INFO: task udevd:7000 blocked for more than 143 seconds. Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:7000 tgid:7000 ppid:6134 task_flags:0x400140 flags:0x00000019 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T) __sch context_switch kernel/sched/core.c:5396 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 io_schedule+0x84/0xf0 kernel/sched/core.c:7723 folio_wait_bit_common+0x56c/0x9e0 mm/filemap.c:1317 folio_put_wait_locked mm/filemap.c:1481 [inline] do_read_cache_folio+0x23c/0x5bc mm/filemap.c:3876 read_cache_folio+0x68/0x88 mm/filemap.c:3926 read_mapping_folio include/linux/pagemap.h:972 [inline] read_part_sector+0xcc/0x6fc block/partitions/core.c:722 adfspart_check_POWERTEC+0x90/0xd5c block/partitions/acorn.c:454 check_partition block/partitions/core.c:141 [inline] blk_add_partitions block/partitions/core.c:589 [inline] bdev_disk_changed+0x674/0x11fc block/partitions/core.c:693 blkdev_get_whole+0x2b0/0x4a4 block/bdev.c:748 bdev_open+0x3b0/0xc20 block/bdev.c:957 blkdev_open+0x300/0x440 block/fops.c:676 do_dentry_open+0xb7c/0x1544 fs/open.c:964 vfs_open+0x44/0x2d4 fs/open.c:1094 do_open fs/namei.c:3887 [inline] path_openat+0x2424/0x2c40 fs/namei.c:4046 do_filp_open+0x18c/0x36c fs/namei.c:4073 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f819e40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA0/43: 3 locks held by kworker/u8:5/158: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff800099fc7bc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:8/1963: #0: ffff0000d214c948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009fed7bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by klogd/6123: 2 locks held by dhcpcd/6188: #0: ffff8000928572c8 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x5b4/0x84c net/socket.c:1273 #1: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/6284: #0: ffff0000d269f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b9be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by kworker/u8:14/6778: #0: ffff0000c18a2148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009f1a7bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092865ed0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x6c0 net/core/net_namespace.c:662 #3: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by udevd/7000: #0: ffff0000ca331358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:945 3 locks held by kworker/u8:16/7471: 2 locks held by syz-executor/14157: #0: ffff800091654300 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4054 1 lock held by syz.1.2088/14296: 1 lock held by syz.4.2090/14305: #0: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.2.2092/14312: #0: ffff800092872a68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 =============================================