====================================================== WARNING: possible circular locking dependency detected 6.11.0-rc6-syzkaller-00326-gd1f2d51b711a #0 Not tainted ------------------------------------------------------ syz-executor427/5138 is trying to acquire lock: ffff8880127d95a8 (&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: ffff888041d7a2e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x96f/0x18d0 fs/ocfs2/aops.c:2224 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:5759 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:1980 ocfs2_lookup_ino_from_name+0xb1/0x1e0 fs/ocfs2/dir.c:2002 _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+0x3068/0x5880 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:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 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:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __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_local_alloc_bits+0x107/0x2870 fs/ocfs2/localalloc.c:627 ocfs2_reserve_clusters_with_limit+0x1b8/0xb60 fs/ocfs2/suballoc.c:1166 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1227 [inline] ocfs2_lock_allocators+0x30a/0x630 fs/ocfs2/suballoc.c:2746 ocfs2_write_begin_nolock+0x2916/0x4d30 fs/ocfs2/aops.c:1739 ocfs2_dio_wr_get_block+0xc3b/0x18d0 fs/ocfs2/aops.c:2238 get_more_blocks fs/direct-io.c:649 [inline] do_direct_IO fs/direct-io.c:937 [inline] __blockdev_direct_IO+0x1c90/0x4890 fs/direct-io.c:1249 ocfs2_direct_IO+0x257/0x2c0 fs/ocfs2/aops.c:2465 generic_file_direct_write+0x130/0x350 mm/filemap.c:3941 __generic_file_write_iter+0x129/0x230 mm/filemap.c:4107 ocfs2_file_write_iter+0x17b4/0x1f60 fs/ocfs2/file.c:2455 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev2 fs/read_write.c:1131 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1122 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-executor427/5138: #0: ffff88803f826420 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff88803f826420 (sb_writers#9){.+.+}-{0:0}, at: vfs_writev+0x2d4/0xbb0 fs/read_write.c:969 #1: ffff888041d7a640 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #1: ffff888041d7a640 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x46a/0x1f60 fs/ocfs2/file.c:2387 #2: ffff888041d7a2e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x96f/0x18d0 fs/ocfs2/aops.c:2224 stack backtrace: CPU: 0 UID: 0 PID: 5138 Comm: syz-executor427 Not tainted 6.11.0-rc6-syzkaller-00326-gd1f2d51b711a #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:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186 check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __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_local_alloc_bits+0x107/0x2870 fs/ocfs2/localalloc.c:627 ocfs2_reserve_clusters_with_limit+0x1b8/0xb60 fs/ocfs2/suballoc.c:1166 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1227 [inline] ocfs2_lock_allocators+0x30a/0x630 fs/ocfs2/suballoc.c:2746 ocfs2_write_begin_nolock+0x2916/0x4d30 fs/ocfs2/aops.c:1739 ocfs2_dio_wr_get_block+0xc3b/0x18d0 fs/ocfs2/aops.c:2238 get_more_blocks fs/direct-io.c:649 [inline] do_direct_IO fs/direct-io.c:937 [inline] __blockdev_direct_IO+0x1c90/0x4890 fs/direct-io.c:1249 ocfs2_direct_IO+0x257/0x2c0 fs/ocfs2/aops.c:2465 generic_file_direct_write+0x130/0x350 mm/filemap.c:3941 __generic_file_write_iter+0x129/0x230 mm/filemap.c:4107 ocfs2_file_write_iter+0x17b4/0x1f60 fs/ocfs2/file.c:2455 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev2 fs/read_write.c:1131 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1122 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: 0033:0x7f77bff18169 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:00007ffce4c75ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f77bff18169 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007c00 R11: 0000000000000246 R12: 00007ffce4c75f00 R13: 00007ffce4c75f40 R14: 0000000001000000 R15: 0000000000000003