INFO: task hung in vt

Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.19	INFO: task hung in vt_resize	1	1743d	1743d	0/1	auto-closed as invalid on 2020/08/19 20:33
upstream	INFO: task hung in vt_resize serial	1	1796d	1793d	0/28	auto-closed as invalid on 2020/06/27 10:07
linux-4.14	INFO: task hung in vt_resize	1	1856d	1856d	0/1	auto-closed as invalid on 2020/04/28 10:00
linux-4.14	INFO: task hung in vt_resize (2)	1	1704d	1704d	0/1	auto-closed as invalid on 2020/09/27 00:31

INFO: task syz-executor.5:24829 blocked for more than 143 seconds. Not tainted 5.8.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28744 24829 7288 0x00000004 Call Trace: context_switch kernel/sched/core.c:3453 [inline] __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178 schedule+0xd0/0x2a0 kernel/sched/core.c:4253 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1873 __down_common kernel/locking/semaphore.c:220 [inline] __down+0x183/0x2a0 kernel/locking/semaphore.c:237 down+0x57/0x80 kernel/locking/semaphore.c:61 console_lock+0x25/0x80 kernel/printk/printk.c:2309 vt_resize+0x41/0xe0 drivers/tty/vt/vt.c:1354 tiocswinsz drivers/tty/tty_io.c:2277 [inline] tty_ioctl+0x119a/0x15f0 drivers/tty/tty_io.c:2576 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:753 __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl fs/ioctl.c:760 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007ff1e4adfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004eff20 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 0000000000005414 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000005a3 R14: 00000000004c86d5 R15: 00007ff1e4ae06d4 Showing all locks held in the system: 1 lock held by khungtaskd/1142: #0: ffffffff89bc1140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by in:imklog/6508: #0: ffff888096fa73b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 1 lock held by syz-executor.5/24820: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1142 Comm: khungtaskd Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24820 Comm: syz-executor.5 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:62 [inline] RIP: 0010:bitfill_aligned+0xe6/0x200 drivers/video/fbdev/core/cfbfillrect.c:35 Code: fd e8 2e b5 b1 fd 31 ff 44 89 fe e8 a4 b1 b1 fd 45 85 ff 0f 85 f6 00 00 00 e8 16 b5 b1 fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 <41> 89 c4 89 c6 41 89 c7 e8 7d b1 b1 fd 41 83 fc 07 76 5f 4c 89 ed RSP: 0018:ffffc900016d7708 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffc9001419f000 RDX: 0000000000000000 RSI: ffffffff83c2020a RDI: 0000000000000007 RBP: 0000000000000040 R08: 00000000000000c0 R09: 0000000000000040 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000c0 R13: ffff8880000a0000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff1e4b01700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f49ff86eac0 CR3: 00000000a44a0000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfb_fillrect+0x40b/0x7b0 drivers/video/fbdev/core/cfbfillrect.c:327 vga16fb_fillrect+0x683/0x193b drivers/video/fbdev/vga16fb.c:951 bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins+0x1d5/0x230 drivers/video/fbdev/core/fbcon.c:1381 fbcon_switch+0xb6e/0x16c0 drivers/video/fbdev/core/fbcon.c:2363 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 vc_do_resize+0x110e/0x13f0 drivers/tty/vt/vt.c:1314 vt_resize+0xa3/0xe0 drivers/tty/vt/vt.c:1355 tiocswinsz drivers/tty/tty_io.c:2277 [inline] tty_ioctl+0x119a/0x15f0 drivers/tty/tty_io.c:2576 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:753 __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl fs/ioctl.c:760 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007ff1e4b00c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004eff20 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 0000000000005414 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000005a3 R14: 00000000004c86d5 R15: 00007ff1e4b016d4