====================================================== WARNING: possible circular locking dependency detected 6.0.0-next-20221017 #1 Not tainted ------------------------------------------------------ syz-executor.2/77949 is trying to acquire lock: ffff888010182170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x15e/0x310 but task is already holding lock: ffff888010180b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530 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+0x4d/0x350 ext4_ind_migrate+0x237/0x830 ext4_fileattr_set+0x144e/0x18c0 vfs_fileattr_set+0x77c/0xb80 do_vfs_ioctl+0xfc1/0x1610 __x64_sys_ioctl+0x10c/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&sb->s_type->i_mutex_key#6){++++}-{3:3}: down_read+0x98/0x450 ext4_bmap+0x4e/0x470 bmap+0xac/0x120 jbd2_journal_bmap+0xa8/0x180 jbd2_journal_flush+0x853/0xc00 __ext4_ioctl+0x9e9/0x40a0 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: mutex_lock_io_nested+0x148/0x1310 jbd2_journal_flush+0x19a/0xc00 __ext4_ioctl+0x9e9/0x40a0 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&journal->j_barrier){+.+.}-{3:3}: __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 __mutex_lock+0x136/0x14d0 jbd2_journal_lock_updates+0x15e/0x310 ext4_change_inode_journal_flag+0x17f/0x530 ext4_fileattr_set+0x1427/0x18c0 vfs_fileattr_set+0x77c/0xb80 do_vfs_ioctl+0xfc1/0x1610 __x64_sys_ioctl+0x10c/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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.2/77949: #0: ffff88801008e438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf86/0x1610 #1: ffff88801e71c990 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb80 #2: ffff88801e71cb30 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x11e/0x530 #3: ffff888010180b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530 stack backtrace: CPU: 1 PID: 77949 Comm: syz-executor.2 Not tainted 6.0.0-next-20221017 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 check_noncircular+0x263/0x2e0 __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 __mutex_lock+0x136/0x14d0 jbd2_journal_lock_updates+0x15e/0x310 ext4_change_inode_journal_flag+0x17f/0x530 ext4_fileattr_set+0x1427/0x18c0 vfs_fileattr_set+0x77c/0xb80 do_vfs_ioctl+0xfc1/0x1610 __x64_sys_ioctl+0x10c/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7a2d4a9b19 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:00007f7a2aa1f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7a2d5bcf60 RCX: 00007f7a2d4a9b19 RDX: 0000000020000080 RSI: 0000000040086602 RDI: 0000000000000007 RBP: 00007f7a2d503f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe02bf0e1f R14: 00007f7a2aa1f300 R15: 0000000000022000 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. EXT4-fs warning (device sda): __ext4_ioctl:1238: Setting inode version is not supported with metadata_csum enabled. EXT4-fs warning (device sda): __ext4_ioctl:1238: Setting inode version is not supported with metadata_csum enabled. EXT4-fs warning (device sda): __ext4_ioctl:1238: Setting inode version is not supported with metadata_csum enabled. EXT4-fs warning (device sda): __ext4_ioctl:1238: Setting inode version is not supported with metadata_csum enabled. tmpfs: Bad value for 'gid' tmpfs: Bad value for 'gid' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'gid' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 tmpfs: Bad value for 'mpol' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 tmpfs: Bad value for 'gid' tmpfs: Bad value for 'mpol' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 tmpfs: Bad value for 'gid' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 tmpfs: Bad value for 'mpol' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 tmpfs: Bad value for 'mpol' SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' audit: type=1400 audit(1666004611.562:64): avc: denied { associate } for pid=82046 comm="syz-executor.5" name="ssh.service" dev="cgroup2" ino=1076 scontext=system_u:object_r:restorecond_exec_t:s0 tcontext=system_u:object_r:cgroup_t:s0 tclass=filesystem permissive=1 tmpfs: Bad value for 'mpol'