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BUG: KASAN: use-after-free in vma_start_pgoff mm/interval_tree.c:15 [inline]
BUG: KASAN: use-after-free in avc_start_pgoff mm/interval_tree.c:63 [inline]
BUG: KASAN: use-after-free in __anon_vma_interval_tree_insert mm/interval_tree.c:71 [inline]
BUG: KASAN: use-after-free in anon_vma_interval_tree_insert+0x388/0x570 mm/interval_tree.c:82
Read of size 8 at addr ffff88801ca44500 by task syz-executor.0/4083

CPU: 1 PID: 4083 Comm: syz-executor.0 Not tainted 5.18.0-rc4-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+0x57/0x7d 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
 vma_start_pgoff mm/interval_tree.c:15 [inline]
 avc_start_pgoff mm/interval_tree.c:63 [inline]
 __anon_vma_interval_tree_insert mm/interval_tree.c:71 [inline]
 anon_vma_interval_tree_insert+0x388/0x570 mm/interval_tree.c:82
 anon_vma_interval_tree_post_update_vma mm/mmap.c:436 [inline]
 __vma_adjust+0x70d/0x14c0 mm/mmap.c:828
 vma_merge+0xa57/0x12b0 mm/mmap.c:1101
 userfaultfd_release+0x30c/0x600 fs/userfaultfd.c:883
 __fput+0x1f5/0x8c0 fs/file_table.c:317
 task_work_run+0xc0/0x160 kernel/task_work.c:164
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1ed183bd2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffdcb189be0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1ed183bd2b
RDX: 00007f1ed19a02e8 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f1ed199d960 R08: 0000000000000000 R09: 00007f1ed19a02f0
R10: 00007ffdcb189ce0 R11: 0000000000000293 R12: 0000000000013202
R13: 00007ffdcb189ce0 R14: 00007f1ed199bf60 R15: 0000000000000032
 </TASK>

Allocated by task 4084:
 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_slab_alloc+0x90/0xc0 mm/kasan/common.c:469
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:749 [inline]
 slab_alloc_node mm/slub.c:3217 [inline]
 slab_alloc mm/slub.c:3225 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3232 [inline]
 kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3242
 vm_area_dup+0x83/0x370 kernel/fork.c:467
 copy_vma+0x388/0x810 mm/mmap.c:3018
 move_vma+0x35e/0xdd0 mm/mremap.c:624
 __do_sys_mremap+0x374/0x1130 mm/mremap.c:1056
 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

Freed by task 4084:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
 slab_free mm/slub.c:3510 [inline]
 kmem_cache_free+0xdd/0x5a0 mm/slub.c:3527
 copy_vma+0x637/0x810 mm/mmap.c:3045
 move_vma+0x35e/0xdd0 mm/mremap.c:624
 __do_sys_mremap+0x374/0x1130 mm/mremap.c:1056
 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 ffff88801ca44488
 which belongs to the cache vm_area_struct of size 168
The buggy address is located 120 bytes inside of
 168-byte region [ffff88801ca44488, ffff88801ca44530)

The buggy address belongs to the physical page:
page:ffffea0000729100 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801ca44ae0 pfn:0x1ca44
memcg:ffff88801c57be01
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001de2a40 dead000000000003 ffff888140006b40
raw: ffff88801ca44ae0 000000008011000b 00000001ffffffff ffff88801c57be01
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 3848, tgid 3848 (rm), ts 48020570663, free_ts 48018326510
 prep_new_page mm/page_alloc.c:2431 [inline]
 get_page_from_freelist+0x177d/0x3e60 mm/page_alloc.c:4173
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5402
 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+0x8e1/0xf20 mm/slub.c:3005
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092
 slab_alloc_node mm/slub.c:3183 [inline]
 slab_alloc mm/slub.c:3225 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3232 [inline]
 kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3242
 vm_area_dup+0x83/0x370 kernel/fork.c:467
 __split_vma+0x82/0x470 mm/mmap.c:2460
 mprotect_fixup+0x545/0x7a0 mm/mprotect.c:569
 do_mprotect_pkey+0x400/0x7d0 mm/mprotect.c:733
 __do_sys_mprotect mm/mprotect.c:760 [inline]
 __se_sys_mprotect mm/mprotect.c:757 [inline]
 __x64_sys_mprotect+0x6f/0xb0 mm/mprotect.c:757
 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:1346 [inline]
 free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1396
 free_unref_page_prepare mm/page_alloc.c:3318 [inline]
 free_unref_page_list+0x16f/0xf80 mm/page_alloc.c:3450
 release_pages+0x6f1/0x1780 mm/swap.c:980
 tlb_batch_pages_flush+0x85/0x160 mm/mmu_gather.c:58
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu mm/mmu_gather.c:262 [inline]
 tlb_finish_mmu+0x110/0x6c0 mm/mmu_gather.c:353
 exit_mmap+0x19d/0x510 mm/mmap.c:2911
 __mmput+0xf3/0x440 kernel/fork.c:1195
 exec_mmap fs/exec.c:1038 [inline]
 begin_new_exec+0xda0/0x29e0 fs/exec.c:1297
 load_elf_binary+0xf64/0x4180 fs/binfmt_elf.c:1002
 search_binary_handler fs/exec.c:1730 [inline]
 exec_binprm fs/exec.c:1771 [inline]
 bprm_execve fs/exec.c:1840 [inline]
 bprm_execve+0x669/0x14e0 fs/exec.c:1802
 do_execveat_common+0x5fd/0x7b0 fs/exec.c:1945
 do_execve fs/exec.c:2015 [inline]
 __do_sys_execve fs/exec.c:2091 [inline]
 __se_sys_execve fs/exec.c:2086 [inline]
 __x64_sys_execve+0x8a/0xb0 fs/exec.c:2086
 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

Memory state around the buggy address:
 ffff88801ca44400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
 ffff88801ca44480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801ca44500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb
                   ^
 ffff88801ca44580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801ca44600: fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb fb
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