INFO: task syz.0.16:5249 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack: 0 pid: 5249 ppid: 4917 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xcb8/0x13f4 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:3529 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 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.1.17:5262 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: 5262 ppid: 4924 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xcb8/0x13f4 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:3529 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 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.3.19:5265 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.19 state:D stack: 0 pid: 5265 ppid: 4925 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xcb8/0x13f4 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:3529 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 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: 3 locks held by kworker/0:0/7: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001b2d7c00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by khungtaskd/27: #0: ffff8000143513a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 3 locks held by kworker/u4:2/148: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001be47c00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/0:2/1541: #0: ffff0000d3536d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff8000237b7c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 2 locks held by getty/3803: #0: ffff0000d3cc7098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001b7b32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 4 locks held by kworker/u4:5/4170: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f057c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162a2e50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa98 net/core/net_namespace.c:589 #3: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/1:24/4870: #0: ffff0000d3536d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f377c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 2 locks held by kworker/u4:6/4979: 3 locks held by syz.0.16/5241: 2 locks held by syz.0.16/5249: #0: ffff0000d640e460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7578188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7578188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7578188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.1.17/5255: 2 locks held by syz.1.17/5262: #0: ffff0000ddb00460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e75786d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e75786d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e75786d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.3.19/5257: 2 locks held by syz.3.19/5265: #0: ffff0000d7048460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67c188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67c188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67c188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.2.18/5469: 2 locks held by syz.2.18/5474: #0: ffff0000ed72e460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67c6d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67c6d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67c6d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.4.20/5487: 2 locks held by syz.4.20/5490: #0: ffff0000d007e460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67cc18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67cc18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67cc18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.5.21/5685: 2 locks held by syz.5.21/5686: #0: ffff0000c1984460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67d160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67d160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67d160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.6.22/5698: 2 locks held by syz.6.22/5700: #0: ffff0000d6ed4460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67d6a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67d6a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67d6a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.7.23/5702: 2 locks held by syz.7.23/5703: #0: ffff0000cef02460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7578c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7578c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7578c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.9.25/5737: 2 locks held by syz.9.25/5740: #0: ffff0000ee4ee460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7579160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7579160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7579160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.8.24/5739: 2 locks held by syz.8.24/5741: #0: ffff0000da3b2460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ef67dbf0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ef67dbf0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000ef67dbf0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by udevd/11359: 3 locks held by syz-executor/11712: #0: ffff800016309bb0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:802 #1: ffff800016309a08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffff800016309a08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x110/0xb6c net/netlink/genetlink.c:790 #2: ffff8000162ae728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 1 lock held by syz.4.3274/12393: =============================================