RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000001000 RBP: 00007f23b5bfa4a0 R08: 0000000000000000 R09: 0000000000003336 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f23b5b22300 R14: 00007f23b5b22400 R15: 0000000000022000 ================================================================== BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3515 [inline] BUG: KASAN: double-free or invalid-free in kfree+0xc8/0x210 mm/slub.c:4575 CPU: 1 PID: 442 Comm: syz-executor351 Not tainted 5.15.72-syzkaller-04310-g43eb03f7ce81 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3d0 mm/kasan/report.c:256 kasan_report_invalid_free+0x72/0xa0 mm/kasan/report.c:378 ____kasan_slab_free+0x13e/0x160 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1721 [inline] slab_free_freelist_hook+0xc9/0x1a0 mm/slub.c:1747 slab_free mm/slub.c:3515 [inline] kfree+0xc8/0x210 mm/slub.c:4575 anon_vma_name_free+0x15/0x20 mm/madvise.c:88 kref_put include/linux/kref.h:65 [inline] anon_vma_name_put include/linux/mm_inline.h:343 [inline] free_anon_vma_name include/linux/mm_inline.h:374 [inline] vm_area_free+0xa6/0x230 kernel/fork.c:400 dup_mmap+0xbcd/0xea0 kernel/fork.c:671 dup_mm+0x91/0x330 kernel/fork.c:1502 copy_mm+0x108/0x1b0 kernel/fork.c:1554 copy_process+0x1295/0x3250 kernel/fork.c:2245 kernel_clone+0x22d/0x990 kernel/fork.c:2646 __do_sys_clone kernel/fork.c:2772 [inline] __se_sys_clone kernel/fork.c:2756 [inline] __x64_sys_clone+0x289/0x310 kernel/fork.c:2756 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f23b5b71829 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f23b5b222f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f23b5bfa4a8 RCX: 00007f23b5b71829 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000001000 RBP: 00007f23b5bfa4a0 R08: 0000000000000000 R09: 0000000000003336 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f23b5b22300 R14: 00007f23b5b22400 R15: 0000000000022000 Allocated by task 407: 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+0xb2/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook mm/slab.h:550 [inline] slab_alloc_node mm/slub.c:3236 [inline] slab_alloc mm/slub.c:3244 [inline] kmem_cache_alloc+0x189/0x2f0 mm/slub.c:3249 vm_area_dup+0x26/0x1d0 kernel/fork.c:367 dup_mmap+0x6b8/0xea0 kernel/fork.c:591 dup_mm+0x91/0x330 kernel/fork.c:1502 copy_mm+0x108/0x1b0 kernel/fork.c:1554 copy_process+0x1295/0x3250 kernel/fork.c:2245 kernel_clone+0x22d/0x990 kernel/fork.c:2646 __do_sys_clone kernel/fork.c:2772 [inline] __se_sys_clone kernel/fork.c:2756 [inline] __x64_sys_clone+0x289/0x310 kernel/fork.c:2756 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88811eb79de0 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88811eb79de0, ffff88811eb79ec8) The buggy address belongs to the page: page:ffffea00047ade40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11eb79 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100275c80 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 407, ts 19351738209, free_ts 19214197272 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1ab/0x1b0 mm/page_alloc.c:2495 prep_new_page mm/page_alloc.c:2501 [inline] get_page_from_freelist+0x38b/0x400 mm/page_alloc.c:4281 __alloc_pages+0x3a8/0x7c0 mm/page_alloc.c:5548 allocate_slab+0x62/0x580 mm/slub.c:1928 new_slab mm/slub.c:1991 [inline] ___slab_alloc+0x2e2/0x6f0 mm/slub.c:3024 __slab_alloc+0x4a/0x90 mm/slub.c:3111 slab_alloc_node mm/slub.c:3202 [inline] slab_alloc mm/slub.c:3244 [inline] kmem_cache_alloc+0x205/0x2f0 mm/slub.c:3249 vm_area_dup+0x26/0x1d0 kernel/fork.c:367 dup_mmap+0x6b8/0xea0 kernel/fork.c:591 dup_mm+0x91/0x330 kernel/fork.c:1502 copy_mm+0x108/0x1b0 kernel/fork.c:1554 copy_process+0x1295/0x3250 kernel/fork.c:2245 kernel_clone+0x22d/0x990 kernel/fork.c:2646 __do_sys_clone kernel/fork.c:2772 [inline] __se_sys_clone kernel/fork.c:2756 [inline] __x64_sys_clone+0x289/0x310 kernel/fork.c:2756 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1364 [inline] free_pcp_prepare+0x448/0x450 mm/page_alloc.c:1435 free_unref_page_prepare mm/page_alloc.c:3433 [inline] free_unref_page+0x9c/0x370 mm/page_alloc.c:3513 free_the_page mm/page_alloc.c:706 [inline] __free_pages+0xd8/0x100 mm/page_alloc.c:5621 free_pages+0x7c/0x90 mm/page_alloc.c:5632 kasan_depopulate_vmalloc_pte+0x6a/0x90 mm/kasan/shadow.c:354 apply_to_pte_range mm/memory.c:2535 [inline] apply_to_pmd_range mm/memory.c:2579 [inline] apply_to_pud_range mm/memory.c:2615 [inline] apply_to_p4d_range mm/memory.c:2651 [inline] __apply_to_page_range+0x8b8/0xb90 mm/memory.c:2685 apply_to_existing_page_range+0x38/0x50 mm/memory.c:2718 kasan_release_vmalloc+0x9a/0xb0 mm/kasan/shadow.c:464 __purge_vmap_area_lazy+0xc6a/0x1800 mm/vmalloc.c:1715 _vm_unmap_aliases+0x364/0x3e0 mm/vmalloc.c:2118 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:2141 change_page_attr_set_clr+0x2ce/0x6d0 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0xa1/0xe0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:888 [inline] bpf_int_jit_compile+0xb845/0xc090 arch/x86/net/bpf_jit_comp.c:2372 bpf_prog_select_runtime+0x6fd/0xa40 kernel/bpf/core.c:1927 bpf_migrate_filter net/core/filter.c:1296 [inline] bpf_prepare_filter+0x10ca/0x1410 net/core/filter.c:1344 Memory state around the buggy address: ffff88811eb79d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811eb79d80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 >ffff88811eb79e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811eb79e80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88811eb79f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================