RSP: 002b:00007fed6d3c3048 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fed6d411789 RDX: 00007fed6d3c3060 RSI: 0000000000000058 RDI: 00007fed6d3c3060 RBP: 0000000000000002 R08: 00007fed6d3c2de6 R09: 0000000000003337 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed6d49c1ac R13: 000000000000000b R14: 00007fff9d51d290 R15: 00007fff9d51d378 ================================================================== BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3519 [inline] BUG: KASAN: double-free or invalid-free in kfree+0xc8/0x220 mm/slub.c:4579 CPU: 1 PID: 436 Comm: syz-executor238 Not tainted 5.15.122-syzkaller-00676-g1463976ddc64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 kasan_report_invalid_free+0x6b/0xa0 mm/kasan/report.c:370 ____kasan_slab_free+0x13e/0x160 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kfree+0xc8/0x220 mm/slub.c:4579 anon_vma_name_free+0x15/0x20 mm/madvise.c:90 kref_put include/linux/kref.h:65 [inline] anon_vma_name_put include/linux/mm_inline.h:365 [inline] free_anon_vma_name include/linux/mm_inline.h:396 [inline] vm_area_free_no_check+0xa6/0x130 kernel/fork.c:405 vm_area_free kernel/fork.c:418 [inline] dup_mmap kernel/fork.c:681 [inline] dup_mm+0xd73/0x12c0 kernel/fork.c:1513 copy_mm+0x107/0x1b0 kernel/fork.c:1565 copy_process+0x12bc/0x3260 kernel/fork.c:2256 kernel_clone+0x21e/0x9e0 kernel/fork.c:2659 __do_sys_clone3 kernel/fork.c:2943 [inline] __se_sys_clone3 kernel/fork.c:2927 [inline] __x64_sys_clone3+0x376/0x3a0 kernel/fork.c:2927 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fed6d411789 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fed6d3c3048 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fed6d411789 RDX: 00007fed6d3c3060 RSI: 0000000000000058 RDI: 00007fed6d3c3060 RBP: 0000000000000002 R08: 00007fed6d3c2de6 R09: 0000000000003337 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed6d49c1ac R13: 000000000000000b R14: 00007fff9d51d290 R15: 00007fff9d51d378 Allocated by task 313: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 vm_area_dup+0x26/0x230 kernel/fork.c:367 dup_mmap kernel/fork.c:601 [inline] dup_mm+0x81b/0x12c0 kernel/fork.c:1513 copy_mm+0x107/0x1b0 kernel/fork.c:1565 copy_process+0x12bc/0x3260 kernel/fork.c:2256 kernel_clone+0x21e/0x9e0 kernel/fork.c:2659 __do_sys_clone kernel/fork.c:2785 [inline] __se_sys_clone kernel/fork.c:2769 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2769 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88811dcfbb90 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88811dcfbb90, ffff88811dcfbc78) The buggy address belongs to the page: page:ffffea0004773ec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dcfb flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881001b5200 raw: 0000000000000000 00000000000d000d 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 313, ts 48493757922, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2600 prep_new_page mm/page_alloc.c:2606 [inline] get_page_from_freelist+0x2ed2/0x2f90 mm/page_alloc.c:4474 __alloc_pages+0x206/0x5e0 mm/page_alloc.c:5765 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0x134/0x200 mm/slub.c:3253 vm_area_dup+0x26/0x230 kernel/fork.c:367 dup_mmap kernel/fork.c:601 [inline] dup_mm+0x81b/0x12c0 kernel/fork.c:1513 copy_mm+0x107/0x1b0 kernel/fork.c:1565 copy_process+0x12bc/0x3260 kernel/fork.c:2256 kernel_clone+0x21e/0x9e0 kernel/fork.c:2659 __do_sys_clone kernel/fork.c:2785 [inline] __se_sys_clone kernel/fork.c:2769 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2769 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page_owner free stack trace missing Memory state around the buggy address: ffff88811dcfba80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811dcfbb00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff88811dcfbb80: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811dcfbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff88811dcfbc80: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ==================================================================