On Thu, 8 Dec 2022 at 02:17, 'Zeng Heng' via syzkaller-bugs <syzkaller-bugs@xxxxxxxxxxxxxxxx> wrote: > > > On 2022/12/7 15:00, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 8ed710da2873 Merge tag 'arm64-fixes' of git://git.kernel.o.. > > git tree: upstream > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=10027d97880000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=50de433dd4debef8 > > dashboard link: https://syzkaller.appspot.com/bug?extid=9fcea5ef6dc4dc72d334 > > compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=160e0797880000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16bf79d5880000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/75851d210874/disk-8ed710da.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/c70846514634/vmlinux-8ed710da.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/34393d745af1/bzImage-8ed710da.xz > > mounted in repro: https://storage.googleapis.com/syzbot-assets/ce942d5850e5/mount_0.gz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+9fcea5ef6dc4dc72d334@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > loop0: detected capacity change from 0 to 4096 > > ntfs3: loop0: Different NTFS' sector size (1024) and media sector size (512) > > ================================================================== > > BUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] > > BUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 > > Read of size 1 at addr ffff888021acaf3d by task syz-executor128/3632 > > > > CPU: 1 PID: 3632 Comm: syz-executor128 Not tainted 6.1.0-rc8-syzkaller-00014-g8ed710da2873 #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 > > Call Trace: > > <TASK> > > __dump_stack lib/dump_stack.c:88 [inline] > > dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 > > print_address_description+0x74/0x340 mm/kasan/report.c:284 > > print_report+0x107/0x220 mm/kasan/report.c:395 > > kasan_report+0x139/0x170 mm/kasan/report.c:495 > > ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] > > ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 > > vfs_listxattr fs/xattr.c:457 [inline] > > listxattr+0x293/0x2d0 fs/xattr.c:804 > > path_listxattr fs/xattr.c:828 [inline] > > __do_sys_llistxattr fs/xattr.c:846 [inline] > > __se_sys_llistxattr fs/xattr.c:843 [inline] > > __x64_sys_llistxattr+0x174/0x230 fs/xattr.c:843 > > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > > do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 > > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > RIP: 0033:0x7fbd70b66749 > > Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007fff05b9d818 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 > > RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fbd70b66749 > > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 > > RBP: 00007fbd70b25fe0 R08: 000000000001f6fe R09: 0000000000000000 > > R10: 00007fff05b9d6e0 R11: 0000000000000246 R12: 00007fbd70b26070 > > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > > </TASK> > > > > Allocated by task 3632: > > kasan_save_stack mm/kasan/common.c:45 [inline] > > kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 > > ____kasan_kmalloc mm/kasan/common.c:371 [inline] > > __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 > > kasan_kmalloc include/linux/kasan.h:211 [inline] > > __do_kmalloc_node mm/slab_common.c:955 [inline] > > __kmalloc+0xaf/0x1a0 mm/slab_common.c:968 > > kmalloc include/linux/slab.h:558 [inline] > > ntfs_read_ea+0x437/0x820 fs/ntfs3/xattr.c:110 > > ntfs_list_ea fs/ntfs3/xattr.c:168 [inline] > > ntfs_listxattr+0x184/0x570 fs/ntfs3/xattr.c:710 > > vfs_listxattr fs/xattr.c:457 [inline] > > listxattr+0x293/0x2d0 fs/xattr.c:804 > > path_listxattr fs/xattr.c:828 [inline] > > __do_sys_llistxattr fs/xattr.c:846 [inline] > > __se_sys_llistxattr fs/xattr.c:843 [inline] > > __x64_sys_llistxattr+0x174/0x230 fs/xattr.c:843 > > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > > do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 > > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > > > The buggy address belongs to the object at ffff888021acaf00 > > which belongs to the cache kmalloc-64 of size 64 > > The buggy address is located 61 bytes inside of > > 64-byte region [ffff888021acaf00, ffff888021acaf40) > > > > The buggy address belongs to the physical page: > > page:ffffea000086b280 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888021aca080 pfn:0x21aca > > flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) > > raw: 00fff00000000200 ffffea0000796a40 dead000000000005 ffff888012841640 > > raw: ffff888021aca080 000000008020001d 00000001ffffffff 0000000000000000 > > page dumped because: kasan: bad access detected > > page_owner tracks the page as allocated > > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 46, tgid 46 (kworker/u4:3), ts 7050450825, free_ts 6956530319 > > prep_new_page mm/page_alloc.c:2539 [inline] > > get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4291 > > __alloc_pages+0x259/0x560 mm/page_alloc.c:5558 > > alloc_slab_page+0xbd/0x190 mm/slub.c:1794 > > allocate_slab+0x5e/0x4b0 mm/slub.c:1939 > > new_slab mm/slub.c:1992 [inline] > > ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3180 > > __slab_alloc mm/slub.c:3279 [inline] > > slab_alloc_node mm/slub.c:3364 [inline] > > __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437 > > kmalloc_node_trace+0x23/0x60 mm/slab_common.c:1058 > > kmalloc_node include/linux/slab.h:575 [inline] > > kzalloc_node include/linux/slab.h:700 [inline] > > __get_vm_area_node+0x13f/0x380 mm/vmalloc.c:2494 > > __vmalloc_node_range+0x3a6/0x1400 mm/vmalloc.c:3173 > > alloc_thread_stack_node+0x307/0x500 kernel/fork.c:311 > > dup_task_struct+0x8b/0x490 kernel/fork.c:974 > > copy_process+0x637/0x3fc0 kernel/fork.c:2084 > > kernel_clone+0x227/0x640 kernel/fork.c:2671 > > user_mode_thread+0x12d/0x190 kernel/fork.c:2747 > > call_usermodehelper_exec_work+0x57/0x220 kernel/umh.c:175 > > process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 > > page last free stack trace: > > reset_page_owner include/linux/page_owner.h:24 [inline] > > free_pages_prepare mm/page_alloc.c:1459 [inline] > > free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 > > free_unref_page_prepare mm/page_alloc.c:3387 [inline] > > free_unref_page+0x7d/0x630 mm/page_alloc.c:3483 > > __vunmap+0x867/0x9d0 mm/vmalloc.c:2713 > > free_work+0x66/0x90 mm/vmalloc.c:97 > > process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 > > worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 > > kthread+0x266/0x300 kernel/kthread.c:376 > > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 > > > > Memory state around the buggy address: > > ffff888021acae00: 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc fc > > ffff888021acae80: 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc fc > >> ffff888021acaf00: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc > > ^ > > ffff888021acaf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc > > ffff888021acb000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > > ================================================================== > > > > > > --- > > This report is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > > > syzbot will keep track of this issue. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > syzbot can test patches for this issue, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > > #syz fix: [PATCH] ntfs: fix panic about slab-out-of-bounds caused by > ntfs_listxattr() Fix up the title ([PATCH] is removed before committing to git + avoid line wrap): #syz fix: ntfs: fix panic about slab-out-of-bounds caused by ntfs_listxattr()
