================================================================== BUG: KASAN: stack-out-of-bounds in save_return_addr+0xd8/0xdc arch/arm64/kernel/return_address.c:25 Read of size 4 at addr ffff8000239a75bf by task syz-executor424/8743 CPU: 0 PID: 8743 Comm: syz-executor424 Not tainted 6.3.0-rc7-syzkaller-00084-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 save_return_addr+0xd8/0xdc arch/arm64/kernel/return_address.c:25 unwind arch/arm64/kernel/stacktrace.c:138 [inline] arch_stack_walk+0x148/0x2b4 arch/arm64/kernel/stacktrace.c:208 return_address+0xcc/0x16c arch/arm64/kernel/return_address.c:42 trace_hardirqs_off+0x158/0x27c kernel/trace/trace_preemptirq.c:92 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:375 [inline] truncate_inode_pages_final+0x70/0xc0 mm/truncate.c:479 ntfs_evict_inode+0x24/0xc8 fs/ntfs3/inode.c:1771 evict+0x260/0x68c fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x734/0x818 fs/inode.c:1774 ntfs_fill_super+0x34a8/0x3b9c fs/ntfs3/super.c:1239 get_tree_bdev+0x360/0x54c fs/super.c:1303 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1408 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to stack of task syz-executor424/8743 and is located at offset 31 in frame: return_address+0x0/0x16c This frame has 1 object: [32, 48) 'data' The buggy address belongs to the virtual mapping at [ffff8000239a0000, ffff8000239a9000) created by: copy_process+0x4b8/0x3808 kernel/fork.c:2098 The buggy address belongs to the physical page: page:000000006669eb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129769 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8000239a7480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8000239a7500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8000239a7580: 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 00 00 00 00 ^ ffff8000239a7600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8000239a7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ntfs3: loop5: Mark volume as dirty due to NTFS errors ntfs3: loop5: Failed to load $Extend.