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BUG: KASAN: slab-out-of-bounds in ntfs_trim_fs+0x710/0x9e0 fs/ntfs3/bitmap.c:1434
Read of size 2 at addr ffff88807c2c2eda by task syz-executor.1/20703

CPU: 1 PID: 20703 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:306
 print_report+0x107/0x1f0 mm/kasan/report.c:417
 kasan_report+0xcd/0x100 mm/kasan/report.c:517
 ntfs_trim_fs+0x710/0x9e0 fs/ntfs3/bitmap.c:1434
 ntfs_ioctl_fitrim fs/ntfs3/file.c:40 [inline]
 ntfs_ioctl+0x2d4/0x3a0 fs/ntfs3/file.c:57
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5b2408c0d9
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:00007f5b24e77168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5b241abf80 RCX: 00007f5b2408c0d9
RDX: 00000000200001c0 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007f5b240e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc60ab626f R14: 00007f5b24e77300 R15: 0000000000022000
 </TASK>

Allocated by task 20703:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:968 [inline]
 __kmalloc+0xaf/0x190 mm/slab_common.c:981
 kmalloc_array include/linux/slab.h:636 [inline]
 kcalloc include/linux/slab.h:667 [inline]
 wnd_init+0x1db/0x310 fs/ntfs3/bitmap.c:664
 ntfs_fill_super+0x31b5/0x4370 fs/ntfs3/super.c:1118
 get_tree_bdev+0x400/0x620 fs/super.c:1282
 vfs_get_tree+0x88/0x270 fs/super.c:1489
 do_new_mount+0x289/0xad0 fs/namespace.c:3145
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88807c2c2ed8
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 2 bytes inside of
 8-byte region [ffff88807c2c2ed8, ffff88807c2c2ee0)

The buggy address belongs to the physical page:
page:ffffea0001f0b080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c2c2
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012841280 ffffea0000afff80 dead000000000002
raw: 0000000000000000 0000000080660066 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 5121, tgid 5121 (syz-executor.4), ts 257337165086, free_ts 257335503965
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549
 alloc_slab_page+0xbd/0x190 mm/slub.c:1851
 allocate_slab+0x5e/0x3c0 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3193
 __slab_alloc mm/slub.c:3292 [inline]
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc_node_track_caller+0x9c/0x190 mm/slab_common.c:988
 kstrdup+0x36/0x70 mm/util.c:61
 kobject_set_name_vargs+0x5d/0x110 lib/kobject.c:257
 dev_set_name+0xc2/0x110 drivers/base/core.c:3267
 netdev_register_kobject+0xb1/0x310 net/core/net-sysfs.c:2002
 register_netdevice+0x1043/0x17a0 net/core/dev.c:10045
 cfg80211_register_netdevice+0x151/0x2e0 net/wireless/core.c:1397
 ieee80211_if_add+0xc24/0x17e0 net/mac80211/iface.c:2196
 ieee80211_register_hw+0x2d50/0x3900 net/mac80211/main.c:1403
 mac80211_hwsim_new_radio+0x2201/0x3c80 drivers/net/wireless/mac80211_hwsim.c:4583
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1446 [inline]
 free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496
 free_unref_page_prepare mm/page_alloc.c:3369 [inline]
 free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464
 __dev_alloc_name net/core/dev.c:1079 [inline]
 dev_alloc_name_ns+0x759/0x860 net/core/dev.c:1101
 ieee80211_if_add+0x1052/0x17e0 net/mac80211/iface.c:2099
 ieee80211_register_hw+0x2d50/0x3900 net/mac80211/main.c:1403
 mac80211_hwsim_new_radio+0x2201/0x3c80 drivers/net/wireless/mac80211_hwsim.c:4583
 hwsim_new_radio_nl+0xc77/0x11e0 drivers/net/wireless/mac80211_hwsim.c:5176
 genl_family_rcv_msg_doit net/netlink/genetlink.c:968 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline]
 genl_rcv_msg+0xc02/0xed0 net/netlink/genetlink.c:1065
 netlink_rcv_skb+0x1f0/0x470 net/netlink/af_netlink.c:2564
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:1076
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1932
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0x46e/0x5f0 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2125
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807c2c2d80: fc fc fc fa fc fc fc fc fb fc fc fc fc fb fc fc
 ffff88807c2c2e00: fc fc 00 fc fc fc fc fb fc fc fc fc fb fc fc fc
>ffff88807c2c2e80: fc fa fc fc fc fc 02 fc fc fc fc 02 fc fc fc fc
                                                    ^
 ffff88807c2c2f00: fb fc fc fc fc fa fc fc fc fc fb fc fc fc fc fa
 ffff88807c2c2f80: fc fc fc fc fb fc fc fc fc fa fc fc fc fc fc fc
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