EXT4-fs (loop7): ext4_check_descriptors: Checksum for group 0 failed (60729!=0) EXT4-fs error (device loop7): ext4_fill_super:4978: inode #2: comm syz-executor.7: iget: root inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed INFO: task syz-executor.7:9077 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.7 state:D stack:27952 pid: 9077 ppid: 5901 flags:0x10000004 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 perf_event_init_context kernel/events/core.c:12887 [inline] perf_event_init_task+0x252/0x800 kernel/events/core.c:12962 copy_process+0x1721/0x66f0 kernel/fork.c:2079 kernel_clone+0xe7/0xa20 kernel/fork.c:2466 __do_sys_clone+0xc8/0x110 kernel/fork.c:2583 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7b6cb0ff41 RSP: 002b:00007ffef7b563c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f7b6a021700 RCX: 00007f7b6cb0ff41 RDX: 00007f7b6a0219d0 RSI: 00007f7b6a0212f0 RDI: 00000000003d0f00 RBP: 00007ffef7b56600 R08: 00007f7b6a021700 R09: 00007f7b6a021700 R10: 00007f7b6a0219d0 R11: 0000000000000206 R12: 00007ffef7b5647e R13: 00007ffef7b5647f R14: 00007f7b6a021300 R15: 0000000000022000 INFO: task syz-executor.7:9081 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.7 state:D stack:27696 pid: 9081 ppid: 5901 flags:0x10004004 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 mutex_lock_double kernel/events/core.c:11664 [inline] __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] __do_sys_perf_event_open+0x1244/0x2cb0 kernel/events/core.c:11996 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7b6cb0eb19 RSP: 002b:00007f7b6a084188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f7b6cc21f60 RCX: 00007f7b6cb0eb19 RDX: 0000000000000000 RSI: 00000000000000eb RDI: 0000000020001d80 RBP: 00007f7b6cb68f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef7b5647f R14: 00007f7b6a084300 R15: 0000000000022000 INFO: task syz-executor.7:9086 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.7 state:D stack:28688 pid: 9086 ppid: 9081 flags:0x10004006 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 perf_event_ctx_lock_nested+0x243/0x4a0 kernel/events/core.c:1386 perf_event_ctx_lock kernel/events/core.c:1399 [inline] perf_event_release_kernel+0x3a6/0xc20 kernel/events/core.c:5072 perf_release+0x33/0x40 kernel/events/core.c:5170 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xc1b/0x2770 kernel/exit.c:811 do_group_exit+0x125/0x310 kernel/exit.c:908 get_signal+0x469/0x2200 kernel/signal.c:2748 arch_do_signal+0x8c/0x1c60 arch/x86/kernel/signal.c:805 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xf7/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7b6cb0eb19 RSP: 002b:00007f7b6a084218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f7b6cc21f68 RCX: 00007f7b6cb0eb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7b6cc21f68 RBP: 00007f7b6cc21f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b6cc21f6c R13: 00007ffef7b5647f R14: 00007f7b6a084300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: ffffffff84df7460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6389 3 locks held by systemd-journal/103: 1 lock held by in:imklog/178: 1 lock held by syz-executor.7/9077: #0: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_init_context kernel/events/core.c:12887 [inline] #0: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_init_task+0x252/0x800 kernel/events/core.c:12962 3 locks held by syz-executor.7/9081: #0: ffff88801a7d3358 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0xfc1/0x2cb0 kernel/events/core.c:11978 #1: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11663 [inline] #1: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] #1: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1237/0x2cb0 kernel/events/core.c:11996 #2: ffff888049cae8b0 (&ctx->mutex/1){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11664 [inline] #2: ffff888049cae8b0 (&ctx->mutex/1){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] #2: ffff888049cae8b0 (&ctx->mutex/1){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1244/0x2cb0 kernel/events/core.c:11996 1 lock held by syz-executor.7/9086: #0: ffff888049cae8b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_ctx_lock_nested+0x243/0x4a0 kernel/events/core.c:1386 =============================================