INIT: Id "4" 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 "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.194' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 452.242805] ================================================================== [ 452.250425] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 [ 452.257187] Read of size 8 at addr ffff8801cbfa1660 by task syz-executor539/2136 [ 452.265637] [ 452.267257] CPU: 1 PID: 2136 Comm: syz-executor539 Not tainted 4.9.185+ #8 [ 452.274487] ffff8801cbc77730 ffffffff81b5a081 0000000000000000 ffffea00072fe800 [ 452.282601] ffff8801cbfa1660 0000000000000008 ffffffff81b2c645 ffff8801cbc77768 [ 452.290927] ffffffff8150ab38 0000000000000000 ffff8801cbfa1660 ffff8801cbfa1660 [ 452.299186] Call Trace: [ 452.301944] [<000000001585c872>] dump_stack+0xc1/0x120 [ 452.307571] [<000000004d9c3142>] ? disk_unblock_events+0x55/0x60 [ 452.314733] [<00000000815fb9db>] print_address_description+0x6f/0x23a [ 452.321497] [<000000004d9c3142>] ? disk_unblock_events+0x55/0x60 [ 452.328311] [<0000000093b70c57>] kasan_report.cold+0x8c/0x2ba [ 452.334623] [<00000000749d0f8c>] __asan_report_load8_noabort+0x14/0x20 executing program executing program executing program executing program executing program executing program [ 452.341890] [<000000004d9c3142>] disk_unblock_events+0x55/0x60 [ 452.348093] [<0000000023cf2ae7>] __blkdev_get+0x6ba/0xeb0 [ 452.353713] [<000000003d1ee605>] ? __blkdev_put+0x840/0x840 [ 452.359779] [<00000000e7f9be5c>] ? __might_sleep+0x95/0x1a0 [ 452.365589] [<000000002e8366b6>] blkdev_get+0x2e8/0x920 [ 452.371913] [<000000001c7e5e80>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 452.379641] [<000000006cc6dbd2>] ? bd_may_claim+0xd0/0xd0 [ 452.385978] [<000000008c40f0cd>] ? bd_acquire+0xf9/0x250 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.391542] [<000000003b688957>] ? bd_acquire+0x12f/0x250 [ 452.397236] [<00000000266e7669>] ? _raw_spin_unlock+0x2d/0x50 [ 452.403629] [<000000005b4dcb09>] blkdev_open+0x1aa/0x250 [ 452.409164] [<000000004f419b20>] do_dentry_open+0x422/0xd20 [ 452.414958] [<00000000e374e302>] ? blkdev_get_by_dev+0x80/0x80 [ 452.421223] [<00000000277a2b92>] vfs_open+0x105/0x230 [ 452.426555] [<00000000e13f1486>] ? may_open.isra.0+0x139/0x290 [ 452.433319] [<00000000331c9101>] path_openat+0xbf5/0x2f60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.439347] [<0000000042dd4f65>] ? path_mountpoint+0x6d0/0x6d0 [ 452.445526] [<00000000f1b43364>] do_filp_open+0x1a1/0x280 [ 452.451457] [<00000000a0e7d9b4>] ? may_open_dev+0xe0/0xe0 [ 452.457077] [<00000000a9037794>] ? __alloc_fd+0x1d4/0x490 [ 452.462795] [<00000000266e7669>] ? _raw_spin_unlock+0x2d/0x50 [ 452.468773] [<00000000a9037794>] ? __alloc_fd+0x1d4/0x490 [ 452.474404] [<00000000016c1c79>] do_sys_open+0x2f0/0x610 [ 452.479948] [<000000001d1f2fad>] ? filp_open+0x70/0x70 [ 452.485492] [<0000000064005b87>] ? __do_page_fault+0x545/0xa60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.491912] [<00000000b2a4d081>] SyS_open+0x2d/0x40 [ 452.497017] [<00000000e9fc0329>] ? do_sys_open+0x610/0x610 [ 452.502733] [<000000000e7cab70>] do_syscall_64+0x1ad/0x5c0 [ 452.508452] [<00000000e9960f08>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 452.515483] [ 452.517108] Allocated by task 2136: [ 452.520818] save_stack_trace+0x16/0x20 [ 452.525181] kasan_kmalloc.part.0+0x62/0xf0 [ 452.530031] kasan_kmalloc+0xb7/0xd0 [ 452.534219] kmem_cache_alloc_trace+0x115/0x2d0 [ 452.539021] alloc_disk_node+0x50/0x3c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.543437] alloc_disk+0x1b/0x20 [ 452.547032] loop_add+0x37e/0x7d0 [ 452.550490] loop_control_ioctl+0x138/0x320 [ 452.554816] do_vfs_ioctl+0xb87/0x11d0 [ 452.558987] SyS_ioctl+0x8f/0xc0 [ 452.562360] do_syscall_64+0x1ad/0x5c0 [ 452.566349] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 452.571447] [ 452.573143] Freed by task 2136: [ 452.576553] save_stack_trace+0x16/0x20 [ 452.580832] kasan_slab_free+0xb0/0x190 [ 452.585244] kfree+0xfc/0x310 [ 452.588602] disk_release+0x255/0x330 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.592495] device_release+0x7d/0x220 [ 452.596474] kobject_put+0x150/0x260 [ 452.600187] put_disk+0x23/0x30 [ 452.603465] __blkdev_get+0x61a/0xeb0 [ 452.607271] blkdev_get+0x2e8/0x920 [ 452.611079] blkdev_open+0x1aa/0x250 [ 452.614891] do_dentry_open+0x422/0xd20 [ 452.618864] vfs_open+0x105/0x230 [ 452.622316] path_openat+0xbf5/0x2f60 [ 452.626122] do_filp_open+0x1a1/0x280 [ 452.629933] do_sys_open+0x2f0/0x610 [ 452.633652] SyS_open+0x2d/0x40 [ 452.636930] do_syscall_64+0x1ad/0x5c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.640825] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 452.645916] [ 452.647624] The buggy address belongs to the object at ffff8801cbfa1100 [ 452.647624] which belongs to the cache kmalloc-2048 of size 2048 [ 452.660461] The buggy address is located 1376 bytes inside of [ 452.660461] 2048-byte region [ffff8801cbfa1100, ffff8801cbfa1900) [ 452.672508] The buggy address belongs to the page: [ 452.677437] page:ffffea00072fe800 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 452.687821] flags: 0x4000000000010200(slab|head) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.692596] page dumped because: kasan: bad access detected [ 452.698298] [ 452.699916] Memory state around the buggy address: [ 452.704863] ffff8801cbfa1500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 452.712220] ffff8801cbfa1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 452.719578] >ffff8801cbfa1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 452.726937] ^ [ 452.733430] ffff8801cbfa1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.740789] ffff8801cbfa1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 452.748142] ================================================================== [ 452.755496] Disabling lock debugging due to kernel taint [ 452.762973] Kernel panic - not syncing: panic_on_warn set ... [ 452.762973] [ 452.770453] CPU: 1 PID: 2136 Comm: syz-executor539 Tainted: G B 4.9.185+ #8 [ 452.778681] ffff8801cbc77670 ffffffff81b5a081 ffff8801cbc77700 ffffffff82e3f707 [ 452.786798] 00000000ffffffff 0000000000000001 ffffffff81b2c645 ffff8801cbc77750 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.794903] ffffffff813fd56a 0000000041b58ab3 ffffffff82e31752 ffffffff813fd391 [ 452.803084] Call Trace: [ 452.805685] [<000000001585c872>] dump_stack+0xc1/0x120 [ 452.811399] [<000000004d9c3142>] ? disk_unblock_events+0x55/0x60 [ 452.818067] [<00000000b753b354>] panic+0x1d9/0x3bd [ 452.823096] [<00000000ca5c83bf>] ? add_taint.cold+0x16/0x16 [ 452.829005] [<0000000019cd3467>] ? preempt_schedule_common+0x4f/0xe0 [ 452.835599] [<000000004d9c3142>] ? disk_unblock_events+0x55/0x60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.841850] [<000000008a9208d3>] ? preempt_schedule+0x26/0x30 [ 452.847837] [<000000002fbee130>] ? ___preempt_schedule+0x16/0x18 [ 452.854119] [<0000000077325d9e>] kasan_end_report+0x47/0x4f [ 452.860026] [<000000001422e3d9>] kasan_report.cold+0xa9/0x2ba [ 452.866101] [<00000000749d0f8c>] __asan_report_load8_noabort+0x14/0x20 [ 452.872960] [<000000004d9c3142>] disk_unblock_events+0x55/0x60 [ 452.879230] [<0000000023cf2ae7>] __blkdev_get+0x6ba/0xeb0 [ 452.884865] [<000000003d1ee605>] ? __blkdev_put+0x840/0x840 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.890766] [<00000000e7f9be5c>] ? __might_sleep+0x95/0x1a0 [ 452.896584] [<000000002e8366b6>] blkdev_get+0x2e8/0x920 [ 452.902041] [<000000001c7e5e80>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 452.908899] [<000000006cc6dbd2>] ? bd_may_claim+0xd0/0xd0 [ 452.914528] [<000000008c40f0cd>] ? bd_acquire+0xf9/0x250 [ 452.920068] [<000000003b688957>] ? bd_acquire+0x12f/0x250 [ 452.925700] [<00000000266e7669>] ? _raw_spin_unlock+0x2d/0x50 [ 452.931850] [<000000005b4dcb09>] blkdev_open+0x1aa/0x250 [ 452.937401] [<000000004f419b20>] do_dentry_open+0x422/0xd20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.943204] [<00000000e374e302>] ? blkdev_get_by_dev+0x80/0x80 [ 452.949607] [<00000000277a2b92>] vfs_open+0x105/0x230 [ 452.954888] [<00000000e13f1486>] ? may_open.isra.0+0x139/0x290 [ 452.961229] [<00000000331c9101>] path_openat+0xbf5/0x2f60 [ 452.966855] [<0000000042dd4f65>] ? path_mountpoint+0x6d0/0x6d0 [ 452.972916] [<00000000f1b43364>] do_filp_open+0x1a1/0x280 [ 452.978553] [<00000000a0e7d9b4>] ? may_open_dev+0xe0/0xe0 [ 452.984190] [<00000000a9037794>] ? __alloc_fd+0x1d4/0x490 [ 452.989820] [<00000000266e7669>] ? _raw_spin_unlock+0x2d/0x50 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 452.995801] [<00000000a9037794>] ? __alloc_fd+0x1d4/0x490 [ 453.001461] [<00000000016c1c79>] do_sys_open+0x2f0/0x610 [ 453.007133] [<000000001d1f2fad>] ? filp_open+0x70/0x70 [ 453.012631] [<0000000064005b87>] ? __do_page_fault+0x545/0xa60 [ 453.018893] [<00000000b2a4d081>] SyS_open+0x2d/0x40 [ 453.024439] [<00000000e9fc0329>] ? do_sys_open+0x610/0x610 [ 453.030169] [<000000000e7cab70>] do_syscall_64+0x1ad/0x5c0 [ 453.035896] [<00000000e9960f08>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 453.043364] Kernel Offset: disabled [ 453.047098] Rebooting in 86400 seconds..