syzbot has found a reproducer for the following issue on: HEAD commit: 2f8c4f506285 Merge tag 'auxdisplay-for-v6.11-tag1' of git:.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10836f19980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5efb917b1462a973 dashboard link: https://syzkaller.appspot.com/bug?extid=c1751b6739d83d70bb75 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108328d9980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e875a1980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/beafa5a4d4f9/disk-2f8c4f50.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e58aee7103bd/vmlinux-2f8c4f50.xz kernel image: https://storage.googleapis.com/syzbot-assets/92d87af85377/bzImage-2f8c4f50.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/ed5b83574e49/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c1751b6739d83d70bb75@xxxxxxxxxxxxxxxxxxxxxxxxx ====================================================== WARNING: possible circular locking dependency detected 6.10.0-syzkaller-12708-g2f8c4f506285 #0 Not tainted ------------------------------------------------------ syz-executor114/5223 is trying to acquire lock: ffff888073150af0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] ffff888073150af0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: ntfs_file_mmap+0x5bf/0x850 fs/ntfs3/file.c:368 but task is already holding lock: ffff88807dfbf398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] ffff88807dfbf398 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:586 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 gup_fast_fallback+0x24c/0x2b50 mm/gup.c:3367 pin_user_pages_fast+0xcc/0x160 mm/gup.c:3491 iov_iter_extract_user_pages lib/iov_iter.c:1583 [inline] iov_iter_extract_pages+0x3db/0x720 lib/iov_iter.c:1646 dio_refill_pages fs/direct-io.c:173 [inline] dio_get_page fs/direct-io.c:214 [inline] do_direct_IO fs/direct-io.c:916 [inline] __blockdev_direct_IO+0x144c/0x4890 fs/direct-io.c:1249 blockdev_direct_IO include/linux/fs.h:3212 [inline] ntfs_direct_IO+0x195/0x370 fs/ntfs3/inode.c:801 generic_file_direct_write+0x132/0x350 mm/filemap.c:3941 __generic_file_write_iter+0x129/0x230 mm/filemap.c:4107 ntfs_file_write_iter+0x663/0x740 fs/ntfs3/file.c:1193 do_iter_readv_writev+0x60c/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev2 fs/read_write.c:1131 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1122 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:799 [inline] ntfs_file_mmap+0x5bf/0x850 fs/ntfs3/file.c:368 call_mmap include/linux/fs.h:2129 [inline] mmap_region+0xe91/0x2090 mm/mmap.c:2957 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#15); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#15); *** DEADLOCK *** 1 lock held by syz-executor114/5223: #0: ffff88807dfbf398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ffff88807dfbf398 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:586 stack backtrace: CPU: 0 UID: 0 PID: 5223 Comm: syz-executor114 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186 check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:799 [inline] ntfs_file_mmap+0x5bf/0x850 fs/ntfs3/file.c:368 call_mmap include/linux/fs.h:2129 [inline] mmap_region+0xe91/0x2090 mm/mmap.c:2957 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f71d1735e19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffbfcbe088 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f71d1735e19 RDX: 00000000007fffff RSI: 0000000000003000 RDI: 0000000020000000 RBP: 00007f71d17c95f0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000012 R11: 0000000000000246 R12: 00007fffbfcbe0c0 R13: 00007fffbfcbe2e8 R14: 431bde82d7b634db R15: 00007f71d177f03b </TASK> --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
