====================================================== WARNING: possible circular locking dependency detected 4.14.307-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/10762 is trying to acquire lock: (sb_writers#6){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] (sb_writers#6){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 but task is already holding lock: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] (&ovl_i_mutex_dir_key[depth]){++++}, at: [] do_last fs/namei.c:3331 [inline] (&ovl_i_mutex_dir_key[depth]){++++}, at: [] path_openat+0xde2/0x2970 fs/namei.c:3571 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: 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 EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # 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 -> #0 (sb_writers#6){.+.+}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 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_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 EXT4-fs (loop2): no journal found do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 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(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#6); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#6); *** DEADLOCK *** 2 locks held by syz-executor.3/10762: #0: (sb_writers#15){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#15){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] do_last fs/namei.c:3331 [inline] #1: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] path_openat+0xde2/0x2970 fs/namei.c:3571 stack backtrace: CPU: 1 PID: 10762 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 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_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f0924cfa0f9 RSP: 002b:00007f092326c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f0924e19f80 RCX: 00007f0924cfa0f9 RDX: 000000000000275a RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f0924d55ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa35dc9ff R14: 00007f092326c300 R15: 0000000000022000 print_req_error: I/O error, dev loop2, sector 0 Buffer I/O error on dev loop2, logical block 0, async page read print_req_error: I/O error, dev loop2, sector 6 Buffer I/O error on dev loop2, logical block 3, async page read EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # EXT4-fs (loop1): no journal found EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs (loop2): no journal found EXT4-fs (loop0): no journal found EXT4-fs (loop4): no journal found EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs (loop1): no journal found EXT4-fs (loop0): no journal found EXT4-fs (loop2): no journal found EXT4-fs (loop5): no journal found EXT4-fs (loop4): no journal found Bluetooth: hci0 command 0x0c26 tx timeout EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop3): no journal found EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop5): no journal found EXT4-fs (loop3): no journal found EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # EXT4-fs (loop1): no journal found EXT4-fs (loop2): no journal found EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs (loop4): no journal found EXT4-fs (loop0): no journal found EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop3): no journal found print_req_error: I/O error, dev loop3, sector 0 Buffer I/O error on dev loop3, logical block 0, async page read print_req_error: I/O error, dev loop3, sector 6 Buffer I/O error on dev loop3, logical block 3, async page read EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # EXT4-fs (loop2): no journal found EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs (loop5): no journal found EXT4-fs (loop1): no journal found EXT4-fs (loop4): no journal found EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs (loop0): no journal found EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # Bluetooth: hci0 command 0x0c26 tx timeout EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop3): no journal found print_req_error: I/O error, dev loop3, sector 0 Buffer I/O error on dev loop3, logical block 0, async page read print_req_error: I/O error, dev loop3, sector 6 Buffer I/O error on dev loop3, logical block 3, async page read EXT4-fs (loop2): no journal found EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs (loop0): no journal found EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs (loop5): no journal found EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop1): no journal found EXT4-fs (loop4): no journal found EXT4-fs (loop3): no journal found EXT4-fs error (device loop2): ext4_get_journal_inode:4634: comm syz-executor.2: inode #16777216: comm syz-executor.2: iget: illegal inode # print_req_error: I/O error, dev loop5, sector 0 EXT4-fs (loop2): no journal found Buffer I/O error on dev loop5, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop5, sector 6 Buffer I/O error on dev loop0, logical block 0, async page read Buffer I/O error on dev loop5, logical block 3, async page read print_req_error: I/O error, dev loop0, sector 6 Buffer I/O error on dev loop1, logical block 0, async page read EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs error (device loop1): ext4_get_journal_inode:4634: comm syz-executor.1: inode #16777216: comm syz-executor.1: iget: illegal inode # EXT4-fs error (device loop0): ext4_get_journal_inode:4634: comm syz-executor.0: inode #16777216: comm syz-executor.0: iget: illegal inode # EXT4-fs (loop1): no journal found EXT4-fs error (device loop3): ext4_get_journal_inode:4634: comm syz-executor.3: inode #16777216: comm syz-executor.3: iget: illegal inode # EXT4-fs (loop0): no journal found EXT4-fs (loop5): no journal found EXT4-fs error (device loop4): ext4_get_journal_inode:4634: comm syz-executor.4: inode #16777216: comm syz-executor.4: iget: illegal inode # EXT4-fs (loop3): no journal found EXT4-fs (loop4): no journal found Bluetooth: hci0 command 0x0c26 tx timeout EXT4-fs error (device loop5): ext4_get_journal_inode:4634: comm syz-executor.5: inode #16777216: comm syz-executor.5: iget: illegal inode # EXT4-fs (loop5): no journal found kauditd_printk_skb: 16 callbacks suppressed audit: type=1804 audit(1677659465.692:84): pid=11283 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/46/bus" dev="sda1" ino=14085 res=1 audit: type=1804 audit(1677659465.782:85): pid=11300 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/46/bus" dev="sda1" ino=14085 res=1 audit: type=1804 audit(1677659465.812:86): pid=11300 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/46/bus" dev="sda1" ino=14085 res=1 audit: type=1804 audit(1677659465.812:87): pid=11300 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/46/bus" dev="sda1" ino=14085 res=1 audit: type=1804 audit(1677659465.912:88): pid=11314 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2889364964/syzkaller.WSFARG/47/bus" dev="sda1" ino=14124 res=1 audit: type=1804 audit(1677659465.952:89): pid=11316 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/47/bus" dev="sda1" ino=14129 res=1 audit: type=1804 audit(1677659466.012:90): pid=11327 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2889364964/syzkaller.WSFARG/47/bus" dev="sda1" ino=14124 res=1 audit: type=1804 audit(1677659466.012:91): pid=11327 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2889364964/syzkaller.WSFARG/47/bus" dev="sda1" ino=14124 res=1 Bluetooth: hci0 command 0x0c26 tx timeout audit: type=1804 audit(1677659466.022:92): pid=11328 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1103234814/syzkaller.FtVWl4/47/bus" dev="sda1" ino=14129 res=1 audit: type=1804 audit(1677659466.022:93): pid=11327 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir2889364964/syzkaller.WSFARG/47/bus" dev="sda1" ino=14124 res=1 program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== EXT4-fs: Warning: mounting with data=journal disables delayed allocation and O_DIRECT support! [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] System zones: 0-1, 15-15, 18-18, 34-34 EXT4-fs (loop0): orphan cleanup on readonly fs EXT4-fs warning (device loop0): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. EXT4-fs (loop0): Cannot turn on quotas: error -13 EXT4-fs error (device loop0): ext4_orphan_get:1265: comm syz-executor.0: bad orphan inode 16 EXT4-fs (loop0): Remounting filesystem read-only ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop0): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b process 'syz-executor.0' launched './file1' with NULL argv: empty string added program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] System zones: 0-1, 15-15, 18-18, 34-34 EXT4-fs (loop0): orphan cleanup on readonly fs [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] EXT4-fs warning (device loop0): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. System zones: 0-1, 15-15, 18-18, 34-34 EXT4-fs (loop1): orphan cleanup on readonly fs EXT4-fs (loop0): Cannot turn on quotas: error -13 EXT4-fs warning (device loop1): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. EXT4-fs error (device loop0): ext4_orphan_get:1265: comm syz-executor.0: bad orphan inode 16 EXT4-fs (loop1): Cannot turn on quotas: error -13 EXT4-fs error (device loop1): ext4_orphan_get:1265: comm syz-executor.1: bad orphan inode 16 EXT4-fs (loop0): Remounting filesystem read-only EXT4-fs (loop1): Remounting filesystem read-only ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop0): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop1): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] System zones: 0-1, 15-15, 18-18, 34-34 System zones: 0-1, 15-15, 18-18, 34-34 EXT4-fs (loop4): orphan cleanup on readonly fs EXT4-fs (loop5): orphan cleanup on readonly fs EXT4-fs warning (device loop4): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. EXT4-fs warning (device loop5): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. EXT4-fs (loop4): Cannot turn on quotas: error -13 EXT4-fs error (device loop4): ext4_orphan_get:1265: comm syz-executor.4: bad orphan inode 16 [EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=b002c028, mo2=0002] System zones: 0-1, 15-15, 18-18, 34-34 Bluetooth: hci0 command 0x0c26 tx timeout EXT4-fs (loop3): orphan cleanup on readonly fs EXT4-fs (loop5): Cannot turn on quotas: error -13 EXT4-fs (loop4): Remounting filesystem read-only EXT4-fs error (device loop5): ext4_orphan_get:1265: comm syz-executor.5: bad orphan inode 16 EXT4-fs warning (device loop3): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-13). Please run e2fsck to fix. ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop5): Remounting filesystem read-only EXT4-fs (loop4): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop3): Cannot turn on quotas: error -13 EXT4-fs (loop5): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b EXT4-fs error (device loop3): ext4_orphan_get:1265: comm syz-executor.3: bad orphan inode 16 EXT4-fs (loop3): Remounting filesystem read-only ext4_test_bit(bit=15, block=18) = 0 EXT4-fs (loop3): mounted filesystem without journal. Opts: usrjquota=,errors=remount-ro,data_err=abort,min_batch_time=0x00000000000000b