[14171] 0 14171 17618 12650 31 3 0 1000 syz-executor0 [14173] 0 14173 17618 8216 24 4 0 1000 syz-executor4 [14174] 0 14174 635 10 6 3 0 0 modprobe Out of memory: Kill process 14157 (syz-executor2) score 1008 or sacrifice child Killed process 14157 (syz-executor2) total-vm:70472kB, anon-rss:17816kB, file-rss:42696kB, shmem-rss:0kB INFO: task init:12026 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29112 12026 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721 __down_common kernel/locking/semaphore.c:221 [inline] __down+0x180/0x2a0 kernel/locking/semaphore.c:238 down+0x58/0x70 kernel/locking/semaphore.c:62 console_lock+0x24/0x70 kernel/printk/printk.c:2056 console_device+0x17/0xb0 kernel/printk/printk.c:2343 tty_lookup_driver+0x17a/0x210 drivers/tty/tty_io.c:1833 tty_open_by_driver drivers/tty/tty_io.c:1928 [inline] tty_open+0x3b9/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000d9ff40 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000d9ff48 INFO: task init:12027 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 12027 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000da0010 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000da0018 INFO: task init:12028 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29040 12028 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000da00e0 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000da00e8 INFO: task init:12029 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 12029 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000da01b0 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000da01b8 INFO: task init:12030 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 12030 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000da0280 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000da0288 INFO: task init:12031 blocked for more than 140 seconds. Not tainted 4.14.80+ #5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 12031 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3408 [inline] path_openat+0x4eb/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f7d09391120 RSP: 002b:00007fffbc10c588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000da0350 RCX: 00007f7d09391120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fffbc10c700 R15: 0000000000da0358 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1627: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1755: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142 2 locks held by kworker/u4:6/3919: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 1 lock held by init/12026: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/12027: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/12028: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/12029: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/12030: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/12031: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by syz-executor0/14159: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 1 lock held by syz-executor1/14160: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 2 locks held by syz-executor1/14166: #0: (&dup_mmap_sem){.+.+}, at: [] dup_mmap kernel/fork.c:609 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] dup_mm kernel/fork.c:1202 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] copy_mm kernel/fork.c:1256 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] copy_process.part.6+0x3989/0x6530 kernel/fork.c:1762 #1: (&mm->mmap_sem){++++}, at: [] dup_mmap kernel/fork.c:610 [inline] #1: (&mm->mmap_sem){++++}, at: [] dup_mm kernel/fork.c:1202 [inline] #1: (&mm->mmap_sem){++++}, at: [] copy_mm kernel/fork.c:1256 [inline] #1: (&mm->mmap_sem){++++}, at: [] copy_process.part.6+0x39a5/0x6530 kernel/fork.c:1762 1 lock held by syz-executor3/14167: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 1 lock held by syz-executor5/14170: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 1 lock held by syz-executor4/14173: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 1 lock held by syz-executor4/14175: #0: (&mm->mmap_sem){++++}, at: [] __mm_populate+0x206/0x300 mm/gup.c:1247 1 lock held by modprobe/14174: #0: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6177 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.80+ #5 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 190 Comm: udevd Not tainted 4.14.80+ #5 task: ffff8801d47f5e00 task.stack: ffff8801d40c8000 RIP: 0010:inb arch/x86/include/asm/io.h:309 [inline] RIP: 0010:io_serial_in+0x60/0x80 drivers/tty/serial/8250/8250_port.c:450 RSP: 0018:ffff8801d40cf510 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff9c121b18 RBP: ffffffff9c121ae0 R08: 0000000000000eee R09: ffffffff9b2cde50 R10: ffff8801d47f66a8 R11: 0000000000000001 R12: 0000000000000020 R13: fffffbfff38243a2 R14: fffffbfff3824365 R15: ffffffff9c121d12 FS: 00007fd9d4bd57a0(0000) GS:ffff8801db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000235f914 CR3: 00000001d5654005 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_in drivers/tty/serial/8250/8250.h:115 [inline] wait_for_xmitr+0x90/0x1e0 drivers/tty/serial/8250/8250_port.c:2032 serial8250_console_putchar+0x19/0x50 drivers/tty/serial/8250/8250_port.c:3184 uart_console_write+0x4b/0xd0 drivers/tty/serial/serial_core.c:1883 serial8250_console_write+0x51b/0x800 drivers/tty/serial/8250/8250_port.c:3250 call_console_drivers kernel/printk/printk.c:1574 [inline] console_unlock+0x5b9/0xb50 kernel/printk/printk.c:2242 vprintk_emit+0x112/0x150 kernel/printk/printk.c:1766 vprintk_func+0x58/0x159 kernel/printk/printk_safe.c:401 printk+0xa7/0xcf kernel/printk/printk.c:1838 warn_alloc.cold.35+0x153/0x1b7 mm/page_alloc.c:3256 __alloc_pages_slowpath mm/page_alloc.c:4011 [inline] __alloc_pages_nodemask+0x1439/0x2300 mm/page_alloc.c:4222 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] page_cache_read mm/filemap.c:2286 [inline] filemap_fault+0xcdd/0x14a0 mm/filemap.c:2470 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6178 __do_fault+0x80/0x210 mm/memory.c:3194 do_read_fault mm/memory.c:3604 [inline] do_fault mm/memory.c:3704 [inline] handle_pte_fault mm/memory.c:3934 [inline] __handle_mm_fault+0xe04/0x23a0 mm/memory.c:4058 handle_mm_fault+0x2f2/0x6eb mm/memory.c:4095 __do_page_fault+0x45d/0xb60 arch/x86/mm/fault.c:1425 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1104 RIP: 0000:0xa41d40 RSP: a41030:00000000000003fc EFLAGS: 00000003 Code: 30 0f b6 8d d1 00 00 00 48 8d 7d 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 13 03 5d 38 89 da ec <0f> b6 c0 5b 5d c3 e8 a5 68 7c ff eb c9 e8 ce 68 7c ff eb e6 66