INFO: task syz-executor.2:4048 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27128 pid: 4048 ppid: 3921 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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+0x629/0x1990 fs/xfs/xfs_super.c:1481
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007fa882632188 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: 00007fff4d75bcef R14: 00007fa882632300 R15: 0000000000022000
INFO: task syz-executor.2:4102 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29624 pid: 4102 ppid: 3921 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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:609
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:00007fa8825f0188 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: 00007fff4d75bcef R14: 00007fa8825f0300 R15: 0000000000022000
INFO: task syz-executor.2:4112 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28904 pid: 4112 ppid: 3921 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1151
__down_write_common kernel/locking/rwsem.c:1268 [inline]
__down_write_common kernel/locking/rwsem.c:1265 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1524
grab_super+0x50/0x1c0 fs/super.c:389
sget_fc+0x1e3/0x700 fs/super.c:564
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007fa8825cf188 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: 00007fff4d75bcef R14: 00007fa8825cf300 R15: 0000000000022000
INFO: task syz-executor.4:4047 blocked for more than 144 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26392 pid: 4047 ppid: 3926 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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+0x629/0x1990 fs/xfs/xfs_super.c:1481
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007f98bf281188 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: 00007ffccc99275f R14: 00007f98bf281300 R15: 0000000000022000
INFO: task syz-executor.4:4103 blocked for more than 144 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29624 pid: 4103 ppid: 3926 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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:609
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:00007f98bf23f188 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: 00007ffccc99275f R14: 00007f98bf23f300 R15: 0000000000022000
INFO: task syz-executor.4:4111 blocked for more than 144 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28336 pid: 4111 ppid: 3926 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1151
__down_write_common kernel/locking/rwsem.c:1268 [inline]
__down_write_common kernel/locking/rwsem.c:1265 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1524
grab_super+0x50/0x1c0 fs/super.c:389
sget_fc+0x1e3/0x700 fs/super.c:564
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007f98bf21e188 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: 00007ffccc99275f R14: 00007f98bf21e300 R15: 0000000000022000
INFO: task syz-executor.0:4077 blocked for more than 144 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27128 pid: 4077 ppid: 3922 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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+0x629/0x1990 fs/xfs/xfs_super.c:1481
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007fd5ddb48188 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: 00007ffc0ae1243f R14: 00007fd5ddb48300 R15: 0000000000022000
INFO: task syz-executor.0:4136 blocked for more than 145 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28272 pid: 4136 ppid: 3922 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1151
__down_write_common kernel/locking/rwsem.c:1268 [inline]
__down_write_common kernel/locking/rwsem.c:1265 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1524
grab_super+0x50/0x1c0 fs/super.c:389
sget_fc+0x1e3/0x700 fs/super.c:564
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007fd5ddb06188 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: 00007ffc0ae1243f R14: 00007fd5ddb06300 R15: 0000000000022000
INFO: task syz-executor.3:4078 blocked for more than 145 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27128 pid: 4078 ppid: 3916 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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+0x629/0x1990 fs/xfs/xfs_super.c:1481
get_tree_bdev+0x398/0x680 fs/super.c:1295
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007faa97c86188 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: 00007fffcafe43df R14: 00007faa97c86300 R15: 0000000000022000
INFO: task syz-executor.3:4139 blocked for more than 145 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28368 pid: 4139 ppid: 3916 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1151
__down_write_common kernel/locking/rwsem.c:1268 [inline]
__down_write_common kernel/locking/rwsem.c:1265 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1524
grab_super+0x50/0x1c0 fs/super.c:389
sget_fc+0x1e3/0x700 fs/super.c:564
get_tree_bdev+0x17d/0x680 fs/super.c:1265
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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:00007faa97c44188 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: 00007fffcafe43df R14: 00007faa97c44300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8ab78c00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3317:
#0: ffff88814b0c2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900027962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.2/4048:
#0: ffff88801c0600e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
1 lock held by syz-executor.2/4102:
#0: ffff888018e1d998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1504
2 locks held by syz-executor.2/4112:
#0: ffff888140854118 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff88801c0600e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
1 lock held by syz-executor.4/4047:
#0: ffff888018d1a0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
1 lock held by syz-executor.4/4103:
#0: ffff888018fa1998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1504
2 locks held by syz-executor.4/4111:
#0: ffff888140855898 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff888018d1a0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
1 lock held by syz-executor.0/4077:
#0: ffff8880179880e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
2 locks held by syz-executor.0/4136:
#0: ffff888140852998 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff8880179880e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
1 lock held by syz-executor.3/4078:
#0: ffff88807dedc0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
2 locks held by syz-executor.3/4139:
#0: ffff888140854cd8 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff88807dedc0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
1 lock held by syz-executor.5/4092:
#0: ffff88807df1e0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
2 locks held by syz-executor.5/4159:
#0: ffff888140856458 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff88807df1e0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
1 lock held by syz-executor.1/4096:
#0: ffff8880203f60e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
2 locks held by syz-executor.1/4162:
#0: ffff888140853558 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1255
#1: ffff8880203f60e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc6-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:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
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 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x15e/0x1c0 drivers/acpi/processor_idle.c:553