==================================================================
BUG: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x66a/0x700 kernel/watch_queue.c:343
Write of size 4 at addr ffff88801376589c by task syz-executor682/5889

CPU: 1 PID: 5889 Comm: syz-executor682 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x9a/0xcc lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 watch_queue_set_filter+0x66a/0x700 kernel/watch_queue.c:343
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f22c38c3b79
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc3484df88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f22c38c3b79
RDX: 0000000020000300 RSI: 0000000000005761 RDI: 0000000000000004
RBP: 00007f22c3887d20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f22c3887db0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 5889:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:682 [inline]
 watch_queue_set_filter+0x1f3/0x700 kernel/watch_queue.c:332
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff888013765880
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 28 bytes inside of
 32-byte region [ffff888013765880, ffff8880137658a0)
The buggy address belongs to the page:
page:00000000d90de0a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13765
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea00005a7740 0000001400000014 ffff88800f441a00
raw: 0000000000000000 0000000080400040 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1813037639
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x144/0x1c0 mm/page_alloc.c:2297
 prep_new_page mm/page_alloc.c:2306 [inline]
 get_page_from_freelist+0x1c6e/0x3f80 mm/page_alloc.c:3945
 __alloc_pages_nodemask+0x2d6/0x730 mm/page_alloc.c:4995
 __alloc_pages include/linux/gfp.h:511 [inline]
 alloc_page_interleave+0xf/0x190 mm/mempolicy.c:2133
 alloc_pages include/linux/gfp.h:547 [inline]
 alloc_slab_page mm/slub.c:1618 [inline]
 allocate_slab+0x2b6/0x4a0 mm/slub.c:1758
 new_slab mm/slub.c:1821 [inline]
 new_slab_objects mm/slub.c:2578 [inline]
 ___slab_alloc+0x476/0x790 mm/slub.c:2741
 __slab_alloc.constprop.0+0x95/0xe0 mm/slub.c:2781
 slab_alloc_node mm/slub.c:2857 [inline]
 slab_alloc mm/slub.c:2900 [inline]
 __kmalloc+0x34a/0x3e0 mm/slub.c:3981
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:682 [inline]
 kobject_get_path+0x97/0x1f0 lib/kobject.c:179
 kobject_uevent_env+0x1f3/0x12c0 lib/kobject_uevent.c:528
 device_add+0x941/0x1ad0 drivers/base/core.c:3090
 register_memory drivers/base/memory.c:560 [inline]
 init_memory_block+0x2aa/0x400 drivers/base/memory.c:595
 add_memory_block drivers/base/memory.c:612 [inline]
 memory_dev_init+0x14a/0x1a8 drivers/base/memory.c:748
 driver_init+0x2d/0x32 drivers/base/init.c:36
 do_basic_setup init/main.c:1328 [inline]
 kernel_init_freeable+0x380/0x5ca init/main.c:1533
 kernel_init+0x8/0x108 init/main.c:1421
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888013765780: fa fb fb fb fc fc fc fc 00 00 00 03 fc fc fc fc
 ffff888013765800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
>ffff888013765880: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc
                            ^
 ffff888013765900: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc
 ffff888013765980: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
==================================================================