IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Invalid device [./file0], error=-15 XFS (loop7): nobarrier option is deprecated, ignoring. XFS (loop7): Invalid device [./file0], error=-15 ================================================================== BUG: KASAN: use-after-free in radix_tree_next_chunk+0xde1/0xdf0 lib/radix-tree.c:1733 Read of size 4 at addr ffff8801b1669250 by task syzkaller476032/4458 CPU: 1 PID: 4458 Comm: syzkaller476032 Not tainted 4.16.0-rc7+ #7 IPVS: ftp: loaded support on port[0] = 21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 radix_tree_next_chunk+0xde1/0xdf0 lib/radix-tree.c:1733 radix_tree_gang_lookup_tag+0x36e/0x5e0 lib/radix-tree.c:1918 IPVS: ftp: loaded support on port[0] = 21 xfs_perag_get_tag+0x109/0x6c0 fs/xfs/libxfs/xfs_sb.c:88 IPVS: ftp: loaded support on port[0] = 21 xfs_reclaim_inodes_count+0x82/0xb0 fs/xfs/xfs_icache.c:1362 xfs_fs_nr_cached_objects+0x37/0x50 fs/xfs/xfs_super.c:1778 super_cache_count+0x96/0x280 fs/super.c:131 do_shrink_slab mm/vmscan.c:310 [inline] shrink_slab.part.46+0x30c/0xe80 mm/vmscan.c:475 shrink_slab+0x9d/0xb0 mm/vmscan.c:442 shrink_node+0x51e/0xf70 mm/vmscan.c:2556 shrink_zones mm/vmscan.c:2728 [inline] do_try_to_free_pages+0x383/0x1020 mm/vmscan.c:2790 try_to_free_mem_cgroup_pages+0x44d/0xb40 mm/vmscan.c:3079 IPVS: ftp: loaded support on port[0] = 21 reclaim_high.constprop.64+0x1e2/0x330 mm/memcontrol.c:1862 IPVS: ftp: loaded support on port[0] = 21 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:1887 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x242/0x2f0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ec/0x940 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x440fda RSP: 002b:00007ffd309f1880 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000440fda RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd309f18a0 R08: 0000000000000001 R09: 00000000020eb880 R10: 00000000020ebb50 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd309f18d0 R14: 0000000000000000 R15: 00007ffd309f19e8 Allocated by task 4469: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552 kmem_cache_alloc_trace+0x136/0x740 mm/slab.c:3608 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] xfs_fs_fill_super+0xd1/0x1220 fs/xfs/xfs_super.c:1579 mount_bdev+0x2b7/0x370 fs/super.c:1119 xfs_fs_mount+0x34/0x40 fs/xfs/xfs_super.c:1770 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 4469: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527 __cache_free mm/slab.c:3486 [inline] kfree+0xd9/0x260 mm/slab.c:3801 xfs_fs_fill_super+0x6c3/0x1220 fs/xfs/xfs_super.c:1734 mount_bdev+0x2b7/0x370 fs/super.c:1119 xfs_fs_mount+0x34/0x40 fs/xfs/xfs_super.c:1770 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff8801b1668e80 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 976 bytes inside of 4096-byte region [ffff8801b1668e80, ffff8801b1669e80) The buggy address belongs to the page: page:ffffea0006c59a00 count:1 mapcount:0 mapping:ffff8801b1668e80 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801b1668e80 0000000000000000 0000000100000001 raw: ffffea0006c5a2a0 ffffea0006cc47a0 ffff8801dac00dc0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b1669100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801b1669180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801b1669200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801b1669280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801b1669300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================