INFO: task syz.9.8 INFO: task syz.9.880:8689 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.880 state:D stack:0 pid:8689 tgid:8689 ppid:7121 task_flags:0x400040 flags:0x00800019 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5387 [inline] __schedule+0x1b74/0x2d24 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0xa4/0x140 kernel/sched/core.c:7282 request_wait_answer fs/fuse/dev.c:590 [inline] __fuse_request_send fs/fuse/dev.c:604 [inline] __fuse_simple_request+0xaf0/0x1328 fs/fuse/dev.c:699 fuse_simple_request fs/fuse/fuse_i.h:1262 [inline] fuse_flush+0x3fc/0x5e4 fs/fuse/file.c:500 filp_flush+0xb8/0x190 fs/open.c:1467 filp_close+0x28/0x48 fs/open.c:1480 __range_close fs/file.c:794 [inline] __do_sys_close_range fs/file.c:855 [inline] __se_sys_close_range fs/file.c:819 [inline] __arm64_sys_close_range+0x354/0x808 fs/file.c:819 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3869 2 locks held by pr/ttyAMA-1/41: 2 locks held by getty/4448: #0: ffff0000d36ba0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009228b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211 1 lock held by syz.9.1243/10880: #0: ffff0000dd332140 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #0: ffff0000dd332140 (&dev->mutex){....}-{4:4}, at: nfc_unregister_rfkill+0x68/0x268 net/nfc/core.c:1166 4 locks held by syz.9.1243/10886: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 #2: ffff0000dd332140 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #2: ffff0000dd332140 (&dev->mutex){....}-{4:4}, at: nfc_dev_up+0x40/0x308 net/nfc/core.c:95 #3: ffff00010e1de348 (&ndev->req_lock){+.+.}-{4:4}, at: nci_open_device net/nfc/nci/core.c:478 [inline] #3: ffff00010e1de348 (&ndev->req_lock){+.+.}-{4:4}, at: nci_dev_up+0xa4/0x584 net/nfc/nci/core.c:643 2 locks held by syz.5.1245/10893: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 2 locks held by syz.0.1248/10904: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 2 locks held by syz.1.1251/10913: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 2 locks held by syz.1.1251/10914: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 2 locks held by syz.1.1251/10915: #0: ffff800089bebf68 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1217 #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800089bebda0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0xec/0x620 net/netlink/genetlink.c:1208 =============================================