INFO: task kworker/u8:8:3456 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:8 state:D stack:19512 pid:3456 tgid:3456 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
io_schedule+0x8d/0x110 kernel/sched/core.c:7681
bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:247
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x121/0xe60 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x1ee/0x240 fs/jbd2/transaction.c:1245
__ext4_journal_get_write_access+0x1c8/0x680 fs/ext4/ext4_jbd2.c:239
ext4_mb_mark_context+0x196/0xfb0 fs/ext4/mballoc.c:4003
ext4_mb_mark_diskspace_used+0x3c8/0x960 fs/ext4/mballoc.c:4133
ext4_mb_new_blocks+0x1494/0x4e30 fs/ext4/mballoc.c:6235
ext4_ext_map_blocks+0x1beb/0x7e40 fs/ext4/extents.c:4379
ext4_map_create_blocks fs/ext4/inode.c:516 [inline]
ext4_map_blocks+0x8bf/0x1990 fs/ext4/inode.c:702
mpage_map_one_extent fs/ext4/inode.c:2219 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2272 [inline]
ext4_do_writepages+0x20ef/0x3d10 fs/ext4/inode.c:2735
ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2824
do_writepages+0x35f/0x880 mm/page-writeback.c:2702
__writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1680
writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1976
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2047
wb_writeback+0x427/0xbc0 fs/fs-writeback.c:2158
wb_check_old_data_flush fs/fs-writeback.c:2262 [inline]
wb_do_writeback fs/fs-writeback.c:2315 [inline]
wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2343
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz-executor:5824 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21616 pid:5824 tgid:5824 ppid:5822 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
io_schedule+0x8d/0x110 kernel/sched/core.c:7681
bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:247
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x121/0xe60 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x1ee/0x240 fs/jbd2/transaction.c:1245
__ext4_journal_get_write_access+0x1c8/0x680 fs/ext4/ext4_jbd2.c:239
ext4_reserve_inode_write+0x271/0x360 fs/ext4/inode.c:5830
__ext4_mark_inode_dirty+0x1ec/0x880 fs/ext4/inode.c:6004
ext4_dirty_inode+0xce/0x110 fs/ext4/inode.c:6041
__mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2112 [inline]
inode_update_time fs/inode.c:2125 [inline]
__file_update_time fs/inode.c:2353 [inline]
file_update_time+0x3d2/0x450 fs/inode.c:2383
ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6159
do_page_mkwrite+0x198/0x480 mm/memory.c:3176
wp_page_shared mm/memory.c:3577 [inline]
do_wp_page+0x2352/0x5160 mm/memory.c:3727
handle_pte_fault+0x111e/0x68a0 mm/memory.c:5817
__handle_mm_fault mm/memory.c:5944 [inline]
handle_mm_fault+0x1053/0x1ad0 mm/memory.c:6112
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fba5ea678fc
RSP: 002b:00007ffcb37bffd0 EFLAGS: 00010246
RAX: 00007fba5cc0c000 RBX: 000055555ec820b0 RCX: 0000000000000000
RDX: 1ffffffff0d219c8 RSI: 000055555ec85bc8 RDI: 0000000000000001
RBP: 00007ffcb37c04d0 R08: 000055555ec86de0 R09: 0000000000000339
R10: 0000000000000000 R11: 0000000000000135 R12: 00007ffcb37c0320
R13: 0000000000000005 R14: 00007ffcb37c0040 R15: 00007ffcb37c0110
INFO: task kworker/u8:6:12466 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:24016 pid:12466 tgid:12466 ppid:2 flags:0x00004000
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
io_schedule+0x8d/0x110 kernel/sched/core.c:7681
bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:247
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x121/0xe60 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x1ee/0x240 fs/jbd2/transaction.c:1245
__ext4_journal_get_write_access+0x1c8/0x680 fs/ext4/ext4_jbd2.c:239
ext4_reserve_inode_write+0x271/0x360 fs/ext4/inode.c:5830
__ext4_mark_inode_dirty+0x1ec/0x880 fs/ext4/inode.c:6004
ext4_convert_unwritten_extents_endio fs/ext4/extents.c:3800 [inline]
ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3932 [inline]
ext4_ext_map_blocks+0x3876/0x7e40 fs/ext4/extents.c:4271
ext4_map_create_blocks fs/ext4/inode.c:516 [inline]
ext4_map_blocks+0x8bf/0x1990 fs/ext4/inode.c:702
ext4_convert_unwritten_extents+0x2f3/0x6c0 fs/ext4/extents.c:4876
ext4_convert_unwritten_io_end_vec+0x101/0x170 fs/ext4/extents.c:4915
ext4_end_io_end fs/ext4/page-io.c:185 [inline]
ext4_do_flush_completed_IO fs/ext4/page-io.c:258 [inline]
ext4_end_io_rsv_work+0x36c/0x6f0 fs/ext4/page-io.c:272
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz.4.3017:12891 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.3017 state:D stack:25976 pid:12891 tgid:12891 ppid:5839 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
io_schedule+0x8d/0x110 kernel/sched/core.c:7681
bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:247
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x121/0xe60 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x1ee/0x240 fs/jbd2/transaction.c:1245
__ext4_journal_get_write_access+0x1c8/0x680 fs/ext4/ext4_jbd2.c:239
ext4_reserve_inode_write+0x271/0x360 fs/ext4/inode.c:5830
__ext4_mark_inode_dirty+0x1ec/0x880 fs/ext4/inode.c:6004
ext4_dirty_inode+0xce/0x110 fs/ext4/inode.c:6041
__mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2112 [inline]
inode_update_time fs/inode.c:2125 [inline]
__file_update_time fs/inode.c:2353 [inline]
file_update_time+0x3d2/0x450 fs/inode.c:2383
ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6159
do_page_mkwrite+0x198/0x480 mm/memory.c:3176
do_shared_fault mm/memory.c:5398 [inline]
do_fault mm/memory.c:5460 [inline]
do_pte_missing mm/memory.c:3979 [inline]
handle_pte_fault+0x1235/0x68a0 mm/memory.c:5801
__handle_mm_fault mm/memory.c:5944 [inline]
handle_mm_fault+0x1053/0x1ad0 mm/memory.c:6112
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fcf0f051c11
RSP: 002b:00007ffdcb16ae50 EFLAGS: 00010246
RAX: 00000000005ffdf0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b30720000 RSI: 0000000000600000 RDI: 00007fcf0f272290
RBP: 00007ffdcb16b0ac R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000011 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000051edd R14: 0000000000051ed2 R15: 00007ffdcb16b100
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
6 locks held by kworker/u8:8/3456:
#0: ffff88802028c948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88802028c948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000c7a7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000c7a7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88814e8580e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff88814e85ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1776 [inline]
#3: ffff88814e85ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1bf/0x3c0 fs/ext4/inode.c:2823
#4: ffff88814e85c958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
#5: ffff888078476598 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x7a6/0x1990 fs/ext4/inode.c:701
2 locks held by getty/5590:
#0: ffff88814e8180a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5824:
#0: ffff8880347598e0 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff8880347598e0 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6278
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1725 [inline]
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1890 [inline]
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6158
#2: ffff88814e85c958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
4 locks held by kworker/u8:6/12466:
#0: ffff888032947948 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888032947948 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000455fd00 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000455fd00 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88814e85c958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
#3: ffff88807855aa28 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x7a6/0x1990 fs/ext4/inode.c:701
3 locks held by syz.4.3017/12891:
#0: ffff88803535e730 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff88803535e730 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6278
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1725 [inline]
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1890 [inline]
#1: ffff88814e858518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6158
#2: ffff88814e85c958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
2 locks held by dhcpcd/13353:
#0: ffff88806cd86258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1617 [inline]
#0: ffff88806cd86258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3267
#1: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xffb/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 35 Comm: kworker/u8:2 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:kasan_check_range+0x1ba/0x290 mm/kasan/generic.c:189
Code: fb 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b 41 5c <41> 5e 41 5f 5d c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00 00 75
RSP: 0018:ffffc90000ab7550 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 0000000000000031 RCX: ffffffff817122b7
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942e9880
RBP: 0000000000000000 R08: ffffffff942e9887 R09: 1ffffffff285d310
R10: dffffc0000000000 R11: fffffbfff285d311 R12: ffff88801daa46c4
R13: 0000000000000014 R14: dffffc0000000001 R15: fffffbfff285d311
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564bd19e9600 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
check_wait_context kernel/locking/lockdep.c:4851 [inline]
__lock_acquire+0x5b7/0x2100 kernel/locking/lockdep.c:5176
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
crng_make_state+0x1b3/0xa80 drivers/char/random.c:368
_get_random_bytes+0xd7/0x2c0 drivers/char/random.c:406
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:776 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x69e/0xb50 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244