====================================================== WARNING: possible circular locking dependency detected 6.0.0-next-20221010 #1 Not tainted ------------------------------------------------------ syz-executor.0/8168 is trying to acquire lock: ffff888010128170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x15e/0x310 but task is already holding lock: ffff88801010eb90 (&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}: ext4_writepages+0x1d2/0x3690 do_writepages+0x1b0/0x6a0 filemap_fdatawrite_wbc+0x147/0x1b0 __filemap_fdatawrite_range+0xb6/0x100 ext4_alloc_da_blocks+0x1b8/0x2e0 ext4_ind_migrate+0x700/0x830 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.0/8168: #0: ffff88801010c438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf86/0x1610 #1: ffff88801e303fa0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb80 #2: ffff88801e304140 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x11e/0x530 #3: ffff88801010eb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530 stack backtrace: CPU: 0 PID: 8168 Comm: syz-executor.0 Not tainted 6.0.0-next-20221010 #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: 0033:0x7fc6c2d17b19 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:00007fc6c028d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc6c2e2af60 RCX: 00007fc6c2d17b19 RDX: 0000000020000080 RSI: 0000000040086602 RDI: 0000000000000003 RBP: 00007fc6c2d71f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2ab2b52f R14: 00007fc6c028d300 R15: 0000000000022000 loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 256 loop5: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 loop0: detected capacity change from 0 to 256 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 loop0: detected capacity change from 0 to 256 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 2320 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A loop3: detected capacity change from 0 to 2320 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A loop3: detected capacity change from 0 to 2320 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A loop3: detected capacity change from 0 to 2320 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. loop7: detected capacity change from 0 to 1024 EXT4-fs (loop7): mounted filesystem without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem. loop7: detected capacity change from 0 to 1024 EXT4-fs (loop7): mounted filesystem without journal. Quota mode: writeback. loop3: detected capacity change from 0 to 128 loop3: detected capacity change from 0 to 128 EXT4-fs (loop7): unmounting filesystem. loop7: detected capacity change from 0 to 1024 loop3: detected capacity change from 0 to 128 EXT4-fs (loop7): mounted filesystem without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem. loop7: detected capacity change from 0 to 1024 loop3: detected capacity change from 0 to 128 EXT4-fs (loop7): mounted filesystem without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem. audit: type=1400 audit(1665398809.662:13): avc: denied { read } for pid=8734 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 cgroup: name respecified loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem. cgroup: name respecified loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem. cgroup: name respecified loop5: detected capacity change from 0 to 512