ext4 filesystem being mounted at /syzkaller-testdir773853261/syzkaller.cMtffg/86/file0 supports timestamps until 2038 (0x7fffffff)
9pnet_virtio: no channels available for device syz
======================================================
WARNING: possible circular locking dependency detected
5.10.52 #1 Not tainted
------------------------------------------------------
syz-executor.4/11731 is trying to acquire lock:
ffff8880207a4b28 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x4d/0x380 fs/quota/dquot.c:476
but task is already holding lock:
ffff888047d08278 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x74f/0x12b0 fs/ext4/inode.c:4258
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ei->i_data_sem/2){++++}-{3:3}:
down_read+0x9b/0x420 kernel/locking/rwsem.c:1504
ext4_map_blocks+0x380/0x18d0 fs/ext4/inode.c:560
ext4_getblk+0x144/0x680 fs/ext4/inode.c:847
ext4_bread+0x29/0x210 fs/ext4/inode.c:899
ext4_quota_write+0x233/0x630 fs/ext4/super.c:6544
write_blk+0x10c/0x200 fs/quota/quota_tree.c:73
get_free_dqblk+0xff/0x2d0 fs/quota/quota_tree.c:102
do_insert_tree+0x79c/0x1150 fs/quota/quota_tree.c:309
do_insert_tree+0xf5c/0x1150 fs/quota/quota_tree.c:340
dq_insert_tree fs/quota/quota_tree.c:366 [inline]
qtree_write_dquot+0x3bf/0x580 fs/quota/quota_tree.c:385
v2_write_dquot+0x11c/0x250 fs/quota/quota_v2.c:358
dquot_acquire+0x2cf/0x570 fs/quota/dquot.c:443
ext4_acquire_dquot+0x245/0x350 fs/ext4/super.c:6200
dqget+0x61e/0xf00 fs/quota/dquot.c:901
__dquot_initialize+0x3c3/0xb80 fs/quota/dquot.c:1479
ext4_setattr+0x3ae/0x2220 fs/ext4/inode.c:5349
notify_change+0xb9e/0x1080 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:64
handle_truncate fs/namei.c:2905 [inline]
do_open fs/namei.c:3247 [inline]
path_openat+0x1d4d/0x26c0 fs/namei.c:3360
do_filp_open+0x17e/0x3c0 fs/namei.c:3387
do_sys_openat2+0x16d/0x420 fs/open.c:1180
do_sys_open fs/open.c:1196 [inline]
__do_sys_openat fs/open.c:1212 [inline]
__se_sys_openat fs/open.c:1207 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1207
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
-> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}:
down_read+0x9b/0x420 kernel/locking/rwsem.c:1504
v2_read_dquot+0x49/0x120 fs/quota/quota_v2.c:332
dquot_acquire+0x133/0x570 fs/quota/dquot.c:434
ext4_acquire_dquot+0x245/0x350 fs/ext4/super.c:6200
dqget+0x61e/0xf00 fs/quota/dquot.c:901
__dquot_initialize+0x3c3/0xb80 fs/quota/dquot.c:1479
ext4_setattr+0x3ae/0x2220 fs/ext4/inode.c:5349
notify_change+0xb9e/0x1080 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:64
handle_truncate fs/namei.c:2905 [inline]
do_open fs/namei.c:3247 [inline]
path_openat+0x1d4d/0x26c0 fs/namei.c:3360
do_filp_open+0x17e/0x3c0 fs/namei.c:3387
do_sys_openat2+0x16d/0x420 fs/open.c:1180
do_sys_open fs/open.c:1196 [inline]
__do_sys_openat fs/open.c:1212 [inline]
__se_sys_openat fs/open.c:1207 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1207
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:2985 [inline]
check_prevs_add kernel/locking/lockdep.c:3110 [inline]
validate_chain kernel/locking/lockdep.c:3725 [inline]
__lock_acquire+0x29f6/0x5b20 kernel/locking/lockdep.c:4950
lock_acquire kernel/locking/lockdep.c:5560 [inline]
lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
__mutex_lock_common kernel/locking/mutex.c:969 [inline]
__mutex_lock+0x13f/0x1230 kernel/locking/mutex.c:1114
dquot_commit+0x4d/0x380 fs/quota/dquot.c:476
ext4_write_dquot+0x243/0x2f0 fs/ext4/super.c:6184
ext4_mark_dquot_dirty+0x111/0x1a0 fs/ext4/super.c:6235
mark_dquot_dirty fs/quota/dquot.c:347 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:385 [inline]
__dquot_free_space+0x739/0xa60 fs/quota/dquot.c:1894
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_free_blocks+0x1a76/0x20e0 fs/ext4/mballoc.c:5503
ext4_remove_blocks fs/ext4/extents.c:2501 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2667 [inline]
ext4_ext_remove_space+0x2077/0x40d0 fs/ext4/extents.c:2915
ext4_ext_truncate+0x1e6/0x240 fs/ext4/extents.c:4376
ext4_truncate+0xd5a/0x12b0 fs/ext4/inode.c:4263
ext4_setattr+0x1487/0x2220 fs/ext4/inode.c:5504
notify_change+0xb9e/0x1080 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:64
handle_truncate fs/namei.c:2905 [inline]
do_open fs/namei.c:3247 [inline]
path_openat+0x1d4d/0x26c0 fs/namei.c:3360
do_filp_open+0x17e/0x3c0 fs/namei.c:3387
do_sys_openat2+0x16d/0x420 fs/open.c:1180
do_sys_open fs/open.c:1196 [inline]
__do_sys_openat fs/open.c:1212 [inline]
__se_sys_openat fs/open.c:1207 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1207
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
other info that might help us debug this:
Chain exists of:
&dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/2);
lock(&s->s_dquot.dqio_sem);
lock(&ei->i_data_sem/2);
lock(&dquot->dq_lock);
*** DEADLOCK ***
5 locks held by syz-executor.4/11731:
#0: ffff88804d8ca438 (sb_writers#3){.+.+}-{0:0}, at: do_open fs/namei.c:3236 [inline]
#0: ffff88804d8ca438 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1a3d/0x26c0 fs/namei.c:3360
#1: ffff888047d08488 (&sb->s_type->i_mutex_key#13){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline]
#1: ffff888047d08488 (&sb->s_type->i_mutex_key#13){++++}-{3:3}, at: do_truncate+0x125/0x1f0 fs/open.c:62
#2: ffff888047d08310 (&ei->i_mmap_sem){++++}-{3:3}, at: ext4_setattr+0xd3d/0x2220 fs/ext4/inode.c:5429
#3: ffff888047d08278 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x74f/0x12b0 fs/ext4/inode.c:4258
#4: ffffffff84ed1e60 (dquot_srcu){....}-{0:0}, at: i_dquot fs/quota/dquot.c:926 [inline]
#4: ffffffff84ed1e60 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x190/0xa60 fs/quota/dquot.c:1867
stack backtrace:
CPU: 0 PID: 11731 Comm: syz-executor.4 Not tainted 5.10.52 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:118
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2120
check_prev_add kernel/locking/lockdep.c:2985 [inline]
check_prevs_add kernel/locking/lockdep.c:3110 [inline]
validate_chain kernel/locking/lockdep.c:3725 [inline]
__lock_acquire+0x29f6/0x5b20 kernel/locking/lockdep.c:4950
lock_acquire kernel/locking/lockdep.c:5560 [inline]
lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
__mutex_lock_common kernel/locking/mutex.c:969 [inline]
__mutex_lock+0x13f/0x1230 kernel/locking/mutex.c:1114
dquot_commit+0x4d/0x380 fs/quota/dquot.c:476
ext4_write_dquot+0x243/0x2f0 fs/ext4/super.c:6184
ext4_mark_dquot_dirty+0x111/0x1a0 fs/ext4/super.c:6235
mark_dquot_dirty fs/quota/dquot.c:347 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:385 [inline]
__dquot_free_space+0x739/0xa60 fs/quota/dquot.c:1894
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_free_blocks+0x1a76/0x20e0 fs/ext4/mballoc.c:5503
ext4_remove_blocks fs/ext4/extents.c:2501 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2667 [inline]
ext4_ext_remove_space+0x2077/0x40d0 fs/ext4/extents.c:2915
ext4_ext_truncate+0x1e6/0x240 fs/ext4/extents.c:4376
ext4_truncate+0xd5a/0x12b0 fs/ext4/inode.c:4263
ext4_setattr+0x1487/0x2220 fs/ext4/inode.c:5504
notify_change+0xb9e/0x1080 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:64
handle_truncate fs/namei.c:2905 [inline]
do_open fs/namei.c:3247 [inline]
path_openat+0x1d4d/0x26c0 fs/namei.c:3360
do_filp_open+0x17e/0x3c0 fs/namei.c:3387
do_sys_openat2+0x16d/0x420 fs/open.c:1180
do_sys_open fs/open.c:1196 [inline]
__do_sys_openat fs/open.c:1212 [inline]
__se_sys_openat fs/open.c:1207 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1207
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f70db89a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000000084e00 RSI: 0000000020004c40 RDI: ffffffffffffff9c
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc13a2986f R14: 00007f70db89a300 R15: 0000000000022000
EXT4-fs error (device loop5): ext4_fill_super:4954: inode #2: comm syz-executor.5: iget: root inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
EXT4-fs error (device loop7): ext4_ext_check_inode:459: inode #4: comm syz-executor.7: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0)
EXT4-fs error (device loop7): ext4_quota_enable:6380: comm syz-executor.7: Bad quota inode # 4
EXT4-fs warning (device loop7): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop7): mount failed
netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'.
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
ext4 filesystem being mounted at /syzkaller-testdir773853261/syzkaller.cMtffg/87/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs error (device loop5): ext4_fill_super:4954: inode #2: comm syz-executor.5: iget: root inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
EXT4-fs error (device loop2): ext4_ext_check_inode:459: inode #4: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0)
EXT4-fs (loop7): mounted filesystem without journal. Opts: ,errors=continue
ext4 filesystem being mounted at /syzkaller-testdir204263206/syzkaller.FzpL7q/170/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs error (device loop2): ext4_quota_enable:6380: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
device veth0_vlan entered promiscuous mode
netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'.
EXT4-fs error (device loop4): ext4_ext_check_inode:459: inode #4: comm syz-executor.4: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0)
EXT4-fs error (device loop4): ext4_quota_enable:6380: comm syz-executor.4: Bad quota inode # 4
EXT4-fs warning (device loop4): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop4): mount failed