================================================================== BUG: KASAN: slab-use-after-free in is_vm_hugetlb_page include/linux/hugetlb_inline.h:11 [inline] BUG: KASAN: slab-use-after-free in vma_resv_map mm/hugetlb.c:1150 [inline] BUG: KASAN: slab-use-after-free in __vma_reservation_common+0xc9/0x7d0 mm/hugetlb.c:2807 Read of size 8 at addr ffff888024f834f8 by task syz-executor.1/5730 CPU: 1 PID: 5730 Comm: syz-executor.1 Not tainted 6.9.0-rc3-next-20240412-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 is_vm_hugetlb_page include/linux/hugetlb_inline.h:11 [inline] vma_resv_map mm/hugetlb.c:1150 [inline] __vma_reservation_common+0xc9/0x7d0 mm/hugetlb.c:2807 vma_needs_reservation mm/hugetlb.c:2881 [inline] restore_reserve_on_error+0x39/0x1d0 mm/hugetlb.c:2931 hugetlb_no_page mm/hugetlb.c:6391 [inline] hugetlb_fault+0x1ae1/0x3910 mm/hugetlb.c:6487 handle_mm_fault+0x18e8/0x1bb0 mm/memory.c:5701 do_user_addr_fault arch/x86/mm/fault.c:1368 [inline] handle_page_fault arch/x86/mm/fault.c:1511 [inline] exc_page_fault+0x459/0x900 arch/x86/mm/fault.c:1569 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7ff4f5829681 Code: 39 c6 7e 57 4c 8b 5f 20 48 8b 57 28 eb 06 0f 1f 00 4c 89 c2 49 39 d3 74 47 4c 8b 57 18 4c 8d 42 01 89 c1 83 c0 08 4c 89 47 28 <41> 0f b6 14 12 89 47 34 48 d3 e2 49 09 d1 39 f0 7c d5 44 89 ca 29 RSP: 002b:00007ff4f6502578 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 00007ff4f6502eb8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ff4f6502670 RBP: 00007ff4f6502670 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020001602 R11: 000000000000609f R12: 0000000000000003 R13: 00007ff4f6502f80 R14: 00007ff4f6502f40 R15: 00007ff4eb600000 Allocated by task 5729: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3897 [inline] slab_alloc_node mm/slub.c:3957 [inline] kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964 vm_area_alloc+0x24/0x1d0 kernel/fork.c:467 mmap_region+0xc20/0x2030 mm/mmap.c:2852 do_mmap+0x8ad/0xfa0 mm/mmap.c:1387 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573 ksys_mmap_pgoff+0x544/0x720 mm/mmap.c:1433 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5730: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2190 [inline] slab_free mm/slub.c:4393 [inline] kmem_cache_free+0x145/0x340 mm/slub.c:4468 rcu_do_batch kernel/rcu/tree.c:2565 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2839 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3102 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3206 remove_vma mm/mmap.c:148 [inline] remove_mt mm/mmap.c:2334 [inline] do_vmi_align_munmap+0x155c/0x18c0 mm/mmap.c:2677 do_vmi_munmap+0x24e/0x2d0 mm/mmap.c:2741 mmap_region+0x729/0x2030 mm/mmap.c:2792 do_mmap+0x8ad/0xfa0 mm/mmap.c:1387 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573 ksys_mmap_pgoff+0x544/0x720 mm/mmap.c:1433 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888024f834d8 which belongs to the cache vm_area_struct of size 184 The buggy address is located 32 bytes inside of freed 184-byte region [ffff888024f834d8, ffff888024f83590) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24f83 memcg:ffff8880605c4a01 ksm flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000000 ffff8880162a7b40 ffffea0000b86180 dead000000000003 raw: 0000000000000000 0000000080100010 00000001ffffefff ffff8880605c4a01 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 4540, tgid -1364370787 (udevd), ts 4540, free_ts 58958732860 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1474 prep_new_page mm/page_alloc.c:1482 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3444 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2259 allocate_slab+0x5a/0x2e0 mm/slub.c:2422 new_slab mm/slub.c:2475 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624 __slab_alloc+0x58/0xa0 mm/slub.c:3714 __slab_alloc_node mm/slub.c:3767 [inline] slab_alloc_node mm/slub.c:3945 [inline] kmem_cache_alloc_noprof+0x1c1/0x290 mm/slub.c:3964 vm_area_dup+0x27/0x290 kernel/fork.c:482 dup_mmap kernel/fork.c:697 [inline] dup_mm kernel/fork.c:1688 [inline] copy_mm+0xcf5/0x1fb0 kernel/fork.c:1737 copy_process+0x187a/0x3dc0 kernel/fork.c:2390 kernel_clone+0x226/0x8f0 kernel/fork.c:2797 __do_sys_clone kernel/fork.c:2940 [inline] __se_sys_clone kernel/fork.c:2924 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 1151 tgid 1151 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2607 vfree+0x186/0x2e0 mm/vmalloc.c:3338 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3259 process_one_work kernel/workqueue.c:3218 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299 worker_thread+0x86d/0xd70 kernel/workqueue.c:3380 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888024f83380: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb ffff888024f83400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888024f83480: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb ^ ffff888024f83500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888024f83580: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb ==================================================================