INFO: task syz-executor.4:21185 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:27088 pid:21185 ppid:5070   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 io_schedule+0xbe/0x130 kernel/sched/core.c:9026
 folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
 folio_lock include/linux/pagemap.h:1042 [inline]
 clean_bdev_aliases+0x56b/0x610 fs/buffer.c:1725
 clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
 __block_write_begin_int+0x8d6/0x14d0 fs/buffer.c:2118
 iomap_write_begin+0x5be/0x1800 fs/iomap/buffered-io.c:774
 iomap_write_iter fs/iomap/buffered-io.c:909 [inline]
 iomap_file_buffered_write+0x3d6/0x9a0 fs/iomap/buffered-io.c:970
 blkdev_buffered_write block/fops.c:634 [inline]
 blkdev_write_iter+0x4f5/0xc90 block/fops.c:684
 call_write_iter include/linux/fs.h:1956 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x650/0xe40 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f758307cae9
RSP: 002b:00007f7581bfe0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f758319c050 RCX: 00007f758307cae9
RDX: 000000000156a396 RSI: 0000000020002a40 RDI: 0000000000000003
RBP: 00007f75830c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f758319c050 R15: 00007ffc750ec908
 </TASK>
INFO: task syz-executor.4:21186 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:28160 pid:21186 ppid:5070   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 io_schedule+0xbe/0x130 kernel/sched/core.c:9026
 folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
 __folio_lock mm/filemap.c:1629 [inline]
 folio_lock include/linux/pagemap.h:1042 [inline]
 folio_lock include/linux/pagemap.h:1038 [inline]
 __filemap_get_folio+0x69e/0xbc0 mm/filemap.c:1882
 __iomap_get_folio fs/iomap/buffered-io.c:701 [inline]
 iomap_write_begin+0x669/0x1800 fs/iomap/buffered-io.c:744
 iomap_write_iter fs/iomap/buffered-io.c:909 [inline]
 iomap_file_buffered_write+0x3d6/0x9a0 fs/iomap/buffered-io.c:970
 blkdev_buffered_write block/fops.c:634 [inline]
 blkdev_write_iter+0x4f5/0xc90 block/fops.c:684
 call_write_iter include/linux/fs.h:1956 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x650/0xe40 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f758307cae9
RSP: 002b:00007f757981d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f758319c120 RCX: 00007f758307cae9
RDX: 000000000156a396 RSI: 0000000020002a40 RDI: 0000000000000003
RBP: 00007f75830c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f758319c120 R15: 00007ffc750ec908
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4788:
 #0: ffff8880263530a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.4/21239:
 #0: ffff888094fc00e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff888094fc00e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff888094fc00e0 (&type->s_umount_key#31){++++}-{3:3}, at: get_tree_bdev+0x391/0x650 fs/super.c:1575

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:207
Code: b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 fd f5 7b 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 c0 bc 03 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc900000e76f0 EFLAGS: 00000246
RAX: 0000000080000002 RBX: ffffc900000e7778 RCX: 0000000080000002
RDX: 1ffff9200001cef7 RSI: ffffffff813a577d RDI: ffffc900000e77b8
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 924e47fb297d86db R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00d5f9000 CR3: 000000000c976000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 unwind_next_frame+0x114d/0x2390 arch/x86/kernel/unwind_orc.c:664
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1023 [inline]
 __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1043
 kmalloc_reserve+0xef/0x260 net/core/skbuff.c:581
 __alloc_skb+0x12b/0x330 net/core/skbuff.c:650
 alloc_skb include/linux/skbuff.h:1286 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
 nsim_dev_trap_report_work+0x29e/0xc70 drivers/net/netdevsim/dev.c:850
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>