================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_trim_fs+0x84f/0x950 fs/ntfs3/bitmap.c:1434 Read of size 2 at addr ffff88807dcf8242 by task syz-executor.0/16050 CPU: 1 PID: 16050 Comm: syz-executor.0 Not tainted 6.1.0-rc8-syzkaller-00018-g479174d402bc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x461 mm/kasan/report.c:395 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495 ntfs_trim_fs+0x84f/0x950 fs/ntfs3/bitmap.c:1434 ntfs_ioctl_fitrim+0x23e/0x340 fs/ntfs3/file.c:40 ntfs_ioctl+0xa0/0xe0 fs/ntfs3/file.c:57 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9cc0a8c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9cc1846168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9cc0babf80 RCX: 00007f9cc0a8c0d9 RDX: 0000000020000000 RSI: 00000000c0185879 RDI: 0000000000000004 RBP: 00007f9cc0ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb9c9653f R14: 00007f9cc1846300 R15: 0000000000022000 Allocated by task 16050: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0x5a/0xd0 mm/slab_common.c:968 kmalloc_array include/linux/slab.h:605 [inline] kcalloc include/linux/slab.h:636 [inline] wnd_init+0x2ff/0x460 fs/ntfs3/bitmap.c:664 ntfs_fill_super+0x2696/0x37f0 fs/ntfs3/super.c:1118 get_tree_bdev+0x444/0x760 fs/super.c:1324 vfs_get_tree+0x8d/0x2f0 fs/super.c:1531 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807dcf8240 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 2 bytes inside of 32-byte region [ffff88807dcf8240, ffff88807dcf8260) The buggy address belongs to the physical page: page:ffffea0001f73e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807dcf8fc1 pfn:0x7dcf8 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000893908 ffffea0001f15dc8 ffff888012040100 raw: ffff88807dcf8fc1 ffff88807dcf8000 000000010000001b 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x342220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 6162, tgid 6155 (syz-executor.0), ts 323404522340, free_ts 323310794721 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4291 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5558 __alloc_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x94/0x390 mm/slab.c:2570 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943 ____cache_alloc mm/slab.c:3019 [inline] ____cache_alloc mm/slab.c:3002 [inline] __do_cache_alloc mm/slab.c:3202 [inline] slab_alloc_node mm/slab.c:3250 [inline] __kmem_cache_alloc_node+0x44a/0x510 mm/slab.c:3549 kmalloc_trace+0x26/0x60 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] ref_tracker_alloc+0x150/0x550 lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:3995 [inline] netdev_hold include/linux/netdevice.h:4024 [inline] dst_init+0xe4/0x520 net/core/dst.c:52 dst_alloc+0x16f/0x1f0 net/core/dst.c:96 rt_dst_alloc+0x55/0x430 net/ipv4/route.c:1633 __mkroute_output net/ipv4/route.c:2592 [inline] ip_route_output_key_hash_rcu+0x899/0x2bc0 net/ipv4/route.c:2814 ip_route_output_key_hash+0x18f/0x300 net/ipv4/route.c:2643 __ip_route_output_key include/net/route.h:140 [inline] ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2873 udp_sendmsg+0x1967/0x2750 net/ipv4/udp.c:1224 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:827 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483 slab_destroy mm/slab.c:1615 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1635 cache_flusharray mm/slab.c:3360 [inline] ___cache_free+0x2ac/0x3d0 mm/slab.c:3423 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slab.c:3257 [inline] __kmem_cache_alloc_node+0x266/0x510 mm/slab.c:3549 kmalloc_trace+0x26/0x60 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] gro_cells_destroy net/core/gro_cells.c:125 [inline] gro_cells_destroy+0x26b/0x470 net/core/gro_cells.c:105 ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:1013 netdev_run_todo+0x6bf/0x1100 net/core/dev.c:10362 ip_tunnel_delete_nets+0x3a8/0x5c0 net/ipv4/ip_tunnel.c:1127 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb00 net/core/net_namespace.c:601 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 Memory state around the buggy address: ffff88807dcf8100: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88807dcf8180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88807dcf8200: fa fb fb fb fc fc fc fc 02 fc fc fc fc fc fc fc ^ ffff88807dcf8280: fa fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88807dcf8300: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================