INFO: task syz.2.267:8163 blocked fo INFO: task syz.2.267:8163 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.267 state:D stack:0 pid:8163 tgid:8150 ppid:7923 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 bdev_open+0xcc/0xc20 block/bdev.c:945 bdev_file_open_by_dev+0x198/0x218 block/bdev.c:1059 swsusp_check+0x64/0x3f4 kernel/power/swap.c:1577 software_resume+0x54/0x478 kernel/power/hibernate.c:1053 resume_store+0x280/0x3a4 kernel/power/hibernate.c:1338 kobj_attr_store+0x6c/0x90 lib/kobject.c:840 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:142 kernfs_fop_write_iter+0x33c/0x4d0 fs/kernfs/file.c:352 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f76b5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/u8:2/41: 2 locks held by pr/ttyAMA-1/43: 2 locks held by getty/6335: #0: ffff0000d83a80a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bb2b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by udevd/6568: #0: ffff0000ca6a5358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:945 6 locks held by syz.2.267/8163: #0: ffff0000d9dee0f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x1fc/0x2a0 fs/file.c:1232 #1: ffff0000d89ae420 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3111 [inline] #1: ffff0000d89ae420 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x24c/0xa3c fs/read_write.c:682 #2: ffff0000d7363888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x4d0 fs/kernfs/file.c:343 #3: ffff0000c1bb0878 (kn->active#57){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline] #3: ffff0000c1bb0878 (kn->active#57){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x4d0 fs/kernfs/file.c:344 #4: ffff80008f61b7a8 (system_transition_mutex){+.+.}-{4:4}, at: software_resume+0x4c/0x478 kernel/power/hibernate.c:1052 #5: ffff0000ca6a5358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:945 1 lock held by syz-executor/8545: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 2 locks held by syz.5.345/8659: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 #1: ffff80008f61b7a8 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep+0x5c/0x84 kernel/power/main.c:57 1 lock held by syz.5.345/8660: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz.7.346/8679: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz.7.346/8684: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz.4.347/8748: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8756: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8882: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8883: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8885: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8887: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8889: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8897: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8898: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8900: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/9026: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/9028: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/9036: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/9037: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/9039: #0: ffff8000911b6ce8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 =============================================