======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc6-syzkaller-00202-ga29967be967e #0 Not tainted
------------------------------------------------------
syz.9.182/11037 is trying to acquire lock:
ffff88801b0759a0 (&mm->mmap_lock){++++}-{4:4}, at: gup_fast_fallback+0x246/0x29c0 mm/gup.c:3406
but task is already holding lock:
ffff88805aff99a0 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
ffff88805aff99a0 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}, at: __blockdev_direct_IO+0x31d/0x4890 fs/direct-io.c:1140
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:877 [inline]
ntfs_file_mmap+0x5bc/0x850 fs/ntfs3/file.c:379
call_mmap include/linux/fs.h:2245 [inline]
mmap_file mm/internal.h:124 [inline]
__mmap_new_file_vma mm/vma.c:2296 [inline]
__mmap_new_vma mm/vma.c:2360 [inline]
__mmap_region mm/vma.c:2461 [inline]
mmap_region+0x247c/0x2fa0 mm/vma.c:2539
do_mmap+0xecc/0x13a0 mm/mmap.c:561
vm_mmap_pgoff+0x214/0x430 mm/util.c:575
ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607
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 (&mm->mmap_lock){++++}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
gup_fast_fallback+0x25f/0x29c0 mm/gup.c:3406
pin_user_pages_fast+0xcc/0x160 mm/gup.c:3530
iov_iter_extract_user_pages lib/iov_iter.c:1845 [inline]
iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1908
dio_refill_pages fs/direct-io.c:172 [inline]
dio_get_page fs/direct-io.c:213 [inline]
do_direct_IO fs/direct-io.c:915 [inline]
__blockdev_direct_IO+0x1443/0x4890 fs/direct-io.c:1243
blockdev_direct_IO include/linux/fs.h:3412 [inline]
ntfs_direct_IO+0x194/0x370 fs/ntfs3/inode.c:809
generic_file_read_iter+0x341/0x550 mm/filemap.c:2860
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x975/0xb40 fs/read_write.c:565
ksys_read+0x18f/0x2b0 fs/read_write.c:708
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(&sb->s_type->i_mutex_key#39);
lock(&mm->mmap_lock);
lock(&sb->s_type->i_mutex_key#39);
rlock(&mm->mmap_lock);
*** DEADLOCK ***
2 locks held by syz.9.182/11037:
#0: ffff888034b46478 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x254/0x320 fs/file.c:1192
#1: ffff88805aff99a0 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff88805aff99a0 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}, at: __blockdev_direct_IO+0x31d/0x4890 fs/direct-io.c:1140
stack backtrace:
CPU: 1 UID: 0 PID: 11037 Comm: syz.9.182 Not tainted 6.14.0-rc6-syzkaller-00202-ga29967be967e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
gup_fast_fallback+0x25f/0x29c0 mm/gup.c:3406
pin_user_pages_fast+0xcc/0x160 mm/gup.c:3530
iov_iter_extract_user_pages lib/iov_iter.c:1845 [inline]
iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1908
dio_refill_pages fs/direct-io.c:172 [inline]
dio_get_page fs/direct-io.c:213 [inline]
do_direct_IO fs/direct-io.c:915 [inline]
__blockdev_direct_IO+0x1443/0x4890 fs/direct-io.c:1243
blockdev_direct_IO include/linux/fs.h:3412 [inline]
ntfs_direct_IO+0x194/0x370 fs/ntfs3/inode.c:809
generic_file_read_iter+0x341/0x550 mm/filemap.c:2860
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x975/0xb40 fs/read_write.c:565
ksys_read+0x18f/0x2b0 fs/read_write.c:708
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: 0033:0x7f632218d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6322f54038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f63223a5fa0 RCX: 00007f632218d169
RDX: 0000000000001000 RSI: 0000400000000400 RDI: 0000000000000007
RBP: 00007f632220e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f63223a5fa0 R15: 00007fff04fcc608
</TASK>