F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5 ====================================================== WARNING: possible circular locking dependency detected 6.5.0-syzkaller-04808-g6c1b980a7e79 #0 Not tainted ------------------------------------------------------ syz-executor.2/6506 is trying to acquire lock: ffff8880406bfac0 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] ffff8880406bfac0 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_getxattr+0xb8/0x1460 fs/f2fs/xattr.c:532 but task is already holding lock: ffff8880406b0e00 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] ffff8880406b0e00 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_add_regular_entry+0x8f2/0xe30 fs/f2fs/dir.c:739 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&fi->i_sem){+.+.}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] f2fs_add_inline_entry+0x3a8/0x760 fs/f2fs/inline.c:644 f2fs_add_dentry+0xba/0x1e0 fs/f2fs/dir.c:784 f2fs_do_add_link+0x21e/0x340 fs/f2fs/dir.c:827 f2fs_add_link fs/f2fs/f2fs.h:3556 [inline] f2fs_mkdir+0x2f5/0x530 fs/f2fs/namei.c:781 vfs_mkdir+0x29d/0x450 fs/namei.c:4120 do_mkdirat+0x264/0x520 fs/namei.c:4143 __do_sys_mkdirat fs/namei.c:4158 [inline] __se_sys_mkdirat fs/namei.c:4156 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4156 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&fi->i_xattr_sem){.+.+}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5136 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753 down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0xb8/0x1460 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x52/0x8e0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0xd7/0x9a0 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x824/0x1180 fs/f2fs/dir.c:558 f2fs_add_regular_entry+0x904/0xe30 fs/f2fs/dir.c:740 f2fs_add_dentry+0xf7/0x1e0 fs/f2fs/dir.c:788 f2fs_do_add_link+0x21e/0x340 fs/f2fs/dir.c:827 f2fs_add_link fs/f2fs/f2fs.h:3556 [inline] f2fs_create+0x32c/0x530 fs/f2fs/namei.c:377 lookup_open fs/namei.c:3495 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0x13e7/0x3180 fs/namei.c:3793 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&fi->i_sem); lock(&fi->i_xattr_sem); lock(&fi->i_sem); rlock(&fi->i_xattr_sem); *** DEADLOCK *** 4 locks held by syz-executor.2/6506: #0: ffff88807f2ae410 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:403 #1: ffff8880406bf448 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff8880406bf448 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3560 [inline] #1: ffff8880406bf448 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: path_openat+0x7c2/0x3180 fs/namei.c:3793 #2: ffff888078ecc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] #2: ffff888078ecc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2151 [inline] #2: ffff888078ecc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_create+0x274/0x530 fs/f2fs/namei.c:376 #3: ffff8880406b0e00 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] #3: ffff8880406b0e00 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_add_regular_entry+0x8f2/0xe30 fs/f2fs/dir.c:739 stack backtrace: CPU: 1 PID: 6506 Comm: syz-executor.2 Not tainted 6.5.0-syzkaller-04808-g6c1b980a7e79 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x375/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5136 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753 down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0xb8/0x1460 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x52/0x8e0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0xd7/0x9a0 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x824/0x1180 fs/f2fs/dir.c:558 f2fs_add_regular_entry+0x904/0xe30 fs/f2fs/dir.c:740 f2fs_add_dentry+0xf7/0x1e0 fs/f2fs/dir.c:788 f2fs_do_add_link+0x21e/0x340 fs/f2fs/dir.c:827 f2fs_add_link fs/f2fs/f2fs.h:3556 [inline] f2fs_create+0x32c/0x530 fs/f2fs/namei.c:377 lookup_open fs/namei.c:3495 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0x13e7/0x3180 fs/namei.c:3793 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f41d427cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f41d4f430c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f41d439bf80 RCX: 00007f41d427cae9 RDX: 000000000000275a RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f41d42c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f41d439bf80 R15: 00007fff9d32dcc8