INFO: task syz-executor:5846 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23568 pid:5846  tgid:5846  ppid:5844   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 io_schedule+0xbf/0x130 kernel/sched/core.c:7681
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x933/0x1270 fs/jbd2/transaction.c:1096
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1245
 __ext4_journal_get_write_access+0x6a/0x390 fs/ext4/ext4_jbd2.c:239
 ext4_reserve_inode_write+0x13b/0x270 fs/ext4/inode.c:5830
 __ext4_mark_inode_dirty+0x1a6/0x890 fs/ext4/inode.c:6004
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6041
 __mark_inode_dirty+0x1f6/0xe60 fs/fs-writeback.c:2515
 generic_update_time+0xcf/0xf0 fs/inode.c:2113
 inode_update_time fs/inode.c:2126 [inline]
 __file_update_time fs/inode.c:2354 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2384
 ext4_page_mkwrite+0x368/0x1760 fs/ext4/inode.c:6159
 do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 wp_page_shared mm/memory.c:3563 [inline]
 do_wp_page+0xcbf/0x4930 mm/memory.c:3713
 handle_pte_fault mm/memory.c:5782 [inline]
 __handle_mm_fault+0x1a93/0x2a10 mm/memory.c:5909
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6077
 do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f549ae56465
RSP: 002b:00007ffc75a8a860 EFLAGS: 00010216
RAX: 00007f5494b94504 RBX: 00007ffc75a8a970 RCX: 0000000000000000
RDX: 00007f5494b94500 RSI: 0000000000000008 RDI: 00007ffc75a8a970
RBP: 00000000000003e6 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffc75a8a950 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000006bafc R14: fffffffffff94504 R15: 000000000006bafc
 </TASK>
INFO: task syz.2.1322:14602 blocked for more than 144 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1322      state:D stack:25808 pid:14602 tgid:14602 ppid:13925  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 io_schedule+0xbf/0x130 kernel/sched/core.c:7681
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x933/0x1270 fs/jbd2/transaction.c:1096
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1245
 __ext4_journal_get_write_access+0x6a/0x390 fs/ext4/ext4_jbd2.c:239
 ext4_reserve_inode_write+0x13b/0x270 fs/ext4/inode.c:5830
 __ext4_mark_inode_dirty+0x1a6/0x890 fs/ext4/inode.c:6004
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6041
 __mark_inode_dirty+0x1f6/0xe60 fs/fs-writeback.c:2515
 generic_update_time+0xcf/0xf0 fs/inode.c:2113
 inode_update_time fs/inode.c:2126 [inline]
 __file_update_time fs/inode.c:2354 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2384
 ext4_page_mkwrite+0x368/0x1760 fs/ext4/inode.c:6159
 do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 do_shared_fault mm/memory.c:5373 [inline]
 do_fault mm/memory.c:5435 [inline]
 do_pte_missing+0x29e/0x3e70 mm/memory.c:3965
 handle_pte_fault mm/memory.c:5766 [inline]
 __handle_mm_fault+0x100a/0x2a10 mm/memory.c:5909
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6077
 do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f4fc5c5d536
RSP: 002b:00007ffc05390f10 EFLAGS: 00010202
RAX: 0000000000020008 RBX: 00007f4fc6a65720 RCX: 0000000000000000
RDX: 0000001b31e00000 RSI: 0000000000000008 RDI: 00007f4fc6a65720
RBP: ffffffff81d4c53c R08: 00007f4fc53ff048 R09: 00007f4fc5f22000
R10: 00007f4fc53ff008 R11: 0000000000000006 R12: 000000000000088e
R13: 00007f4fc5f36038 R14: 00000000000001a7 R15: fffffffffffe0000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by getty/5619:
 #0: ffff8880313a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fc62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5846:
 #0: ffff888034965ec8 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
 #0: ffff888034965ec8 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6243
 #1: ffff888034f60518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 #2: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
4 locks held by kworker/u8:19/6612:
 #0: ffff88814e4d4148 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc9000bbffd80 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
 #3: ffff88807acf1658 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x352/0x1370 fs/ext4/inode.c:701
3 locks held by syz.1.1255/13766:
6 locks held by kworker/u8:0/14065:
 #0: ffff8881436d6148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc900105c7d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffff888034f600e0 (&type->s_umount_key#32){++++}-{4:4}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
 #3: ffff888034f62b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
 #4: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
 #5: ffff88806776bdf8 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x352/0x1370 fs/ext4/inode.c:701
3 locks held by syz-executor/14446:
 #0: ffff888034f60420 (sb_writers#4){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4073
 #1: ffff88807af4f0f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
 #1: ffff88807af4f0f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1c2/0x530 fs/namei.c:4080
 #2: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
3 locks held by syz-executor/14453:
 #0: ffff888034f60420 (sb_writers#4){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4073
 #1: ffff8880620983f8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
 #1: ffff8880620983f8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1c2/0x530 fs/namei.c:4080
 #2: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
3 locks held by syz.2.1322/14602:
 #0: ffff8880304dd808 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
 #0: ffff8880304dd808 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6243
 #1: ffff888034f60518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 #2: ffff888034f64958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __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:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf0c/0x1240 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13766 Comm: syz.1.1255 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x36/0xc0 kernel/rcu/tree.c:737
Code: 7e e8 3e 14 a2 09 48 c7 c3 a8 81 03 00 83 f8 07 89 c5 0f 87 82 00 00 00 48 8d 3c ed a0 fb 81 8d 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 75 5c 48 03 1c ed a0 fb 81 8d 48
RSP: 0018:ffffc9000f23f6c0 EFLAGS: 00000297
RAX: dffffc0000000000 RBX: 00000000000381a8 RCX: ffffffff816a7bf9
RDX: fffffbfff2039a3b RSI: ffffffff8bb05da0 RDI: ffffffff8d81fba8
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2039a3a
R10: ffffffff901cd1d7 R11: 0000000000000002 R12: ffffffff8ddba840
R13: 0000000000000201 R14: 000000000003da8c R15: ffff88806d029548
FS:  00007f115249a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000009 CR3: 000000008bec0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x4f6/0x6f0 kernel/locking/lockdep.c:5860
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 page_ref_add_unless.constprop.0+0xec/0x390 include/linux/page_ref.h:239
 folio_ref_add_unless include/linux/page_ref.h:248 [inline]
 folio_try_get include/linux/page_ref.h:264 [inline]
 filemap_get_entry+0x152/0x3c0 mm/filemap.c:1852
 shmem_get_folio_gfp+0x221/0x1530 mm/shmem.c:2259
 shmem_fault+0x200/0xae0 mm/shmem.c:2536
 __do_fault+0x10a/0x490 mm/memory.c:4882
 do_shared_fault mm/memory.c:5361 [inline]
 do_fault mm/memory.c:5435 [inline]
 do_pte_missing+0x1a8/0x3e70 mm/memory.c:3965
 handle_pte_fault mm/memory.c:5766 [inline]
 __handle_mm_fault+0x100a/0x2a10 mm/memory.c:5909
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6077
 do_user_addr_fault+0x7a3/0x13f0 arch/x86/mm/fault.c:1389
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_8+0x11/0x20 arch/x86/lib/putuser.S:107
Code: 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 cc cc cc cc 66 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f23feb0 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000009
RDX: 1ffff1100626daa3 RSI: ffffffff813d8970 RDI: ffff88803136d518
RBP: 0000000000000009 R08: 0000000000000000 R09: fffffbfff2039a3a
R10: ffffffff901cd1d7 R11: 0000000000000000 R12: ffff88803136bc00
R13: 000000000000009e R14: 0000000000000000 R15: 0000000000000000
 shstk_prctl+0x333/0x6a0 arch/x86/kernel/shstk.c:540
 do_arch_prctl_64+0x249/0x710 arch/x86/kernel/process_64.c:974
 __do_sys_arch_prctl arch/x86/kernel/process_64.c:987 [inline]
 __se_sys_arch_prctl arch/x86/kernel/process_64.c:983 [inline]
 __x64_sys_arch_prctl+0x63/0xc0 arch/x86/kernel/process_64.c:983
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f115177e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f115249a038 EFLAGS: 00000246 ORIG_RAX: 000000000000009e
RAX: ffffffffffffffda RBX: 00007f1151936080 RCX: 00007f115177e819
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000005005
RBP: 00007f11517f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f1151936080 R15: 00007fff88481b18
 </TASK>