INFO: task syz.1.17:4977 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack: 0 pid: 4977 ppid: 4445 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xc90/0x1490 kernel/locking/rwsem.c:1165 __down_write_common kernel/locking/rwsem.c:1292 [inline] __down_write kernel/locking/rwsem.c:1301 [inline] down_write+0xe8/0x12c kernel/locking/rwsem.c:1552 inode_lock include/linux/fs.h:787 [inline] open_last_lookups fs/namei.c:3537 [inline] path_openat+0x5ec/0x2808 fs/namei.c:3747 do_filp_open+0x188/0x370 fs/namei.c:3777 do_sys_openat2+0x134/0x3fc fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __arm64_sys_openat+0x11c/0x150 fs/open.c:1282 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz.2.18:5010 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack: 0 pid: 5010 ppid: 4446 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xc90/0x1490 kernel/locking/rwsem.c:1165 __down_write_common kernel/locking/rwsem.c:1292 [inline] __down_write kernel/locking/rwsem.c:1301 [inline] down_write+0xe8/0x12c kernel/locking/rwsem.c:1552 inode_lock include/linux/fs.h:787 [inline] open_last_lookups fs/namei.c:3537 [inline] path_openat+0x5ec/0x2808 fs/namei.c:3747 do_filp_open+0x188/0x370 fs/namei.c:3777 do_sys_openat2+0x134/0x3fc fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __arm64_sys_openat+0x11c/0x150 fs/open.c:1282 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: 1 lock held by khungtaskd/27: #0: ffff8000145513e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 5 locks held by kworker/u4:2/148: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001cf87c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff80001649add0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0xab8 net/core/net_namespace.c:589 #3: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 #4: ffff0000c15f13e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_netns_pre_exit+0xb8/0x1c4 drivers/net/wireguard/device.c:409 1 lock held by udevd/3660: 2 locks held by getty/3801: #0: ffff0000d5441098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001ba562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf90 drivers/tty/n_tty.c:2158 3 locks held by kworker/1:4/4074: #0: ffff0000d3522d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001f6c7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/1:6/4151: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001fc97c40 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/0:7/4216: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001f587c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff0000d733f240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d8/0x27c4 drivers/net/netdevsim/fib.c:1480 3 locks held by kworker/0:17/4619: #0: ffff0000d3522d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff8000203d7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by syz.1.17/4965: 2 locks held by syz.1.17/4977: #0: ffff0000cd6ce460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000eda64188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000eda64188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000eda64188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.2.18/5004: 2 locks held by syz.2.18/5010: #0: ffff0000d9194460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000eda646d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000eda646d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000eda646d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.0.16/5060: 2 locks held by syz.0.16/5066: #0: ffff0000d2c68460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000edae0188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000edae0188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000edae0188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.3.19/5074: 2 locks held by syz.3.19/5076: #0: ffff0000c9c1c460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000eda64c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000eda64c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000eda64c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.4.20/5083: 2 locks held by syz.4.20/5095: #0: ffff0000d6f6a460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000edae06d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000edae06d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000edae06d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 2 locks held by syz.5.21/5327: 2 locks held by syz.5.21/5328: #0: ffff0000ed6da460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000eda65160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000eda65160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000eda65160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.6.22/5345: 2 locks held by syz.6.22/5348: #0: ffff0000d7746460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000edae0c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000edae0c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000edae0c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz.7.23/5373: 2 locks held by syz.7.23/5374: #0: ffff0000cab38460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000edae1160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000edae1160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000edae1160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 2 locks held by syz.8.24/5377: 2 locks held by syz.8.24/5380: #0: ffff0000d86c2460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000eda656a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000eda656a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000eda656a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 2 locks held by syz.9.25/5379: 2 locks held by syz.9.25/5381: #0: ffff0000daae2460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000edae16a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000edae16a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000edae16a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5ec/0x2808 fs/namei.c:3747 1 lock held by syz-executor/11143: #0: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff8000164a6968 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x64c/0xcbc net/core/rtnetlink.c:5685 =============================================