RBP: 00007fee0c30d3c0 R08: 0000000000000000 R09: 0000000000003536 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee0c30d3cc R13: 00007fee0c243210 R14: 0000000000000002 R15: 00007fee0c2da01d ================================================================== 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: 0 PID: 536 Comm: syz-executor879 Not tainted 5.15.131-syzkaller-00653-gea586874d2f9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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 kernel/fork.c:1513 [inline] copy_mm+0xefb/0x13e0 kernel/fork.c:1565 copy_process+0x12bc/0x3260 kernel/fork.c:2256 kernel_clone+0x21e/0x9e0 kernel/fork.c:2654 __do_sys_clone kernel/fork.c:2780 [inline] __se_sys_clone kernel/fork.c:2764 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2764 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: 0033:0x7fee0c2830a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007fee0c243208 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fee0c30d3c8 RCX: 00007fee0c2830a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000c22a000 RBP: 00007fee0c30d3c0 R08: 0000000000000000 R09: 0000000000003536 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee0c30d3cc R13: 00007fee0c243210 R14: 0000000000000002 R15: 00007fee0c2da01d Allocated by task 293: 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 kernel/fork.c:1513 [inline] copy_mm+0x9a1/0x13e0 kernel/fork.c:1565 copy_process+0x12bc/0x3260 kernel/fork.c:2256 kernel_clone+0x21e/0x9e0 kernel/fork.c:2654 __do_sys_clone kernel/fork.c:2780 [inline] __se_sys_clone kernel/fork.c:2764 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2764 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 ffff88811e39bcb8 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88811e39bcb8, ffff88811e39bda0) The buggy address belongs to the page: page:ffffea000478e6c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e39b flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881001bcc00 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 293, ts 20039928153, free_ts 20039781217 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2602 prep_new_page+0x1b/0x110 mm/page_alloc.c:2608 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4482 __alloc_pages+0x206/0x5e0 mm/page_alloc.c:5773 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_alloc+0x24/0x130 kernel/fork.c:359 __install_special_mapping+0x36/0x380 mm/mmap.c:3475 _install_special_mapping+0x3c/0x50 mm/mmap.c:3525 map_vdso+0x175/0x310 arch/x86/entry/vdso/vma.c:268 map_vdso_randomized arch/x86/entry/vdso/vma.c:349 [inline] arch_setup_additional_pages+0x118/0x130 arch/x86/entry/vdso/vma.c:394 load_elf_binary+0x1e12/0x2750 fs/binfmt_elf.c:1264 search_binary_handler fs/exec.c:1739 [inline] exec_binprm fs/exec.c:1780 [inline] bprm_execve+0x7ae/0x14a0 fs/exec.c:1849 do_execveat_common+0x565/0x710 fs/exec.c:1954 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1469 [inline] free_pcp_prepare mm/page_alloc.c:1541 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3531 free_unref_page_list+0x14b/0xa60 mm/page_alloc.c:3668 release_pages+0x1310/0x1370 mm/swap.c:1009 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:320 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338 exit_mmap+0x3ef/0x6f0 mm/mmap.c:3211 __mmput+0x95/0x310 kernel/fork.c:1171 mmput+0x5b/0x170 kernel/fork.c:1194 exec_mmap+0x46b/0x510 fs/exec.c:1041 begin_new_exec+0xbbc/0x1ed0 fs/exec.c:1299 load_elf_binary+0x945/0x2750 fs/binfmt_elf.c:1001 search_binary_handler fs/exec.c:1739 [inline] exec_binprm fs/exec.c:1780 [inline] bprm_execve+0x7ae/0x14a0 fs/exec.c:1849 do_execveat_common+0x565/0x710 fs/exec.c:1954 do_execve fs/exec.c:2024 [inline] __do_sys_execve fs/exec.c:2100 [inline] __se_sys_execve fs/exec.c:2095 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2095 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 Memory state around the buggy address: ffff88811e39bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff88811e39bc80: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 >ffff88811e39bd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811e39bd80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 ffff88811e39be00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================