Quota error (device loop2): v2_read_file_info: Number of blocks too big for quota file size (52959232 > 6144).
EXT4-fs warning (device loop2): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
======================================================
WARNING: possible circular locking dependency detected
4.14.228-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/18454 is trying to acquire lock:
(&sig->cred_guard_mutex){+.+.}, at: [<ffffffff81a06bc4>] do_io_accounting fs/proc/base.c:2725 [inline]
(&sig->cred_guard_mutex){+.+.}, at: [<ffffffff81a06bc4>] proc_tid_io_accounting+0x184/0x290 fs/proc/base.c:2768
EXT4-fs (loop2): mount failed
but task is already holding lock:
(&p->lock){+.+.}, at: [<ffffffff818e708a>] seq_read+0xba/0x1120 fs/seq_file.c:165
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&p->lock){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
seq_read+0xba/0x1120 fs/seq_file.c:165
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
-> #2 (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_setattr+0x52/0x500 fs/overlayfs/inode.c:38
notify_change+0x56b/0xd10 fs/attr.c:313
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+0x46/0xbb
-> #1 (&ovl_i_mutex_dir_key[depth]#2){++++}:
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
-> #0 (&sig->cred_guard_mutex){+.+.}:
lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
do_io_accounting fs/proc/base.c:2725 [inline]
proc_tid_io_accounting+0x184/0x290 fs/proc/base.c:2768
proc_single_show+0xe7/0x150 fs/proc/base.c:761
traverse+0x306/0x850 fs/seq_file.c:111
seq_read+0x94b/0x1120 fs/seq_file.c:192
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
other info that might help us debug this:
Chain exists of:
&sig->cred_guard_mutex --> sb_writers#3 --> &p->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&p->lock);
lock(sb_writers#3);
lock(&p->lock);
lock(&sig->cred_guard_mutex);
*** DEADLOCK ***
1 lock held by syz-executor.0/18454:
#0: (&p->lock){+.+.}, at: [<ffffffff818e708a>] seq_read+0xba/0x1120 fs/seq_file.c:165
stack backtrace:
CPU: 1 PID: 18454 Comm: syz-executor.0 Not tainted 4.14.228-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
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
do_io_accounting fs/proc/base.c:2725 [inline]
proc_tid_io_accounting+0x184/0x290 fs/proc/base.c:2768
proc_single_show+0xe7/0x150 fs/proc/base.c:761
traverse+0x306/0x850 fs/seq_file.c:111
seq_read+0x94b/0x1120 fs/seq_file.c:192
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
RIP: 0033:0x466459
RSP: 002b:00007fccdf9a9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000009 RSI: 0000000020004980 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 000000000000007f R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffc760c835f R14: 00007fccdf9a9300 R15: 0000000000022000
Quota error (device loop2): v2_read_file_info: Number of blocks too big for quota file size (52959232 > 6144).
EXT4-fs warning (device loop2): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
FAT-fs (loop2): Unrecognized mount option ">bi$dK?:wI|m! . IO<}IES(Jh<L?\ㆡ2=ÝT 655^&{=b-%K$" or missing value
caif:caif_disconnect_client(): nothing to disconnect
caif:caif_disconnect_client(): nothing to disconnect
IPVS: ftp: loaded support on port[0] = 21
FAT-fs (loop0): IO charset cp932H$ not found
FAT-fs (loop0): IO charset cp932H$ not found
IPVS: ftp: loaded support on port[0] = 21
xt_helper: cannot load conntrack support for proto=10
xt_helper: cannot load conntrack support for proto=10
overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection.
overlayfs: filesystem on './bus' not supported as upperdir
ufs: ufs was compiled with read-only support, can't be mounted as read-write
overlayfs: filesystem on './bus' not supported as upperdir
loop2: [POWERTEC] p1 p2
loop2: p1 start 134152192 is beyond EOD, truncated
loop2: p2 size 2005401600 extends beyond EOD, truncated
NILFS (loop0): unable to read secondary superblock (blocksize = 1024)
NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop0): unrecognized mount option "y6dx9+<9[F 'wХu)CVFi<_X]ehsdY/CRO7@%9 D<-r3LBAU3{'aްTۧ-Sfe4"
NILFS (loop0): unable to read secondary superblock (blocksize = 1024)
NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop0): unrecognized mount option "y6dx9+<9[F 'wХu)CVFi<_X]ehsdY/CRO7@%9 D<-r3LBAU3{'aްTۧ-Sfe4"
libceph: resolve 'd ' (ret=-3): failed
libceph: parse_ips bad ip '[d :7]'
FAT-fs (loop2): IO charset cp932H$ not found
FAT-fs (loop2): IO charset cp932 not found