Hello, syzbot found the following issue on: HEAD commit: d528014517f2 Revert ".gitignore: ignore *.cover and *.mbx" git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1785ad94a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=d576750da57ebbb5 dashboard link: https://syzkaller.appspot.com/bug?extid=5b2f934f08ab03d473ff compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-d5280145.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/84fcf20c8c27/vmlinux-d5280145.xz kernel image: https://storage.googleapis.com/syzbot-assets/1ab1ac572337/bzImage-d5280145.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5b2f934f08ab03d473ff@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1577 at fs/ntfs3/bitmap.c:216 rb_insert_start fs/ntfs3/bitmap.c:216 [inline] WARNING: CPU: 3 PID: 1577 at fs/ntfs3/bitmap.c:216 wnd_add_free_ext+0xd29/0x10e0 fs/ntfs3/bitmap.c:351 Modules linked in: CPU: 3 PID: 1577 Comm: syz-executor.1 Not tainted 6.4.0-syzkaller-11478-gd528014517f2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:rb_insert_start fs/ntfs3/bitmap.c:216 [inline] RIP: 0010:wnd_add_free_ext+0xd29/0x10e0 fs/ntfs3/bitmap.c:351 Code: c1 ea 03 80 3c 02 00 0f 85 3b 02 00 00 49 8d 85 e0 00 00 00 4d 89 b5 00 01 00 00 48 89 44 24 10 e9 b9 f9 ff ff e8 87 1a cf fe <0f> 0b e9 40 fd ff ff e8 7b 1a cf fe 48 8b 7c 24 10 e8 31 19 5b 07 RSP: 0018:ffffc900079bec10 EFLAGS: 00010216 RAX: 000000000003c404 RBX: 0000000000000000 RCX: ffffc90028037000 RDX: 0000000000040000 RSI: ffffffff82b5c4e9 RDI: 0000000000000006 RBP: ffff888029643ba0 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88804a80e1f0 R14: dffffc0000000000 R15: ffff888029643360 FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f36b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000edbfe800 CR3: 0000000074033000 CR4: 0000000000352ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> wnd_zone_set+0x159/0x1b0 fs/ntfs3/bitmap.c:1419 ntfs_look_for_free_space+0x479/0x740 fs/ntfs3/fsntfs.c:421 attr_allocate_clusters+0x3ee/0x6e0 fs/ntfs3/attrib.c:159 attr_set_size+0x1452/0x2ac0 fs/ntfs3/attrib.c:572 ntfs_extend_mft+0x296/0x430 fs/ntfs3/fsntfs.c:526 ntfs_look_free_mft+0x548/0xe60 fs/ntfs3/fsntfs.c:589 ni_create_attr_list+0xbdd/0x12c0 fs/ntfs3/frecord.c:873 ni_ins_attr_ext+0x3ca/0xba0 fs/ntfs3/frecord.c:968 ni_insert_attr+0x3ea/0x850 fs/ntfs3/frecord.c:1135 ni_insert_resident+0xd9/0x3a0 fs/ntfs3/frecord.c:1519 ntfs_set_ea+0xa3b/0x1380 fs/ntfs3/xattr.c:433 ntfs_save_wsl_perm+0x12b/0x3d0 fs/ntfs3/xattr.c:944 ntfs3_setattr+0xa2b/0xc30 fs/ntfs3/file.c:708 notify_change+0xb2c/0x1180 fs/attr.c:483 chown_common+0x57f/0x650 fs/open.c:768 do_fchownat+0x12a/0x1e0 fs/open.c:799 ksys_lchown include/linux/syscalls.h:1342 [inline] __do_sys_lchown16 kernel/uid16.c:30 [inline] __se_sys_lchown16 kernel/uid16.c:28 [inline] __ia32_sys_lchown16+0xe3/0x110 kernel/uid16.c:28 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: 0023:0xf7f3b579 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:00000000f7f365cc EFLAGS: 00000296 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020000140 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> ---------------- 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 --- 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
