====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc3-next-20221107 #1 Not tainted ------------------------------------------------------ syz-executor.5/12879 is trying to acquire lock: ffff88800fbde170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310 but task is already holding lock: ffff88800fbdcb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17b/0x540 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/0x830 ext4_fileattr_set+0x1452/0x18c0 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+0x9c1/0x4140 __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+0x9c1/0x4140 __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+0x1a6/0x530 __mutex_lock+0x136/0x14e0 jbd2_journal_lock_updates+0x162/0x310 ext4_change_inode_journal_flag+0x183/0x540 ext4_fileattr_set+0x142b/0x18c0 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.5/12879: #0: ffff88800fbda438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf6b/0x15d0 #1: ffff88801c2a2bc0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90 #2: ffff88801c2a2d60 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x122/0x540 #3: ffff88800fbdcb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17b/0x540 stack backtrace: CPU: 0 PID: 12879 Comm: syz-executor.5 Not tainted 6.1.0-rc3-next-20221107 #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+0x1a6/0x530 __mutex_lock+0x136/0x14e0 jbd2_journal_lock_updates+0x162/0x310 ext4_change_inode_journal_flag+0x183/0x540 ext4_fileattr_set+0x142b/0x18c0 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: 0033:0x7f7c20778b19 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:00007f7c1dcee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7c2088bf60 RCX: 00007f7c20778b19 RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000003 RBP: 00007f7c207d2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeba5475ff R14: 00007f7c1dcee300 R15: 0000000000022000 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd audit: type=1326 audit(1667818323.426:29): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=13140 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f763793fb19 code=0x0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1326 audit(1667818324.255:30): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=13140 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f763793fb19 code=0x0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1667818324.437:31): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=13172 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f763793fb19 code=0x0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1667818325.406:32): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=13203 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f763793fb19 code=0x0 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Bluetooth: hci2: Opcode 0x c03 failed: -110