INFO: task syz-executor.4:4120 blocked for more than 143 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26472 pid: 4120 ppid: 3920 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 xfs_buf_iowait+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x631/0x1870 fs/xfs/xfs_super.c:1490 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007efc07c5c188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc569abeef R14: 00007efc07c5c300 R15: 0000000000022000 INFO: task syz-executor.4:4166 blocked for more than 143 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29640 pid: 4166 ppid: 3920 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 blk_mq_freeze_queue_wait+0xec/0x120 block/blk-mq.c:178 nbd_add_socket+0x152/0x7e0 drivers/block/nbd.c:1109 __nbd_ioctl drivers/block/nbd.c:1454 [inline] nbd_ioctl+0x3aa/0x8f0 drivers/block/nbd.c:1511 blkdev_ioctl+0x30b/0x6d0 block/ioctl.c:588 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007efc07c1a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffc569abeef R14: 00007efc07c1a300 R15: 0000000000022000 INFO: task syz-executor.4:4179 blocked for more than 143 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28856 pid: 4179 ppid: 3920 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 grab_super+0x50/0x1c0 fs/super.c:386 sget_fc+0x1e3/0x700 fs/super.c:561 get_tree_bdev+0x17d/0x680 fs/super.c:1262 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007efc07bf9188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffc569abeef R14: 00007efc07bf9300 R15: 0000000000022000 INFO: task syz-executor.1:4122 blocked for more than 144 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27040 pid: 4122 ppid: 3928 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 xfs_buf_iowait+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x631/0x1870 fs/xfs/xfs_super.c:1490 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f529ad27188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd73280c2f R14: 00007f529ad27300 R15: 0000000000022000 INFO: task syz-executor.1:4173 blocked for more than 144 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28856 pid: 4173 ppid: 3928 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 grab_super+0x50/0x1c0 fs/super.c:386 sget_fc+0x1e3/0x700 fs/super.c:561 get_tree_bdev+0x17d/0x680 fs/super.c:1262 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f529ace5188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffd73280c2f R14: 00007f529ace5300 R15: 0000000000022000 INFO: task syz-executor.5:4154 blocked for more than 144 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27600 pid: 4154 ppid: 3930 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 xfs_buf_iowait+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x631/0x1870 fs/xfs/xfs_super.c:1490 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f2d6cafd188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf677700f R14: 00007f2d6cafd300 R15: 0000000000022000 INFO: task syz-executor.5:4220 blocked for more than 145 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28408 pid: 4220 ppid: 3930 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 grab_super+0x50/0x1c0 fs/super.c:386 sget_fc+0x1e3/0x700 fs/super.c:561 get_tree_bdev+0x17d/0x680 fs/super.c:1262 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f2d6cabb188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffcf677700f R14: 00007f2d6cabb300 R15: 0000000000022000 INFO: task syz-executor.3:4151 blocked for more than 145 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26736 pid: 4151 ppid: 3925 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 xfs_buf_iowait+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x631/0x1870 fs/xfs/xfs_super.c:1490 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007fa0789ab188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffa5b7aa1f R14: 00007fa0789ab300 R15: 0000000000022000 INFO: task syz-executor.3:4217 blocked for more than 145 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29640 pid: 4217 ppid: 3925 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 blk_mq_freeze_queue_wait+0xec/0x120 block/blk-mq.c:178 nbd_add_socket+0x152/0x7e0 drivers/block/nbd.c:1109 __nbd_ioctl drivers/block/nbd.c:1454 [inline] nbd_ioctl+0x3aa/0x8f0 drivers/block/nbd.c:1511 blkdev_ioctl+0x30b/0x6d0 block/ioctl.c:588 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007fa078969188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007fffa5b7aa1f R14: 00007fa078969300 R15: 0000000000022000 INFO: task syz-executor.3:4224 blocked for more than 145 seconds. Not tainted 5.17.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28376 pid: 4224 ppid: 3925 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 grab_super+0x50/0x1c0 fs/super.c:386 sget_fc+0x1e3/0x700 fs/super.c:561 get_tree_bdev+0x17d/0x680 fs/super.c:1262 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007fa078948188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007fffa5b7aa1f R14: 00007fa078948300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8ab78520 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 2 locks held by getty/3309: #0: ffff88807ede9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900027662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2077 1 lock held by syz-executor.4/4120: #0: ffff88806e2760e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 1 lock held by syz-executor.4/4166: #0: ffff888019666198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1504 2 locks held by syz-executor.4/4179: #0: ffff88801007cb18 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff88806e2760e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 1 lock held by syz-executor.1/4122: #0: ffff88806e2d20e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 2 locks held by syz-executor.1/4173: #0: ffff88814084b418 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff88806e2d20e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 1 lock held by syz-executor.5/4154: #0: ffff888064b2c0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 2 locks held by syz-executor.5/4220: #0: ffff88801007d698 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff888064b2c0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 1 lock held by syz-executor.3/4151: #0: ffff88807b0000e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 1 lock held by syz-executor.3/4217: #0: ffff8880194be998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1504 2 locks held by syz-executor.3/4224: #0: ffff88801007bf98 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff88807b0000e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 1 lock held by syz-executor.0/4155: #0: ffff88807b45a0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 1 lock held by syz-executor.0/4225: #0: ffff888019539998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1504 2 locks held by syz-executor.0/4232: #0: ffff88814084a898 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff88807b45a0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 1 lock held by syz-executor.2/4159: #0: ffff888064bae0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 2 locks held by syz-executor.2/4230: #0: ffff88814084bf98 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1252 #1: ffff888064bae0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:386 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.17.0-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:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0x88c/0xbf0 kernel/hung_task.c:369 kthread+0x299/0x340 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 33 Comm: khugepaged Not tainted 5.17.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:match_held_lock+0xe/0xc0 kernel/locking/lockdep.c:5089 Code: 48 c7 c7 40 a7 cb 88 e8 3b 50 be ff e8 f2 29 ce ff 31 c0 5d c3 0f 1f 80 00 00 00 00 53 48 89 fb 48 83 ec 08 48 39 77 10 74 6a <66> f7 47 22 f0 ff 74 5a 48 8b 46 08 48 89 f7 48 85 c0 74 42 8b 15 RSP: 0018:ffffc9000109f9a8 EFLAGS: 00000006 RAX: 0000000000000005 RBX: ffff8880123da708 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8ab78460 RDI: ffff8880123da708 RBP: ffffffff8ab78460 R08: 0000000000000000 R09: ffffffff8c838317 R10: fffffbfff1907062 R11: 0000000000000001 R12: ffff8880123d9cc0 R13: ffff8880123da6e0 R14: 00000000ffffffff R15: ffff8880123da708 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6275b9600 CR3: 000000007f24f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_is_held kernel/locking/lockdep.c:5380 [inline] lock_is_held_type+0xa7/0x140 kernel/locking/lockdep.c:5682 lock_is_held include/linux/lockdep.h:283 [inline] rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125 trace_sched_util_est_cfs_tp include/trace/events/sched.h:723 [inline] trace_sched_util_est_cfs_tp include/trace/events/sched.h:723 [inline] util_est_enqueue kernel/sched/fair.c:3986 [inline] enqueue_task_fair+0xde3/0x1af0 kernel/sched/fair.c:5606 enqueue_task kernel/sched/core.c:2010 [inline] activate_task kernel/sched/core.c:2035 [inline] ttwu_do_activate+0x18b/0x5e0 kernel/sched/core.c:3614 ttwu_queue kernel/sched/core.c:3810 [inline] try_to_wake_up+0x4e4/0x12f0 kernel/sched/core.c:4133 __queue_work+0x4ae/0xc70 kernel/workqueue.c:1534 queue_work_on+0x70/0x80 kernel/workqueue.c:1562 __lru_add_drain_all+0x2b4/0x6e0 mm/swap.c:843 khugepaged_do_scan mm/khugepaged.c:2236 [inline] khugepaged+0xf0/0x3f30 mm/khugepaged.c:2297 kthread+0x299/0x340 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 48 c7 c7 40 a7 cb 88 mov $0xffffffff88cba740,%rdi 7: e8 3b 50 be ff callq 0xffbe5047 c: e8 f2 29 ce ff callq 0xffce2a03 11: 31 c0 xor %eax,%eax 13: 5d pop %rbp 14: c3 retq 15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1c: 53 push %rbx 1d: 48 89 fb mov %rdi,%rbx 20: 48 83 ec 08 sub $0x8,%rsp 24: 48 39 77 10 cmp %rsi,0x10(%rdi) 28: 74 6a je 0x94 * 2a: 66 f7 47 22 f0 ff testw $0xfff0,0x22(%rdi) <-- trapping instruction 30: 74 5a je 0x8c 32: 48 8b 46 08 mov 0x8(%rsi),%rax 36: 48 89 f7 mov %rsi,%rdi 39: 48 85 c0 test %rax,%rax 3c: 74 42 je 0x80 3e: 8b .byte 0x8b 3f: 15 .byte 0x15