Hello, syzbot found the following issue on: HEAD commit: 9eaa88c7036e Merge tag 'libata-5.16-rc6' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11872543b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa556098924b78f0 dashboard link: https://syzkaller.appspot.com/bug?extid=304cbc9725238275b855 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=154716a3b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111e92dbb00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+304cbc9725238275b855@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task syz-executor812:3663 blocked for more than 165 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor812 state:D stack:27552 pid: 3663 ppid: 3654 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] context_switch kernel/sched/core.c:4972 [inline] kernel/sched/core.c:6253 __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock_common kernel/locking/mutex.c:680 [inline] kernel/locking/mutex.c:740 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740 kernel/locking/mutex.c:740 cgroup_css_set_fork kernel/cgroup/cgroup.c:6090 [inline] cgroup_css_set_fork kernel/cgroup/cgroup.c:6090 [inline] kernel/cgroup/cgroup.c:6206 cgroup_can_fork+0x888/0xeb0 kernel/cgroup/cgroup.c:6206 kernel/cgroup/cgroup.c:6206 copy_process+0x3636/0x75a0 kernel/fork.c:2292 kernel/fork.c:2292 kernel_clone+0xe7/0xab0 kernel/fork.c:2582 kernel/fork.c:2582 __do_sys_clone3+0x1ca/0x2e0 kernel/fork.c:2857 kernel/fork.c:2857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbc074509a9 RSP: 002b:00007fbc074022f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 00007fbc074509a9 RDX: 00007fbc074509a9 RSI: 0000000000000058 RDI: 0000000020000080 RBP: 00007fbc074d8408 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc074d8400 R13: 00007fbc074d840c R14: 00007fbc074a6074 R15: 0000000280000000 </TASK> INFO: task syz-executor812:3664 blocked for more than 172 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor812 state:D stack:27552 pid: 3664 ppid: 1 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] context_switch kernel/sched/core.c:4972 [inline] kernel/sched/core.c:6253 __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock_common kernel/locking/mutex.c:680 [inline] kernel/locking/mutex.c:740 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740 kernel/locking/mutex.c:740 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
