nla_parse: 8 callbacks suppressed netlink: 6 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor0'. INFO: task syz-executor5:22951 blocked for more than 140 seconds. Not tainted 4.18.0-rc6+ #71 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23288 22951 4448 0x20020004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write_nested+0xae/0x130 kernel/locking/rwsem.c:194 inode_lock_nested include/linux/fs.h:750 [inline] filename_create+0x1b2/0x5b0 fs/namei.c:3645 user_path_create fs/namei.c:3703 [inline] do_mknodat+0x1c6/0x510 fs/namei.c:3765 __do_sys_mknod fs/namei.c:3805 [inline] __se_sys_mknod fs/namei.c:3803 [inline] __ia32_sys_mknod+0x79/0xb0 fs/namei.c:3803 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fc3cb9 Code: Bad RIP value. RSP: 002b:00000000f5fbf0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000e RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor5:22957 blocked for more than 140 seconds. Not tainted 4.18.0-rc6+ #71 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D22840 22957 4448 0x20020004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 request_wait_answer+0x4c8/0x920 fs/fuse/dev.c:463 __fuse_request_send+0x12a/0x1d0 fs/fuse/dev.c:483 fuse_request_send+0x62/0xa0 fs/fuse/dev.c:496 fuse_simple_request+0x33d/0x730 fs/fuse/dev.c:554 fuse_lookup_name+0x3ee/0x830 fs/fuse/dir.c:323 fuse_lookup+0xf9/0x4c0 fs/fuse/dir.c:360 fuse_atomic_open+0x214/0x350 fs/fuse/dir.c:499 atomic_open fs/namei.c:3054 [inline] lookup_open+0xdb1/0x1b40 fs/namei.c:3190 do_last fs/namei.c:3311 [inline] path_openat+0x207d/0x4e10 fs/namei.c:3540 do_filp_open+0x255/0x380 fs/namei.c:3574 do_open_execat+0x1fe/0x670 fs/exec.c:853 __do_execve_file.isra.36+0x177f/0x25e0 fs/exec.c:1754 do_execveat_common fs/exec.c:1865 [inline] compat_do_execve fs/exec.c:1909 [inline] __do_compat_sys_execve fs/exec.c:1984 [inline] __se_compat_sys_execve fs/exec.c:1980 [inline] __ia32_compat_sys_execve+0x94/0xc0 fs/exec.c:1980 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fc3cb9 Code: Bad RIP value. RSP: 002b:00000000f5f9e0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 0000000020000040 RCX: 00000000200004c0 RDX: 0000000020000700 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/772: #0: 00000000a6963b1c (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461 1 lock held by rsyslogd/4305: 2 locks held by getty/4395: #0: 00000000bfe3bfde (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000dff6557c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4396: #0: 000000009922d4cb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000d040355e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4397: #0: 00000000a47b3dc4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000d195ccfb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4398: #0: 00000000f1057406 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000008d22815a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4399: #0: 000000003dc37b8e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000006954dcc1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4400: #0: 000000006d9bf841 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000a708a17b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4401: #0: 00000000c2efb37d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000f1572656 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by syz-executor5/22951: #0: 00000000a04e8993 (&type->i_mutex_dir_key#5/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #0: 00000000a04e8993 (&type->i_mutex_dir_key#5/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 3 locks held by syz-executor5/22957: #0: 000000009786749c (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 fs/exec.c:1403 #1: 00000000a04e8993 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:725 [inline] #1: 00000000a04e8993 (&type->i_mutex_dir_key#6){++++}, at: do_last fs/namei.c:3310 [inline] #1: 00000000a04e8993 (&type->i_mutex_dir_key#6){++++}, at: path_openat+0x204c/0x4e10 fs/namei.c:3540 #2: 000000006e6bd9b1 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:363 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 772 Comm: khungtaskd Not tainted 4.18.0-rc6+ #71 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 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:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x9c4/0xf80 kernel/hung_task.c:252 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4303 Comm: rs:main Q:Reg Not tainted 4.18.0-rc6+ #71 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:trace_ext4_da_reserve_space include/trace/events/ext4.h:1179 [inline] RIP: 0010:ext4_da_reserve_space fs/ext4/inode.c:1592 [inline] RIP: 0010:ext4_da_map_blocks fs/ext4/inode.c:1873 [inline] RIP: 0010:ext4_da_get_block_prep+0x1563/0x1b70 fs/ext4/inode.c:1946 Code: 6c 24 c0 48 c7 c7 c8 d3 85 88 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 8f 05 00 00 4c 89 ea 4c 8b 35 75 86 7a 06 48 b8 00 00 00 00 RSP: 0018:ffff8801b0ff6fd8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8801cc24e0a8 RCX: ffffffff820b438d RDX: 1ffffffff110ba79 RSI: ffffffff820b4d10 RDI: ffffffff8885d3c8 RBP: ffff8801b0ff7190 R08: ffff8801aff82480 R09: ffffed00399c70b2 R10: ffffed00399c70b2 R11: ffff8801cce38597 R12: ffff8801b0ff7168 R13: ffff8801b0ff7128 R14: ffff8801cce38500 R15: ffffffffffff0000 FS: 00007f3c3d9d0700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6b0fdd140 CR3: 00000001afde5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_block_write_begin+0x5e2/0x1580 fs/ext4/inode.c:1193 ext4_da_write_begin+0x410/0x1280 fs/ext4/inode.c:3078 generic_perform_write+0x3ae/0x6c0 mm/filemap.c:3139 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3264 ext4_file_write_iter+0x390/0x1430 fs/ext4/file.c:266 call_write_iter include/linux/fs.h:1793 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6c6/0x9f0 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3c3f42e19d Code: d1 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be fa ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 07 fb ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3c3d9cef90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000400 RCX: 00007f3c3f42e19d RDX: 0000000000000400 RSI: 00000000010ad340 RDI: 0000000000000006 RBP: 00000000010ad340 R08: 0000000001100860 R09: 00007f3c3edac3f0 R10: 30203033206c754a R11: 0000000000000293 R12: 0000000000000000 R13: 00007f3c3d9cf410 R14: 0000000001100860 R15: 00000000010ad140