ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 5.15.179-syzkaller #0 Not tainted ------------------------------------------------------ syz.1.789/7128 is trying to acquire lock: ffff0000e92e5be0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_page_mkwrite+0x400/0xf0c fs/ocfs2/mmap.c:142 but task is already holding lock: ffff0000d1eb6558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2922 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_pagefaults#2){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_pagefault include/linux/fs.h:1910 [inline] ocfs2_page_mkwrite+0x250/0xf0c fs/ocfs2/mmap.c:122 do_page_mkwrite+0x144/0x37c mm/memory.c:2922 wp_page_shared+0x14c/0x398 mm/memory.c:3259 do_wp_page+0x7cc/0x9c4 mm/memory.c:3360 handle_pte_fault mm/memory.c:4668 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1bdc/0x33a8 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x39c/0x92c mm/gup.c:1197 faultin_vma_page_range+0x1d8/0x268 mm/gup.c:1590 madvise_populate mm/madvise.c:856 [inline] madvise_vma mm/madvise.c:1004 [inline] do_madvise+0xda8/0x2c70 mm/madvise.c:1207 __do_sys_madvise mm/madvise.c:1233 [inline] __se_sys_madvise mm/madvise.c:1231 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1231 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc8/0x128 mm/memory.c:5357 _copy_to_user include/linux/uaccess.h:174 [inline] copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x1b4/0x44c fs/ioctl.c:144 ocfs2_fiemap_inline fs/ocfs2/extent_map.c:725 [inline] ocfs2_fiemap+0x994/0xc78 fs/ocfs2/extent_map.c:762 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1bcc/0x2a38 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ocfs2_page_mkwrite+0x400/0xf0c fs/ocfs2/mmap.c:142 do_page_mkwrite+0x144/0x37c mm/memory.c:2922 wp_page_shared+0x14c/0x398 mm/memory.c:3259 do_wp_page+0x7cc/0x9c4 mm/memory.c:3360 handle_pte_fault mm/memory.c:4668 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1bdc/0x33a8 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x39c/0x92c mm/gup.c:1197 faultin_vma_page_range+0x1d8/0x268 mm/gup.c:1590 madvise_populate mm/madvise.c:856 [inline] madvise_vma mm/madvise.c:1004 [inline] do_madvise+0xda8/0x2c70 mm/madvise.c:1207 __do_sys_madvise mm/madvise.c:1233 [inline] __se_sys_madvise mm/madvise.c:1231 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1231 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> &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(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 2 locks held by syz.1.789/7128: #0: ffff0000d1f1dd18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock+0x28/0x74 include/linux/mmap_lock.h:117 #1: ffff0000d1eb6558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2922 stack backtrace: CPU: 1 PID: 7128 Comm: syz.1.789 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ocfs2_page_mkwrite+0x400/0xf0c fs/ocfs2/mmap.c:142 do_page_mkwrite+0x144/0x37c mm/memory.c:2922 wp_page_shared+0x14c/0x398 mm/memory.c:3259 do_wp_page+0x7cc/0x9c4 mm/memory.c:3360 handle_pte_fault mm/memory.c:4668 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1bdc/0x33a8 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x39c/0x92c mm/gup.c:1197 faultin_vma_page_range+0x1d8/0x268 mm/gup.c:1590 madvise_populate mm/madvise.c:856 [inline] madvise_vma mm/madvise.c:1004 [inline] do_madvise+0xda8/0x2c70 mm/madvise.c:1207 __do_sys_madvise mm/madvise.c:1233 [inline] __se_sys_madvise mm/madvise.c:1231 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1231 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584