INFO: task syz.0.17:5978 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:28072 pid:5978 ppid:5903 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832 rwsem_down_read_slowpath+0x4f8/0x840 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x98/0x2e0 kernel/locking/rwsem.c:1522 inode_lock_shared include/linux/fs.h:814 [inline] open_last_lookups fs/namei.c:3555 [inline] path_openat+0x7b7/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_open_execat+0x133/0x3d0 fs/exec.c:924 bprm_execve+0x567/0x16f0 fs/exec.c:1867 do_execveat_common+0x51b/0x6c0 fs/exec.c:1998 do_execveat fs/exec.c:2083 [inline] __do_sys_execveat fs/exec.c:2157 [inline] __se_sys_execveat fs/exec.c:2151 [inline] __x64_sys_execveat+0xc4/0xe0 fs/exec.c:2151 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f091d98eba9 RSP: 002b:00007f091e7d2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f091dbd6090 RCX: 00007f091d98eba9 RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007f091da11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f091dbd6128 R14: 00007f091dbd6090 R15: 00007fff30db5198 INFO: task syz.1.18:6014 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.18 state:D stack:28072 pid:6014 ppid:5908 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832 rwsem_down_read_slowpath+0x4f8/0x840 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x98/0x2e0 kernel/locking/rwsem.c:1522 inode_lock_shared include/linux/fs.h:814 [inline] open_last_lookups fs/namei.c:3555 [inline] path_openat+0x7b7/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_open_execat+0x133/0x3d0 fs/exec.c:924 bprm_execve+0x567/0x16f0 fs/exec.c:1867 do_execveat_common+0x51b/0x6c0 fs/exec.c:1998 do_execveat fs/exec.c:2083 [inline] __do_sys_execveat fs/exec.c:2157 [inline] __se_sys_execveat fs/exec.c:2151 [inline] __x64_sys_execveat+0xc4/0xe0 fs/exec.c:2151 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f442578eba9 RSP: 002b:00007f442662c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f44259d6090 RCX: 00007f442578eba9 RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007f4425811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f44259d6128 R14: 00007f44259d6090 R15: 00007ffc2f7cef28 Showing all locks held in the system: 2 locks held by kworker/u4:0/11: #0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #0: ffff888017871538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #1: ffff88802ba30a18 (&p->pi_lock){-.-.}-{2:2}, at: process_one_work kernel/workqueue.c:2609 [inline] #1: ffff88802ba30a18 (&p->pi_lock){-.-.}-{2:2}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 1 lock held by khungtaskd/29: #0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #0: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633 1 lock held by kswapd0/86: 4 locks held by kworker/u4:9/2953: 1 lock held by udevd/5160: 2 locks held by getty/5553: #0: ffff88814c7a60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217 1 lock held by syz.0.17/5968: 2 locks held by syz.0.17/5978: #0: ffff8880269e63c8 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff8880269e63c8 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.1.18/6013: 2 locks held by syz.1.18/6014: #0: ffff888027101988 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff888027101988 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff8880594f8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff8880594f8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff8880594f8198 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.2.19/6016: 2 locks held by syz.2.19/6017: #0: ffff888027675d08 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff888027675d08 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 2 locks held by syz.3.20/6019: 2 locks held by syz.3.20/6020: #0: ffff888027100548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff888027100548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 2 locks held by syz.4.21/6069: 2 locks held by syz.4.21/6070: #0: ffff888028155d08 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff888028155d08 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff8880594f86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff8880594f86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff8880594f86e0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.5.22/6144: 2 locks held by syz.5.22/6145: #0: ffff88802a78a708 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff88802a78a708 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.6.23/6152: 2 locks held by syz.6.23/6153: #0: ffff88802a788548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff88802a788548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff8880594f8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff8880594f8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff8880594f8c28 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.7.24/6155: 2 locks held by syz.7.24/6156: #0: ffff888028153488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff888028153488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d96b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d96b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d96b8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by syz.8.25/6175: 2 locks held by syz.8.25/6176: #0: ffff8880291c0548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff8880291c0548 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff88805d5d9c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff88805d5d9c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff88805d5d9c00 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 2 locks held by syz.9.26/6265: 2 locks held by syz.9.26/6266: #0: ffff8880291c3488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1499 [inline] #0: ffff8880291c3488 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xca/0x16f0 fs/exec.c:1854 #1: ffff8880594f9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline] #1: ffff8880594f9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff8880594f9170 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b7/0x3190 fs/namei.c:3786 1 lock held by udevd/6276: 1 lock held by udevd/6561: 1 lock held by syz.2.180/6770: #0: ffff8880b8f3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 1 lock held by syz.1.182/6773: #0: ffff8880b8f3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558