./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2276228181 <...> Warning: Permanently added '10.128.0.142' (ECDSA) to the list of known hosts. execve("./syz-executor2276228181", ["./syz-executor2276228181"], 0x7ffea6b00f90 /* 10 vars */) = 0 brk(NULL) = 0x555557332000 brk(0x555557332c40) = 0x555557332c40 arch_prctl(ARCH_SET_FS, 0x555557332300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2276228181", 4096) = 28 brk(0x555557353c40) = 0x555557353c40 brk(0x555557354000) = 0x555557354000 mprotect(0x7fc0b020d000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "memory.events", O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_APPEND|FASYNC|0x20, 000) = 3 openat(AT_FDCWD, "memory.events", O_RDWR|__O_SYNC) = 4 ioctl(4, _IOC(_IOC_WRITE, 0x66, 0x2b, 0x4), 0x200005c0) = 0 openat(AT_FDCWD, "blkio.bfq.io_merged", O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_APPEND|FASYNC|0x20, 000) = 5 syzkaller login: [ 48.967030][ T3606] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 49.035406][ T3606] [ 49.047009][ T3606] ====================================================== [ 49.054008][ T3606] WARNING: possible circular locking dependency detected [ 49.061032][ T3606] 5.19.0-syzkaller-13946-g0947ae112108 #0 Not tainted [ 49.067778][ T3606] ------------------------------------------------------ [ 49.074783][ T3606] syz-executor227/3606 is trying to acquire lock: [ 49.081188][ T3606] ffff88814abd6170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x15e/0x310 [ 49.091607][ T3606] [ 49.091607][ T3606] but task is already holding lock: [ 49.098955][ T3606] ffff88814abd4bd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x178/0x530 [ 49.110270][ T3606] [ 49.110270][ T3606] which lock already depends on the new lock. [ 49.110270][ T3606] [ 49.120659][ T3606] [ 49.120659][ T3606] the existing dependency chain (in reverse order) is: [ 49.129658][ T3606] [ 49.129658][ T3606] -> #4 (&sbi->s_writepages_rwsem){++++}-{0:0}: [ 49.138080][ T3606] percpu_down_write+0x4d/0x440 [ 49.143461][ T3606] ext4_change_inode_journal_flag+0x178/0x530 [ 49.150062][ T3606] ext4_fileattr_set+0xddf/0x1930 [ 49.155706][ T3606] vfs_fileattr_set+0x7f5/0xbe0 [ 49.161079][ T3606] do_vfs_ioctl+0xe62/0x15c0 [ 49.166188][ T3606] __x64_sys_ioctl+0x108/0x200 [ 49.171468][ T3606] do_syscall_64+0x35/0xb0 [ 49.176402][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.182827][ T3606] [ 49.182827][ T3606] -> #3 (mapping.invalidate_lock){++++}-{3:3}: [ 49.191163][ T3606] down_write+0x90/0x150 [ 49.195925][ T3606] ext4_setattr+0xd9e/0x2c50 [ 49.201040][ T3606] notify_change+0xcd0/0x1440 [ 49.206235][ T3606] do_truncate+0x13c/0x200 [ 49.211173][ T3606] do_sys_ftruncate+0x536/0x730 [ 49.216543][ T3606] do_syscall_64+0x35/0xb0 [ 49.221476][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.227895][ T3606] [ 49.227895][ T3606] -> #2 (&sb->s_type->i_mutex_key#8){++++}-{3:3}: [ 49.236497][ T3606] down_read+0x98/0x450 [ 49.241169][ T3606] ext4_bmap+0x4e/0x460 [ 49.245842][ T3606] bmap+0xaa/0x120 [ 49.250091][ T3606] jbd2_journal_bmap+0xa8/0x180 [ 49.255549][ T3606] jbd2_journal_flush+0x84f/0xc00 [ 49.261090][ T3606] __ext4_ioctl+0x28fd/0x4ab0 [ 49.266293][ T3606] __x64_sys_ioctl+0x193/0x200 [ 49.271576][ T3606] do_syscall_64+0x35/0xb0 [ 49.276510][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.282938][ T3606] [ 49.282938][ T3606] -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: [ 49.291810][ T3606] mutex_lock_io_nested+0x13f/0x1190 [ 49.297614][ T3606] jbd2_journal_flush+0x19a/0xc00 [ 49.303159][ T3606] __ext4_ioctl+0x28fd/0x4ab0 [ 49.308356][ T3606] __x64_sys_ioctl+0x193/0x200 [ 49.313638][ T3606] do_syscall_64+0x35/0xb0 [ 49.318572][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.324989][ T3606] [ 49.324989][ T3606] -> #0 (&journal->j_barrier){+.+.}-{3:3}: [ 49.332977][ T3606] __lock_acquire+0x2a43/0x56d0 [ 49.338360][ T3606] lock_acquire+0x1ab/0x570 [ 49.343380][ T3606] __mutex_lock+0x12f/0x1350 [ 49.348488][ T3606] jbd2_journal_lock_updates+0x15e/0x310 [ 49.354642][ T3606] ext4_change_inode_journal_flag+0x180/0x530 [ 49.361232][ T3606] ext4_fileattr_set+0xddf/0x1930 [ 49.366779][ T3606] vfs_fileattr_set+0x7f5/0xbe0 [ 49.372154][ T3606] do_vfs_ioctl+0xe62/0x15c0 [ 49.377261][ T3606] __x64_sys_ioctl+0x108/0x200 [ 49.382540][ T3606] do_syscall_64+0x35/0xb0 [ 49.387489][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.393909][ T3606] [ 49.393909][ T3606] other info that might help us debug this: [ 49.393909][ T3606] [ 49.404124][ T3606] Chain exists of: [ 49.404124][ T3606] &journal->j_barrier --> mapping.invalidate_lock --> &sbi->s_writepages_rwsem [ 49.404124][ T3606] [ 49.418978][ T3606] Possible unsafe locking scenario: [ 49.418978][ T3606] [ 49.426427][ T3606] CPU0 CPU1 [ 49.431791][ T3606] ---- ---- [ 49.437143][ T3606] lock(&sbi->s_writepages_rwsem); [ 49.442353][ T3606] lock(mapping.invalidate_lock); [ 49.449989][ T3606] lock(&sbi->s_writepages_rwsem); [ 49.457715][ T3606] lock(&journal->j_barrier); [ 49.462590][ T3606] [ 49.462590][ T3606] *** DEADLOCK *** [ 49.462590][ T3606] [ 49.470750][ T3606] 4 locks held by syz-executor227/3606: [ 49.476315][ T3606] #0: ffff88814abd2460 (sb_writers#4){.+.+}-{0:0}, at: do_vfs_ioctl+0xe27/0x15c0 [ 49.485586][ T3606] #1: ffff88807511a218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xbe0 [ 49.496306][ T3606] #2: ffff88807511a3b8 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x11f/0x530 [ 49.507973][ T3606] #3: ffff88814abd4bd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x178/0x530 [ 49.519725][ T3606] [ 49.519725][ T3606] stack backtrace: [ 49.525605][ T3606] CPU: 1 PID: 3606 Comm: syz-executor227 Not tainted 5.19.0-syzkaller-13946-g0947ae112108 #0 [ 49.535752][ T3606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 49.545806][ T3606] Call Trace: [ 49.549081][ T3606] [ 49.552006][ T3606] dump_stack_lvl+0xcd/0x134 [ 49.556602][ T3606] check_noncircular+0x25f/0x2e0 [ 49.561556][ T3606] ? print_circular_bug+0x1e0/0x1e0 [ 49.566774][ T3606] ? check_irq_usage+0x183/0xac0 [ 49.571726][ T3606] ? check_path.constprop.0+0x50/0x50 [ 49.577110][ T3606] ? print_shortest_lock_dependencies_backwards+0x80/0x80 [ 49.584230][ T3606] __lock_acquire+0x2a43/0x56d0 [ 49.589108][ T3606] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 49.595097][ T3606] lock_acquire+0x1ab/0x570 [ 49.599602][ T3606] ? jbd2_journal_lock_updates+0x15e/0x310 [ 49.605415][ T3606] ? lock_release+0x780/0x780 [ 49.610093][ T3606] ? find_held_lock+0x2d/0x110 [ 49.614869][ T3606] __mutex_lock+0x12f/0x1350 [ 49.619461][ T3606] ? jbd2_journal_lock_updates+0x15e/0x310 [ 49.625274][ T3606] ? jbd2_journal_lock_updates+0x15e/0x310 [ 49.631083][ T3606] ? mutex_lock_io_nested+0x1190/0x1190 [ 49.636632][ T3606] ? jbd2_journal_lock_updates+0x150/0x310 [ 49.642438][ T3606] ? lock_downgrade+0x6e0/0x6e0 [ 49.647288][ T3606] ? do_raw_read_unlock+0x70/0x70 [ 49.652315][ T3606] ? rcu_sync_enter+0x150/0x2e0 [ 49.657169][ T3606] jbd2_journal_lock_updates+0x15e/0x310 [ 49.662825][ T3606] ? jbd2_journal_wait_updates+0x240/0x240 [ 49.668638][ T3606] ext4_change_inode_journal_flag+0x180/0x530 [ 49.674730][ T3606] ext4_fileattr_set+0xddf/0x1930 [ 49.679764][ T3606] ? ext4_fileattr_get+0x280/0x280 [ 49.684884][ T3606] ? apparmor_capable+0x1d8/0x460 [ 49.689912][ T3606] ? bpf_lsm_capable+0x5/0x10 [ 49.694595][ T3606] ? security_capable+0x8f/0xc0 [ 49.699450][ T3606] vfs_fileattr_set+0x7f5/0xbe0 [ 49.704302][ T3606] ? ioctl_file_clone+0x100/0x100 [ 49.709329][ T3606] ? memset+0x20/0x40 [ 49.713317][ T3606] do_vfs_ioctl+0xe62/0x15c0 [ 49.717906][ T3606] ? vfs_fileattr_set+0xbe0/0xbe0 [ 49.722934][ T3606] ? find_held_lock+0x2d/0x110 [ 49.727702][ T3606] ? name_to_dev_t+0x880/0x990 [ 49.732466][ T3606] ? lock_downgrade+0x6e0/0x6e0 [ 49.737317][ T3606] ? _raw_spin_unlock_irq+0x1f/0x40 [ 49.742530][ T3606] ? bpf_lsm_file_ioctl+0x5/0x10 [ 49.747484][ T3606] __x64_sys_ioctl+0x108/0x200 [ 49.752250][ T3606] do_syscall_64+0x35/0xb0 [ 49.756669][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 49.762567][ T3606] RIP: 0033:0x7fc0b01a0bc9 [ 49.766978][ T3606] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 ioctl(5, FS_IOC_SETFLAGS, [FS_UNRM_FL|FS_COMPR_FL|FS_SYNC_FL|FS_APPEND_FL|FS_NOATIME_FL|FS_DIRTY_FL|FS_ENCRYPT_FL|FS_JOURNAL_DATA_FL|FS_NOTAIL_FL]) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 49.786583][ T3606] RS