loop3: detected capacity change from 0 to 40
======================================================
WARNING: possible circular locking dependency detected
6.1.0-next-20221219 #1 Not tainted
------------------------------------------------------
syz-executor.0/9990 is trying to acquire lock:
ffff88800fe04170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310
but task is already holding lock:
ffff88800fe02b90 (&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+0xa6c/0x1af0
__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+0x9be/0x4560
__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+0x9be/0x4560
__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+0xa6c/0x1af0
__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.0/9990:
#0: ffff88800fe00438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xa2f/0x1af0
#1: ffff88801c3535b0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90
#2: ffff88801c353750 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x126/0x550
#3: ffff88800fe02b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550
stack backtrace:
CPU: 1 PID: 9990 Comm: syz-executor.0 Not tainted 6.1.0-next-20221219 #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
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+0xa6c/0x1af0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f9d8e39fb19
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:00007f9d8b915188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9d8e4b2f60 RCX: 00007f9d8e39fb19
RDX: 0000000020001780 RSI: 0000000040086602 RDI: 0000000000000003
RBP: 00007f9d8e3f9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffca170e0ff R14: 00007f9d8b915300 R15: 0000000000022000
loop2: detected capacity change from 0 to 40
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
loop2: detected capacity change from 0 to 40
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 10028 Comm: syz-executor.2 Not tainted 6.1.0-next-20221219 #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
fat_cache_add.part.0+0x5b4/0xb50
fat_get_cluster+0x922/0xd40
fat_chain_add+0x3c5/0x610
fat_add_cluster+0xcf/0x100
fat_fallocate+0x275/0x320
vfs_fallocate+0x48d/0xe00
ioctl_preallocate+0x192/0x210
do_vfs_ioctl+0x1751/0x1af0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f5cc3996b19
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:00007f5cc0f0c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5cc3aa9f60 RCX: 00007f5cc3996b19
RDX: 0000000020000100 RSI: 0000000040305828 RDI: 0000000000000003
RBP: 00007f5cc0f0c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffef2643ff R14: 00007f5cc0f0c300 R15: 0000000000022000