======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc8-next-20230216 #1 Not tainted
------------------------------------------------------
syz-executor.1/15512 is trying to acquire lock:
ffff88800b568400 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: ext4_bmap+0x52/0x470
but task is already holding lock:
ffff88801008c3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x483/0xc90
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
mutex_lock_io_nested+0x149/0x1300
__jbd2_log_wait_for_space+0x238/0x4b0
add_transaction_credits+0xa42/0xb80
start_this_handle+0x3a6/0x14d0
jbd2__journal_start+0x394/0x6b0
__ext4_journal_start_sb+0x4c2/0x6f0
ext4_dirty_inode+0xa5/0x130
__mark_inode_dirty+0x1aa/0xee0
generic_write_end+0x319/0x3d0
ext4_da_write_end+0x162/0x950
generic_perform_write+0x318/0x580
ext4_buffered_write_iter+0x164/0x460
ext4_file_write_iter+0x3ff/0x1930
vfs_write+0x9b4/0xdc0
__x64_sys_pwrite64+0x1ff/0x260
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
-> #0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
__lock_acquire+0x2da7/0x63b0
lock_acquire.part.0+0xec/0x320
down_read+0x3d/0x50
ext4_bmap+0x52/0x470
bmap+0xb0/0x130
jbd2_journal_bmap+0xac/0x1d0
jbd2_journal_flush+0x87f/0xc90
__ext4_ioctl+0x9fd/0x4330
__x64_sys_ioctl+0x19e/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&journal->j_checkpoint_mutex);
lock(&sb->s_type->i_mutex_key#6);
lock(&journal->j_checkpoint_mutex);
rlock(&sb->s_type->i_mutex_key#6);
*** DEADLOCK ***
2 locks held by syz-executor.1/15512:
#0: ffff88801008c170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310
#1: ffff88801008c3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x483/0xc90
stack backtrace:
CPU: 1 PID: 15512 Comm: syz-executor.1 Not tainted 6.2.0-rc8-next-20230216 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x91/0xf0
check_noncircular+0x263/0x2e0
__lock_acquire+0x2da7/0x63b0
lock_acquire.part.0+0xec/0x320
down_read+0x3d/0x50
ext4_bmap+0x52/0x470
bmap+0xb0/0x130
jbd2_journal_bmap+0xac/0x1d0
jbd2_journal_flush+0x87f/0xc90
__ext4_ioctl+0x9fd/0x4330
__x64_sys_ioctl+0x19e/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff299beab19
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:00007ff297160188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff299cfdf60 RCX: 00007ff299beab19
RDX: 0000000020000340 RSI: 000000004004662b RDI: 0000000000000004
RBP: 00007ff299c44f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcc748072f R14: 00007ff297160300 R15: 0000000000022000
</TASK>
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
audit: type=1400 audit(6913488718.661:27): avc: denied { relabelto } for pid=15831 comm="syz-executor.7" name="file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.670:28): avc: denied { setattr } for pid=15831 comm="syz-executor.7" name="file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.675:29): avc: denied { read write } for pid=15831 comm="syz-executor.7" name="file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.682:30): avc: denied { open } for pid=15831 comm="syz-executor.7" path="/syzkaller-testdir856204546/syzkaller.2SbLLt/581/file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.771:31): avc: denied { relabelfrom } for pid=15831 comm="syz-executor.7" name="file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.916:32): avc: denied { getattr } for pid=274 comm="syz-executor.7" path="/syzkaller-testdir856204546/syzkaller.2SbLLt/581/file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(6913488718.917:33): avc: denied { unlink } for pid=274 comm="syz-executor.7" name="file1" dev="sda" ino=16143 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1
tmpfs: Bad value for 'nr_blocks'
tmpfs: Bad value for 'nr_blocks'
tmpfs: Bad value for 'nr_blocks'
tmpfs: Bad value for 'nr_blocks'
tmpfs: Bad value for 'nr_blocks'
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
blk_print_req_error: 8 callbacks suppressed
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
buffer_io_error: 6 callbacks suppressed
Buffer I/O error on dev sr0, logical block 0, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 1, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 2, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 3, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 4, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 5, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 6, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 7, async page read
cgroup: fork rejected by pids controller in /syz2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 0, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 1, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer