overlayfs: unrecognized mount option "u|DxYpperdir=./bus" or missing value EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix. EXT4-fs (loop1): mount failed ====================================================== WARNING: possible circular locking dependency detected 4.14.256-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/2974 is trying to acquire lock: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] (&ovl_i_mutex_dir_key[depth]){++++}, at: [] do_last fs/namei.c:3333 [inline] (&ovl_i_mutex_dir_key[depth]){++++}, at: [] path_openat+0x149b/0x2970 fs/namei.c:3569 but task is already holding lock: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 lock_trace fs/proc/base.c:407 [inline] proc_pid_syscall+0xa7/0x2a0 fs/proc/base.c:639 proc_single_show+0xe7/0x150 fs/proc/base.c:761 seq_read+0x4e4/0x1180 fs/seq_file.c:240 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 do_preadv fs/read_write.c:1065 [inline] SYSC_preadv fs/read_write.c:1115 [inline] SyS_preadv+0x15a/0x200 fs/read_write.c:1110 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 seq_read+0xba/0x1180 fs/seq_file.c:168 proc_reg_read+0xee/0x1a0 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x418/0x910 fs/splice.c:416 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #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:1549 [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:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 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+0x46/0xbb -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 1 lock held by syz-executor.0/2974: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] #0: (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 stack backtrace: CPU: 0 PID: 2974 Comm: syz-executor.0 Not tainted 4.14.256-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f90aefacae9 RSP: 002b:00007f90adf22188 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007f90af0bff60 RCX: 00007f90aefacae9 RDX: 0000000020000740 RSI: 0000000020000580 RDI: 0000000020000240 RBP: 00007f90af006ff7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.4' sets config #1 R13: 00007ffe29bc5baf R14: 00007f90adf22300 R15: 0000000000022000 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix. EXT4-fs (loop1): mount failed usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.4' sets config #1 EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed Bluetooth: hci2 command 0x0401 tx timeout EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: unrecognized mount option "lowerd" or missing value overlayfs: unrecognized mount option "lowerd" or missing value EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs (loop1): mount failed overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: failed to resolve '.6MW>pGF= H0΍TXy': -2 EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 overlayfs: unrecognized mount option "uppdrdir[file1" or missing value EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-116). Please run e2fsck to fix. EXT4-fs (loop1): mount failed xt_HL: invalid or unknown mode 3 xt_HL: invalid or unknown mode 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix. overlayfs: unrecognized mount option "work" or missing value EXT4-fs (loop1): mount failed overlayfs: unrecognized mount option "work" or missing value EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix. EXT4-fs (loop1): mount failed vhci_hcd: Failed attach request for unsupported USB speed: UNKNOWN EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix. overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs (loop1): mount failed overlayfs: failed to resolve 'file1': -2 EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: unrecognized mount option "uppeܧ>xlow" or missing value EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) vhci_hcd: Failed attach request for unsupported USB speed: UNKNOWN EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed overlayfs: filesystem on './bus' not supported as upperdir bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state device bridge0 entered promiscuous mode EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. Bluetooth: hci2 command 0x0401 tx timeout overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs (loop1): mount failed overlayfs: unrecognized mount option "up" or missing value EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) overlayfs: unrecognized mount option "up" or missing value EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 overlayfs: unrecognized mount option "upp" or missing value EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. overlayfs: unrecognized mount option "upp" or missing value EXT4-fs (loop1): mount failed overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): ext4_ext_check_inode:510: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop1): ext4_quota_enable:5726: comm syz-executor.1: Bad quota inode # 3 EXT4-fs warning (device loop1): ext4_enable_quotas:5766: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. EXT4-fs (loop1): mount failed Bluetooth: hci2 command 0x0401 tx timeout overlayfs: unrecognized mount option "֏t{