INFO: task syz-executor.0:8520 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27672 8520 7171 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007ffdfae2c530 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b33b20000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffdfae2c620 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e1d2 R14: ffffffffffffffff R15: 000000000118bf2c INFO: task syz-executor.5:8535 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27672 8535 7174 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007fff98f95700 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b2c020000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff98f957f0 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e33b R14: ffffffffffffffff R15: 000000000118bf2c INFO: task syz-executor.1:8565 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27672 8565 7200 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007ffec2d34620 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b2cc20000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffec2d34710 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e41d R14: ffffffffffffffff R15: 000000000118bf2c INFO: task syz-executor.2:8566 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27672 8566 7168 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007fffb19d2ab0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b33a20000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffb19d2ba0 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e419 R14: ffffffffffffffff R15: 000000000118bf2c INFO: task syz-executor.4:8567 blocked for more than 144 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27672 8567 7173 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007ffdf51abdf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b2be20000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffdf51abee0 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e41a R14: ffffffffffffffff R15: 000000000118bf2c INFO: task syz-executor.3:8571 blocked for more than 144 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27440 8571 7169 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4155 io_uring_cancel_files fs/io_uring.c:6281 [inline] io_uring_flush+0x41f/0x4d0 fs/io_uring.c:6290 filp_close+0x97/0x120 fs/open.c:1252 __do_sys_close fs/open.c:1271 [inline] __se_sys_close fs/open.c:1269 [inline] __x64_sys_close+0x5a/0xa0 fs/open.c:1269 do_syscall_64+0xc6/0x5e0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416981 Code: Bad RIP value. RSP: 002b:00007ffd80c15d40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416981 RDX: 0000001b33920000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffd80c15e30 R11: 0000000000000293 R12: 0000000001192f00 R13: 000000000000e423 R14: ffffffffffffffff R15: 000000000118bf2c Showing all locks held in the system: 2 locks held by kworker/u4:3/164: #0: ffff8880ae937398 (&rq->lock){-.-.}, at: newidle_balance+0xa6f/0xe80 kernel/sched/fair.c:10177 #1: ffffffff8899a0c0 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x400 kernel/sched/fair.c:5729 1 lock held by khungtaskd/1120: #0: ffffffff8899a0c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x52/0x28d kernel/locking/lockdep.c:5331 1 lock held by in:imklog/6596: #0: ffff8880a339b3a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x96/0xb0 fs/file.c:803 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1120 Comm: khungtaskd Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x128/0x182 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.7+0x4b/0x83 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x183/0x1ac lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x629/0xc70 kernel/hung_task.c:289 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 164 Comm: kworker/u4:3 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0xadc/0x4370 kernel/locking/lockdep.c:3827 Code: 29 00 00 48 81 c4 f0 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 70 2b 00 00 49 81 7d 00 a0 c8 96 8a 0f 84 e8 f5 ff ff 83 fe RSP: 0018:ffffc90001617b08 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 1ffff11012b961c3 RSI: 0000000000000000 RDI: ffff888095cb0e18 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8880a9386140 R12: 0000000000000000 R13: ffff888095cb0e18 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2fa6c3a000 CR3: 00000000968ca000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x19b/0x420 kernel/locking/lockdep.c:4484 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] batadv_nc_purge_paths+0xb8/0x300 net/batman-adv/network-coding.c:441 batadv_nc_worker+0x1e6/0x610 net/batman-adv/network-coding.c:719 process_one_work+0x8d1/0x15b0 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352