INFO: task syz.2.18:6678 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack:28856 pid:6678 tgid:6676 ppid:6362 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083 rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:980 [inline] blkdev_fallocate+0x24c/0x430 block/fops.c:911 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd302385d29 RSP: 002b:00007fd3015fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fd302575fa0 RCX: 00007fd302385d29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007fd302401b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd302575fa0 R15: 00007ffdc14f2a38 INFO: task syz.1.17:6689 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack:28680 pid:6689 tgid:6688 ppid:6358 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083 rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:980 [inline] blkdev_fallocate+0x24c/0x430 block/fops.c:911 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0965585d29 RSP: 002b:00007f0966400038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f0965775fa0 RCX: 00007f0965585d29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007f0965601b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0965775fa0 R15: 00007ffeddc4e228 INFO: task syz.0.16:6692 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:28856 pid:6692 tgid:6691 ppid:6353 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083 rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:980 [inline] blkdev_fallocate+0x24c/0x430 block/fops.c:911 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f57c1f85d29 RSP: 002b:00007f57c2e67038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f57c2175fa0 RCX: 00007f57c1f85d29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007f57c2001b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f57c2175fa0 R15: 00007ffe41587d28 INFO: task syz.4.20:6698 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.20 state:D stack:28856 pid:6698 tgid:6697 ppid:6369 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083 rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:980 [inline] blkdev_fallocate+0x24c/0x430 block/fops.c:911 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9e6a585d29 RSP: 002b:00007f9e6b3b6038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f9e6a775fa0 RCX: 00007f9e6a585d29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007f9e6a601b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9e6a775fa0 R15: 00007ffcf250dce8 Showing all locks held in the system: 1 lock held by ksoftirqd/0/15: 1 lock held by khungtaskd/31: #0: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775 6 locks held by kworker/u8:7/3457: #0: ffff8880b843a398 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:638 #1: ffff8880b8424088 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline] #1: ffff8880b8424088 (psi_seq){-.-.}-{0:0}, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6923 #2: ffff8880b8425b18 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x127/0x1d0 kernel/time/timer.c:1004 #3: ffff888031fe54e0 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #3: ffff888031fe54e0 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report drivers/net/netdevsim/dev.c:806 [inline] #3: ffff888031fe54e0 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x1cd/0xcf0 drivers/net/netdevsim/dev.c:866 #4: ffffffff9ad9e0c8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x14c/0x4c0 lib/debugobjects.c:818 #5: ffffffff8eedc178 (pool_lock#2){-.-.}-{2:2}, at: class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline] #5: ffffffff8eedc178 (pool_lock#2){-.-.}-{2:2}, at: pcpu_alloc+0x268/0x350 lib/debugobjects.c:273 2 locks held by getty/5575: #0: ffff888035dbd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222 4 locks held by syz.3.19/6601: 1 lock held by syz.2.18/6678: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.1.17/6689: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.0.16/6692: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.4.20/6698: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.5.21/6813: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.6.22/6899: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.9.25/6919: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.8.24/6921: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.7.23/6923: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.3.26/6946: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.2.27/6982: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.1.29/7034: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.0.28/7037: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.4.30/7040: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.5.31/7071: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.6.32/7101: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.7.33/7167: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.9.35/7191: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.8.34/7199: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.3.36/7205: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.2.37/7227: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.1.38/7258: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.0.39/7315: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.4.40/7324: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.5.41/7331: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.6.42/7352: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.7.43/7381: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.8.45/7478: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.3.46/7483: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.9.44/7482: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.2.47/7485: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.1.48/7508: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.4.49/7610: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.0.50/7615: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.6.52/7627: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.5.51/7633: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 1 lock held by syz.7.53/7641: #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff888148c6ef28 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_fallocate+0x24c/0x430 block/fops.c:911 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0xf3f/0x1170 kernel/hung_task.c:495 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82 Code: 67 74 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 75 23 00 fb f4 3c 0a 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6 RAX: 0000000000139113 RBX: 0000000000000001 RCX: ffffffff8b66b2a9 RDX: 0000000000000000 RSI: ffffffff8db03325 RDI: ffffffff8bf1dec0 RBP: ffffed1003adb490 R08: 0000000000000001 R09: ffffed10170a6655 R10: ffff8880b85332ab R11: 0000000000000001 R12: 0000000000000001 R13: ffff88801d6da480 R14: ffffffff908313d0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124ad8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555585d1a5c8 CR3: 00000000748d4000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x38d/0x500 kernel/sched/idle.c:330 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x148