ntfs3: loop2: Failed to initialize $Extend/$ObjId. ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Not tainted ------------------------------------------------------ syz-executor.2/10234 is trying to acquire lock: ffff888053c12a20 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] ffff888053c12a20 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x133/0x5a0 mm/readahead.c:225 but task is already holding lock: ffff888020c39e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] ffff888020c39e20 (&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: -> #2 (&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+0x205/0x350 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+0x404/0x1a90 fs/ioctl.c:838 __do_compat_sys_ioctl+0x149/0x330 fs/ioctl.c:998 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #1 (&ni->file.run_lock#3){++++}-{3:3}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 attr_data_get_block+0x18b/0x1b70 fs/ntfs3/attrib.c:902 ntfs_get_block_vbo+0x288/0xed0 fs/ntfs3/inode.c:587 do_mpage_readpage+0x660/0x17c0 fs/mpage.c:232 mpage_read_folio+0xa9/0x140 fs/mpage.c:399 ntfs_read_folio+0x157/0x1f0 fs/ntfs3/inode.c:725 filemap_read_folio+0xe7/0x2c0 mm/filemap.c:2331 filemap_create_folio mm/filemap.c:2459 [inline] filemap_get_pages+0xddb/0x1840 mm/filemap.c:2512 filemap_read+0x3af/0xd10 mm/filemap.c:2601 generic_file_read_iter+0x350/0x460 mm/filemap.c:2782 ntfs_file_read_iter+0x258/0x330 fs/ntfs3/file.c:768 call_read_iter include/linux/fs.h:2104 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0x6c0/0xb80 fs/read_write.c:476 ksys_read+0x12f/0x260 fs/read_write.c:619 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #0 (mapping.invalidate_lock#3){.+.+}-{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+0x10b3/0x4a80 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+0x2d2/0x7e0 io_uring/rsrc.c:1045 __io_uring_register io_uring/register.c:418 [inline] __do_sys_io_uring_register+0x1156/0x22c0 io_uring/register.c:613 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Chain exists of: mapping.invalidate_lock#3 --> &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#3); *** DEADLOCK *** 2 locks held by syz-executor.2/10234: #0: ffff8880294200a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register+0x19b/0x22c0 io_uring/register.c:612 #1: ffff888020c39e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #1: ffff888020c39e20 (&mm->mmap_lock){++++}-{3:3}, at: io_pin_pages+0xe3/0x290 io_uring/rsrc.c:890 stack backtrace: CPU: 0 PID: 10234 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 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+0x10b3/0x4a80 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+0x2d2/0x7e0 io_uring/rsrc.c:1045 __io_uring_register io_uring/register.c:418 [inline] __do_sys_io_uring_register+0x1156/0x22c0 io_uring/register.c:613 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7336579 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:00000000f5f285ac EFLAGS: 00000292 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 000000000000000b RCX: 0000000000000000 RDX: 00000000200002c0 RSI: 000000000000011a RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- 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 ret 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