netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. tmpfs: Bad value for 'mpol' ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc8-next-20230216 #1 Not tainted ------------------------------------------------------ syz-executor.2/9061 is trying to acquire lock: ffff88800b578400 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: ext4_bmap+0x52/0x470 but task is already holding lock: ffff88800fece3f8 (&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: -> #3 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: mutex_lock_io_nested+0x149/0x1300 jbd2_journal_flush+0x19e/0xc90 ext4_change_inode_journal_flag+0x39d/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 -> #2 (&journal->j_barrier){+.+.}-{3:3}: __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 -> #1 (&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 -> #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: Chain exists of: &sb->s_type->i_mutex_key#6 --> &journal->j_barrier --> &journal->j_checkpoint_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_checkpoint_mutex); lock(&journal->j_barrier); lock(&journal->j_checkpoint_mutex); rlock(&sb->s_type->i_mutex_key#6); *** DEADLOCK *** 2 locks held by syz-executor.2/9061: #0: ffff88800fece170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310 #1: ffff88800fece3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x483/0xc90 stack backtrace: CPU: 1 PID: 9061 Comm: syz-executor.2 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: 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: 0033:0x7ff621314b19 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:00007ff61e88a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff621427f60 RCX: 00007ff621314b19 RDX: 0000000020000340 RSI: 000000004004662b RDI: 0000000000000006 RBP: 00007ff62136ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef2d71d4f R14: 00007ff61e88a300 R15: 0000000000022000 netlink: 'syz-executor.0': attribute type 3 has an invalid length. netlink: 'syz-executor.0': attribute type 3 has an invalid length. tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. tmpfs: Bad value for 'mpol' netlink: 'syz-executor.0': attribute type 3 has an invalid length. tmpfs: Bad value for 'mpol' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' netlink: 'syz-executor.0': attribute type 3 has an invalid length. netlink: 'syz-executor.4': attribute type 3 has an invalid length. netlink: 'syz-executor.0': attribute type 3 has an invalid length. netlink: 'syz-executor.4': attribute type 3 has an invalid length. netlink: 'syz-executor.6': attribute type 3 has an invalid length. netlink: 'syz-executor.6': attribute type 3 has an invalid length. netlink: 'syz-executor.4': attribute type 3 has an invalid length. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device lo entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device lo entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode /dev/sr0: Can't open blockdev