INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.1.18' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 807.778494] ================================================================== [ 807.786091] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 [ 807.793041] Read of size 8 at addr ffff8801d7116b60 by task syz-executor140/11422 [ 807.800633] [ 807.802242] CPU: 0 PID: 11422 Comm: syz-executor140 Not tainted 4.9.184+ #5 [ 807.809315] ffff8801cf1f7730 ffffffff81b580a1 0000000000000000 ffffea00075c4400 [ 807.817417] ffff8801d7116b60 0000000000000008 ffffffff81b2a665 ffff8801cf1f7768 [ 807.825405] ffffffff8150ac88 0000000000000000 ffff8801d7116b60 ffff8801d7116b60 [ 807.833462] Call Trace: [ 807.836059] [<000000004fad9cbe>] dump_stack+0xc1/0x120 [ 807.841402] [<000000005c001deb>] ? disk_unblock_events+0x55/0x60 [ 807.847661] [<000000009e33aea2>] print_address_description+0x6f/0x23a [ 807.854308] [<000000005c001deb>] ? disk_unblock_events+0x55/0x60 [ 807.860524] [<0000000023b94063>] kasan_report.cold+0x8c/0x2ba [ 807.866483] [<00000000dd90a103>] __asan_report_load8_noabort+0x14/0x20 [ 807.873257] [<000000005c001deb>] disk_unblock_events+0x55/0x60 [ 807.879360] [<0000000004379fa8>] __blkdev_get+0x6ba/0xeb0 [ 807.884970] [<000000008d38802f>] ? __blkdev_put+0x840/0x840 [ 807.890784] [<00000000d26c8df2>] blkdev_get+0x2e8/0x920 [ 807.896264] [<000000008ea7739c>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 807.903002] [<000000002b6ed3a2>] ? bd_may_claim+0xd0/0xd0 [ 807.908671] [<00000000af0c2b66>] ? bd_acquire+0x26/0x250 [ 807.914195] [<000000007421b025>] ? bd_acquire+0x88/0x250 [ 807.919775] [<000000008c283ae5>] ? _raw_spin_unlock+0x2d/0x50 [ 807.925726] [<000000003508c3c0>] blkdev_open+0x1aa/0x250 [ 807.931237] [<0000000033c555f9>] do_dentry_open+0x422/0xd20 [ 807.937007] [<00000000437bb457>] ? blkdev_get_by_dev+0x80/0x80 [ 807.943103] [<000000004754f591>] vfs_open+0x105/0x230 [ 807.948424] [<0000000066cf2d67>] ? may_open.isra.0+0x139/0x290 [ 807.954570] [<00000000948bc91e>] path_openat+0xbf5/0x2f60 [ 807.960173] [<000000000b186ab9>] ? path_mountpoint+0x6d0/0x6d0 [ 807.966207] [<0000000089f62ff8>] do_filp_open+0x1a1/0x280 [ 807.972033] [<000000005ea605ae>] ? may_open_dev+0xe0/0xe0 [ 807.977650] [<00000000e2e80aac>] ? __alloc_fd+0x1d4/0x490 [ 807.983250] [<000000008c283ae5>] ? _raw_spin_unlock+0x2d/0x50 [ 807.989205] [<00000000e2e80aac>] ? __alloc_fd+0x1d4/0x490 [ 807.994809] [<000000007bf86459>] do_sys_open+0x2f0/0x610 [ 808.000318] [<00000000ad0441b0>] ? filp_open+0x70/0x70 [ 808.005654] [<000000006e9903b7>] ? do_sys_ftruncate.constprop.0+0x361/0x470 [ 808.013683] [<000000004a1c07f4>] ? fput+0xd4/0x150 [ 808.018675] [<0000000024b8902b>] ? do_sys_ftruncate.constprop.0+0x375/0x470 [ 808.025838] [<000000000f1e79c9>] SyS_open+0x2d/0x40 [ 808.030917] [<0000000002424f05>] ? do_sys_open+0x610/0x610 [ 808.036657] [<000000006f644582>] do_syscall_64+0x1ad/0x5c0 [ 808.042373] [<0000000076f35bfe>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 808.049275] [ 808.050875] Allocated by task 11422: [ 808.054574] save_stack_trace+0x16/0x20 [ 808.058526] kasan_kmalloc.part.0+0x62/0xf0 [ 808.062823] kasan_kmalloc+0xb7/0xd0 [ 808.066510] kmem_cache_alloc_trace+0x115/0x2d0 [ 808.071151] alloc_disk_node+0x50/0x3c0 [ 808.075098] alloc_disk+0x1b/0x20 [ 808.078569] loop_add+0x37e/0x7d0 [ 808.082004] loop_control_ioctl+0x138/0x320 [ 808.086301] do_vfs_ioctl+0xb87/0x11d0 [ 808.090168] SyS_ioctl+0x8f/0xc0 [ 808.093504] do_syscall_64+0x1ad/0x5c0 [ 808.097361] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 808.102430] [ 808.104030] Freed by task 11422: [ 808.107384] save_stack_trace+0x16/0x20 [ 808.111327] kasan_slab_free+0xb0/0x190 [ 808.115270] kfree+0xfc/0x310 [ 808.118389] disk_release+0x255/0x330 [ 808.122205] device_release+0x7d/0x220 [ 808.126071] kobject_put+0x150/0x260 [ 808.129765] put_disk+0x23/0x30 [ 808.133024] __blkdev_get+0x61a/0xeb0 [ 808.136799] blkdev_get+0x2e8/0x920 [ 808.140397] blkdev_open+0x1aa/0x250 [ 808.144085] do_dentry_open+0x422/0xd20 [ 808.148030] vfs_open+0x105/0x230 [ 808.151457] path_openat+0xbf5/0x2f60 [ 808.155227] do_filp_open+0x1a1/0x280 [ 808.159059] do_sys_open+0x2f0/0x610 [ 808.162754] SyS_open+0x2d/0x40 [ 808.166017] do_syscall_64+0x1ad/0x5c0 [ 808.169926] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 808.175012] [ 808.176623] The buggy address belongs to the object at ffff8801d7116600 [ 808.176623] which belongs to the cache kmalloc-2048 of size 2048 [ 808.189485] The buggy address is located 1376 bytes inside of [ 808.189485] 2048-byte region [ffff8801d7116600, ffff8801d7116e00) [ 808.201511] The buggy address belongs to the page: [ 808.206421] page:ffffea00075c4400 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 808.216595] flags: 0x4000000000010200(slab|head) [ 808.221375] page dumped because: kasan: bad access detected [ 808.227063] [ 808.228663] Memory state around the buggy address: [ 808.233624] ffff8801d7116a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 808.240966] ffff8801d7116a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 808.248336] >ffff8801d7116b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 808.255673] ^ [ 808.262138] ffff8801d7116b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 808.269479] ffff8801d7116c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 808.276804] ================================================================== [ 808.284139] Disabling lock debugging due to kernel taint [ 808.289777] Kernel panic - not syncing: panic_on_warn set ... [ 808.289777] [ 808.297133] CPU: 0 PID: 11422 Comm: syz-executor140 Tainted: G B 4.9.184+ #5 [ 808.305420] ffff8801cf1f7670 ffffffff81b580a1 ffff8801cf1f7700 ffffffff82e3f38f [ 808.313413] 00000000ffffffff 0000000000000000 ffffffff81b2a665 ffff8801cf1f7750 [ 808.321435] ffffffff813fd67a 0000000041b58ab3 ffffffff82e313da ffffffff813fd4a1 [ 808.329493] Call Trace: [ 808.332057] [<000000004fad9cbe>] dump_stack+0xc1/0x120 [ 808.337401] [<000000005c001deb>] ? disk_unblock_events+0x55/0x60 [ 808.343642] [<00000000ff80f0b2>] panic+0x1d9/0x3bd [ 808.348633] [<00000000228a4da4>] ? add_taint.cold+0x16/0x16 [ 808.354406] [<000000008ea21d62>] ? preempt_schedule_common+0x4f/0xe0 [ 808.360962] [<000000005c001deb>] ? disk_unblock_events+0x55/0x60 [ 808.367174] [<00000000a20ce83b>] ? preempt_schedule+0x26/0x30 [ 808.373123] [<0000000012d04305>] ? ___preempt_schedule+0x16/0x18 [ 808.379332] [<00000000adea0015>] kasan_end_report+0x47/0x4f [ 808.385209] [<00000000552f68fd>] kasan_report.cold+0xa9/0x2ba [ 808.391163] [<00000000dd90a103>] __asan_report_load8_noabort+0x14/0x20 [ 808.397899] [<000000005c001deb>] disk_unblock_events+0x55/0x60 [ 808.404144] [<0000000004379fa8>] __blkdev_get+0x6ba/0xeb0 [ 808.409757] [<000000008d38802f>] ? __blkdev_put+0x840/0x840 [ 808.415528] [<00000000d26c8df2>] blkdev_get+0x2e8/0x920 [ 808.420951] [<000000008ea7739c>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 808.427676] [<000000002b6ed3a2>] ? bd_may_claim+0xd0/0xd0 [ 808.433272] [<00000000af0c2b66>] ? bd_acquire+0x26/0x250 [ 808.438779] [<000000007421b025>] ? bd_acquire+0x88/0x250 [ 808.444349] [<000000008c283ae5>] ? _raw_spin_unlock+0x2d/0x50 [ 808.450305] [<000000003508c3c0>] blkdev_open+0x1aa/0x250 [ 808.455819] [<0000000033c555f9>] do_dentry_open+0x422/0xd20 [ 808.461587] [<00000000437bb457>] ? blkdev_get_by_dev+0x80/0x80 [ 808.467622] [<000000004754f591>] vfs_open+0x105/0x230 [ 808.472873] [<0000000066cf2d67>] ? may_open.isra.0+0x139/0x290 [ 808.478906] [<00000000948bc91e>] path_openat+0xbf5/0x2f60 [ 808.484520] [<000000000b186ab9>] ? path_mountpoint+0x6d0/0x6d0 [ 808.490558] [<0000000089f62ff8>] do_filp_open+0x1a1/0x280 [ 808.496219] [<000000005ea605ae>] ? may_open_dev+0xe0/0xe0 [ 808.501825] [<00000000e2e80aac>] ? __alloc_fd+0x1d4/0x490 [ 808.507425] [<000000008c283ae5>] ? _raw_spin_unlock+0x2d/0x50 [ 808.513369] [<00000000e2e80aac>] ? __alloc_fd+0x1d4/0x490 [ 808.518967] [<000000007bf86459>] do_sys_open+0x2f0/0x610 [ 808.524485] [<00000000ad0441b0>] ? filp_open+0x70/0x70 [ 808.529831] [<000000006e9903b7>] ? do_sys_ftruncate.constprop.0+0x361/0x470 [ 808.536994] [<000000004a1c07f4>] ? fput+0xd4/0x150 [ 808.541987] [<0000000024b8902b>] ? do_sys_ftruncate.constprop.0+0x375/0x470 [ 808.549146] [<000000000f1e79c9>] SyS_open+0x2d/0x40 [ 808.554220] [<0000000002424f05>] ? do_sys_open+0x610/0x610 [ 808.559904] [<000000006f644582>] do_syscall_64+0x1ad/0x5c0 [ 808.565595] [<0000000076f35bfe>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 808.572816] Kernel Offset: disabled [ 808.576423] Rebooting in 86400 seconds..