================================================================== BUG: KASAN: slab-use-after-free in ntfs_write_bh+0x49/0x7b0 fs/ntfs3/fsntfs.c:1401 Read of size 8 at addr ffff8880693e6000 by task syz-executor.1/15973 CPU: 1 PID: 15973 Comm: syz-executor.1 Not tainted 6.6.0-rc2-syzkaller-00309-g8018e02a8703 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 ntfs_write_bh+0x49/0x7b0 fs/ntfs3/fsntfs.c:1401 mi_write+0x9b/0x200 fs/ntfs3/record.c:346 ni_write_inode+0x612/0x1070 fs/ntfs3/frecord.c:3360 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x69b/0xfa0 fs/fs-writeback.c:1668 writeback_single_inode+0x21b/0x790 fs/fs-writeback.c:1724 sync_inode_metadata+0xcc/0x130 fs/fs-writeback.c:2786 ntfs_set_state+0x556/0x730 fs/ntfs3/fsntfs.c:995 ntfs_create_inode+0x502/0x3b00 fs/ntfs3/inode.c:1307 ntfs_atomic_open+0x423/0x570 fs/ntfs3/namei.c:422 atomic_open fs/namei.c:3358 [inline] lookup_open fs/namei.c:3466 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0x1044/0x3180 fs/namei.c:3793 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_open fs/open.c:1445 [inline] __se_sys_open fs/open.c:1441 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdfd907cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdfd9d7f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fdfd919bf80 RCX: 00007fdfd907cae9 RDX: 0000000000000000 RSI: 0000000000064842 RDI: 00000000200005c0 RBP: 00007fdfd90c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdfd919bf80 R15: 00007ffe30441828 Allocated by task 5290: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc+0xb9/0x230 mm/slab_common.c:1036 kmalloc include/linux/slab.h:603 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x63/0xa0 security/security.c:2836 do_dentry_open+0x325/0x1430 fs/open.c:916 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5290: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822 tomoyo_realpath_from_path+0x5a3/0x5e0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x63/0xa0 security/security.c:2836 do_dentry_open+0x325/0x1430 fs/open.c:916 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2767 call_rcu_hurry include/linux/rcupdate.h:117 [inline] rcu_sync_call kernel/rcu/sync.c:47 [inline] rcu_sync_exit+0xcf/0x1b0 kernel/rcu/sync.c:177 ext4_writepages_up_write fs/ext4/ext4.h:1774 [inline] ext4_ind_migrate+0x6de/0x8d0 fs/ext4/migrate.c:669 ext4_ioctl_setflags fs/ext4/ioctl.c:695 [inline] ext4_fileattr_set+0xe60/0x16e0 fs/ext4/ioctl.c:1012 vfs_fileattr_set+0x8f7/0xd40 fs/ioctl.c:697 ioctl_setflags fs/ioctl.c:729 [inline] do_vfs_ioctl+0x1e77/0x2b40 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 insert_work+0x3e/0x320 kernel/workqueue.c:1647 __queue_work+0xc06/0x1010 kernel/workqueue.c:1799 queue_work_on+0x14f/0x250 kernel/workqueue.c:1834 rcu_do_batch kernel/rcu/tree.c:2139 [inline] rcu_core+0xacf/0x1790 kernel/rcu/tree.c:2403 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 The buggy address belongs to the object at ffff8880693e6000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of freed 4096-byte region [ffff8880693e6000, ffff8880693e7000) The buggy address belongs to the physical page: page:ffffea0001a4f800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x693e0 head:ffffea0001a4f800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012842140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 13211, tgid 13210 (syz-executor.1), ts 1788057696320, free_ts 1788033002247 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1022 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:1036 kmalloc include/linux/slab.h:603 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_mount_acl security/tomoyo/mount.c:105 [inline] tomoyo_mount_permission+0x3bc/0xb80 security/tomoyo/mount.c:237 security_sb_mount+0x8c/0xc0 security/security.c:1375 path_mount+0xb9/0xfa0 fs/namespace.c:3604 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 napi_frag_unref include/linux/skbuff.h:3450 [inline] skb_release_data+0x446/0x850 net/core/skbuff.c:981 skb_release_all net/core/skbuff.c:1053 [inline] __kfree_skb+0x57/0x70 net/core/skbuff.c:1067 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3338 [inline] tcp_ack+0x2346/0x6d50 net/ipv4/tcp_input.c:3894 tcp_rcv_established+0x1008/0x1f80 net/ipv4/tcp_input.c:5949 tcp_v4_do_rcv+0x6bd/0xb50 net/ipv4/tcp_ipv4.c:1728 sk_backlog_rcv include/net/sock.h:1121 [inline] __release_sock+0x19c/0x4b0 net/core/sock.c:2983 release_sock+0x61/0x1c0 net/core/sock.c:3520 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1337 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] sock_write_iter+0x39a/0x520 net/socket.c:1141 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x782/0xaf0 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880693e5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880693e5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880693e6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880693e6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880693e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================