================================================================== BUG: KASAN: stack-out-of-bounds in ino_get fs/ntfs3/ntfs.h:193 [inline] BUG: KASAN: stack-out-of-bounds in ntfs_set_inode+0x65/0x70 fs/ntfs3/inode.c:502 Read of size 4 at addr ffffc9000c70fcaf by task syz-executor.2/11705 CPU: 3 PID: 11705 Comm: syz-executor.2 Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 ino_get fs/ntfs3/ntfs.h:193 [inline] ntfs_set_inode+0x65/0x70 fs/ntfs3/inode.c:502 inode_insert5+0x125/0x660 fs/inode.c:1188 iget5_locked fs/inode.c:1246 [inline] iget5_locked+0x225/0x2c0 fs/inode.c:1235 ntfs_iget5+0xd2/0x3310 fs/ntfs3/inode.c:511 ntfs_fill_super+0x3138/0x3ab0 fs/ntfs3/super.c:1244 get_tree_bdev+0x444/0x760 fs/super.c:1303 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 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] __ia32_sys_mount+0x282/0x300 fs/namespace.c:3571 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7ffb579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7ff6410 EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00000000f7ff6480 RCX: 000000002001f840 RDX: 000000002001f800 RSI: 0000000000000000 RDI: 00000000f7ff64c0 RBP: 00000000f7ff64c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to stack of task syz-executor.2/11705 and is located at offset 127 in frame: ntfs_fill_super+0x0/0x3ab0 fs/ntfs3/super.c:473 This frame has 5 objects: [48, 52) 'vcn' [64, 68) 'lcn' [80, 84) 'len' [96, 104) 'tt' [128, 136) 'ref' The buggy address belongs to the virtual mapping at [ffffc9000c708000, ffffc9000c711000) created by: kernel_clone+0xeb/0x890 kernel/fork.c:2679 The buggy address belongs to the physical page: page:ffffea0001ce5ec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7397b memcg:ffff88806a728c02 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88806a728c02 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 11704, tgid 11704 (syz-executor.2), ts 387244541977, free_ts 375275188316 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 vm_area_alloc_pages mm/vmalloc.c:2953 [inline] __vmalloc_area_node mm/vmalloc.c:3029 [inline] __vmalloc_node_range+0xafe/0x1390 mm/vmalloc.c:3199 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:979 [inline] copy_process+0x1320/0x7590 kernel/fork.c:2095 kernel_clone+0xeb/0x890 kernel/fork.c:2679 __do_compat_sys_ia32_clone+0x9e/0xd0 arch/x86/kernel/sys_ia32.c:254 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] do_int80_syscall_32+0x4a/0x90 arch/x86/entry/common.c:132 entry_INT80_compat+0x8f/0xa0 arch/x86/entry/entry_64_compat.S:353 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3483 kasan_depopulate_vmalloc_pte+0x60/0x80 mm/kasan/shadow.c:427 apply_to_pte_range mm/memory.c:2578 [inline] apply_to_pmd_range mm/memory.c:2622 [inline] apply_to_pud_range mm/memory.c:2658 [inline] apply_to_p4d_range mm/memory.c:2694 [inline] __apply_to_page_range+0x68c/0x1030 mm/memory.c:2728 kasan_release_vmalloc+0xab/0xc0 mm/kasan/shadow.c:544 __purge_vmap_area_lazy+0x886/0x1e60 mm/vmalloc.c:1767 drain_vmap_area_work+0x54/0xd0 mm/vmalloc.c:1800 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffffc9000c70fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000c70fc00: 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 04 f2 >ffffc9000c70fc80: 04 f2 00 f2 f2 f2 00 f3 f3 f3 00 00 00 00 00 00 ^ ffffc9000c70fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000c70fd80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 ================================================================== ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi