_acquire+0x3d86/0x54a0 [ 64.994586][ T3599] ? __lock_acquire+0xbc2/0x54a0 [ 64.999523][ T3599] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 65.005513][ T3599] lock_acquire+0x1ab/0x510 [ 65.010014][ T3599] ? remove_wait_queue+0x1d/0x180 [ 65.015037][ T3599] ? lock_release+0x720/0x720 [ 65.019716][ T3599] ? lock_release+0x720/0x720 [ 65.024389][ T3599] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 65.029770][ T3599] _raw_spin_lock_irqsave+0x39/0x50 [ 65.034970][ T3599] ? remove_wait_queue+0x1d/0x180 [ 65.039994][ T3599] remove_wait_queue+0x1d/0x180 [ 65.044848][ T3599] ep_remove_wait_queue+0x88/0x1a0 [ 65.049963][ T3599] ep_remove+0x106/0x9c0 [ 65.054207][ T3599] eventpoll_release_file+0xe1/0x130 [ 65.059499][ T3599] __fput+0x87b/0x9f0 [ 65.063482][ T3599] task_work_run+0xdd/0x1a0 [ 65.067991][ T3599] exit_to_user_mode_prepare+0x27e/0x290 [ 65.073717][ T3599] syscall_exit_to_user_mode+0x19/0x60 [ 65.079177][ T3599] do_syscall_64+0x42/0xb0 [ 65.083596][ T3599] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 65.089490][ T3599] RIP: 0033:0x7fe98399eef3 [ 65.093906][ T3599] Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 [ 65.113511][ T3599] RSP: 002b:00007ffe94b8f958 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 65.121922][ T3599] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fe98399eef3 [ 65.129891][ T3599] RDX: 000000000000002f RSI: 0000000020001340 RDI: 0000000000000004 [ 65.137855][ T3599] RBP: 0000000000000000 R08: 0000000000000014 R09: 00007ffe94b8f980 [ 65.145822][ T3599] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe94b8f97c [ 65.153791][ T3599] R13: 00007ffe94b8f990 R14: 00007ffe94b8f9d0 R15: 0000000000000000 [ 65.161769][ T3599] [ 65.165007][ T3599] Kernel Offset: disabled [ 65.169322][ T3599] Rebooting in 86400 seconds..