ocfs2: Mounting device (7,5) on (node local, slot 0) with writeback data mode. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc5-next-20250708-syzkaller #0 Not tainted ------------------------------------------------------ syz.5.5861/22792 is trying to acquire lock: ffff88807e6b6a20 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_page_mkwrite+0x2ff/0xc40 fs/ocfs2/mmap.c:142 but task is already holding lock: ffff888059124520 (sb_pagefaults#9){.+.+}-{0:0}, at: do_page_mkwrite+0x14a/0x310 mm/memory.c:3367 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_pagefaults#9){.+.+}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs.h:1798 [inline] sb_start_pagefault include/linux/fs.h:1963 [inline] ocfs2_page_mkwrite+0x1da/0xc40 fs/ocfs2/mmap.c:122 do_page_mkwrite+0x14a/0x310 mm/memory.c:3367 wp_page_shared mm/memory.c:3768 [inline] do_wp_page+0x268d/0x5800 mm/memory.c:3987 handle_pte_fault mm/memory.c:6074 [inline] __handle_mm_fault+0x1033/0x5440 mm/memory.c:6201 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6370 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:68 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] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185 copy_page_to_iter+0x10c/0x1c0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:204 [inline] filemap_read+0x7c0/0x11a0 mm/filemap.c:2763 ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __might_fault+0xcc/0x130 mm/memory.c:6960 _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+0x1c0/0x390 fs/ioctl.c:145 ocfs2_fiemap+0x888/0xc90 fs/ocfs2/extent_map.c:806 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1170/0x1430 fs/ioctl.c:532 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1592 ocfs2_page_mkwrite+0x2ff/0xc40 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x14a/0x310 mm/memory.c:3367 wp_page_shared mm/memory.c:3768 [inline] do_wp_page+0x268d/0x5800 mm/memory.c:3987 handle_pte_fault mm/memory.c:6074 [inline] __handle_mm_fault+0x1033/0x5440 mm/memory.c:6201 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6370 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:68 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] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185 copy_page_to_iter+0x10c/0x1c0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:204 [inline] filemap_read+0x7c0/0x11a0 mm/filemap.c:2763 ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 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#9 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_pagefaults#9); lock(&mm->mmap_lock); lock(sb_pagefaults#9); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 3 locks held by syz.5.5861/22792: #0: ffff888053da75f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1232 #1: ffff888031ac9fe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:431 [inline] #1: ffff888031ac9fe0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:188 [inline] #1: ffff888031ac9fe0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x300 mm/mmap_lock.c:248 #2: ffff888059124520 (sb_pagefaults#9){.+.+}-{0:0}, at: do_page_mkwrite+0x14a/0x310 mm/memory.c:3367 stack backtrace: CPU: 1 UID: 0 PID: 22792 Comm: syz.5.5861 Not tainted 6.16.0-rc5-next-20250708-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1592 ocfs2_page_mkwrite+0x2ff/0xc40 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x14a/0x310 mm/memory.c:3367 wp_page_shared mm/memory.c:3768 [inline] do_wp_page+0x268d/0x5800 mm/memory.c:3987 handle_pte_fault mm/memory.c:6074 [inline] __handle_mm_fault+0x1033/0x5440 mm/memory.c:6201 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6370 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc9000bad76f8 EFLAGS: 00050206 RAX: ffffffff84c43401 RBX: ffff888083cd4000 RCX: 0000000000001000 RDX: 0000000000000000 RSI: ffff888083cd4000 RDI: 0000200000001a40 RBP: ffffc9000bad7848 R08: ffff888083cd4fff R09: 1ffff1101079a9ff R10: dffffc0000000000 R11: ffffed101079aa00 R12: 1ffff9200175afaf R13: 0000200000001a40 R14: ffffc9000bad7d88 R15: 0000000000001000 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] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185 copy_page_to_iter+0x10c/0x1c0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:204 [inline] filemap_read+0x7c0/0x11a0 mm/filemap.c:2763 ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7bcf8e929 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:00007fd7bddad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fd7bd1b5fa0 RCX: 00007fd7bcf8e929 RDX: 0000000000002020 RSI: 0000200000001a40 RDI: 0000000000000004 RBP: 00007fd7bd010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd7bd1b5fa0 R15: 00007ffcae9a3ab8 OCFS2: ERROR (device loop5): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 8, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. (syz.5.5861,22792,1):ocfs2_get_clusters:634 ERROR: status = -30 (syz.5.5861,22792,1):ocfs2_populate_write_desc:1385 ERROR: status = -30 (syz.5.5861,22792,1):ocfs2_write_begin_nolock:1691 ERROR: status = -30 (syz.5.5861,22792,1):__ocfs2_page_mkwrite:97 ERROR: status = -30 OCFS2: ERROR (device loop5): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 8, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.5.5861,22792,1):ocfs2_get_clusters:634 ERROR: status = -30 (syz.5.5861,22792,1):ocfs2_populate_write_desc:1385 ERROR: status = -30 (syz.5.5861,22792,1):ocfs2_write_begin_nolock:1691 ERROR: status = -30 (syz.5.5861,22792,1):__ocfs2_page_mkwrite:97 ERROR: status = -30 ---------------- Code disassembly (best guess): 0: cc int3 1: cc int3 2: cc int3 3: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 00 nopl (%rax) 10: 48 8b 06 mov (%rsi),%rax 13: 48 89 07 mov %rax,(%rdi) 16: 48 83 c6 08 add $0x8,%rsi 1a: 48 83 c7 08 add $0x8,%rdi 1e: 83 e9 08 sub $0x8,%ecx 21: 74 db je 0xfffffffe 23: 83 f9 08 cmp $0x8,%ecx 26: 73 e8 jae 0x10 28: eb c5 jmp 0xffffffef * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: c3 ret 2d: cc int3 2e: cc int3 2f: cc int3 30: cc int3 31: 48 8b 06 mov (%rsi),%rax 34: 48 89 07 mov %rax,(%rdi) 37: 48 8d 47 08 lea 0x8(%rdi),%rax 3b: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 3f: 48 rex.W