INFO: task kworker/u8:2:35 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2 state:D stack:24448 pid:35 tgid:35 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
io_schedule+0xbf/0x130 kernel/sched/core.c:7577
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1309
folio_lock include/linux/pagemap.h:1148 [inline]
mpage_prepare_extent_to_map+0xa16/0x1470 fs/ext4/inode.c:2480
ext4_do_writepages+0x974/0x32f0 fs/ext4/inode.c:2688
ext4_writepages+0x303/0x730 fs/ext4/inode.c:2824
do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
__writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1680
writeback_sb_inodes+0x603/0xfa0 fs/fs-writeback.c:1976
__writeback_inodes_wb+0xff/0x2e0 fs/fs-writeback.c:2047
wb_writeback+0x72d/0xb60 fs/fs-writeback.c:2158
wb_check_background_flush fs/fs-writeback.c:2228 [inline]
wb_do_writeback fs/fs-writeback.c:2316 [inline]
wb_workfn+0x741/0xbc0 fs/fs-writeback.c:2343
process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
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
INFO: task syz-executor:5829 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:23312 pid:5829 tgid:5829 ppid:5827 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
io_schedule+0xbf/0x130 kernel/sched/core.c:7577
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:209
__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:101 [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: 0033:0x7ff3a4a563f5
RSP: 002b:00007ffdae7db410 EFLAGS: 00010202
RAX: 00007ff3a2600000 RBX: 00007ffdae7db520 RCX: 00007ff3a1800210
RDX: 00007ff3a25ffffc RSI: 0000000000000008 RDI: 00007ffdae7db520
RBP: 00000000000003e6 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffdae7db500 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz.7.1771:19199 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.1771 state:D stack:27008 pid:19199 tgid:19195 ppid:17599 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
io_schedule+0xbf/0x130 kernel/sched/core.c:7577
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1309
folio_wait_writeback+0x3c/0x90 mm/page-writeback.c:3189
mpage_prepare_extent_to_map+0x533/0x1470 fs/ext4/inode.c:2496
ext4_do_writepages+0x974/0x32f0 fs/ext4/inode.c:2688
ext4_writepages+0x303/0x730 fs/ext4/inode.c:2824
do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
filemap_fdatawrite_wbc mm/filemap.c:398 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:388
__filemap_fdatawrite_range+0xb3/0xf0 mm/filemap.c:431
file_write_and_wait_range+0xca/0x140 mm/filemap.c:788
ext4_sync_file+0x290/0xf30 fs/ext4/fsync.c:158
vfs_fsync_range+0x136/0x220 fs/sync.c:187
__do_sys_msync+0x3c6/0x5b0 mm/msync.c:96
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: 0033:0x7fbb94d7e759
RSP: 002b:00007fbb95a9e038 EFLAGS: 00000246 ORIG_RAX: 000000000000001a
RAX: ffffffffffffffda RBX: 00007fbb94f36130 RCX: 00007fbb94d7e759
RDX: 0000000400000004 RSI: 0080100000000005 RDI: 000000001ffff000
RBP: 00007fbb94df175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbb94f36130 R15: 00007ffeb866f608
INFO: task syz.4.1844:20841 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1844 state:D stack:25808 pid:20841 tgid:20841 ppid:19408 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
io_schedule+0xbf/0x130 kernel/sched/core.c:7577
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:209
__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:101 [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: 0033:0x7fb95805d486
RSP: 002b:00007fffff5e6440 EFLAGS: 00010202
RAX: 0000000000050008 RBX: 00007fb958e65720 RCX: 0000000000000000
RDX: 0000001b308d0000 RSI: 0000000000000008 RDI: 00007fb958e65720
RBP: ffffffff81c925fd R08: 00007fb9563f6058 R09: 00007fb958322000
R10: 0000000081e4f29b R11: 000000000000001b R12: 0000000000000521
R13: 00007fb9583362a0 R14: 00000000000000f3 R15: fffffffffffb0000
INFO: task syz-executor:20916 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:26016 pid:20916 tgid:20916 ppid:5829 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
io_schedule+0xbf/0x130 kernel/sched/core.c:7577
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:209
__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:101 [inline]
__wait_on_buffer+0x64/0x70 fs/buffer.c:123
wait_on_buffer include/linux/buffer_head.h:414 [inline]
__ext4_find_entry+0x976/0x1090 fs/ext4/namei.c:1637
ext4_lookup_entry fs/ext4/namei.c:1729 [inline]
ext4_lookup+0x53f/0x730 fs/ext4/namei.c:1797
lookup_one_qstr_excl+0x11d/0x190 fs/namei.c:1692
filename_create+0x1ed/0x530 fs/namei.c:4081
do_mkdirat+0xab/0x3a0 fs/namei.c:4326
__do_sys_mkdir fs/namei.c:4354 [inline]
__se_sys_mkdir fs/namei.c:4352 [inline]
__x64_sys_mkdir+0xef/0x140 fs/namei.c:4352
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: 0033:0x7f9c75d7cfc7
RSP: 002b:00007ffcb02cd248 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffcb02cd392 RCX: 00007f9c75d7cfc7
RDX: 00000000127178e8 RSI: 00000000000001c0 RDI: 00007ffcb02cd380
RBP: f49998db0aa753ff R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 8421084210842109
R13: 00007ffcb02cd392 R14: 00007f9c75e12f20 R15: 00000000127178e8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
4 locks held by kworker/u8:2/35:
#0: ffff8881416da948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc90000ab7d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffff88814ea440e0 (&type->s_umount_key#32){++++}-{3:3}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
#3: ffff88814ea46b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
2 locks held by getty/5600:
#0: ffff88803543a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900032332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5829:
#0: ffff888028b34580 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff888028b34580 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6243
#1: ffff88814ea44518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
#2: ffff88814ea48958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
2 locks held by kworker/u8:36/6624:
#0: ffff888145ecb948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000c82fd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
1 lock held by syz.7.1771/19199:
#0: ffff88814ea46b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
3 locks held by syz.4.1844/20841:
#0: ffff8880443d78e0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff8880443d78e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6243
#1: ffff88814ea44518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
#2: ffff88814ea48958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
2 locks held by syz-executor/20916:
#0: ffff88814ea44420 (sb_writers#4){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4073
#1: ffff8880784803f8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff8880784803f8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:4080
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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: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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9066 Comm: kworker/u8:39 Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:122 [inline]
RIP: 0010:lock_release+0x129/0x6f0 kernel/locking/lockdep.c:5838
Code: 0f 85 d6 02 00 00 65 4c 8b 35 93 a8 99 7e 49 8d be dc 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 59 05 00 00 41
RSP: 0018:ffffc90004b47a48 EFLAGS: 00000a03
RAX: dffffc0000000000 RBX: 1ffff92000968f4b RCX: ffffffff816a3309
RDX: 0000000000000000 RSI: ffffffff8bb15360 RDI: ffff88802fc90adc
RBP: ffffffff901d9994 R08: 0000000000000000 R09: fffffbfff203acd1
R10: ffffffff901d668f R11: 0000000000000000 R12: ffff888063e71b58
R13: ffff888063e71b40 R14: ffff88802fc90000 R15: ffff888067d321c0
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557105158398 CR3: 000000000db7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline]
_raw_spin_unlock_bh+0x16/0x30 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x1c6/0x390 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x94a/0x1060 net/batman-adv/network-coding.c:722
process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
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