overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. ====================================================== overlayfs: fs on './file0' does not support file handles, falling back to index=off. WARNING: possible circular locking dependency detected 4.14.307-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/16916 is trying to acquire lock: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] iterate_dir+0x387/0x5e0 fs/readdir.c:43 overlayfs: fs on './file0' does not support file handles, falling back to index=off. but task is already holding lock: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sb_writers#3){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1551 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_setattr+0x52/0x500 fs/overlayfs/inode.c:38 notify_change+0x56b/0xd10 fs/attr.c:315 chown_common+0x40b/0x4b0 fs/open.c:631 SYSC_fchownat fs/open.c:661 [inline] SyS_fchownat+0xf6/0x190 fs/open.c:641 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_write_killable+0x37/0xb0 kernel/locking/rwsem.c:68 iterate_dir+0x387/0x5e0 fs/readdir.c:43 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x2c5/0x430 fs/overlayfs/readdir.c:365 ovl_check_empty_dir+0x6e/0x200 fs/overlayfs/readdir.c:870 ovl_check_empty_and_clear+0x72/0xe0 fs/overlayfs/dir.c:306 ovl_rename+0x57d/0xe50 fs/overlayfs/dir.c:959 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 6 locks held by syz-executor.3/16916: #0: (sb_writers#27){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#27){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&type->s_vfs_rename_key#3){+.+.}, at: [] lock_rename+0x54/0x280 fs/namei.c:2889 #2: (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #2: (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [] lock_rename+0x132/0x280 fs/namei.c:2900 #3: (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #3: (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [] lock_rename+0x166/0x280 fs/namei.c:2901 #4: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] #4: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] vfs_rename+0xbd8/0x1820 fs/namei.c:4472 #5: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #5: (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 stack backtrace: CPU: 0 PID: 16916 Comm: syz-executor.3 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_write_killable+0x37/0xb0 kernel/locking/rwsem.c:68 iterate_dir+0x387/0x5e0 fs/readdir.c:43 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x2c5/0x430 fs/overlayfs/readdir.c:365 ovl_check_empty_dir+0x6e/0x200 fs/overlayfs/readdir.c:870 ovl_check_empty_and_clear+0x72/0xe0 fs/overlayfs/dir.c:306 ovl_rename+0x57d/0xe50 fs/overlayfs/dir.c:959 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7faa72b680f9 RSP: 002b:00007faa710da168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007faa72c87f80 RCX: 00007faa72b680f9 RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000020000100 RBP: 00007faa72bc3ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd7fc1480f R14: 00007faa710da300 R15: 0000000000022000 device lo entered promiscuous mode Y4`Ҙ: renamed from lo device lo entered promiscuous mode Y4`Ҙ: renamed from lo device lo entered promiscuous mode Y4`Ҙ: renamed from lo IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1677668302.470:73): pid=17185 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file1" dev="sda1" ino=14389 res=0 EXT4-fs (loop1): Ignoring removed nobh option EXT4-fs (loop1): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop1): Ignoring removed nobh option EXT4-fs (loop1): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop2): Ignoring removed nobh option EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop2): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop4): Ignoring removed nobh option EXT4-fs (loop4): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop2): 1 truncate cleaned up EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop1): Ignoring removed nobh option EXT4-fs (loop1): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop2): Ignoring removed nobh option EXT4-fs (loop2): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop4): Ignoring removed nobh option EXT4-fs (loop4): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop2): 1 truncate cleaned up EXT4-fs (loop2): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop1): Ignoring removed nobh option EXT4-fs (loop0): Ignoring removed nobh option EXT4-fs (loop2): Ignoring removed nobh option EXT4-fs (loop1): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop2): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop1): 1 truncate cleaned up EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop1): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop2): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop0): Ignoring removed nobh option EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop4): Ignoring removed nobh option EXT4-fs (loop4): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue EXT4-fs (loop0): Ignoring removed nobh option EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Opts: nobh,noblock_validity,bsdgroups,noload,data_err=ignore,usrjquota=,,errors=continue NILFS (loop4): invalid segment: Checksum error in segment payload NILFS (loop4): trying rollback from an earlier position NILFS (loop4): recovery complete NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop5): trying rollback from an earlier position NILFS (loop4): invalid segment: Checksum error in segment payload NILFS (loop4): trying rollback from an earlier position NILFS (loop5): recovery complete NILFS (loop4): recovery complete NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop5): trying rollback from an earlier position NILFS (loop4): invalid segment: Checksum error in segment payload audit: type=1804 audit(1677668306.230:74): pid=17465 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2088917793/syzkaller.U8aPPB/234/bus/bus" dev="loop2" ino=8 res=1 NILFS (loop5): recovery complete NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop4): trying rollback from an earlier position NILFS (loop4): recovery complete NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1804 audit(1677668306.560:75): pid=17485 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2088917793/syzkaller.U8aPPB/235/bus/bus" dev="loop2" ino=8 res=1 NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop5): trying rollback from an earlier position NILFS (loop5): recovery complete NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop4): invalid segment: Checksum error in segment payload BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents NILFS (loop4): trying rollback from an earlier position NILFS (loop4): recovery complete NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1804 audit(1677668306.910:76): pid=17519 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2088917793/syzkaller.U8aPPB/236/bus/bus" dev="loop2" ino=8 res=1 audit: type=1804 audit(1677668307.180:77): pid=17567 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2088917793/syzkaller.U8aPPB/237/bus/bus" dev="loop2" ino=8 res=1 BTRFS info (device loop1): setting 2 feature flag BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents