protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 INFO: task syz-executor0:17419 blocked for more than 140 seconds. Not tainted 5.0.0-rc2+ #31 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25752 17419 8397 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 d_wait_lookup fs/dcache.c:2408 [inline] d_alloc_parallel+0x143c/0x1f10 fs/dcache.c:2490 lookup_open+0x57c/0x1b80 fs/namei.c:3147 do_last fs/namei.c:3324 [inline] path_openat+0x25fd/0x5650 fs/namei.c:3534 do_filp_open+0x26f/0x370 fs/namei.c:3564 do_sys_open+0x59a/0x7c0 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x9d/0x100 fs/open.c:1084 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f56dfe8ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458099 RDX: 0000000000000002 RSI: 0000000020000200 RDI: 0000000000000008 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f56dfe8f6d4 R13: 00000000004c407b R14: 00000000004d7288 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 000000007bcfb8fc (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/8238: #0: 00000000129e87f8 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 2 locks held by getty/8360: #0: 000000007f6c4bbf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000515865a6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8361: #0: 00000000ccccacd8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000cc396a98 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8362: #0: 0000000004d31996 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ed929920 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8363: #0: 00000000dcc7eb4f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000043536d17 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8364: #0: 00000000880dc896 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000bd319cac (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8365: #0: 0000000047b8ea00 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000026ac90f2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8366: #0: 00000000a3262a4b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000445560b5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 3 locks held by syz-executor0/17416: 2 locks held by syz-executor0/17419: #0: 00000000c85a751a (sb_writers#15){.+.+}, at: sb_start_write include/linux/fs.h:1602 [inline] #0: 00000000c85a751a (sb_writers#15){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:357 #1: 00000000aa8bded3 (&sb->s_type->i_mutex_key#22){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #1: 00000000aa8bded3 (&sb->s_type->i_mutex_key#22){++++}, at: do_last fs/namei.c:3323 [inline] #1: 00000000aa8bded3 (&sb->s_type->i_mutex_key#22){++++}, at: path_openat+0x25e1/0x5650 fs/namei.c:3534 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc2+ #31 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17414 Comm: syz-executor2 Not tainted 5.0.0-rc2+ #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:page_fault+0x0/0x30 arch/x86/entry/entry_64.S:1142 Code: 00 00 48 89 e7 48 8b 74 24 78 48 c7 44 24 78 ff ff ff ff e8 92 e1 2b f9 e9 1d 02 00 00 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <0f> 1f 00 e8 38 01 00 00 48 89 e7 48 8b 74 24 78 48 c7 44 24 78 ff RSP: 0018:ffff888050427aa0 EFLAGS: 00000002 RAX: 0000000000000008 RBX: 0000000000000040 RCX: 0000000000000008 RDX: 0000000000000000 RSI: ffffffff81b4ec33 RDI: 000000000040ed80 RBP: ffff888050427ae8 R08: ffff88803265a200 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000040ed80 R13: 000000000040eb80 R14: ffff88803265a200 R15: 00007ffffffff000 FS: 00007efdf5cc7700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000040ed80 CR3: 000000005041a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_xregs_to_user arch/x86/include/asm/fpu/internal.h:375 [inline] copy_fpregs_to_sigframe arch/x86/kernel/fpu/signal.c:126 [inline] copy_fpstate_to_sigframe+0x28b/0x560 arch/x86/kernel/fpu/signal.c:177 get_sigframe.isra.0.constprop.0+0x51e/0xac0 arch/x86/kernel/signal.c:285 __setup_rt_frame arch/x86/kernel/signal.c:466 [inline] setup_rt_frame arch/x86/kernel/signal.c:706 [inline] handle_signal arch/x86/kernel/signal.c:750 [inline] do_signal+0xc4c/0x1ea0 arch/x86/kernel/signal.c:818 exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 7703: (null) Code: Bad RIP value. RSP: 0003:000000000040ef75 EFLAGS: 00040702 RAX: 0000000000000000 RBX: 00000000004047bc RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00007efdf5cc79c0 RDI: 00007ffc19cbcdcf RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000040363f R10: 0000000000000000 R11: 5ea64a42ef225900 R12: 0000000000000000 R13: 000000000073bfa8 R14: 000000000073bfa0 R15: 000000000073bfac