Process accounting resumed ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc7-next-20230210 #1 Not tainted ------------------------------------------------------ syz-executor.3/12091 is trying to acquire lock: ffff88800fee2170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310 but task is already holding lock: ffff88800fee0b90 (&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+0x7a2/0xbd0 do_vfs_ioctl+0xfc1/0x1690 __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+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 -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: mutex_lock_io_nested+0x149/0x1300 jbd2_journal_flush+0x19e/0xc90 __ext4_ioctl+0x9fd/0x4330 __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+0x2da7/0x63b0 lock_acquire.part.0+0xec/0x320 __mutex_lock+0x133/0x14a0 jbd2_journal_lock_updates+0x162/0x310 ext4_change_inode_journal_flag+0x187/0x550 ext4_fileattr_set+0x14fa/0x19f0 vfs_fileattr_set+0x7a2/0xbd0 do_vfs_ioctl+0xfc1/0x1690 __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.3/12091: #0: ffff88800fed6438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf86/0x1690 #1: ffff888040840df0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xbd0 #2: ffff888040840f90 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x126/0x550 #3: ffff88800fee0b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550 stack backtrace: CPU: 1 PID: 12091 Comm: syz-executor.3 Not tainted 6.2.0-rc7-next-20230210 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x91/0xf0 check_noncircular+0x263/0x2e0 __lock_acquire+0x2da7/0x63b0 lock_acquire.part.0+0xec/0x320 __mutex_lock+0x133/0x14a0 jbd2_journal_lock_updates+0x162/0x310 ext4_change_inode_journal_flag+0x187/0x550 ext4_fileattr_set+0x14fa/0x19f0 vfs_fileattr_set+0x7a2/0xbd0 do_vfs_ioctl+0xfc1/0x1690 __x64_sys_ioctl+0x110/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f899a33cb19 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:00007f89978b2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f899a44ff60 RCX: 00007f899a33cb19 RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000003 RBP: 00007f899a396f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb78af94f R14: 00007f89978b2300 R15: 0000000000022000 Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Option ' ' to dns_resolver key: bad/missing value Process accounting resumed Process accounting resumed Option ' ' to dns_resolver key: bad/missing value Option ' ' to dns_resolver key: bad/missing value Option ' ' to dns_resolver key: bad/missing value syz-executor.4 (12454) used greatest stack depth: 22632 bytes left syz-executor.3 (12493) used greatest stack depth: 22440 bytes left