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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 ffff88802426c05c by task syz-executor.1/6902

CPU: 1 PID: 6902 Comm: syz-executor.1 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: 0033:0x7f5f35489049
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:00007f5f365ad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5f3559bf60 RCX: 00007f5f35489049
RDX: 0000000020000040 RSI: 0000000000005761 RDI: 0000000000000005
RBP: 00007f5f354e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0c08cd0f R14: 00007f5f365ad300 R15: 0000000000022000
 </TASK>

Allocated by task 6902:
 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 ffff88802426c040
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 28 bytes inside of
 32-byte region [ffff88802426c040, ffff88802426c060)

The buggy address belongs to the physical page:
page:ffffea0000909b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2426c
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000924a40 dead000000000002 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 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 2952, tgid 2952 (rcS), ts 13721638693, free_ts 12707448006
 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]
 __kmalloc+0x318/0x350 mm/slub.c:4434
 kmalloc include/linux/slab.h:589 [inline]
 kzalloc include/linux/slab.h:717 [inline]
 tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45
 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline]
 tomoyo_encode+0x28/0x50 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x186/0x620 security/tomoyo/realpath.c:288
 tomoyo_init_log+0xbe2/0x1ed0 security/tomoyo/audit.c:263
 tomoyo_supervisor+0x34d/0xf00 security/tomoyo/common.c:2088
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_execute_permission+0x37f/0x4a0 security/tomoyo/file.c:619
 tomoyo_find_next_domain+0x348/0x1f80 security/tomoyo/domain.c:752
 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline]
 tomoyo_bprm_check_security+0x121/0x1a0 security/tomoyo/tomoyo.c:91
 security_bprm_check+0x45/0xa0 security/security.c:866
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
 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:359
 apply_to_pte_range mm/memory.c:2547 [inline]
 apply_to_pmd_range mm/memory.c:2591 [inline]
 apply_to_pud_range mm/memory.c:2627 [inline]
 apply_to_p4d_range mm/memory.c:2663 [inline]
 __apply_to_page_range+0x686/0x1030 mm/memory.c:2697
 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:469
 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1735
 _vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2140
 _vm_unmap_aliases mm/vmalloc.c:2114 [inline]
 vm_unmap_aliases+0x45/0x50 mm/vmalloc.c:2163
 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1743
 change_page_attr_set arch/x86/mm/pat/set_memory.c:1793 [inline]
 set_memory_nx+0xb2/0x110 arch/x86/mm/pat/set_memory.c:1941
 free_init_pages+0x73/0xc0 arch/x86/mm/init.c:898
 kernel_init+0x2e/0x1d0 init/main.c:1516
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff88802426bf00: 00 00 00 00 fc fc 00 00 00 00 fc fc 00 00 00 00
 ffff88802426bf80: fc fc 00 00 00 00 fc fc 00 00 00 00 fc fc fc fc
>ffff88802426c000: 00 00 00 00 fc fc fc fc 00 00 00 fc fc fc fc fc
                                                    ^
 ffff88802426c080: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff88802426c100: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc
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