loop0: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.11.0-syzkaller-08829-gaf9c191ac2a0 #0 Not tainted ------------------------------------------------------ syz-executor602/5114 is trying to acquire lock: ffff888011d895a8 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x18f/0x7b0 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff88803f3a22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7ff/0xfd0 fs/ocfs2/file.c:2004 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ocfs2_read_virt_blocks+0x2ca/0xa50 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+0x43b/0x2780 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0xff/0x360 fs/ocfs2/dir.c:1981 ocfs2_lookup_ino_from_name+0xb1/0x1e0 fs/ocfs2/dir.c:2003 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x305/0x7b0 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x32c/0x730 fs/ocfs2/super.c:457 ocfs2_initialize_super fs/ocfs2/super.c:2250 [inline] ocfs2_fill_super+0x2f47/0x5750 fs/ocfs2/super.c:994 mount_bdev+0x20a/0x2d0 fs/super.c:1679 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 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 (&osb->system_file_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ocfs2_get_system_file_inode+0x18f/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x16f/0x4eb0 fs/ocfs2/suballoc.c:780 ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0 fs/ocfs2/suballoc.c:982 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1025 [inline] ocfs2_lock_allocators+0x2a9/0x630 fs/ocfs2/suballoc.c:2735 ocfs2_extend_allocation+0x4ed/0x1c20 fs/ocfs2/file.c:589 ocfs2_allocate_unwritten_extents+0x398/0x9f0 fs/ocfs2/file.c:1493 __ocfs2_change_file_space+0x97d/0xfd0 fs/ocfs2/file.c:2012 ocfs2_fallocate+0x2e4/0x350 fs/ocfs2/file.c:2127 vfs_fallocate+0x569/0x6e0 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:362 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); *** DEADLOCK *** 3 locks held by syz-executor602/5114: #0: ffff88803dfd6420 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline] #0: ffff88803dfd6420 (sb_writers#9){.+.+}-{0:0}, at: vfs_fallocate+0x4fe/0x6e0 fs/open.c:332 #1: ffff88803f3a2640 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff88803f3a2640 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __ocfs2_change_file_space+0x201/0xfd0 fs/ocfs2/file.c:1938 #2: ffff88803f3a22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7ff/0xfd0 fs/ocfs2/file.c:2004 stack backtrace: CPU: 0 UID: 0 PID: 5114 Comm: syz-executor602 Not tainted 6.11.0-syzkaller-08829-gaf9c191ac2a0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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:2203 check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ocfs2_get_system_file_inode+0x18f/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x16f/0x4eb0 fs/ocfs2/suballoc.c:780 ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0 fs/ocfs2/suballoc.c:982 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1025 [inline] ocfs2_lock_allocators+0x2a9/0x630 fs/ocfs2/suballoc.c:2735 ocfs2_extend_allocation+0x4ed/0x1c20 fs/ocfs2/file.c:589 ocfs2_allocate_unwritten_extents+0x398/0x9f0 fs/ocfs2/file.c:1493 __ocfs2_change_file_space+0x97d/0xfd0 fs/ocfs2/file.c:2012 ocfs2_fallocate+0x2e4/0x350 fs/ocfs2/file.c:2127 vfs_fallocate+0x569/0x6e0 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:362 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: 0033:0x7fb38e6a2169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe8ec09c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb38e6a2169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000ffffffff R08: 00000000010008d0 R09: 00000000010008d0 R10: 00000000001000f4 R11: 0000000000000246 R12: 00007ffe8ec09cc0 R13: 00007ffe8ec09d00 R14: 0000000001000000 R15: 0000000000000003