ocfs2: Mounting device (7,3) on (node local, slot 0) with writeback data mode. ====================================================== WARNING: possible circular locking dependency detected 6.1.148-syzkaller #0 Not tainted ------------------------------------------------------ syz.3.54/4666 is trying to acquire lock: ffff0000e2338660 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_page_mkwrite+0x328/0xbf4 fs/ocfs2/mmap.c:142 but task is already holding lock: ffff0000d1c08558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x13c/0x358 mm/memory.c:3011 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (sb_pagefaults#2){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_pagefault include/linux/fs.h:1995 [inline] ocfs2_page_mkwrite+0x194/0xbf4 fs/ocfs2/mmap.c:122 do_page_mkwrite+0x13c/0x358 mm/memory.c:3011 wp_page_shared+0x148/0x550 mm/memory.c:3360 do_wp_page+0xca0/0xef0 mm/memory.c:3510 handle_pte_fault mm/memory.c:5049 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x133c/0x2fd4 mm/memory.c:5294 __do_page_fault arch/arm64/mm/fault.c:499 [inline] do_page_fault+0x310/0x99c arch/arm64/mm/fault.c:583 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:803 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:580 __arch_copy_to_user+0x190/0x234 arch/arm64/lib/copy_template.S:158 _copy_to_iter+0x42c/0xe84 lib/iov_iter.c:527 copy_to_iter include/linux/uio.h:179 [inline] simple_copy_to_iter+0x5c/0x80 net/core/datagram.c:521 __skb_datagram_iter+0x2c8/0x680 net/core/datagram.c:449 skb_copy_datagram_iter+0x124/0x33c net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:3979 [inline] tcp_recvmsg_locked+0x6c0/0x1ba4 net/ipv4/tcp.c:2642 tcp_recvmsg+0x18c/0x694 net/ipv4/tcp.c:2720 inet_recvmsg+0x110/0x1b8 net/ipv4/af_inet.c:890 sock_recvmsg_nosec net/socket.c:1022 [inline] sock_recvmsg net/socket.c:1040 [inline] __sys_recvfrom+0x2a4/0x3bc net/socket.c:2205 __do_sys_recvfrom net/socket.c:2223 [inline] __se_sys_recvfrom net/socket.c:2219 [inline] __arm64_sys_recvfrom+0xd8/0xf8 net/socket.c:2219 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #3 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc4/0x124 mm/memory.c:5852 _copy_to_user include/linux/uaccess.h:143 [inline] copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x15c/0x3b4 fs/ioctl.c:144 ocfs2_fiemap_inline fs/ocfs2/extent_map.c:725 [inline] ocfs2_fiemap+0x75c/0x9b0 fs/ocfs2/extent_map.c:762 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1694/0x206c fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #2 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x244/0x8e0 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x318/0x1c5c fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0x128/0x410 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x60/0x114 fs/ocfs2/dir.c:2017 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x2b8/0x644 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x2a8/0x594 fs/ocfs2/super.c:457 ocfs2_initialize_super fs/ocfs2/super.c:2253 [inline] ocfs2_fill_super+0x210c/0x3e98 fs/ocfs2/super.c:994 mount_bdev+0x264/0x358 fs/super.c:1443 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3063 path_mount+0x5b4/0xe78 fs/namespace.c:3393 do_mount fs/namespace.c:3406 [inline] __do_sys_mount fs/namespace.c:3614 [inline] __se_sys_mount fs/namespace.c:3591 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3591 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #1 (&osb->system_file_mutex){+.+.}-{3:3}: __mutex_lock_common+0x190/0x1f38 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 ocfs2_get_system_file_inode+0x15c/0x644 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x11c/0x3cd4 fs/ocfs2/suballoc.c:776 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1128 [inline] ocfs2_reserve_clusters_with_limit+0x290/0x9e0 fs/ocfs2/suballoc.c:1173 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2669 ocfs2_extend_allocation+0x328/0x15ec fs/ocfs2/file.c:585 ocfs2_allocate_unwritten_extents+0x26c/0x698 fs/ocfs2/file.c:1496 __ocfs2_change_file_space+0x798/0xc24 fs/ocfs2/file.c:2023 ocfs2_fallocate+0x1f0/0x224 fs/ocfs2/file.c:2138 vfs_fallocate+0x4a4/0x5f4 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __arm64_sys_fallocate+0xc0/0x110 fs/open.c:352 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&oi->ip_alloc_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_page_mkwrite+0x328/0xbf4 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x13c/0x358 mm/memory.c:3011 wp_page_shared+0x148/0x550 mm/memory.c:3360 do_wp_page+0xca0/0xef0 mm/memory.c:3510 handle_pte_fault mm/memory.c:5049 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x133c/0x2fd4 mm/memory.c:5294 __do_page_fault arch/arm64/mm/fault.c:499 [inline] do_page_fault+0x310/0x99c arch/arm64/mm/fault.c:583 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:803 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:580 __arch_copy_to_user+0x190/0x234 arch/arm64/lib/copy_template.S:158 _copy_to_iter+0x42c/0xe84 lib/iov_iter.c:527 copy_to_iter include/linux/uio.h:179 [inline] simple_copy_to_iter+0x5c/0x80 net/core/datagram.c:521 __skb_datagram_iter+0x2c8/0x680 net/core/datagram.c:449 skb_copy_datagram_iter+0x124/0x33c net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:3979 [inline] tcp_recvmsg_locked+0x6c0/0x1ba4 net/ipv4/tcp.c:2642 tcp_recvmsg+0x18c/0x694 net/ipv4/tcp.c:2720 inet_recvmsg+0x110/0x1b8 net/ipv4/af_inet.c:890 sock_recvmsg_nosec net/socket.c:1022 [inline] sock_recvmsg net/socket.c:1040 [inline] __sys_recvfrom+0x2a4/0x3bc net/socket.c:2205 __do_sys_recvfrom net/socket.c:2223 [inline] __se_sys_recvfrom net/socket.c:2219 [inline] __arm64_sys_recvfrom+0xd8/0xf8 net/socket.c:2219 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> &mm->mmap_lock --> sb_pagefaults#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#2); lock(&mm->mmap_lock); lock(sb_pagefaults#2); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 3 locks held by syz.3.54/4666: #0: ffff0000cdad8d70 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1756 [inline] #0: ffff0000cdad8d70 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_recvmsg+0x170/0x694 net/ipv4/tcp.c:2719 #1: ffff0000cc949348 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff0000cc949348 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5322 [inline] #1: ffff0000cc949348 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x38/0x2e8 mm/memory.c:5384 #2: ffff0000d1c08558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x13c/0x358 mm/memory.c:3011 stack backtrace: CPU: 0 PID: 4666 Comm: syz.3.54 Not tainted 6.1.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048 check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_page_mkwrite+0x328/0xbf4 fs/ocfs2/mmap.c:142 do_page_mkwrite+0x13c/0x358 mm/memory.c:3011 wp_page_shared+0x148/0x550 mm/memory.c:3360 do_wp_page+0xca0/0xef0 mm/memory.c:3510 handle_pte_fault mm/memory.c:5049 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x133c/0x2fd4 mm/memory.c:5294 __do_page_fault arch/arm64/mm/fault.c:499 [inline] do_page_fault+0x310/0x99c arch/arm64/mm/fault.c:583 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:803 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:580 __arch_copy_to_user+0x190/0x234 arch/arm64/lib/copy_template.S:158 _copy_to_iter+0x42c/0xe84 lib/iov_iter.c:527 copy_to_iter include/linux/uio.h:179 [inline] simple_copy_to_iter+0x5c/0x80 net/core/datagram.c:521 __skb_datagram_iter+0x2c8/0x680 net/core/datagram.c:449 skb_copy_datagram_iter+0x124/0x33c net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:3979 [inline] tcp_recvmsg_locked+0x6c0/0x1ba4 net/ipv4/tcp.c:2642 tcp_recvmsg+0x18c/0x694 net/ipv4/tcp.c:2720 inet_recvmsg+0x110/0x1b8 net/ipv4/af_inet.c:890 sock_recvmsg_nosec net/socket.c:1022 [inline] sock_recvmsg net/socket.c:1040 [inline] __sys_recvfrom+0x2a4/0x3bc net/socket.c:2205 __do_sys_recvfrom net/socket.c:2223 [inline] __se_sys_recvfrom net/socket.c:2219 [inline] __arm64_sys_recvfrom+0xd8/0xf8 net/socket.c:2219 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 OCFS2: ERROR (device loop3): 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.3.54,4666,0):ocfs2_get_clusters:624 ERROR: status = -30 (syz.3.54,4666,0):ocfs2_populate_write_desc:1407 ERROR: status = -30 (syz.3.54,4666,0):ocfs2_write_begin_nolock:1712 ERROR: status = -30 (syz.3.54,4666,0):__ocfs2_page_mkwrite:97 ERROR: status = -30