====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0 Not tainted ------------------------------------------------------ syz-executor.4/21882 is trying to acquire lock: ffff888057441b60 (mapping.invalidate_lock#8){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] ffff888057441b60 (mapping.invalidate_lock#8){++++}-{3:3}, at: page_cache_ra_unbounded+0x133/0x5a0 mm/readahead.c:225 but task is already holding lock: ffff888079d4e0a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] ffff888079d4e0a0 (&mm->mmap_lock){++++}-{3:3}, at: io_pin_pages+0xe3/0x290 io_uring/rsrc.c:890 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_lock){++++}-{3:3}: __might_fault mm/memory.c:6220 [inline] __might_fault+0x11b/0x190 mm/memory.c:6213 _copy_to_user+0x2b/0xc0 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:191 [inline] fiemap_fill_next_extent+0x232/0x390 fs/ioctl.c:145 ni_fiemap+0x444/0xc10 fs/ntfs3/frecord.c:2065 ntfs_fiemap+0xc9/0x120 fs/ntfs3/file.c:1206 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x404/0x1ac0 fs/ioctl.c:838 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x116/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ni->file.run_lock#3){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ntfs_set_size+0x119/0x220 fs/ntfs3/inode.c:837 ntfs_fallocate+0xd2c/0x1120 fs/ntfs3/file.c:601 vfs_fallocate+0x4b8/0xf70 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xd5/0x140 fs/open.c:359 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ni->ni_lock/4){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 ni_lock fs/ntfs3/ntfs_fs.h:1121 [inline] ntfs_fallocate+0x7da/0x1120 fs/ntfs3/file.c:501 vfs_fallocate+0x4b8/0xf70 fs/open.c:330 ioctl_preallocate+0x1a8/0x220 fs/ioctl.c:291 file_ioctl fs/ioctl.c:334 [inline] do_vfs_ioctl+0x16dd/0x1ac0 fs/ioctl.c:883 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x116/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#8){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] page_cache_ra_unbounded+0x133/0x5a0 mm/readahead.c:225 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x64b/0x9a0 mm/readahead.c:539 do_sync_mmap_readahead mm/filemap.c:3151 [inline] filemap_fault+0x1747/0x38d0 mm/filemap.c:3289 __do_fault+0x10a/0x4a0 mm/memory.c:4531 do_cow_fault mm/memory.c:4924 [inline] do_fault mm/memory.c:5026 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x10b3/0x4b40 mm/memory.c:5441 handle_mm_fault+0x476/0xa00 mm/memory.c:5606 faultin_page mm/gup.c:958 [inline] __get_user_pages+0x4cc/0x1510 mm/gup.c:1257 __get_user_pages_locked mm/gup.c:1525 [inline] __gup_longterm_locked+0x6a2/0x2850 mm/gup.c:2228 pin_user_pages+0x13f/0x160 mm/gup.c:3401 io_pin_pages+0x100/0x290 io_uring/rsrc.c:891 io_sqe_buffer_register+0x125/0x1720 io_uring/rsrc.c:927 io_sqe_buffers_register+0x2f3/0x7b0 io_uring/rsrc.c:1045 __io_uring_register io_uring/register.c:418 [inline] __do_sys_io_uring_register+0xf51/0x2220 io_uring/register.c:613 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: mapping.invalidate_lock#8 --> &ni->file.run_lock#3 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->file.run_lock#3); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#8); *** DEADLOCK *** 2 locks held by syz-executor.4/21882: #0: ffff888079e5e0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register+0x1a7/0x2220 io_uring/register.c:612 #1: ffff888079d4e0a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #1: ffff888079d4e0a0 (&mm->mmap_lock){++++}-{3:3}, at: io_pin_pages+0xe3/0x290 io_uring/rsrc.c:890 stack backtrace: CPU: 0 PID: 21882 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] page_cache_ra_unbounded+0x133/0x5a0 mm/readahead.c:225 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x64b/0x9a0 mm/readahead.c:539 do_sync_mmap_readahead mm/filemap.c:3151 [inline] filemap_fault+0x1747/0x38d0 mm/filemap.c:3289 __do_fault+0x10a/0x4a0 mm/memory.c:4531 do_cow_fault mm/memory.c:4924 [inline] do_fault mm/memory.c:5026 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x10b3/0x4b40 mm/memory.c:5441 handle_mm_fault+0x476/0xa00 mm/memory.c:5606 faultin_page mm/gup.c:958 [inline] __get_user_pages+0x4cc/0x1510 mm/gup.c:1257 __get_user_pages_locked mm/gup.c:1525 [inline] __gup_longterm_locked+0x6a2/0x2850 mm/gup.c:2228 pin_user_pages+0x13f/0x160 mm/gup.c:3401 io_pin_pages+0x100/0x290 io_uring/rsrc.c:891 io_sqe_buffer_register+0x125/0x1720 io_uring/rsrc.c:927 io_sqe_buffers_register+0x2f3/0x7b0 io_uring/rsrc.c:1045 __io_uring_register io_uring/register.c:418 [inline] __do_sys_io_uring_register+0xf51/0x2220 io_uring/register.c:613 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2cea67dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2cea1ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007f2cea7abf80 RCX: 00007f2cea67dea9 RDX: 00000000200002c0 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007f2cea6ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 100000000000011a R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2cea7abf80 R15: 00007ffc22591e58