INFO: task kworker/u4:13:21206 blocked for more than 143 seconds.
Not tainted 6.8.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:13 state:D stack:21272 pid:21206 tgid:21206 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-btrfs-1269)
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
wait_extent_bit fs/btrfs/extent-io-tree.c:822 [inline]
lock_extent+0x69d/0x860 fs/btrfs/extent-io-tree.c:1868
find_lock_delalloc_range+0x4b5/0x970 fs/btrfs/extent_io.c:395
writepage_delalloc+0x17f/0x480 fs/btrfs/extent_io.c:1217
__extent_writepage fs/btrfs/extent_io.c:1475 [inline]
extent_write_cache_pages fs/btrfs/extent_io.c:2152 [inline]
extent_writepages+0x1159/0x2580 fs/btrfs/extent_io.c:2274
do_writepages+0x3aa/0x680 mm/page-writeback.c:2553
__writeback_single_inode+0x155/0xfd0 fs/fs-writeback.c:1625
writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916
wb_writeback+0x44d/0xc80 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x400/0xfb0 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
INFO: task syz-executor.0:8550 blocked for more than 144 seconds.
Not tainted 6.8.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25112 pid:8550 tgid:8550 ppid:5082 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x110 kernel/sched/core.c:9023
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1274
btrfs_page_mkwrite+0x60d/0x10c0 fs/btrfs/inode.c:8170
do_page_mkwrite+0x19b/0x480 mm/memory.c:2966
wp_page_shared mm/memory.c:3353 [inline]
do_wp_page+0x20e3/0x4c90 mm/memory.c:3493
handle_pte_fault mm/memory.c:5160 [inline]
__handle_mm_fault+0x26ad/0x72d0 mm/memory.c:5285
handle_mm_fault+0x27e/0x770 mm/memory.c:5450
do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
handle_page_fault arch/x86/mm/fault.c:1507 [inline]
exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fa9cc62c551
RSP: 002b:00007ffd34cfaf50 EFLAGS: 00010246
RAX: 00000000200002c0 RBX: 00007ffd34cfb098 RCX: 0000000000000000
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 00005555559d2360
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000041c3a R12: 0000000000000004
R13: fffffffffffffffe R14: 00007fa9cc200000 R15: 00007fa9cc2060a8
INFO: task syz-executor.0:8551 blocked for more than 144 seconds.
Not tainted 6.8.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23576 pid:8551 tgid:8550 ppid:5082 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x380 fs/fs-writeback.c:2672
try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2720
btrfs_start_delalloc_flush fs/btrfs/transaction.c:2162 [inline]
btrfs_commit_transaction+0x892/0x3740 fs/btrfs/transaction.c:2347
btrfs_sync_file+0xf3b/0x1310 fs/btrfs/file.c:2007
generic_write_sync include/linux/fs.h:2735 [inline]
btrfs_do_write_iter+0xbc5/0x1190 fs/btrfs/file.c:1697
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa81/0xcb0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fa9cc67dda9
RSP: 002b:00007fa9cd3ce0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa9cc7abf80 RCX: 00007fa9cc67dda9
RDX: 000000000208e24b RSI: 0000000020000300 RDI: 0000000000000005
RBP: 00007fa9cc6ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa9cc7abf80 R15: 00007ffd34cfaea8
INFO: task syz-executor.0:8612 blocked for more than 145 seconds.
Not tainted 6.8.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23512 pid:8612 tgid:8550 ppid:5082 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x110 kernel/sched/core.c:9023
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1274
btrfs_page_mkwrite+0x60d/0x10c0 fs/btrfs/inode.c:8170
do_page_mkwrite+0x19b/0x480 mm/memory.c:2966
wp_page_shared mm/memory.c:3353 [inline]
do_wp_page+0x20e3/0x4c90 mm/memory.c:3493
handle_pte_fault mm/memory.c:5160 [inline]
__handle_mm_fault+0x26ad/0x72d0 mm/memory.c:5285
handle_mm_fault+0x27e/0x770 mm/memory.c:5450
do_user_addr_fault arch/x86/mm/fault.c:1415 [inline]
handle_page_fault arch/x86/mm/fault.c:1507 [inline]
exc_page_fault+0x2ad/0x870 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc90013eb7530 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000020000118 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc90013eb75e0 RDI: 00000000200000e0
RBP: ffffc90013eb7690 R08: ffffc90013eb7617 R09: 1ffff920027d6ec2
R10: dffffc0000000000 R11: fffff520027d6ec3 R12: 0000000000000038
R13: ffffc90013eb75e0 R14: 00000000200000e0 R15: ffffc90013eb75e0
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
_copy_to_user+0x86/0xb0 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:191 [inline]
fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145
emit_last_fiemap_cache fs/btrfs/extent_io.c:2555 [inline]
extent_fiemap+0x1b9c/0x1fe0 fs/btrfs/extent_io.c:3082
btrfs_fiemap+0x178/0x1f0 fs/btrfs/inode.c:7848
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x1a02/0x2b60 fs/ioctl.c:811
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:857
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fa9cc67dda9
RSP: 002b:00007fa9cd3ad0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa9cc7ac050 RCX: 00007fa9cc67dda9
RDX: 00000000200000c0 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007fa9cc6ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa9cc7ac050 R15: 00007ffd34cfaea8
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995
1 lock held by khungtaskd/29:
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4809:
#0: ffff8880306c80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-fuzzer/5169:
2 locks held by kworker/1:4/5135:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004607d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004607d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by kworker/u4:13/21206:
#0: ffff8880192ddd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff8880192ddd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900034afd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900034afd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by kworker/u4:17/21212:
#0: ffff888014c8d538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
3 locks held by syz-executor.0/8550:
#0: ffff88802cbdbef0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline]
#0: ffff88802cbdbef0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f9/0x730 mm/memory.c:5606
#1: ffff888030f76518 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x480 mm/memory.c:2966
#2: ffff88807a0d1e68 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x603/0x10c0 fs/btrfs/inode.c:8169
6 locks held by syz-executor.0/8551:
#0: ffff888021633248 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
#1: ffff888030f76420 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2795 [inline]
#1: ffff888030f76420 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x233/0xcb0 fs/read_write.c:586
#2: ffff888030f76610 (sb_internal#2){.+.+}-{0:0}, at: btrfs_sync_file+0xcd5/0x1310 fs/btrfs/file.c:1926
#3: ffff88801222a378 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x405/0xcf0 fs/btrfs/transaction.c:292
#4: ffff88801222a3a0 (btrfs_trans_num_extwriters){++++}-{0:0}, at: join_transaction+0x405/0xcf0 fs/btrfs/transaction.c:292
#5: ffff888030f760e0 (&type->s_umount_key#50){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717
4 locks held by syz-executor.0/8612:
#0: ffff88807a0d1fe0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88807a0d1fe0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xe0 fs/btrfs/inode.c:379
#1: ffff888061db73a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff888061db73a0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5477 [inline]
#1: ffff888061db73a0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2e0 mm/memory.c:5537
#2: ffff888030f76518 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x480 mm/memory.c:2966
#3: ffff88807a0d1e68 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x603/0x10c0 fs/btrfs/inode.c:8169
1 lock held by btrfs-transacti/8609:
#0: ffff8880122287c0 (&fs_info->transaction_kthread_mutex){+.+.}-{3:3}, at: transaction_kthread+0x100/0x500 fs/btrfs/disk-io.c:1576
4 locks held by syz-executor.0/9265:
2 locks held by syz-executor.3/11652:
#0: ffffffff8f362ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f362ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6612
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5079 Comm: syz-fuzzer Not tainted 6.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:504 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1104 [inline]
RIP: 0010:trace_rss_stat include/trace/events/kmem.h:346 [inline]
RIP: 0010:mm_trace_rss_stat+0x6e/0x200 mm/memory.c:180
Code: 48 8d 3c c5 a8 2e 84 8f be 08 00 00 00 e8 aa 5d 18 00 31 db 48 0f a3 2d b8 4e aa 0d 40 0f 92 c5 0f 92 c3 bf 02 00 00 00 89 de 3d 8e b9 ff 31 ff 89 de e8 34 8e b9 ff 40 84 ed 74 10 e8 aa f0
RSP: 0018:ffffc90003bbf468 EFLAGS: 00000247
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81d9dfe6
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffffffff8f842eaf R09: 1ffffffff1f085d5
R10: dffffc0000000000 R11: fffffbfff1f085d6 R12: ffff888014c83470
R13: dffffc0000000000 R14: ffff888014c82f80 R15: ffffc90003bbf6c0
FS: 000000c010869490(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c012dea000 CR3: 000000002c072000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
add_mm_counter include/linux/mm.h:2581 [inline]
add_mm_rss_vec+0xf4/0x310 mm/memory.c:479
zap_pte_range mm/memory.c:1541 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x27d2/0x3600 mm/memory.c:1668
zap_page_range_single+0x45c/0x630 mm/memory.c:1793
madvise_dontneed_single_vma mm/madvise.c:816 [inline]
madvise_dontneed_free mm/madvise.c:897 [inline]
madvise_vma_behavior mm/madvise.c:1036 [inline]
madvise_walk_vmas mm/madvise.c:1261 [inline]
do_madvise+0x2346/0x4660 mm/madvise.c:1441
__do_sys_madvise mm/madvise.c:1454 [inline]
__se_sys_madvise mm/madvise.c:1452 [inline]
__x64_sys_madvise+0xa5/0xc0 mm/madvise.c:1452
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x472417
Code: 10 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:000000c001d63e20 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 000000000000a000 RCX: 0000000000472417
RDX: 0000000000000004 RSI: 000000000000a000 RDI: 000000c018c70000
RBP: 000000c001d63e48 R08: 000000000000a000 R09: 0000000000000fff
R10: 0000000000000007 R11: 0000000000000246 R12: 3fffffffffffffff
R13: 0000000000003180 R14: 000000c01a47da00 R15: 0000000000000003