fuse: Unknown parameter 'f5Tp1ɀE' ================================================================== BUG: KASAN: use-after-free in dtMoveEntry fs/jfs/jfs_dtree.c:3934 [inline] BUG: KASAN: use-after-free in dtSplitPage+0x1e37/0x3b20 fs/jfs/jfs_dtree.c:1561 Write of size 1 at addr ffff888033e76000 by task syz.1.36/6170 CPU: 1 UID: 0 PID: 6170 Comm: syz.1.36 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 dtMoveEntry fs/jfs/jfs_dtree.c:3934 [inline] dtSplitPage+0x1e37/0x3b20 fs/jfs/jfs_dtree.c:1561 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x109b/0x5f40 fs/jfs/jfs_dtree.c:871 jfs_create+0x6c8/0xa80 fs/jfs/namei.c:137 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x1500/0x3840 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a9ad1efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7a98f7e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f7a9af75fa0 RCX: 00007f7a9ad1efc9 RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000200000000100 RBP: 00007f7a9ada1f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7a9af76038 R14: 00007f7a9af75fa0 R15: 00007ffeec3c2a38 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x2f pfn:0x33e76 flags: 0x80000000000000(node=0|zone=1) page_type: f0(buddy) raw: 0080000000000000 ffffea000085c408 ffffea0000e69008 0000000000000000 raw: 000000000000002f 0000000000000001 00000000f0000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOWARN), pid 5993, tgid 5993 (syz.2.13), ts 101045479406, free_ts 101242051909 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xcf/0x1e0 mm/mempolicy.c:2507 vm_area_alloc_pages mm/vmalloc.c:3647 [inline] __vmalloc_area_node mm/vmalloc.c:3724 [inline] __vmalloc_node_range_noprof+0x96c/0x12d0 mm/vmalloc.c:3897 __vmalloc_node_noprof+0xc2/0x110 mm/vmalloc.c:3960 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct+0x3d4/0x830 kernel/fork.c:881 copy_process+0x545/0x3ae0 kernel/fork.c:2012 kernel_clone+0x224/0x7c0 kernel/fork.c:2609 __do_sys_clone3 kernel/fork.c:2911 [inline] __se_sys_clone3+0x256/0x2d0 kernel/fork.c:2890 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 993 tgid 993 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xfb6/0x1140 mm/page_alloc.c:2906 vfree+0x2ad/0x470 mm/vmalloc.c:3440 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3359 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888033e75f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888033e75f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888033e76000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888033e76080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888033e76100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================