ntfs: (device loop0): ntfs_read_inode_mount(): Failed. Marking inode as bad. ntfs: (device loop0): ntfs_fill_super(): Failed to load essential metadata. ntfs: (device loop5): is_boot_sector_ntfs(): Invalid end of sector marker. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x9df/0xb00 fs/ntfs/attrib.c:599 Read of size 4 at addr ffff8881c612ad35 by task syz-executor5/4459 CPU: 0 PID: 4459 Comm: syz-executor5 Not tainted 5.6.0-rc6-syzkaller #0 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+0x12f/0x187 lib/dump_stack.c:118 print_address_description.constprop.8+0x3b/0x60 mm/kasan/report.c:374 __kasan_report.cold.11+0x1b/0x32 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:641 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/generic_report.c:145 ntfs_attr_find+0x9df/0xb00 fs/ntfs/attrib.c:599 ntfs_external_attr_find fs/ntfs/attrib.c:1093 [inline] ntfs_attr_lookup+0x10c9/0x23c0 fs/ntfs/attrib.c:1191 ntfs_read_inode_mount+0x6bf/0x20c0 fs/ntfs/inode.c:1832 ntfs_fill_super+0x1217/0x2d40 fs/ntfs/super.c:2857 mount_bdev+0x27b/0x340 fs/super.c:1417 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3051 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:622 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547 do_new_mount fs/namespace.c:2822 [inline] do_mount+0x1285/0x1b70 fs/namespace.c:3107 __do_sys_mount fs/namespace.c:3316 [inline] __se_sys_mount fs/namespace.c:3293 [inline] __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3293 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457dea Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f 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 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f8157c1dbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457dea RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8157c1dc00 RBP: 0000000000000002 R08: 000000002007e200 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 000000000000066c R14: 00000000006fbac0 R15: 0000000000000000 Allocated by task 4424: save_stack+0x21/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc.constprop.7+0xc1/0xd0 mm/kasan/common.c:515 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529 __do_kmalloc_node mm/slab.c:3616 [inline] __kmalloc_node_track_caller+0x4d/0x70 mm/slab.c:3630 __kmalloc_reserve.isra.49+0x2c/0xc0 net/core/skbuff.c:142 __alloc_skb+0xd7/0x570 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1081 [inline] netlink_dump+0x694/0x1270 net/netlink/af_netlink.c:2225 __netlink_dump_start+0x589/0x8c0 net/netlink/af_netlink.c:2353 netlink_dump_start include/linux/netlink.h:233 [inline] rtnetlink_rcv_msg+0x583/0x8b0 net/core/rtnetlink.c:5399 netlink_rcv_skb+0x13a/0x3d0 net/netlink/af_netlink.c:2478 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:5454 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x471/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7b2/0xca0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 __sys_sendto+0x200/0x320 net/socket.c:1998 __do_sys_sendto net/socket.c:2010 [inline] __se_sys_sendto net/socket.c:2006 [inline] __x64_sys_sendto+0xdc/0x1a0 net/socket.c:2006 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 4424: save_stack+0x21/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:337 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/common.c:476 kasan_slab_free+0xe/0x10 mm/kasan/common.c:485 __cache_free mm/slab.c:3426 [inline] kfree+0xfa/0x290 mm/slab.c:3757 skb_free_head+0x6e/0x90 net/core/skbuff.c:590 skb_release_data+0x36d/0x6a0 net/core/skbuff.c:610 skb_release_all+0x3d/0x50 net/core/skbuff.c:664 __kfree_skb net/core/skbuff.c:678 [inline] consume_skb+0xa3/0x290 net/core/skbuff.c:837 skb_free_datagram+0x12/0xc0 net/core/datagram.c:335 netlink_recvmsg+0x5f3/0x1110 net/netlink/af_netlink.c:1997 sock_recvmsg_nosec net/socket.c:886 [inline] sock_recvmsg+0xf4/0x130 net/socket.c:904 ____sys_recvmsg+0x1ba/0x6f0 net/socket.c:2566 ___sys_recvmsg+0xd7/0x140 net/socket.c:2608 __sys_recvmsg+0xd6/0x180 net/socket.c:2642 __do_sys_recvmsg net/socket.c:2652 [inline] __se_sys_recvmsg net/socket.c:2649 [inline] __x64_sys_recvmsg+0x73/0xb0 net/socket.c:2649 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881c612a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3381 bytes inside of 4096-byte region [ffff8881c612a000, ffff8881c612b000) The buggy address belongs to the page: page:ffffea0007184a80 refcount:1 mapcount:0 mapping:ffff8881da002000 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea0007184988 ffffea0007184e88 ffff8881da002000 raw: 0000000000000000 ffff8881c612a000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c612ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c612ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881c612ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881c612ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c612ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================