INFO: task syz-executor3:4568 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D18664 4568 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x84a/0x11f0 fs/ext4/namei.c:3046 vfs_unlink+0x2db/0x510 fs/namei.c:4010 do_unlinkat+0x6cc/0xa30 fs/namei.c:4073 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455807 Code: d0 75 6c 48 8b 9c 24 10 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 18 e8 20 67 00 00 0f b6 44 24 20 84 c0 <74> 43 48 8b 84 24 80 00 00 00 48 8b 8c 24 e0 00 00 00 48 8b 4c c1 RSP: 002b:00007ffcc55f7028 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455807 RDX: 00007ffcc55f7030 RSI: 00007ffcc55f70c0 RDI: 00007ffcc55f70c0 RBP: 00007ffcc55f8dd0 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000206 R12: 00000000014e1940 R13: 0000000000000000 R14: 00007ffcc55f87a0 R15: 0000000000702140 INFO: task syz-executor7:4569 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D18664 4569 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x84a/0x11f0 fs/ext4/namei.c:3046 vfs_unlink+0x2db/0x510 fs/namei.c:4010 do_unlinkat+0x6cc/0xa30 fs/namei.c:4073 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455807 Code: d0 75 6c 48 8b 9c 24 10 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 18 e8 20 67 00 00 0f b6 44 24 20 84 c0 <74> 43 48 8b 84 24 80 00 00 00 48 8b 8c 24 e0 00 00 00 48 8b 4c c1 RSP: 002b:00007ffdad1b1098 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455807 RDX: 00007ffdad1b10a0 RSI: 00007ffdad1b1130 RDI: 00007ffdad1b1130 RBP: 00007ffdad1b2e40 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 00000000020f0940 R13: 0000000000000000 R14: 00007ffdad1b2810 R15: 0000000000702140 INFO: task syz-executor6:4572 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D20200 4572 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_evict_inode+0xc54/0x1ac0 fs/ext4/inode.c:334 evict+0x4ae/0x990 fs/inode.c:558 iput_final fs/inode.c:1506 [inline] iput+0x635/0xaa0 fs/inode.c:1532 do_unlinkat+0x733/0xa30 fs/namei.c:4079 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455807 Code: d0 75 6c 48 8b 9c 24 10 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 18 e8 20 67 00 00 0f b6 44 24 20 84 c0 <74> 43 48 8b 84 24 80 00 00 00 48 8b 8c 24 e0 00 00 00 48 8b 4c c1 RSP: 002b:00007ffecf9466c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455807 RDX: 00007ffecf9466d0 RSI: 00007ffecf946760 RDI: 00007ffecf946760 RBP: 00007ffecf948470 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000202 R12: 00000000024d9940 R13: 0000000000000000 R14: 00007ffecf947e40 R15: 0000000000702140 INFO: task syz-executor2:7983 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D21232 7983 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_evict_inode+0xc54/0x1ac0 fs/ext4/inode.c:334 evict+0x4ae/0x990 fs/inode.c:558 iput_final fs/inode.c:1506 [inline] iput+0x635/0xaa0 fs/inode.c:1532 do_unlinkat+0x733/0xa30 fs/namei.c:4079 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455807 Code: d0 75 6c 48 8b 9c 24 10 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 18 e8 20 67 00 00 0f b6 44 24 20 84 c0 <74> 43 48 8b 84 24 80 00 00 00 48 8b 8c 24 e0 00 00 00 48 8b 4c c1 RSP: 002b:00007fff9b3adcf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455807 RDX: 00007fff9b3add00 RSI: 00007fff9b3add90 RDI: 00007fff9b3add90 RBP: 00007fff9b3afaa0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 00000000020c4940 R13: 0000000000000000 R14: 00007fff9b3af470 R15: 0000000000702140 INFO: task syz-executor1:8947 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D18664 8947 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x84a/0x11f0 fs/ext4/namei.c:3046 vfs_unlink+0x2db/0x510 fs/namei.c:4010 do_unlinkat+0x6cc/0xa30 fs/namei.c:4073 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455807 Code: d0 75 6c 48 8b 9c 24 10 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 18 e8 20 67 00 00 0f b6 44 24 20 84 c0 <74> 43 48 8b 84 24 80 00 00 00 48 8b 8c 24 e0 00 00 00 48 8b 4c c1 RSP: 002b:00007fffdae5b9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455807 RDX: 00007fffdae5b9c0 RSI: 00007fffdae5ba50 RDI: 00007fffdae5ba50 RBP: 00007fffdae5d760 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 00000000012ae940 R13: 0000000000000000 R14: 00007fffdae5d130 R15: 0000000000702140 INFO: task syz-executor5:16717 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23544 16717 4570 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_create+0x473/0x640 fs/ext4/namei.c:2458 lookup_open+0x13eb/0x1b40 fs/namei.c:3220 do_last fs/namei.c:3311 [inline] path_openat+0x1343/0x4e10 fs/namei.c:3540 do_filp_open+0x255/0x380 fs/namei.c:3574 do_sys_open+0x584/0x760 fs/open.c:1101 ksys_open include/linux/syscalls.h:1274 [inline] __do_sys_creat fs/open.c:1159 [inline] __se_sys_creat fs/open.c:1157 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1157 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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 92 9a 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:00007f032c221c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f032c2226d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000200000c0 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bb9a6 R14: 00000000004c8f68 R15: 0000000000000000 INFO: task syz-executor5:16735 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D22984 16735 4570 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1777 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_xattr_set+0x25c/0x420 fs/ext4/xattr.c:2504 ext4_xattr_user_set+0xbe/0x100 fs/ext4/xattr_user.c:40 __vfs_setxattr+0x124/0x190 fs/xattr.c:150 __vfs_setxattr_noperm+0x11d/0x410 fs/xattr.c:181 vfs_setxattr+0xd8/0x100 fs/xattr.c:224 setxattr+0x2ea/0x450 fs/xattr.c:451 path_setxattr+0x1e3/0x230 fs/xattr.c:470 __do_sys_lsetxattr fs/xattr.c:492 [inline] __se_sys_lsetxattr fs/xattr.c:488 [inline] __x64_sys_lsetxattr+0xc1/0x150 fs/xattr.c:488 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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 92 9a 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:00007f032c200c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f032c2016d4 RCX: 0000000000455ab9 RDX: 00000000200003c0 RSI: 0000000020000000 RDI: 0000000020000200 RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000053 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c00f0 R14: 00000000004cfbe0 R15: 0000000000000001 INFO: task syz-executor4:16719 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #145 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D23496 16719 4571 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __synchronize_srcu+0x189/0x240 kernel/rcu/srcutree.c:928 synchronize_srcu_expedited+0x18/0x20 kernel/rcu/srcutree.c:953 install_new_memslots+0x20a/0x4b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:879 __kvm_set_memory_region+0x1be6/0x2e60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1054 kvm_set_memory_region+0x2e/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1077 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1089 [inline] kvm_vm_ioctl+0x664/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2977 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455927 Code: 01 00 00 c3 48 85 c9 74 05 48 85 c0 75 18 c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 48 89 84 24 00 00 00 8b 01 89 44 24 08 48 8b 84 24 48 01 00 00 48 89 04 24 RSP: 002b:00007f6b7cbe1098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000018 RCX: 0000000000455927 RDX: 00007f6b7cbe1530 RSI: 000000004020ae46 RDI: 0000000000000017 RBP: 0000000020017000 R08: 0aaaaaaaaaaaa84c R09: 0000000000000000 R10: 0000000000000017 R11: 0000000000000246 R12: 00000000fec00000 R13: 0000000000000017 R14: 00000000004d3c18 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/901: #0: 000000002fafd708 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461 1 lock held by rsyslogd/4430: 2 locks held by getty/4520: #0: 00000000e25d4f97 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000003beb44f5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4521: #0: 000000006e625a2c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000008ed1f890 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4522: #0: 00000000206e9c46 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000d9d266e6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4523: #0: 00000000400d0a7a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000000697f5d2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4524: #0: 0000000003f946fb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000006461ca95 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4525: #0: 00000000bf0131ae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000033d6b50c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4526: #0: 000000008fc59ce6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000c0bbdb0c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 3 locks held by syz-executor3/4568: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000b1643626 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 00000000b1643626 (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4059 #2: 000000006f1ae7d1 (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #2: 000000006f1ae7d1 (&sb->s_type->i_mutex_key#12){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:4001 3 locks held by syz-executor7/4569: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000e74f2062 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 00000000e74f2062 (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4059 #2: 00000000e5b35ebb (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #2: 00000000e5b35ebb (&sb->s_type->i_mutex_key#12){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:4001 2 locks held by syz-executor6/4572: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000e1300b6a (sb_internal){.+.+}, at: sb_start_intwrite include/linux/fs.h:1601 [inline] #1: 00000000e1300b6a (sb_internal){.+.+}, at: ext4_evict_inode+0x73d/0x1ac0 fs/ext4/inode.c:250 2 locks held by syz-executor2/7983: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000e1300b6a (sb_internal){.+.+}, at: sb_start_intwrite include/linux/fs.h:1601 [inline] #1: 00000000e1300b6a (sb_internal){.+.+}, at: ext4_evict_inode+0x73d/0x1ac0 fs/ext4/inode.c:250 3 locks held by syz-executor1/8947: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000aed69f83 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 00000000aed69f83 (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4059 #2: 00000000fe2fe083 (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #2: 00000000fe2fe083 (&sb->s_type->i_mutex_key#12){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:4001 3 locks held by syz-executor0/12603: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000080200205 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 0000000080200205 (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4059 #2: 000000003458ac72 (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #2: 000000003458ac72 (&sb->s_type->i_mutex_key#12){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:4001 2 locks held by syz-executor5/16717: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 000000008dcf6afc (&type->i_mutex_dir_key){++++}, at: inode_lock include/linux/fs.h:715 [inline] #1: 000000008dcf6afc (&type->i_mutex_dir_key){++++}, at: do_last fs/namei.c:3308 [inline] #1: 000000008dcf6afc (&type->i_mutex_dir_key){++++}, at: path_openat+0x1316/0x4e10 fs/namei.c:3540 2 locks held by syz-executor5/16735: #0: 00000000086751fc (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000086751fc (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000647306ad (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #1: 00000000647306ad (&sb->s_type->i_mutex_key#12){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219 1 lock held by syz-executor4/16719: #0: 00000000c8a9113a (&kvm->slots_lock){+.+.}, at: kvm_set_memory_region+0x23/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1076 1 lock held by syz-executor4/16721: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc4+ #145 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: 16721 Comm: syz-executor4 Not tainted 4.18.0-rc4+ #145 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vmx_complete_atomic_exit arch/x86/kvm/vmx.c:9723 [inline] RIP: 0010:vmx_vcpu_run+0x1c7a/0x2600 arch/x86/kvm/vmx.c:10219 Code: bf 00 02 00 80 e8 36 bc 5c 00 41 81 ff 00 02 00 80 0f 85 93 01 00 00 e8 14 bb 5c 00 48 8b 04 24 65 48 89 05 38 80 e2 7e cd 02 <48> b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 65 48 c7 05 19 RSP: 0018:ffff88019e5ef370 EFLAGS: 00000046 RAX: ffff8801d2f70480 RBX: ffff8801d2f75b10 RCX: ffffc90004e24000 RDX: 0000000000040000 RSI: ffffffff811f508c RDI: 0000000000000005 RBP: ffff88019e5ef840 R08: ffff88019b5d63c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000080000202 R13: 0000000000000000 R14: 0000000080000202 R15: 0000000080000200 FS: 00007f6b7cba1700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001d800c000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vcpu_run arch/x86/kvm/x86.c:7585 [inline] kvm_arch_vcpu_ioctl_run+0x33e/0x1690 arch/x86/kvm/x86.c:7762 kvm_vcpu_ioctl+0x7b8/0x1300 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ab9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6b7cba0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6b7cba16d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000015 RBP: 000000000072bff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bdc94 R14: 00000000004cc6d0 R15: 0000000000000002