INFO: task syz-executor6:14929 blocked for more than 140 seconds. Not tainted 4.18.0-rc5+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D58576 14929 20617 0x00000004 Call Trace: context_switch kernel/sched/core.c:2857 [inline] __schedule+0x652/0x780 kernel/sched/core.c:3507 schedule+0x1cc/0x300 kernel/sched/core.c:3551 __rwsem_down_write_failed_common+0x807/0x1480 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0x2c/0x30 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+0x5e/0xc0 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:715 [inline] fuse_reverse_inval_entry+0x154/0xad0 fs/fuse/dir.c:969 fuse_notify_inval_entry fs/fuse/dev.c:1491 [inline] fuse_notify fs/fuse/dev.c:1764 [inline] fuse_dev_do_write+0xcacf/0xcea0 fs/fuse/dev.c:1848 fuse_dev_write+0x1d0/0x250 fs/fuse/dev.c:1928 call_write_iter include/linux/fs.h:1793 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x87e/0xb90 fs/read_write.c:487 vfs_write+0x467/0x8c0 fs/read_write.c:549 ksys_write fs/read_write.c:598 [inline] __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x1cf/0x400 fs/read_write.c:607 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x455ab9 Code: e0 1f 48 89 04 24 e8 b6 6f fd ff e8 81 6a fd ff e8 5c 68 fd ff 48 8d 05 23 cd 48 00 48 89 04 24 48 c7 44 24 08 1d 00 00 00 e8 <13> 5e fd ff 0f 0b e8 8c 44 00 00 e9 07 f0 ff ff cc cc cc cc cc cc RSP: 002b:00007f27b01e2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f27b01e36d4 RCX: 0000000000455ab9 RDX: 0000000000000029 RSI: 00000000200000c0 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c284d R14: 00000000004d45d8 R15: 0000000000000000 INFO: task syz-executor6:14969 blocked for more than 140 seconds. Not tainted 4.18.0-rc5+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D61640 14969 20617 0x00000004 Call Trace: context_switch kernel/sched/core.c:2857 [inline] __schedule+0x652/0x780 kernel/sched/core.c:3507 schedule+0x1cc/0x300 kernel/sched/core.c:3551 request_wait_answer fs/fuse/dev.c:463 [inline] __fuse_request_send+0x105a/0x1a90 fs/fuse/dev.c:483 fuse_request_send fs/fuse/dev.c:496 [inline] fuse_simple_request+0x9cc/0xc10 fs/fuse/dev.c:554 fuse_lookup_name+0x472/0xc80 fs/fuse/dir.c:323 fuse_lookup+0x193/0x810 fs/fuse/dir.c:360 __lookup_hash+0x26c/0x510 fs/namei.c:1505 filename_create+0x322/0xbe0 fs/namei.c:3646 user_path_create fs/namei.c:3703 [inline] do_mkdirat+0x120/0x690 fs/namei.c:3842 __do_sys_mkdirat fs/namei.c:3861 [inline] __se_sys_mkdirat fs/namei.c:3859 [inline] __x64_sys_mkdirat+0xe1/0x120 fs/namei.c:3859 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x455ab9 Code: e0 1f 48 89 04 24 e8 b6 6f fd ff e8 81 6a fd ff e8 5c 68 fd ff 48 8d 05 23 cd 48 00 48 89 04 24 48 c7 44 24 08 1d 00 00 00 e8 <13> 5e fd ff 0f 0b e8 8c 44 00 00 e9 07 f0 ff ff cc cc cc cc cc cc RSP: 002b:00007f27b01c1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f27b01c26d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000020000500 RDI: ffffffffffffff9c RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c013c R14: 00000000004cfcb8 R15: 0000000000000001 INFO: task syz-executor6:14981 blocked for more than 140 seconds. Not tainted 4.18.0-rc5+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D59344 14981 20617 0x00000004 Call Trace: context_switch kernel/sched/core.c:2857 [inline] __schedule+0x652/0x780 kernel/sched/core.c:3507 schedule+0x1cc/0x300 kernel/sched/core.c:3551 __rwsem_down_write_failed_common+0x807/0x1480 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0x2c/0x30 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+0x5e/0xc0 kernel/locking/rwsem.c:72 inode_lock_nested include/linux/fs.h:750 [inline] filename_create+0x2c4/0xbe0 fs/namei.c:3645 user_path_create fs/namei.c:3703 [inline] do_mkdirat+0x120/0x690 fs/namei.c:3842 __do_sys_mkdirat fs/namei.c:3861 [inline] __se_sys_mkdirat fs/namei.c:3859 [inline] __x64_sys_mkdirat+0xe1/0x120 fs/namei.c:3859 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x455ab9 Code: e0 1f 48 89 04 24 e8 b6 6f fd ff e8 81 6a fd ff e8 5c 68 fd ff 48 8d 05 23 cd 48 00 48 89 04 24 48 c7 44 24 08 1d 00 00 00 e8 <13> 5e fd ff 0f 0b e8 8c 44 00 00 e9 07 f0 ff ff cc cc cc cc cc cc RSP: 002b:00007f27b017fc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f27b01806d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000020000500 RDI: ffffffffffffff9c RBP: 000000000072c098 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c013c R14: 00000000004cfcb8 R15: 0000000000000003 NMI backtrace for cpu 0 CPU: 0 PID: 807 Comm: khungtaskd Not tainted 4.18.0-rc5+ #29 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+0x185/0x1e0 lib/dump_stack.c:113 nmi_cpu_backtrace lib/nmi_backtrace.c:103 [inline] nmi_trigger_cpumask_backtrace+0x26f/0x4e0 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x2c/0x40 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace+0x2b/0x30 include/linux/nmi.h:138 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x1107/0x1130 kernel/hung_task.c:252 kthread+0x473/0x4b0 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: ------------[ cut here ]------------ kernel BUG at mm/kmsan/kmsan_entry.c:81! invalid opcode: 0000 [#1] SMP PTI CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.18.0-rc5+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80 Code: 00 74 27 65 8b 04 25 80 90 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 80 90 03 00 65 c6 04 25 15 6e 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e RSP: 0018:fffffe0000049ea8 EFLAGS: 00010046 RAX: 0000000080000000 RBX: 0000000000000001 RCX: 00000000c0000101 RDX: 00000000ffff8802 RSI: ffffffff8a40136c RDI: ffffea0000439620 RBP: fffffe0000049ef9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 000000018f834000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000018f834000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 93a478004a4f6409 ]--- RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80 Code: 00 74 27 65 8b 04 25 80 90 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 80 90 03 00 65 c6 04 25 15 6e 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e RSP: 0018:fffffe0000049ea8 EFLAGS: 00010046 RAX: 0000000080000000 RBX: 0000000000000001 RCX: 00000000c0000101 RDX: 00000000ffff8802 RSI: ffffffff8a40136c RDI: ffffea0000439620 RBP: fffffe0000049ef9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 000000018f834000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000018f834000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600