audit: type=1326 audit(1672506191.808:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=11221 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f36b1501b19 code=0x0
======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc1-next-20221226 #1 Not tainted
------------------------------------------------------
syz-executor.2/11230 is trying to acquire lock:
ffff88800ff7a170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310
but task is already holding lock:
ffff88800ff78b90 (&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+0x9db/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.2/11230:
#0: ffff88800ff6e438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf6b/0x15d0
#1: ffff88801bb197e0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90
#2: ffff88801bb19980 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x126/0x550
#3: ffff88800ff78b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550
stack backtrace:
CPU: 1 PID: 11230 Comm: syz-executor.2 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:
<TASK>
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+0xfa6/0x15d0
__x64_sys_ioctl+0x110/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff3799dab19
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:00007ff376f50188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff379aedf60 RCX: 00007ff3799dab19
RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000003
RBP: 00007ff379a34f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc24ec724f R14: 00007ff376f50300 R15: 0000000000022000
</TASK>
audit: type=1400 audit(1672506191.950:22): avc: denied { relabelto } for pid=11221 comm="syz-executor.3" name="RAW" dev="sockfs" ino=27852 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:syslogd_initrc_exec_t:s0 tclass=rawip_socket permissive=1
audit: type=1326 audit(1672506192.627:23): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=11221 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f36b1501b19 code=0x0