RBP: 00007fa96f4fb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe2e2d561f R14: 00007fa96f4fb300 R15: 0000000000022000
</TASK>
======================================================
WARNING: possible circular locking dependency detected
6.1.0-rc3-next-20221104 #1 Not tainted
------------------------------------------------------
syz-executor.7/17594 is trying to acquire lock:
ffff88800fd44170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x15e/0x310
but task is already holding lock:
ffff88800fd42b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}:
ext4_writepages+0x1d2/0x3690
do_writepages+0x1b0/0x6a0
filemap_fdatawrite_wbc+0x147/0x1b0
__filemap_fdatawrite_range+0xb6/0x100
filemap_write_and_wait_range+0x89/0x110
__iomap_dio_rw+0x5ed/0x1bd0
iomap_dio_rw+0x3c/0xa0
ext4_file_write_iter+0xb59/0x1900
do_iter_readv_writev+0x211/0x3c0
do_iter_write+0x18b/0x700
vfs_iter_write+0x70/0xa0
iter_file_splice_write+0x73a/0xca0
direct_splice_actor+0x10f/0x170
splice_direct_to_actor+0x336/0x8c0
do_splice_direct+0x1b8/0x290
do_sendfile+0xb1d/0x1280
__x64_sys_sendfile64+0x1d1/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #2 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
down_read+0x98/0x450
ext4_bmap+0x4e/0x470
bmap+0xac/0x120
jbd2_journal_bmap+0xa8/0x180
jbd2_journal_flush+0x853/0xc00
__ext4_ioctl+0x9c1/0x4140
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
mutex_lock_io_nested+0x148/0x1310
jbd2_journal_flush+0x19a/0xc00
__ext4_ioctl+0x9c1/0x4140
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #0 (&journal->j_barrier){+.+.}-{3:3}:
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
__mutex_lock+0x136/0x14d0
jbd2_journal_lock_updates+0x15e/0x310
ext4_change_inode_journal_flag+0x17f/0x530
ext4_fileattr_set+0x1427/0x18c0
vfs_fileattr_set+0x77c/0xb80
do_vfs_ioctl+0xfa6/0x15d0
__x64_sys_ioctl+0x10c/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
other info that might help us debug this:
Chain exists of:
&journal->j_barrier --> &sb->s_type->i_mutex_key#6 --> &sbi->s_writepages_rwsem
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->s_writepages_rwsem);
lock(&sb->s_type->i_mutex_key#6);
lock(&sbi->s_writepages_rwsem);
lock(&journal->j_barrier);
*** DEADLOCK ***
4 locks held by syz-executor.7/17594:
#0: ffff88800fd40438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf6b/0x15d0
#1: ffff888019598df0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb80
#2: ffff888019598f90 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x11e/0x530
#3: ffff88800fd42b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530
stack backtrace:
CPU: 0 PID: 17594 Comm: syz-executor.7 Not tainted 6.1.0-rc3-next-20221104 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x8b/0xb3
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
__mutex_lock+0x136/0x14d0
jbd2_journal_lock_updates+0x15e/0x310
ext4_change_inode_journal_flag+0x17f/0x530
ext4_fileattr_set+0x1427/0x18c0
vfs_fileattr_set+0x77c/0xb80
do_vfs_ioctl+0xfa6/0x15d0
__x64_sys_ioctl+0x10c/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff707f8ab19
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:00007ff705500188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff70809df60 RCX: 00007ff707f8ab19
RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000003
RBP: 00007ff707fe4f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd64634c1f R14: 00007ff705500300 R15: 0000000000022000
</TASK>