======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc1-next-20221226 #1 Not tainted
------------------------------------------------------
syz-executor.4/13687 is trying to acquire lock:
ffff888009be8170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310
but task is already holding lock:
ffff88800cd8eb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}:
percpu_down_write+0x51/0x350
ext4_ind_migrate+0x23b/0x840
ext4_fileattr_set+0x1521/0x19f0
vfs_fileattr_set+0x780/0xb90
do_vfs_ioctl+0xfa6/0x15d0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #2 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
down_read+0x9c/0x450
ext4_bmap+0x52/0x470
bmap+0xb0/0x130
jbd2_journal_bmap+0xac/0x190
jbd2_journal_flush+0x857/0xc10
__ext4_ioctl+0x9db/0x43b0
__x64_sys_ioctl+0x19e/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
mutex_lock_io_nested+0x14c/0x1330
jbd2_journal_flush+0x19e/0xc10
ext4_ioctl_group_add+0x2b3/0x580
__ext4_ioctl+0x6a2/0x43b0
__x64_sys_ioctl+0x19e/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #0 (&journal->j_barrier){+.+.}-{3:3}:
__lock_acquire+0x2a02/0x5e70
lock_acquire.part.0+0x11e/0x340
__mutex_lock+0x136/0x14e0
jbd2_journal_lock_updates+0x162/0x310
ext4_change_inode_journal_flag+0x187/0x550
ext4_fileattr_set+0x14fa/0x19f0
vfs_fileattr_set+0x780/0xb90
do_vfs_ioctl+0xfa6/0x15d0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/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.4/13687:
#0: ffff88800cd8c438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf6b/0x15d0
#1: ffff88801bff35b0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90
#2: ffff88801bff3750 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x126/0x550
#3: ffff88800cd8eb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550
stack backtrace:
CPU: 0 PID: 13687 Comm: syz-executor.4 Not tainted 6.2.0-rc1-next-20221226 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x8f/0xb7
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire.part.0+0x11e/0x340
__mutex_lock+0x136/0x14e0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
jbd2_journal_lock_updates+0x162/0x310
ext4_change_inode_journal_flag+0x187/0x550
ext4_fileattr_set+0x14fa/0x19f0
vfs_fileattr_set+0x780/0xb90
do_vfs_ioctl+0xfa6/0x15d0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f6683e4ab19
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:00007f66813c0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6683f5df60 RCX: 00007f6683e4ab19
RDX: 0000000020000080 RSI: 0000000040086602 RDI: 000000000000000d
RBP: 00007f6683ea4f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5433603f R14: 00007f66813c0300 R15: 0000000000022000
CPU: 1 PID: 13709 Comm: syz-executor.0 Not tainted 6.2.0-rc1-next-20221226 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x8f/0xb7
should_fail_ex.cold+0x5/0xa
should_failslab+0x9/0x20
kmem_cache_alloc+0x5a/0x410
security_inode_alloc+0x38/0x160
inode_init_always+0xbb2/0xea0
alloc_inode+0x84/0x240
new_inode+0x25/0x1f0
shmem_get_inode+0x191/0xdb0
__shmem_file_setup+0xb8/0x320
__do_sys_memfd_create+0x319/0x910
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f0c9aff5b19
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:00007f0c9856af48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0c9aff5b19
RDX: 0000000000008200 RSI: 0000000000000000 RDI: 00007f0c9b04f0fb
RBP: 0000000000000003 R08: 0000000000004100 R09: ffffffffffffffff
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 0000000000040000 R15: 0000000020013800