INFO: task syz-executor.2:19078 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. syz-executor.2 D28112 19078 8127 0x00000004 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 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 usb_start_wait_urb+0x14b/0x4c0 drivers/usb/core/message.c:62 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253 proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1211 usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2435 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f64e5c07279 Code: Bad RIP value. RSP: 002b:00007f64e457c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f64e5d19f80 RCX: 00007f64e5c07279 RDX: 0000000020000180 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007f64e5c61189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc996155bf R14: 00007f64e457c300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000030813e3 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7776: 2 locks held by kworker/u4:13/5798: #0: 000000006781ca00 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000006781ca00 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 00000000030813e3 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000030813e3 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 4 locks held by syz-executor.1/26654: #0: 000000006a21a8a0 (&tty->ldisc_sem){++++}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:320 [inline] #0: 000000006a21a8a0 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:366 [inline] #0: 000000006a21a8a0 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #0: 000000006a21a8a0 (&tty->ldisc_sem){++++}, at: tty_ldisc_release+0x2a8/0x440 drivers/tty/tty_ldisc.c:805 #1: 00000000445bb4c7 (&tty->ldisc_sem/1){+.+.}, at: __tty_ldisc_lock_nested drivers/tty/tty_ldisc.c:326 [inline] #1: 00000000445bb4c7 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:368 [inline] #1: 00000000445bb4c7 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #1: 00000000445bb4c7 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_release+0x398/0x440 drivers/tty/tty_ldisc.c:805 #2: 000000007af3b7c2 (rtnl_mutex){+.+.}, at: unregister_netdev+0xe/0x20 net/core/dev.c:9345 #3: 00000000685768b0 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #3: 00000000685768b0 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 3 locks held by syz-executor.2/26667: #0: 00000000c955f659 (&tty->ldisc_sem){++++}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:320 [inline] #0: 00000000c955f659 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:366 [inline] #0: 00000000c955f659 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #0: 00000000c955f659 (&tty->ldisc_sem){++++}, at: tty_ldisc_release+0x2a8/0x440 drivers/tty/tty_ldisc.c:805 #1: 0000000026d76673 (&tty->ldisc_sem/1){+.+.}, at: __tty_ldisc_lock_nested drivers/tty/tty_ldisc.c:326 [inline] #1: 0000000026d76673 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:368 [inline] #1: 0000000026d76673 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #1: 0000000026d76673 (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_release+0x398/0x440 drivers/tty/tty_ldisc.c:805 #2: 000000007af3b7c2 (rtnl_mutex){+.+.}, at: unregister_netdev+0xe/0x20 net/core/dev.c:9345 3 locks held by syz-executor.4/26683: #0: 0000000044ea6650 (&tty->ldisc_sem){++++}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:320 [inline] #0: 0000000044ea6650 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:366 [inline] #0: 0000000044ea6650 (&tty->ldisc_sem){++++}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #0: 0000000044ea6650 (&tty->ldisc_sem){++++}, at: tty_ldisc_release+0x2a8/0x440 drivers/tty/tty_ldisc.c:805 #1: 00000000c6e6c12a (&tty->ldisc_sem/1){+.+.}, at: __tty_ldisc_lock_nested drivers/tty/tty_ldisc.c:326 [inline] #1: 00000000c6e6c12a (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:368 [inline] #1: 00000000c6e6c12a (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:397 [inline] #1: 00000000c6e6c12a (&tty->ldisc_sem/1){+.+.}, at: tty_ldisc_release+0x398/0x440 drivers/tty/tty_ldisc.c:805 #2: 000000007af3b7c2 (rtnl_mutex){+.+.}, at: unregister_netdev+0xe/0x20 net/core/dev.c:9345 3 locks held by syz-executor.3/26721: SQUASHFS error: lzo decompression failed, data probably corrupt ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 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 SQUASHFS error: squashfs_read_data failed to read block 0x60 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: 26721 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] RIP: 0010:rcu_is_watching+0x3a/0xc0 kernel/rcu/tree.c:1025 Code: 25 02 48 c7 c3 c0 2a 02 00 48 ba 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 00 af cf 89 48 89 f9 48 c1 e9 03 80 3c 11 00 75 6d <48> 03 1c c5 00 af cf 89 be 04 00 00 00 48 8d 6b 10 48 89 ef e8 5d RSP: 0018:ffff8880ba007ad0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000022ac0 RCX: 1ffffffff139f5e0 RDX: dffffc0000000000 RSI: ffffffff83771e31 RDI: ffffffff89cfaf00 RBP: ffff888041bae100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66501b R12: ffff8880a1878d98 R13: ffff8880a1878d98 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f8288eb7700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd27fc9000 CR3: 0000000092d04000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_hrtimer_start include/trace/events/timer.h:191 [inline] debug_activate kernel/time/hrtimer.c:466 [inline] enqueue_hrtimer+0x322/0x3d0 kernel/time/hrtimer.c:972 __run_hrtimer kernel/time/hrtimer.c:1480 [inline] __hrtimer_run_queues+0xae6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:expire_timers+0x246/0x4e0 kernel/time/timer.c:1376 Code: fe e8 ee f5 0e 00 45 85 ff 0f 85 54 fe ff ff e8 70 f4 0e 00 4c 89 ef e8 48 c0 c5 06 48 89 ef 4c 89 e6 e8 bd f6 ff ff 4c 89 ef b5 bc c5 06 e9 4f fe ff ff e8 4b f4 0e 00 65 44 8b 25 03 f0 ad RSP: 0018:ffff8880ba007df0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff815389c4 RDX: 0000000000000100 RSI: ffffffff81538a20 RDI: ffff8880ba022b40 RBP: ffffffff8a52c2c0 R08: 0000000000000000 R09: 0000000000000101 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff83c46e50 R13: ffff8880ba022b40 R14: ffff8880ba007e78 R15: 0000000000000000 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1724 [inline] RIP: 0010:vprintk_emit+0x668/0x740 kernel/printk/printk.c:1964 Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 0f 85 d9 00 00 00 48 83 3d 9c a2 a3 08 00 74 37 e8 7d a5 14 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 82 fe ff ff e8 69 a5 14 00 0f 0b e8 62 a5 14 00 RSP: 0018:ffff88804e046b68 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000216 RCX: ffffc90007ce6000 RDX: 0000000000040000 RSI: ffffffff814ddff3 RDI: 0000000000000216 RBP: ffff88804e046ba8 R08: ffffffff8cd52d48 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000003c R13: 1ffffffff13e3051 R14: 0000000000000200 R15: 0000000000000001 vprintk_func+0x79/0x180 kernel/printk/printk_safe.c:405 printk+0xba/0xed kernel/printk/printk.c:2040 squashfs_read_data+0xfb8/0x13a0 fs/squashfs/block.c:213 squashfs_cache_get+0x4a7/0xd50 fs/squashfs/cache.c:123 squashfs_readpage_fragment fs/squashfs/file.c:437 [inline] squashfs_readpage+0x37a/0x2100 fs/squashfs/file.c:491 read_pages.isra.0+0x329/0x5d0 mm/readahead.c:133 __do_page_cache_readahead+0x5c6/0x6c0 mm/readahead.c:211 ra_submit mm/internal.h:66 [inline] ondemand_readahead.isra.0+0x575/0xd40 mm/readahead.c:493 page_cache_sync_readahead mm/readahead.c:528 [inline] page_cache_sync_readahead+0x275/0x520 mm/readahead.c:510 generic_file_buffered_read mm/filemap.c:2115 [inline] generic_file_read_iter+0x1497/0x2b60 mm/filemap.c:2385 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 integrity_kernel_read+0x147/0x1f0 security/integrity/iint.c:200 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:364 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:393 [inline] ima_calc_file_hash+0x4b2/0x8a0 security/integrity/ima/ima_crypto.c:450 ima_collect_measurement+0x4c4/0x570 security/integrity/ima/ima_api.c:231 process_measurement+0xddd/0x1440 security/integrity/ima/ima_main.c:284 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f828a542279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8288eb7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f828a654f80 RCX: 00007f828a542279 RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000007 RBP: 00007f828a59c189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff4d81356f R14: 00007f8288eb7300 R15: 0000000000022000