RBP: 00007fd26a1b51d0 R08: 0000000020000280 R09: 0000000020000280 R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffdd973acff R14: 00007fd26a1b5300 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: 0 PID: 22363 Comm: syz-executor.1 Not tainted 5.15.78-syzkaller-00911-gc73b4619ad86 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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: 0033:0x7fd26b4420a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fd26a1b5118 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fd26b561f80 RCX: 00007fd26b4420a9 RDX: 0000000020000180 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fd26a1b51d0 R08: 0000000020000280 R09: 0000000020000280 R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffdd973acff R14: 00007fd26a1b5300 R15: 0000000000022000 Allocated by task 426: 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_alloc+0x24/0x130 kernel/fork.c:359 mmap_region+0xb80/0x1af0 mm/mmap.c:1780 do_mmap+0x785/0xe40 mm/mmap.c:1584 vm_mmap_pgoff+0x1d4/0x420 mm/util.c:554 vm_mmap+0x8d/0xb0 mm/util.c:574 elf_map+0x1b1/0x310 fs/binfmt_elf.c:392 load_elf_binary+0x101c/0x27e0 fs/binfmt_elf.c:1141 search_binary_handler fs/exec.c:1739 [inline] exec_binprm+0x2a8/0xbc0 fs/exec.c:1780 bprm_execve+0x4f0/0x7f0 fs/exec.c:1849 do_execveat_common+0xa92/0xc80 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+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88810c09ecb8 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88810c09ecb8, ffff88810c09eda0) The buggy address belongs to the page: page:ffffea0004302780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c09e flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100274480 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 1, ts 2699182091, free_ts 2694176220 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_alloc+0x24/0x130 kernel/fork.c:359 do_brk_flags+0x739/0xb60 mm/mmap.c:3094 __do_sys_brk+0x61d/0x710 mm/mmap.c:273 __se_sys_brk mm/mmap.c:196 [inline] __x64_sys_brk+0x38/0x40 mm/mmap.c:196 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 __vunmap+0x846/0x980 mm/vmalloc.c:2651 __vfree mm/vmalloc.c:2699 [inline] vfree+0x7f/0xb0 mm/vmalloc.c:2730 sel_write_load+0x235/0x590 security/selinux/selinuxfs.c:667 vfs_write+0x3fd/0x1050 fs/read_write.c:592 ksys_write+0x198/0x2c0 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 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 Memory state around the buggy address: ffff88810c09ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff88810c09ec80: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 >ffff88810c09ed00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88810c09ed80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 ffff88810c09ee00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================