x_tables: ip6_tables: realm match: used from hooks PREROUTING, but only valid from INPUT/FORWARD/OUTPUT/POSTROUTING FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) INFO: task kworker/1:3:3987 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D28128 3987 2 0x80000000 x_tables: ip6_tables: realm match: used from hooks PREROUTING, but only valid from INPUT/FORWARD/OUTPUT/POSTROUTING Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 FAT-fs (loop5): Unrecognized mount option "£—X.×úC&ýq&”?<郟" or missing value usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:697 x_tables: ip6_tables: realm match: used from hooks PREROUTING, but only valid from INPUT/FORWARD/OUTPUT/POSTROUTING usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:692 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) usb_start_wait_urb+0x252/0x4c0 drivers/usb/core/message.c:63 x_tables: ip6_tables: realm match: used from hooks PREROUTING, but only valid from INPUT/FORWARD/OUTPUT/POSTROUTING usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152 usb_get_descriptor+0xc5/0x1b0 drivers/usb/core/message.c:654 FAT-fs (loop5): Unrecognized mount option "£—X.×úC&ýq&”?<郟" or missing value usb_get_device_descriptor+0x81/0xf0 drivers/usb/core/message.c:926 hub_port_init+0x74b/0x3120 drivers/usb/core/hub.c:4799 hub_port_connect drivers/usb/core/hub.c:5070 [inline] hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] port_event drivers/usb/core/hub.c:5361 [inline] hub_event+0x1ccd/0x44a0 drivers/usb/core/hub.c:5441 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: gfs2: invalid mount option: euid>00000000000000060929 gfs2: can't parse mount arguments 1 lock held by khungtaskd/1571: #0: 000000000d20538c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7807: #0: 00000000f622a401 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.5/8151: #0: 000000003d799cdf (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000003d799cdf (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 3 locks held by kworker/u4:0/17364: 5 locks held by kworker/1:3/3987: #0: 0000000044c2e015 ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000b09fc759 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) #2: 00000000ffa6c3aa (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #2: 00000000ffa6c3aa (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387 #3: 00000000db733ac7 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline] #3: 00000000db733ac7 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline] #3: 00000000db733ac7 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] #3: 00000000db733ac7 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline] #3: 00000000db733ac7 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441 #4: 0000000019675e04 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578 2 locks held by agetty/4385: #0: 000000000605639e (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000423ed59c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 2 locks held by kworker/1:4/653: #0: 000000003fff755c ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 FAT-fs (loop5): bogus number of reserved sectors #1: 000000007e3c6238 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 FAT-fs (loop5): Can't find a valid FAT filesystem 1 lock held by syz-executor.5/3317: 1 lock held by syz-executor.2/3324: 2 locks held by syz-executor.4/3328: 2 locks held by syz-executor.5/3330: #0: 000000003d799cdf (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000003d799cdf (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000000d20538c (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000000d20538c (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3324 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff888222f8fe20 EFLAGS: 00000202 RAX: 0000000000035ff4 RBX: ffff8880b5b74578 RCX: ffffc90007a29000 RDX: 1ffff11016b6e8bd RSI: ffffffff81a345e6 RDI: ffff8880b5b745e8 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff888222f8feb0 R13: ffff88808fa8387c R14: 0000000000000000 R15: ffff88808fa83820 FS: 00007f00f2a8e700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020047008 CR3: 0000000205fa9000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: percpu_up_read_preempt_enable include/linux/percpu-rwsem.h:100 [inline] percpu_up_read include/linux/percpu-rwsem.h:108 [inline] __sb_end_write+0x96/0x100 fs/super.c:1353 file_end_write include/linux/fs.h:2793 [inline] vfs_write+0x3d7/0x540 fs/read_write.c:555 ksys_pwrite64 fs/read_write.c:653 [inline] __do_sys_pwrite64 fs/read_write.c:663 [inline] __se_sys_pwrite64 fs/read_write.c:660 [inline] __x64_sys_pwrite64+0x1f7/0x250 fs/read_write.c:660 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f00f40cc247 Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b RSP: 002b:00007f00f2a8df00 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f00f4162a20 RCX: 00007f00f40cc247 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000aaaac3f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000003 R14: 00000000200475f8 R15: 0000000000002db5