REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3829/0x5020 kernel/locking/lockdep.c:3291 Read of size 8 at addr ffff8801d57b98f8 by task syz-executor0/1020 CPU: 0 PID: 1020 Comm: syz-executor0 Not tainted 4.18.0-next-20180814+ #38 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 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __lock_acquire+0x3829/0x5020 kernel/locking/lockdep.c:3291 lock_acquire+0x1e4/0x4f0 kernel/locking/lockdep.c:3901 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x171/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 blkdev_get+0x5f2/0xb50 fs/block_dev.c:1623 blkdev_get_by_dev+0x3f/0x80 fs/block_dev.c:1739 journal_init_dev fs/reiserfs/journal.c:2628 [inline] journal_init+0xcad/0x6a20 fs/reiserfs/journal.c:2775 reiserfs_fill_super+0xd74/0x3930 fs/reiserfs/super.c:2037 mount_bdev+0x314/0x3e0 fs/super.c:1347 get_super_block+0x3c/0x50 fs/reiserfs/super.c:2608 legacy_get_tree+0x131/0x460 fs/fs_context.c:732 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746 do_new_mount fs/namespace.c:2627 [inline] do_mount+0x6f9/0x1e30 fs/namespace.c:2951 ksys_mount+0x12d/0x140 fs/namespace.c:3167 __do_sys_mount fs/namespace.c:3181 [inline] __se_sys_mount fs/namespace.c:3178 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459aba Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 9a 8a fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fbf74e4aa88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbf74e4ab30 RCX: 0000000000459aba RDX: 00007fbf74e4aad0 RSI: 0000000020000040 RDI: 00007fbf74e4aaf0 RBP: 0000000020000040 R08: 00007fbf74e4ab30 R09: 00007fbf74e4aad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000004c9b59 R15: 0000000000000000 Allocated by task 1020: 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 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x710 mm/slab.c:3554 bdev_alloc_inode+0x1b/0x40 fs/block_dev.c:730 alloc_inode+0x63/0x190 fs/inode.c:210 iget5_locked+0x12e/0x1d0 fs/inode.c:1123 bdget+0xb7/0x5e0 fs/block_dev.c:871 blkdev_get_by_dev+0x24/0x80 fs/block_dev.c:1735 journal_init_dev fs/reiserfs/journal.c:2628 [inline] journal_init+0xcad/0x6a20 fs/reiserfs/journal.c:2775 reiserfs_fill_super+0xd74/0x3930 fs/reiserfs/super.c:2037 mount_bdev+0x314/0x3e0 fs/super.c:1347 get_super_block+0x3c/0x50 fs/reiserfs/super.c:2608 legacy_get_tree+0x131/0x460 fs/fs_context.c:732 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746 do_new_mount fs/namespace.c:2627 [inline] do_mount+0x6f9/0x1e30 fs/namespace.c:2951 ksys_mount+0x12d/0x140 fs/namespace.c:3167 __do_sys_mount fs/namespace.c:3181 [inline] __se_sys_mount fs/namespace.c:3178 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 4442: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x280 mm/slab.c:3756 bdev_i_callback+0x20/0x30 fs/block_dev.c:741 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2576 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2880 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2847 [inline] rcu_process_callbacks+0xf78/0x27c0 kernel/rcu/tree.c:2864 __do_softirq+0x2e8/0xa6d kernel/softirq.c:292 The buggy address belongs to the object at ffff8801d57b9880 which belongs to the cache bdev_cache of size 1336 The buggy address is located 120 bytes inside of 1336-byte region [ffff8801d57b9880, ffff8801d57b9db8) The buggy address belongs to the page: page:ffffea000755ee40 count:1 mapcount:0 mapping:ffff8801dad754c0 index:0xffff8801d57b9ffe flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea000755cc88 ffffea000724e188 ffff8801dad754c0 raw: ffff8801d57b9ffe ffff8801d57b92c0 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d57b9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff8801d57b9800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d57b9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801d57b9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d57b9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================