RBP: 00007f5b7d5fe1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe8afc07df R14: 00007f5b7d5fe300 R15: 0000000000022000 ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:167 [inline] BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline] BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline] BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline] BUG: KASAN: use-after-free in kref_put include/linux/kref.h:64 [inline] BUG: KASAN: use-after-free in anon_vma_name_put include/linux/mm_inline.h:343 [inline] BUG: KASAN: use-after-free in free_anon_vma_name include/linux/mm_inline.h:374 [inline] BUG: KASAN: use-after-free in vm_area_free+0x7e/0x230 kernel/fork.c:400 Write of size 4 at addr ffff88810d564be8 by task syz-executor.2/27050 CPU: 1 PID: 27050 Comm: syz-executor.2 Tainted: G W 5.15.74-syzkaller-00001-g4ec71a9ec769 #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 mm/kasan/report.c:435 [inline] kasan_report+0x1a6/0x1f0 mm/kasan/report.c:452 kasan_check_range+0x2aa/0x2e0 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:167 [inline] __refcount_sub_and_test include/linux/refcount.h:272 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] kref_put include/linux/kref.h:64 [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+0x7e/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: 0033:0x7f5b7e88a639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f5b7d5fe118 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f5b7e9aaf80 RCX: 00007f5b7e88a639 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f5b7d5fe1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe8afc07df R14: 00007f5b7d5fe300 R15: 0000000000022000 Allocated by task 26996: 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 Freed by task 27033: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __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] kmem_cache_free+0x11a/0x2e0 mm/slub.c:3531 ____vm_area_free kernel/fork.c:386 [inline] vm_area_free+0x1ae/0x230 kernel/fork.c:412 remove_vma mm/mmap.c:190 [inline] exit_mmap+0x5dd/0x7a0 mm/mmap.c:3205 __mmput+0x95/0x300 kernel/fork.c:1162 mmput+0x50/0x60 kernel/fork.c:1184 exit_mm+0x50d/0x760 kernel/exit.c:504 do_exit+0x63c/0x24d0 kernel/exit.c:815 __do_sys_exit kernel/exit.c:894 [inline] __se_sys_exit kernel/exit.c:892 [inline] __ia32_sys_exit+0x0/0x40 kernel/exit.c:892 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 ffff88810d564b90 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88810d564b90, ffff88810d564c78) The buggy address belongs to the page: page:ffffea0004355900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d564 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100274000 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 23440, ts 2649683670156, free_ts 2649624046343 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 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 ksys_mmap_pgoff+0x15d/0x1e0 mm/mmap.c:1633 __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+0x103/0x120 arch/x86/kernel/sys_x86_64.c:86 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 free_work+0x66/0x90 mm/vmalloc.c:96 process_one_work+0x6db/0xc00 kernel/workqueue.c:2313 worker_thread+0xb3e/0x1340 kernel/workqueue.c:2460 kthread+0x41c/0x500 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Memory state around the buggy address: ffff88810d564a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810d564b00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc >ffff88810d564b80: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810d564c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc ffff88810d564c80: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ==================================================================