RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001802200 RBP: 00007f72cc11a120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 R13: 000000000000000b R14: 00007f72cc6c6f80 R15: 00007ffdab7710e8 ================================================================== BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3526 [inline] BUG: KASAN: double-free or invalid-free in kfree+0xc4/0x270 mm/slub.c:4588 CPU: 0 PID: 384 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 kasan_report_invalid_free+0x58/0x90 mm/kasan/report.c:370 ____kasan_slab_free+0x13d/0x160 mm/kasan/common.c:-1 __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:1728 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kfree+0xc4/0x270 mm/slub.c:4588 anon_vma_name_free+0x15/0x20 mm/madvise.c:91 kref_put include/linux/kref.h:65 [inline] anon_vma_name_put include/linux/mm_inline.h:375 [inline] free_anon_vma_name include/linux/mm_inline.h:406 [inline] vm_area_free_no_check+0xa9/0x140 kernel/fork.c:406 vm_area_free kernel/fork.c:419 [inline] dup_mmap kernel/fork.c:682 [inline] dup_mm kernel/fork.c:1522 [inline] copy_mm+0xe90/0x13c0 kernel/fork.c:1574 copy_process+0x117c/0x3250 kernel/fork.c:2348 kernel_clone+0x233/0x960 kernel/fork.c:2737 __do_sys_clone kernel/fork.c:2863 [inline] __se_sys_clone kernel/fork.c:2847 [inline] __x64_sys_clone+0x198/0x210 kernel/fork.c:2847 x64_sys_call+0x41f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:57 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f72cc587ef9 Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f72cc11a068 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f72cc6c6f80 RCX: 00007f72cc587ef9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001802200 RBP: 00007f72cc11a120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 R13: 000000000000000b R14: 00007f72cc6c6f80 R15: 00007ffdab7710e8 Allocated by task 330: 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+0xbd/0xf0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260 vm_area_alloc+0x24/0x130 kernel/fork.c:360 __mmap_region mm/mmap.c:1794 [inline] mmap_region+0xaa6/0x1710 mm/mmap.c:2959 do_mmap+0x812/0xf10 mm/mmap.c:1598 vm_mmap_pgoff+0x1ec/0x430 mm/util.c:555 vm_mmap+0x87/0xb0 mm/util.c:575 elf_map+0x190/0x230 fs/binfmt_elf.c:392 load_elf_binary+0x1092/0x28e0 fs/binfmt_elf.c:1141 search_binary_handler fs/exec.c:1755 [inline] exec_binprm fs/exec.c:1796 [inline] bprm_execve+0x7af/0x1490 fs/exec.c:1865 do_execveat_common+0x923/0xa80 fs/exec.c:1970 do_execve fs/exec.c:2040 [inline] __do_sys_execve fs/exec.c:2116 [inline] __se_sys_execve fs/exec.c:2111 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2111 x64_sys_call+0x919/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:60 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888124a4cde0 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff888124a4cde0, ffff888124a4cec8) The buggy address belongs to the page: page:ffffea0004929300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x124a4c flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100186c00 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 320, ts 39512678841, free_ts 33537907551 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2d3a/0x2dc0 mm/page_alloc.c:4485 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0x138/0x260 mm/slub.c:3260 vm_area_dup+0x26/0x210 kernel/fork.c:368 __split_vma+0xac/0x3e0 mm/mmap.c:2753 __do_munmap+0x43e/0x1020 mm/mmap.c:2891 do_munmap mm/mmap.c:2936 [inline] munmap_vma_range mm/mmap.c:606 [inline] __mmap_region mm/mmap.c:1769 [inline] mmap_region+0x91e/0x1710 mm/mmap.c:2959 do_mmap+0x812/0xf10 mm/mmap.c:1598 vm_mmap_pgoff+0x1ec/0x430 mm/util.c:555 ksys_mmap_pgoff+0xf6/0x1d0 mm/mmap.c:1647 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __x64_sys_mmap+0xfa/0x110 arch/x86/kernel/sys_x86_64.c:86 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xae/0x540 mm/page_alloc.c:3616 __put_single_page mm/swap.c:98 [inline] __put_page+0xad/0xe0 mm/swap.c:129 put_page include/linux/mm.h:1306 [inline] anon_pipe_buf_release+0x183/0x200 fs/pipe.c:137 pipe_buf_release include/linux/pipe_fs_i.h:219 [inline] pipe_read+0x53b/0x1010 fs/pipe.c:323 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x6c9/0xc40 fs/read_write.c:485 ksys_read+0x149/0x250 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:631 x64_sys_call+0x96d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888124a4cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888124a4cd80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 >ffff888124a4ce00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888124a4ce80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff888124a4cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================