proc: unrecognized mount option "Ó" or missing value EXT4-fs (loop2): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop2): group descriptors corrupted! ================================================================== kasan: CONFIG_KASAN_INLINE enabled BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:188 [inline] BUG: KASAN: use-after-free in list_empty include/linux/list.h:203 [inline] BUG: KASAN: use-after-free in shrink_slab_memcg mm/vmscan.c:595 [inline] BUG: KASAN: use-after-free in shrink_slab+0xa04/0xa60 mm/vmscan.c:671 Read of size 8 at addr ffff8801974de858 by task syz-executor3/4483 kasan: GPF could be caused by NULL-ptr deref or user memory access CPU: 1 PID: 4483 Comm: syz-executor3 Not tainted 4.18.0-rc4-next-20180713+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 20961 Comm: syz-executor3 Not tainted 4.18.0-rc4-next-20180713+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:list_lru_from_memcg_idx mm/list_lru.c:56 [inline] RIP: 0010:list_lru_count_one+0x156/0x460 mm/list_lru.c:201 Code: 08 print_address_description+0x6c/0x20b mm/kasan/report.c:256 3c 03 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 0f __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 8e __read_once_size include/linux/compiler.h:188 [inline] list_empty include/linux/list.h:203 [inline] shrink_slab_memcg mm/vmscan.c:595 [inline] shrink_slab+0xa04/0xa60 mm/vmscan.c:671 b5 02 00 00 4d 63 bd shrink_node+0x429/0x16a0 mm/vmscan.c:2735 d8 0a 00 00 e8 7f 35 d2 ff shrink_zones mm/vmscan.c:2964 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026 48 8d 7b try_to_free_mem_cgroup_pages+0x49d/0xc90 mm/vmscan.c:3324 50 48 b8 00 00 00 00 00 fc reclaim_high.constprop.73+0x137/0x1e0 mm/memcontrol.c:2060 ff df 48 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:2085 89 tracehook_notify_resume include/linux/tracehook.h:195 [inline] exit_to_usermode_loop+0x287/0x380 arch/x86/entry/common.c:166 fa 48 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 c1 ea 03 <80> 3c 02 entry_SYSCALL_64_after_hwframe+0x49/0xbe 00 RIP: 0033:0x45416a 0f Code: 85 f7 d8 d8 02 64 00 89 00 04 49 25 8d d4 46 02 c0 00 4c 00 8b 64 6b 4c 50 8b 48 0c ba 25 00 10 00 00 00 RSP: 0018:ffff88019c68f1e0 EFLAGS: 00010206 00 31 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3a64 d2 RDX: 000000000000000a RSI: ffffffff81aa3ad1 RDI: 0000000000000050 4d RBP: ffff88019c68f270 R08: ffff8801cdb76740 R09: 0000000000000000 8d R10: ffffed00399f1488 R11: ffff8801ccf8a447 R12: 1ffff100338d1e3d 91 R13: ffff8801982a8540 R14: ffff88019c68f248 R15: 0000000000000007 d0 FS: 000000000261c940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 02 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 00 CR2: 000000000261cc10 CR3: 000000018d615000 CR4: 00000000001406f0 00 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 31 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 f6 Call Trace: bf 11 list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x153/0x2e0 fs/super.c:146 00 do_shrink_slab+0x148/0xc50 mm/vmscan.c:458 20 01 b8 38 00 00 00 0f shrink_slab_memcg mm/vmscan.c:598 [inline] shrink_slab+0x861/0xa60 mm/vmscan.c:671 05 <48> 3d 00 f0 ff shrink_node+0x429/0x16a0 mm/vmscan.c:2735 ff 0f 87 f5 00 00 shrink_zones mm/vmscan.c:2964 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026 00 85 c0 41 try_to_free_mem_cgroup_pages+0x49d/0xc90 mm/vmscan.c:3324 89 c5 0f 85 fc 00 00 reclaim_high.constprop.73+0x137/0x1e0 mm/memcontrol.c:2060 RSP: 002b:00007fff42595e10 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: 0000000000000545 RBX: 00007fff42595e10 RCX: 000000000045416a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:2085 RBP: 00007fff42595e50 R08: 0000000000000001 R09: 000000000261c940 tracehook_notify_resume include/linux/tracehook.h:195 [inline] exit_to_usermode_loop+0x287/0x380 arch/x86/entry/common.c:166 R10: 000000000261cc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000007034c0 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x533/0x5e0 arch/x86/entry/common.c:268 Allocated by task 20871: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 ret_from_fork+0x15/0x50 arch/x86/entry/entry_64.S:407 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620 RIP: 0033:0x45416a kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] alloc_super+0xd4/0xb10 fs/super.c:199 Code: sget_fc+0x269/0x950 fs/super.c:533 Bad RIP value. vfs_get_super+0x6e/0x270 fs/super.c:1255 RSP: 002b:00007fff42595e10 EFLAGS: 00000246 proc_get_tree+0x88/0xb0 fs/proc/root.c:159 ORIG_RAX: 0000000000000038 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 RAX: 0000000000000000 RBX: 00007fff42595e10 RCX: 000000000045416a do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 ksys_mount+0x12d/0x140 fs/namespace.c:3105 RBP: 00007fff42595e50 R08: 0000000000000001 R09: 000000000261c940 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 R10: 000000000261cc10 R11: 0000000000000246 R12: 0000000000000001 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000007034c0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Modules linked in: Freed by task 40: Dumping ftrace buffer: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 (ftrace buffer empty) set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 ---[ end trace 95f748ed38c11134 ]--- kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 destroy_super_work+0x40/0x50 fs/super.c:164 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:list_lru_from_memcg_idx mm/list_lru.c:56 [inline] RIP: 0010:list_lru_count_one+0x156/0x460 mm/list_lru.c:201 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 Code: ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8801974de100 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 1880 bytes inside of 4096-byte region [ffff8801974de100, ffff8801974df100) 08 The buggy address belongs to the page: page:ffffea00065d3780 count:1 mapcount:0 mapping:ffff8801da800dc0 index:0x0 compound_mapcount: 0 3c flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006366188 ffffea000654e008 ffff8801da800dc0 03 raw: 0000000000000000 ffff8801974de100 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected 0f Memory state around the buggy address: ffff8801974de700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801974de780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 8e >ffff8801974de800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801974de880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb b5 ffff8801974de900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================