====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc5-syzkaller-00322-gb9021de3ec2f #0 Not tainted ------------------------------------------------------ syz.6.1396/12248 is trying to acquire lock: ffff88804f64ea20 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_page_mkwrite+0x346/0xed0 fs/ocfs2/mmap.c:142 but task is already holding lock: ffff88802b6a2518 (sb_pagefaults#5){.+.+}-{0:0}, at: do_page_mkwrite+0x19a/0x480 mm/memory.c:3162 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_pagefaults#5){.+.+}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1716 [inline] sb_start_pagefault include/linux/fs.h:1881 [inline] ocfs2_page_mkwrite+0x222/0xed0 fs/ocfs2/mmap.c:122 do_page_mkwrite+0x19a/0x480 mm/memory.c:3162 do_shared_fault mm/memory.c:5373 [inline] do_fault mm/memory.c:5435 [inline] do_pte_missing mm/memory.c:3965 [inline] handle_pte_fault+0x11fa/0x6800 mm/memory.c:5766 __handle_mm_fault mm/memory.c:5909 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6077 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] _inline_copy_to_user include/linux/uaccess.h:197 [inline] _copy_to_user+0x86/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] do_pipe2+0x109/0x310 fs/pipe.c:1026 __do_sys_pipe2 fs/pipe.c:1042 [inline] __se_sys_pipe2 fs/pipe.c:1040 [inline] __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1040 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 -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __might_fault+0xc6/0x120 mm/memory.c:6716 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145 ocfs2_fiemap_inline fs/ocfs2/extent_map.c:725 [inline] ocfs2_fiemap+0xc25/0xf80 fs/ocfs2/extent_map.c:762 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1bfa/0x2e40 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893 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 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ocfs2_page_mkwrite+0x346/0xed0 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x19a/0x480 mm/memory.c:3162 do_shared_fault mm/memory.c:5373 [inline] do_fault mm/memory.c:5435 [inline] do_pte_missing mm/memory.c:3965 [inline] handle_pte_fault+0x11fa/0x6800 mm/memory.c:5766 __handle_mm_fault mm/memory.c:5909 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6077 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] _inline_copy_to_user include/linux/uaccess.h:197 [inline] _copy_to_user+0x86/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] do_pipe2+0x109/0x310 fs/pipe.c:1026 __do_sys_pipe2 fs/pipe.c:1042 [inline] __se_sys_pipe2 fs/pipe.c:1040 [inline] __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1040 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: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> &mm->mmap_lock --> sb_pagefaults#5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_pagefaults#5); lock(&mm->mmap_lock); lock(sb_pagefaults#5); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 2 locks held by syz.6.1396/12248: #0: ffff88807cfd2798 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline] #0: ffff88807cfd2798 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:6114 [inline] #0: ffff88807cfd2798 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:6174 #1: ffff88802b6a2518 (sb_pagefaults#5){.+.+}-{0:0}, at: do_page_mkwrite+0x19a/0x480 mm/memory.c:3162 stack backtrace: CPU: 0 UID: 0 PID: 12248 Comm: syz.6.1396 Not tainted 6.12.0-rc5-syzkaller-00322-gb9021de3ec2f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __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:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ocfs2_page_mkwrite+0x346/0xed0 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x19a/0x480 mm/memory.c:3162 do_shared_fault mm/memory.c:5373 [inline] do_fault mm/memory.c:5435 [inline] do_pte_missing mm/memory.c:3965 [inline] handle_pte_fault+0x11fa/0x6800 mm/memory.c:5766 __handle_mm_fault mm/memory.c:5909 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6077 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] RIP: 0010:_inline_copy_to_user include/linux/uaccess.h:197 [inline] RIP: 0010:_copy_to_user+0x86/0xb0 lib/usercopy.c:26 Code: 70 76 d7 fc 4c 39 fb 72 3d 4c 39 eb 77 38 e8 01 74 d7 fc 4c 89 f7 44 89 e6 e8 26 35 41 fd 0f 01 cb 4c 89 ff 4c 89 e1 4c 89 f6 a4 0f 1f 00 49 89 cc 0f 01 ca 4c 89 e0 5b 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc9000f637dd0 EFLAGS: 00050256 RAX: ffffffff84bd6501 RBX: 0000000020000048 RCX: 0000000000000008 RDX: 0000000000000000 RSI: ffffc9000f637e60 RDI: 0000000020000040 RBP: ffffc9000f637ee0 R08: ffffc9000f637e67 R09: 1ffff92001ec6fcc R10: dffffc0000000000 R11: fffff52001ec6fcd R12: 0000000000000008 R13: 00007fffffffefff R14: ffffc9000f637e60 R15: 0000000020000040 copy_to_user include/linux/uaccess.h:225 [inline] do_pipe2+0x109/0x310 fs/pipe.c:1026 __do_sys_pipe2 fs/pipe.c:1042 [inline] __se_sys_pipe2 fs/pipe.c:1040 [inline] __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1040 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: 0033:0x7f80e937e719 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:00007f80ea0ee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000125 RAX: ffffffffffffffda RBX: 00007f80e9535f80 RCX: 00007f80e937e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f80e93f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f80e9535f80 R15: 00007ffddb1e6828 OCFS2: ERROR (device loop6): int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *, handle_t *, u32, u32, struct ocfs2_suballoc_result *): Chain allocator dinode 23 has 4294967295 used bits but only 16777215 total On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: Returning error to the calling process. (syz.6.1396,12248,0):ocfs2_claim_suballoc_bits:2038 ERROR: status = -5 (syz.6.1396,12248,0):__ocfs2_claim_clusters:2412 ERROR: status = -5 (syz.6.1396,12248,1):__ocfs2_claim_clusters:2420 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_local_alloc_new_window:1216 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_local_alloc_new_window:1241 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_local_alloc_slide_window:1315 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_local_alloc_slide_window:1334 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_reserve_local_alloc_bits:672 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_reserve_local_alloc_bits:710 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_reserve_clusters_with_limit:1170 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_reserve_clusters_with_limit:1219 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_convert_inline_data_to_extents:7080 ERROR: status = -5 (syz.6.1396,12248,1):ocfs2_try_to_write_inline_data:1563 ERROR: status = -5 (syz.6.1396,12248,0):ocfs2_write_begin_nolock:1675 ERROR: status = -5 (syz.6.1396,12248,0):__ocfs2_page_mkwrite:97 ERROR: status = -5 ocfs2: Unmounting device (7,6) on (node local) ---------------- Code disassembly (best guess): 0: 70 76 jo 0x78 2: d7 xlat %ds:(%rbx) 3: fc cld 4: 4c 39 fb cmp %r15,%rbx 7: 72 3d jb 0x46 9: 4c 39 eb cmp %r13,%rbx c: 77 38 ja 0x46 e: e8 01 74 d7 fc call 0xfcd77414 13: 4c 89 f7 mov %r14,%rdi 16: 44 89 e6 mov %r12d,%esi 19: e8 26 35 41 fd call 0xfd413544 1e: 0f 01 cb stac 21: 4c 89 ff mov %r15,%rdi 24: 4c 89 e1 mov %r12,%rcx 27: 4c 89 f6 mov %r14,%rsi * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 49 89 cc mov %rcx,%r12 32: 0f 01 ca clac 35: 4c 89 e0 mov %r12,%rax 38: 5b pop %rbx 39: 41 5c pop %r12 3b: 41 5d pop %r13 3d: 41 5e pop %r14 3f: 41 rex.B