====================================================== WARNING: possible circular locking dependency detected 6.5.0-rc5-syzkaller-00029-g14f9643dc90a #0 Not tainted ------------------------------------------------------ syz-executor.3/25552 is trying to acquire lock: ffff88803e798ca0 (mapping.invalidate_lock#7){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:826 [inline] ffff88803e798ca0 (mapping.invalidate_lock#7){++++}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225 but task is already holding lock: ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:167 [inline] ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5261 [inline] ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5323 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xba/0x120 mm/memory.c:5856 _copy_to_user+0x2a/0xa0 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:191 [inline] fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:144 ni_fiemap+0xa5e/0x1230 fs/ntfs3/frecord.c:2065 ntfs_fiemap+0x132/0x180 fs/ntfs3/file.c:1163 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x19db/0x2b30 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&ni->file.run_lock#3){++++}-{3:3}: down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 attr_data_get_block+0x2e7/0x2da0 fs/ntfs3/attrib.c:902 ntfs_get_block_vbo+0x36a/0xd00 fs/ntfs3/inode.c:585 do_mpage_readpage+0x911/0x1fa0 fs/mpage.c:234 mpage_read_folio+0x108/0x1d0 fs/mpage.c:400 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2389 filemap_fault+0xf86/0x1810 mm/filemap.c:3382 __do_fault+0x136/0x500 mm/memory.c:4198 do_shared_fault mm/memory.c:4602 [inline] do_fault mm/memory.c:4674 [inline] do_pte_missing mm/memory.c:3664 [inline] handle_pte_fault mm/memory.c:4939 [inline] __handle_mm_fault mm/memory.c:5079 [inline] handle_mm_fault+0x1f7b/0x5410 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x266/0x7c0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #0 (mapping.invalidate_lock#7){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5144 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761 down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:826 [inline] page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3205 filemap_fault+0x81b/0x1810 mm/filemap.c:3297 __do_fault+0x136/0x500 mm/memory.c:4198 do_read_fault mm/memory.c:4547 [inline] do_fault mm/memory.c:4670 [inline] do_pte_missing mm/memory.c:3664 [inline] handle_pte_fault mm/memory.c:4939 [inline] __handle_mm_fault mm/memory.c:5079 [inline] handle_mm_fault+0x4172/0x5410 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x266/0x7c0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 strncpy_from_user+0x111/0x2e0 lib/strncpy_from_user.c:139 getname_flags+0xf9/0x4e0 fs/namei.c:151 do_sys_openat2+0xd2/0x1d0 fs/open.c:1401 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: mapping.invalidate_lock#7 --> &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#7); *** DEADLOCK *** 1 lock held by syz-executor.3/25552: #0: ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:167 [inline] #0: ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5261 [inline] #0: ffff8880235eea20 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5323 stack backtrace: CPU: 1 PID: 25552 Comm: syz-executor.3 Not tainted 6.5.0-rc5-syzkaller-00029-g14f9643dc90a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x375/0x4a0 kernel/locking/lockdep.c:2195 check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5144 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761 down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:826 [inline] page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3205 filemap_fault+0x81b/0x1810 mm/filemap.c:3297 __do_fault+0x136/0x500 mm/memory.c:4198 do_read_fault mm/memory.c:4547 [inline] do_fault mm/memory.c:4670 [inline] do_pte_missing mm/memory.c:3664 [inline] handle_pte_fault mm/memory.c:4939 [inline] __handle_mm_fault mm/memory.c:5079 [inline] handle_mm_fault+0x4172/0x5410 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x266/0x7c0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0x111/0x2e0 lib/strncpy_from_user.c:139 Code: 00 00 00 4c 89 e6 e8 ae 58 1c fd 49 83 fc 07 0f 86 9a 00 00 00 48 89 6c 24 08 48 c7 44 24 10 f8 ff ff ff 45 31 ed 4c 89 3c 24 <4f> 8b 3c 2f 48 b8 ff fe fe fe fe fe fe fe 49 8d 1c 07 4c 89 fd 48 RSP: 0018:ffffc90015967cb8 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807ea6d940 RDX: 0000000000000000 RSI: 0000000000000fe0 RDI: 0000000000000007 RBP: 0000000000000fe0 R08: ffffffff846f6312 R09: 1ffffd4000126780 R10: dffffc0000000000 R11: fffff94000126781 R12: 0000000000000fe0 R13: 0000000000000000 R14: ffff888024cf1120 R15: 00000000200001c0 getname_flags+0xf9/0x4e0 fs/namei.c:151 do_sys_openat2+0xd2/0x1d0 fs/open.c:1401 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f999647cae9 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:00007f999726f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f999659c050 RCX: 00007f999647cae9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 00007f99964c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f999659c050 R15: 00007ffe8ba32918 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 4c 89 e6 add %cl,-0x1a(%rcx,%rcx,4) 6: e8 ae 58 1c fd call 0xfd1c58b9 b: 49 83 fc 07 cmp $0x7,%r12 f: 0f 86 9a 00 00 00 jbe 0xaf 15: 48 89 6c 24 08 mov %rbp,0x8(%rsp) 1a: 48 c7 44 24 10 f8 ff movq $0xfffffffffffffff8,0x10(%rsp) 21: ff ff 23: 45 31 ed xor %r13d,%r13d 26: 4c 89 3c 24 mov %r15,(%rsp) * 2a: 4f 8b 3c 2f mov (%r15,%r13,1),%r15 <-- trapping instruction 2e: 48 b8 ff fe fe fe fe movabs $0xfefefefefefefeff,%rax 35: fe fe fe 38: 49 8d 1c 07 lea (%r15,%rax,1),%rbx 3c: 4c 89 fd mov %r15,%rbp 3f: 48 rex.W