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BUG: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x78d/0x810 kernel/watch_queue.c:343
Write of size 4 at addr ffff888024613c5c by task syz-executor.0/16894

CPU: 0 PID: 16894 Comm: syz-executor.0 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313
 print_report mm/kasan/report.c:429 [inline]
 kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491
 watch_queue_set_filter+0x78d/0x810 kernel/watch_queue.c:343
 pipe_ioctl+0x25b/0x2b0 fs/pipe.c:637
 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+0x193/0x200 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8d01089049
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d021a0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8d0119bf60 RCX: 00007f8d01089049
RDX: 0000000020000300 RSI: 0000000000005761 RDI: 0000000000000004
RBP: 00007f8d010e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6ab905cf R14: 00007f8d021a0300 R15: 0000000000022000
 </TASK>

Allocated by task 16894:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc mm/kasan/common.c:515 [inline]
 ____kasan_kmalloc mm/kasan/common.c:474 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
 kmalloc include/linux/slab.h:589 [inline]
 kzalloc include/linux/slab.h:717 [inline]
 watch_queue_set_filter+0x2f2/0x810 kernel/watch_queue.c:332
 pipe_ioctl+0x25b/0x2b0 fs/pipe.c:637
 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+0x193/0x200 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888024613c40
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 28 bytes inside of
 32-byte region [ffff888024613c40, ffff888024613c60)

The buggy address belongs to the physical page:
page:ffffea00009184c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24613
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888010c41500
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 3603, tgid 3603 (syz-executor.5), ts 57453064933, free_ts 57440766065
 prep_new_page mm/page_alloc.c:2438 [inline]
 get_page_from_freelist+0xa7f/0x3ec0 mm/page_alloc.c:4182
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5400
 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2268
 alloc_slab_page mm/slub.c:1799 [inline]
 allocate_slab+0x26c/0x3c0 mm/slub.c:1944
 new_slab mm/slub.c:2004 [inline]
 ___slab_alloc+0x8d0/0xf30 mm/slub.c:3018
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
 slab_alloc_node mm/slub.c:3196 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc_trace+0x310/0x3f0 mm/slub.c:3269
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:717 [inline]
 ref_tracker_alloc+0x14c/0x550 lib/ref_tracker.c:85
 netns_tracker_alloc include/net/net_namespace.h:319 [inline]
 get_net_track include/net/net_namespace.h:335 [inline]
 sk_alloc+0x1fa/0xa80 net/core/sock.c:2001
 unix_create1+0xa7/0x950 net/unix/af_unix.c:908
 unix_create+0x110/0x220 net/unix/af_unix.c:975
 __sock_create+0x353/0x790 net/socket.c:1468
 sock_create net/socket.c:1519 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1561
 __do_sys_socket net/socket.c:1570 [inline]
 __se_sys_socket net/socket.c:1568 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1353 [inline]
 free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1403
 free_unref_page_prepare mm/page_alloc.c:3325 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3420
 __vunmap+0x8e8/0xe10 mm/vmalloc.c:2677
 free_work+0x58/0x70 mm/vmalloc.c:97
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff888024613b00: fb fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff888024613b80: 00 00 00 fc fc fc fc fc 00 00 00 00 fc fc fc fc
>ffff888024613c00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
                                                    ^
 ffff888024613c80: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff888024613d00: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc
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