loop4: detected capacity change from 0 to 4096 ntfs3: loop4: Different NTFS' sector size (2048) and media sector size (512) ================================================================== BUG: KASAN: use-after-free in ntfs_iget5+0x120/0x2acc fs/ntfs3/inode.c:526 Read of size 8 at addr ffff0000e8ef4840 by task syz.4.6384/17837 CPU: 1 PID: 17837 Comm: syz.4.6384 Not tainted 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 ntfs_iget5+0x120/0x2acc fs/ntfs3/inode.c:526 ntfs_fill_super+0x1824/0x2f2c fs/ntfs3/super.c:1004 get_tree_bdev+0x358/0x544 fs/super.c:1325 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1354 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3014 path_mount+0x5b4/0x1000 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 7448: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8c/0xcc mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x74/0x408 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x1e0/0x3e4 mm/slub.c:3233 reiserfs_alloc_inode+0x24/0xbc fs/reiserfs/super.c:642 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x68/0x1fc fs/inode.c:1001 new_inode+0x38/0x174 fs/inode.c:1030 reiserfs_mkdir+0x180/0x788 fs/reiserfs/namei.c:815 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] create_privroot fs/reiserfs/xattr.c:889 [inline] reiserfs_xattr_init+0x2b0/0x6dc fs/reiserfs/xattr.c:1012 reiserfs_fill_super+0x17ec/0x1bb4 fs/reiserfs/super.c:2179 mount_bdev+0x264/0x358 fs/super.c:1400 get_super_block+0x44/0x58 fs/reiserfs/super.c:2608 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3014 path_mount+0x5b4/0x1000 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xcc/0x114 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x110/0x8f0 kernel/rcu/tree.c:3087 destroy_inode fs/inode.c:316 [inline] evict+0x748/0x810 fs/inode.c:662 dispose_list fs/inode.c:680 [inline] evict_inodes+0x64c/0x6e4 fs/inode.c:734 generic_shutdown_super+0x9c/0x2f0 fs/super.c:454 kill_block_super+0x70/0xdc fs/super.c:1427 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the object at ffff0000e8ef4240 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1536 bytes inside of 1568-byte region [ffff0000e8ef4240, ffff0000e8ef4860) The buggy address belongs to the page: page:0000000091fa740f refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000e8ef6a00 pfn:0x128ef0 head:0000000091fa740f order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000cef0cc01 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0b46180 raw: ffff0000e8ef6a00 0000000080130011 00000001ffffffff ffff0000cef0cc01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e8ef4700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e8ef4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000e8ef4800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff0000e8ef4880: fc fc fc fc fc fc fc fc fc fc fc fc 00 00 00 00 ffff0000e8ef4900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address dfff800000000002 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000002] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 17837 Comm: syz.4.6384 Tainted: G B 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ntfs_iget5+0x12c/0x2acc fs/ntfs3/inode.c:526 lr : ntfs_iget5+0x120/0x2acc fs/ntfs3/inode.c:526 sp : ffff80001fb17620 x29: ffff80001fb17840 x28: ffff0000d13be000 x27: ffff80001fb177a0 x26: dfff800000000000 x25: ffff700003f62ef4 x24: ffff8000115e95a0 x23: ffff0000e8ef4840 x22: 0000000000000002 x21: ffff0000e8ef4a70 x20: 0000000000000010 x19: 0000000000000000 x18: 0000000000000002 x17: 0000000040000000 x16: ffff8000082d4b38 x15: 0000000000000002 x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000080000 x11: 00000000000335e2 x10: ffff800021a5a000 x9 : 0000000000000000 x8 : 0000000000000002 x7 : 0000000000000000 x6 : ffff80000824408c x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800008184528 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: ntfs_iget5+0x12c/0x2acc fs/ntfs3/inode.c:526 ntfs_fill_super+0x1824/0x2f2c fs/ntfs3/super.c:1004 get_tree_bdev+0x358/0x544 fs/super.c:1325 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1354 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3014 path_mount+0x5b4/0x1000 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: 97cd3199 f94002e8 91004114 d343fe88 (38fa6908) ---[ end trace 20d7305119094da8 ]--- ---------------- Code disassembly (best guess): 0: 97cd3199 bl 0xffffffffff34c664 4: f94002e8 ldr x8, [x23] 8: 91004114 add x20, x8, #0x10 c: d343fe88 lsr x8, x20, #3 * 10: 38fa6908 ldrsb w8, [x8, x26] <-- trapping instruction