================================================================== BUG: KASAN: slab-use-after-free in ntfs_write_bh+0x49/0x7b0 fs/ntfs3/fsntfs.c:1401 Read of size 8 at addr ffff888019afa000 by task syz-executor.5/14035 CPU: 0 PID: 14035 Comm: syz-executor.5 Not tainted 6.6.0-rc1-syzkaller #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+0x619/0x1080 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: 0033:0x7f1c0e47cae9 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:00007f1c0f1250c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f1c0e59bf80 RCX: 00007f1c0e47cae9 RDX: 0000000000000000 RSI: 0000000000060142 RDI: 0000000020000000 RBP: 00007f1c0e4c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f1c0e59bf80 R15: 00007ffd7fc3a2b8 Allocated by task 5132: 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_node_track_caller+0xb6/0x230 mm/slab_common.c:1043 kmalloc_reserve+0xf3/0x260 net/core/skbuff.c:581 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x250/0xa90 drivers/net/netdevsim/dev.c:850 process_one_work+0x781/0x1130 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0xabf/0x1060 kernel/workqueue.c:2784 kthread+0x2b8/0x350 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Freed by task 5132: 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 skb_kfree_head net/core/skbuff.c:945 [inline] skb_free_head net/core/skbuff.c:957 [inline] skb_release_data+0x660/0x850 net/core/skbuff.c:987 skb_release_all net/core/skbuff.c:1053 [inline] __kfree_skb net/core/skbuff.c:1067 [inline] consume_skb+0xb3/0x150 net/core/skbuff.c:1283 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x761/0xa90 drivers/net/netdevsim/dev.c:850 process_one_work+0x781/0x1130 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0xabf/0x1060 kernel/workqueue.c:2784 kthread+0x2b8/0x350 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 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+0xc2d/0xff0 kernel/workqueue.c:1799 queue_work_on+0x14f/0x250 kernel/workqueue.c:1834 rcu_do_batch kernel/rcu/tree.c:2139 [inline] rcu_core+0xaaa/0x1740 kernel/rcu/tree.c:2403 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 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 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2767 put_super fs/super.c:433 [inline] deactivate_locked_super+0xe0/0x110 fs/super.c:494 get_tree_bdev+0x434/0x5b0 fs/super.c:1579 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 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 The buggy address belongs to the object at ffff888019afa000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of freed 4096-byte region [ffff888019afa000, ffff888019afb000) The buggy address belongs to the physical page: page:ffffea000066be00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19af8 head:ffffea000066be00 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 ffffea000065f000 dead000000000002 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 3866059615, free_ts 0 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_page_interleave+0x22/0x1d0 mm/mempolicy.c:2131 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+0xade/0x1100 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 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] kobject_uevent_env+0x285/0x8e0 lib/kobject_uevent.c:524 device_add+0x660/0xc90 drivers/base/core.c:3603 tick_init_sysfs+0xfe/0x1c0 kernel/time/clockevents.c:758 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 page_owner free stack trace missing Memory state around the buggy address: ffff888019af9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888019af9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888019afa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888019afa080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888019afa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================