INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.203' (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 [ 432.433410] ================================================================== [ 432.440894] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 [ 432.447634] Read of size 8 at addr ffff8801d6bd62e0 by task blkid/3635 [ 432.454288] [ 432.455909] CPU: 0 PID: 3635 Comm: blkid Not tainted 4.9.167+ #36 [ 432.462228] ffff8801d3cf7730 ffffffff81b4f011 0000000000000000 ffffea00075af400 [ 432.470240] ffff8801d6bd62e0 0000000000000008 ffffffff81b21575 ffff8801d3cf7768 [ 432.478447] ffffffff815065b8 0000000000000000 ffff8801d6bd62e0 ffff8801d6bd62e0 [ 432.486454] Call Trace: [ 432.489050] [<000000000ca82bdc>] dump_stack+0xc1/0x120 [ 432.494399] [<00000000be634828>] ? disk_unblock_events+0x55/0x60 [ 432.500792] [<000000004894983c>] print_address_description+0x6f/0x23a [ 432.507458] [<00000000be634828>] ? disk_unblock_events+0x55/0x60 [ 432.513800] [<0000000039468cb6>] kasan_report.cold+0x8c/0x2ba [ 432.519767] [<00000000a44b6e8d>] __asan_report_load8_noabort+0x14/0x20 [ 432.526500] [<00000000be634828>] disk_unblock_events+0x55/0x60 [ 432.532601] [<00000000b3635097>] __blkdev_get+0x6ba/0xeb0 [ 432.538217] [<00000000acd7b057>] ? __blkdev_put+0x840/0x840 [ 432.544135] [<00000000c7d800a2>] blkdev_get+0x2e8/0x920 [ 432.549617] [<000000001b5a14d5>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 432.556354] [<00000000a490610d>] ? bd_may_claim+0xd0/0xd0 [ 432.561960] [<00000000ae5f3e71>] ? bd_acquire+0x26/0x250 [ 432.567481] [<00000000cab56ad0>] ? bd_acquire+0x88/0x250 [ 432.573183] [<000000003966775a>] ? _raw_spin_unlock+0x2d/0x50 [ 432.579190] [<000000008a27f2d2>] blkdev_open+0x1aa/0x250 [ 432.584718] [<0000000023b7a0cb>] do_dentry_open+0x422/0xd20 [ 432.590558] [<0000000096843c61>] ? blkdev_get_by_dev+0x80/0x80 [ 432.596785] [<000000006c03c706>] vfs_open+0x105/0x230 [ 432.602105] [<00000000664a2cdd>] ? may_open.isra.0+0x139/0x290 [ 432.608214] [<0000000021b9cfb0>] path_openat+0xbf5/0x2f60 [ 432.613824] [<0000000052e509fc>] ? path_mountpoint+0x6d0/0x6d0 [ 432.619879] [<000000000e5e1772>] do_filp_open+0x1a1/0x280 [ 432.625581] [<00000000f0d6b8db>] ? may_open_dev+0xe0/0xe0 [ 432.631323] [<000000009af08838>] ? __alloc_fd+0x1d4/0x490 [ 432.636933] [<000000003966775a>] ? _raw_spin_unlock+0x2d/0x50 [ 432.642894] [<000000009af08838>] ? __alloc_fd+0x1d4/0x490 [ 432.648508] [<00000000ece024fc>] do_sys_open+0x2f0/0x610 [ 432.654171] [<00000000104e1066>] ? filp_open+0x70/0x70 [ 432.659690] [<000000004c9bfae7>] ? __do_page_fault+0x545/0xa60 [ 432.665731] [<0000000033b493a6>] SyS_open+0x2d/0x40 [ 432.670820] [<000000005358303b>] ? do_sys_open+0x610/0x610 [ 432.676517] [<000000002ea28934>] do_syscall_64+0x1ad/0x570 [ 432.682383] [<00000000a20961b4>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 432.689301] [ 432.690946] Allocated by task 3621: [ 432.694614] save_stack_trace+0x16/0x20 [ 432.698664] kasan_kmalloc.part.0+0x62/0xf0 [ 432.702962] kasan_kmalloc+0xb7/0xd0 [ 432.706732] kmem_cache_alloc_trace+0x115/0x2d0 [ 432.711390] alloc_disk_node+0x50/0x3c0 [ 432.715347] alloc_disk+0x1b/0x20 [ 432.718837] loop_add+0x37e/0x7b0 [ 432.722376] loop_control_ioctl+0x138/0x2f0 [ 432.726699] do_vfs_ioctl+0xb87/0x11d0 [ 432.730576] SyS_ioctl+0x8f/0xc0 [ 432.733924] do_syscall_64+0x1ad/0x570 [ 432.737835] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 432.742936] [ 432.744540] Freed by task 3635: [ 432.747807] save_stack_trace+0x16/0x20 [ 432.751766] kasan_slab_free+0xb0/0x190 [ 432.755726] kfree+0xfc/0x310 [ 432.758818] disk_release+0x255/0x330 [ 432.762648] device_release+0x7d/0x220 [ 432.766517] kobject_put+0x150/0x260 [ 432.770217] put_disk+0x23/0x30 [ 432.773534] __blkdev_get+0x61a/0xeb0 [ 432.777444] blkdev_get+0x2e8/0x920 [ 432.781095] blkdev_open+0x1aa/0x250 [ 432.784801] do_dentry_open+0x422/0xd20 [ 432.788756] vfs_open+0x105/0x230 [ 432.792193] path_openat+0xbf5/0x2f60 [ 432.796015] do_filp_open+0x1a1/0x280 [ 432.800027] do_sys_open+0x2f0/0x610 [ 432.803721] SyS_open+0x2d/0x40 [ 432.806985] do_syscall_64+0x1ad/0x570 [ 432.810851] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 432.815944] [ 432.817557] The buggy address belongs to the object at ffff8801d6bd5d80 [ 432.817557] which belongs to the cache kmalloc-2048 of size 2048 [ 432.830382] The buggy address is located 1376 bytes inside of [ 432.830382] 2048-byte region [ffff8801d6bd5d80, ffff8801d6bd6580) [ 432.842501] The buggy address belongs to the page: [ 432.847503] page:ffffea00075af400 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 432.857920] flags: 0x4000000000010200(slab|head) [ 432.862664] page dumped because: kasan: bad access detected [ 432.868447] [ 432.870093] Memory state around the buggy address: [ 432.875011] ffff8801d6bd6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 432.882351] ffff8801d6bd6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 432.889706] >ffff8801d6bd6280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 432.897150] ^ [ 432.903664] ffff8801d6bd6300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 432.911014] ffff8801d6bd6380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 432.918352] ================================================================== [ 432.925735] Disabling lock debugging due to kernel taint [ 432.931278] Kernel panic - not syncing: panic_on_warn set ... [ 432.931278] [ 432.938670] CPU: 0 PID: 3635 Comm: blkid Tainted: G B 4.9.167+ #36 [ 432.946447] ffff8801d3cf7670 ffffffff81b4f011 ffff8801d3cf7700 ffffffff82e3cb37 [ 432.954622] 00000000ffffffff 0000000000000000 ffffffff81b21575 ffff8801d3cf7750 [ 432.962894] ffffffff813f91aa 0000000041b58ab3 ffffffff82e2ec1a ffffffff813f8fd1 [ 432.971111] Call Trace: [ 432.973725] [<000000000ca82bdc>] dump_stack+0xc1/0x120 [ 432.979143] [<00000000be634828>] ? disk_unblock_events+0x55/0x60 [ 432.985441] [<00000000e3707c8b>] panic+0x1d9/0x3bd [ 432.990463] [<00000000d122e5f0>] ? add_taint.cold+0x16/0x16 [ 432.996428] [<0000000042570140>] ? preempt_schedule_common+0x4f/0xe0 [ 433.003054] [<00000000be634828>] ? disk_unblock_events+0x55/0x60 [ 433.009398] [<00000000a58836de>] ? preempt_schedule+0x26/0x30 [ 433.015362] [<00000000a5f2515d>] ? ___preempt_schedule+0x16/0x18 [ 433.021581] [<0000000026493f83>] kasan_end_report+0x47/0x4f [ 433.027373] [<00000000a6f9ce39>] kasan_report.cold+0xa9/0x2ba [ 433.033362] [<00000000a44b6e8d>] __asan_report_load8_noabort+0x14/0x20 [ 433.040225] [<00000000be634828>] disk_unblock_events+0x55/0x60 [ 433.046365] [<00000000b3635097>] __blkdev_get+0x6ba/0xeb0 [ 433.051993] [<00000000acd7b057>] ? __blkdev_put+0x840/0x840 [ 433.057785] [<00000000c7d800a2>] blkdev_get+0x2e8/0x920 [ 433.063219] [<000000001b5a14d5>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 433.069981] [<00000000a490610d>] ? bd_may_claim+0xd0/0xd0 [ 433.075593] [<00000000ae5f3e71>] ? bd_acquire+0x26/0x250 [ 433.081121] [<00000000cab56ad0>] ? bd_acquire+0x88/0x250 [ 433.086643] [<000000003966775a>] ? _raw_spin_unlock+0x2d/0x50 [ 433.092606] [<000000008a27f2d2>] blkdev_open+0x1aa/0x250 [ 433.098141] [<0000000023b7a0cb>] do_dentry_open+0x422/0xd20 [ 433.103928] [<0000000096843c61>] ? blkdev_get_by_dev+0x80/0x80 [ 433.110174] [<000000006c03c706>] vfs_open+0x105/0x230 [ 433.115447] [<00000000664a2cdd>] ? may_open.isra.0+0x139/0x290 [ 433.121733] [<0000000021b9cfb0>] path_openat+0xbf5/0x2f60 [ 433.127343] [<0000000052e509fc>] ? path_mountpoint+0x6d0/0x6d0 [ 433.133382] [<000000000e5e1772>] do_filp_open+0x1a1/0x280 [ 433.138999] [<00000000f0d6b8db>] ? may_open_dev+0xe0/0xe0 [ 433.144740] [<000000009af08838>] ? __alloc_fd+0x1d4/0x490 [ 433.150354] [<000000003966775a>] ? _raw_spin_unlock+0x2d/0x50 [ 433.156353] [<000000009af08838>] ? __alloc_fd+0x1d4/0x490 [ 433.161981] [<00000000ece024fc>] do_sys_open+0x2f0/0x610 [ 433.167501] [<00000000104e1066>] ? filp_open+0x70/0x70 [ 433.172850] [<000000004c9bfae7>] ? __do_page_fault+0x545/0xa60 [ 433.178911] [<0000000033b493a6>] SyS_open+0x2d/0x40 [ 433.184000] [<000000005358303b>] ? do_sys_open+0x610/0x610 [ 433.189694] [<000000002ea28934>] do_syscall_64+0x1ad/0x570 [ 433.195448] [<00000000a20961b4>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 433.203047] Kernel Offset: disabled [ 433.206776] Rebooting in 86400 seconds..