================================================================== BUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode+0x17c/0x650 fs/ocfs2/sysfile.c:102 Read of size 8 at addr ffff0000e1cbb910 by task syz-executor/6665 CPU: 0 UID: 0 PID: 6665 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 ocfs2_get_system_file_inode+0x17c/0x650 fs/ocfs2/sysfile.c:102 ocfs2_remove_inode fs/ocfs2/inode.c:723 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x12e8/0x3bf8 fs/ocfs2/inode.c:1292 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4474 do_rmdir+0x214/0x4c4 fs/namei.c:4516 __do_sys_unlinkat fs/namei.c:4690 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 6736: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:330 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4236 vm_area_dup+0x34/0x50c mm/vma_init.c:122 dup_mmap+0x778/0x16b4 mm/mmap.c:1780 dup_mm kernel/fork.c:1485 [inline] copy_mm+0x100/0x438 kernel/fork.c:1537 copy_process+0x1520/0x31ec kernel/fork.c:2175 kernel_clone+0x1d8/0x84c kernel/fork.c:2605 __do_sys_clone kernel/fork.c:2748 [inline] __se_sys_clone kernel/fork.c:2716 [inline] __arm64_sys_clone+0x144/0x1a0 kernel/fork.c:2716 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Freed by task 2054: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x74/0x98 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free_after_rcu_debug+0x11c/0x2f4 mm/slub.c:4730 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0x840/0x17d0 kernel/rcu/tree.c:2861 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2878 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:47 kasan_record_aux_stack+0xb0/0xc8 mm/kasan/generic.c:548 slab_free_hook mm/slub.c:2378 [inline] slab_free mm/slub.c:4680 [inline] kmem_cache_free+0x354/0x550 mm/slub.c:4782 vm_area_free+0x108/0x17c mm/vma_init.c:150 remove_vma+0x120/0x138 mm/vma.c:468 exit_mmap+0x414/0xabc mm/mmap.c:1305 __mmput+0xec/0x3f4 kernel/fork.c:1130 mmput+0x70/0xac kernel/fork.c:1152 exec_mmap+0x534/0x654 fs/exec.c:901 begin_new_exec+0x690/0x11d0 fs/exec.c:1156 load_elf_binary+0x6d8/0x1de4 fs/binfmt_elf.c:995 search_binary_handler fs/exec.c:1670 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve+0x788/0x1104 fs/exec.c:1754 do_execveat_common+0x6ac/0x834 fs/exec.c:1860 do_execve fs/exec.c:1934 [inline] __do_sys_execve fs/exec.c:2010 [inline] __se_sys_execve fs/exec.c:2005 [inline] __arm64_sys_execve+0x9c/0xb4 fs/exec.c:2005 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000e1cbb8c0 which belongs to the cache vm_area_struct of size 256 The buggy address is located 80 bytes inside of freed 256-byte region [ffff0000e1cbb8c0, ffff0000e1cbb9c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121cbb memcg:ffff0000c22b0901 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c18adb40 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000000f5000000 ffff0000c22b0901 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e1cbb800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e1cbb880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff0000e1cbb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000e1cbb980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff0000e1cbba00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Unable to handle kernel paging request at virtual address dfff80020000000c KASAN: probably user-memory-access in range [0x0000001000000060-0x0000001000000067] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff80020000000c] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 6665 Comm: syz-executor Tainted: G B 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] pc : do_raw_spin_lock+0x84/0x2cc kernel/locking/spinlock_debug.c:115 lr : __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] lr : _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 sp : ffff8000a7ae7040 x29: ffff8000a7ae70c0 x28: 0000000000000000 x27: ffff8000a7ae7180 x26: dfff800000000000 x25: ffff700014f5ce30 x24: dfff800000000000 x23: 0000000000000800 x22: ffff0000e1cbb910 x21: ffff0000cb92c000 x20: 0000001000000063 x19: 000000100000005f x18: 1fffe000337a0688 x17: ffff80008f7be000 x16: ffff8000805354d8 x15: 0000000000000001 x14: 1ffff0001260d8fc x13: 0000000000000000 x12: 0000000000000000 x11: 1ffff00014f5ce0c x10: ffff80008efad53b x9 : f3f3f304f1f1f1f1 x8 : 000000020000000c x7 : 0000000000000001 x6 : ffff800080dd7c18 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff80008b6577c0 x0 : 000000100000005f Call trace: debug_spin_lock_before kernel/locking/spinlock_debug.c:-1 [inline] (P) do_raw_spin_lock+0x84/0x2cc kernel/locking/spinlock_debug.c:115 (P) __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] igrab+0x20/0xd8 fs/inode.c:1540 ocfs2_get_system_file_inode+0x188/0x650 fs/ocfs2/sysfile.c:104 ocfs2_remove_inode fs/ocfs2/inode.c:723 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x12e8/0x3bf8 fs/ocfs2/inode.c:1292 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4474 do_rmdir+0x214/0x4c4 fs/namei.c:4516 __do_sys_unlinkat fs/namei.c:4690 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Code: aa0003f3 f9000feb f2fe7e69 f8386969 (38f86908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa0003f3 mov x19, x0 4: f9000feb str x11, [sp, #24] 8: f2fe7e69 movk x9, #0xf3f3, lsl #48 c: f8386969 str x9, [x11, x24] * 10: 38f86908 ldrsb w8, [x8, x24] <-- trapping instruction