ntfs3: loop2: Different NTFS' sector size (4096) and media sector size (512)
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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 ffff88807b94839a by task syz-executor.2/16399

CPU: 0 PID: 16399 Comm: syz-executor.2 Not tainted 6.1.0-syzkaller-11674-g84e57d292203 #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: 0033:0x7fc16648c0d9
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:00007fc16710c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc1665abf80 RCX: 00007fc16648c0d9
RDX: 00000000200001c0 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007fc1664e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff33bc4dbf R14: 00007fc16710c300 R15: 0000000000022000
 </TASK>

Allocated by task 16399:
 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 ffff88807b948398
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 2 bytes inside of
 8-byte region [ffff88807b948398, ffff88807b9483a0)

The buggy address belongs to the physical page:
page:ffffea0001ee5200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807b948668 pfn:0x7b948
ksm flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012841280 ffffea0000b19cc0 dead000000000003
raw: ffff88807b948668 000000008066004e 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 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 898, tgid 898 (kworker/0:2), ts 227782434721, free_ts 227775866389
 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+0x9e/0x190 mm/slab_common.c:981
 kmalloc_array include/linux/slab.h:636 [inline]
 kcalloc include/linux/slab.h:667 [inline]
 nsim_fib6_event_init drivers/net/netdevsim/fib.c:810 [inline]
 nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline]
 nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline]
 nsim_fib_event_nb+0x1e5/0xfd0 drivers/net/netdevsim/fib.c:1043
 notifier_call_chain kernel/notifier.c:87 [inline]
 atomic_notifier_call_chain+0x157/0x260 kernel/notifier.c:225
 call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:401 [inline]
 fib6_add_rt2node net/ipv6/ip6_fib.c:1223 [inline]
 fib6_add+0x1c4a/0x3d10 net/ipv6/ip6_fib.c:1477
 __ip6_ins_rt net/ipv6/route.c:1302 [inline]
 ip6_ins_rt+0x12a/0x1b0 net/ipv6/route.c:1312
 __ipv6_ifa_notify+0x56d/0xe20 net/ipv6/addrconf.c:6157
 ipv6_ifa_notify net/ipv6/addrconf.c:6196 [inline]
 addrconf_dad_completed+0x167/0xc80 net/ipv6/addrconf.c:4209
 addrconf_dad_work+0xd61/0x16a0
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
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
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:761 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 seq_open fs/seq_file.c:63 [inline]
 single_open+0x125/0x280 fs/seq_file.c:583
 proc_reg_open+0x23c/0x510 fs/proc/inode.c:532
 do_dentry_open+0x85f/0x11b0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x25ba/0x2dd0 fs/namei.c:3714
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 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:
 ffff88807b948280: fa fc fc fc fc fb fc fc fc fc fb fc fc fc fc fb
 ffff88807b948300: fc fc fc fc fb fc fc fc fc fb fc fc fc fc fb fc
>ffff88807b948380: fc fc fc 02 fc fc fc fc fa fc fc fc fc 05 fc fc
                            ^
 ffff88807b948400: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc
 ffff88807b948480: fc fb fc fc fc fc 00 fc fc fc fc fa fc fc fc fc
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