EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. ext4 filesystem being mounted at /root/syzkaller-testdir2431605595/syzkaller.yZVKDs/340/file0 supports timestamps until 2038 (0x7fffffff) ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc2-syzkaller-00235-g8d3c682a5e3d #0 Not tainted ------------------------------------------------------ syz-executor.1/15935 is trying to acquire lock: ffff8880168e23b8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline] ffff8880168e23b8 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0x6f5/0x2870 fs/ext4/inode.c:5548 but task is already holding lock: ffff8880168e2218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff8880168e2218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: do_truncate+0x131/0x200 fs/open.c:64 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: down_write+0x92/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1525 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1608 [inline] ext4_xattr_set_entry+0x2b19/0x39e0 fs/ext4/xattr.c:1737 ext4_xattr_ibody_set+0x131/0x3a0 fs/ext4/xattr.c:2289 ext4_xattr_set_handle+0x968/0x1510 fs/ext4/xattr.c:2446 ext4_xattr_set+0x144/0x360 fs/ext4/xattr.c:2560 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:203 __vfs_setxattr_noperm+0x129/0x5f0 fs/xattr.c:237 __vfs_setxattr_locked+0x1d3/0x260 fs/xattr.c:298 vfs_setxattr+0x143/0x340 fs/xattr.c:324 do_setxattr+0x147/0x190 fs/xattr.c:609 setxattr+0x146/0x160 fs/xattr.c:632 path_setxattr+0x197/0x1c0 fs/xattr.c:651 __do_sys_lsetxattr fs/xattr.c:674 [inline] __se_sys_lsetxattr fs/xattr.c:670 [inline] __x64_sys_lsetxattr+0xc1/0x160 fs/xattr.c:670 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&ei->xattr_sem){++++}-{3:3}: down_write+0x92/0x200 kernel/locking/rwsem.c:1573 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_inline_data_truncate+0x1a8/0xd70 fs/ext4/inline.c:1932 ext4_truncate+0x992/0x1340 fs/ext4/inode.c:4298 ext4_setattr+0x1b27/0x2870 fs/ext4/inode.c:5625 notify_change+0xb2c/0x1180 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:66 do_sys_ftruncate+0x53a/0x770 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (mapping.invalidate_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056 lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 down_write+0x92/0x200 kernel/locking/rwsem.c:1573 filemap_invalidate_lock include/linux/fs.h:803 [inline] ext4_setattr+0x6f5/0x2870 fs/ext4/inode.c:5548 notify_change+0xb2c/0x1180 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:66 handle_truncate fs/namei.c:3219 [inline] do_open fs/namei.c:3564 [inline] path_openat+0x2083/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_creat fs/open.c:1440 [inline] __se_sys_creat fs/open.c:1434 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: mapping.invalidate_lock --> &ei->xattr_sem --> &ea_inode->i_rwsem#8/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ea_inode->i_rwsem#8/1); lock(&ei->xattr_sem); lock(&ea_inode->i_rwsem#8/1); lock(mapping.invalidate_lock); *** DEADLOCK *** 2 locks held by syz-executor.1/15935: #0: ffff888028850460 (sb_writers#4){.+.+}-{0:0}, at: do_open fs/namei.c:3553 [inline] #0: ffff888028850460 (sb_writers#4){.+.+}-{0:0}, at: path_openat+0x19a4/0x2750 fs/namei.c:3715 #1: ffff8880168e2218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff8880168e2218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: do_truncate+0x131/0x200 fs/open.c:64 stack backtrace: CPU: 0 PID: 15935 Comm: syz-executor.1 Not tainted 6.3.0-rc2-syzkaller-00235-g8d3c682a5e3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056 lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 down_write+0x92/0x200 kernel/locking/rwsem.c:1573 filemap_invalidate_lock include/linux/fs.h:803 [inline] ext4_setattr+0x6f5/0x2870 fs/ext4/inode.c:5548 notify_change+0xb2c/0x1180 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:66 handle_truncate fs/namei.c:3219 [inline] do_open fs/namei.c:3564 [inline] path_openat+0x2083/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_creat fs/open.c:1440 [inline] __se_sys_creat fs/open.c:1434 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f49d648c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f49d7114168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f49d65abf80 RCX: 00007f49d648c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f49d64e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfb24e5bf R14: 00007f49d7114300 R15: 0000000000022000