INFO: task syz.6.3133:19137 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.3133 state:D stack:25592 pid:19137 tgid:19137 ppid:18678 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7340
rwsem_down_read_slowpath+0x6d9/0x940 kernel/locking/rwsem.c:1114
__down_read_common kernel/locking/rwsem.c:1291 [inline]
__down_read kernel/locking/rwsem.c:1304 [inline]
down_read+0x99/0x2e0 kernel/locking/rwsem.c:1570
filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
page_cache_ra_order+0x37a/0xe80 mm/readahead.c:497
do_sync_mmap_readahead+0x6ad/0x8e0 mm/filemap.c:3406
filemap_fault+0x703/0x1300 mm/filemap.c:3555
__do_fault+0x138/0x2a0 mm/memory.c:5474
do_shared_fault mm/memory.c:5973 [inline]
do_fault mm/memory.c:6047 [inline]
do_pte_missing+0x601/0x33f0 mm/memory.c:4566
handle_pte_fault mm/memory.c:6427 [inline]
__handle_mm_fault mm/memory.c:6565 [inline]
handle_mm_fault+0x1bd9/0x3170 mm/memory.c:6734
do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f0ceb4664a7
RSP: 002b:00007f0ceb93fb70 EFLAGS: 00010246
RAX: 0000200000000040 RBX: 0000000000000002 RCX: 0000000000000000
RDX: e7bb5a000dd8c5fe RSI: 0000000000000002 RDI: 000055557ec9f3d8
RBP: 00007f0ceb93fc90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 00007f0ceb93fcd0
R13: 00007f0ceb81609c R14: 000000000010f2fb R15: 00007f0ceb816090
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e95cca0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e95cca0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e95cca0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5383:
#0: ffff8880376e80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:7/15205:
#0: ffff88813fe43140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline]
#0: ffff88813fe43140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397
#1: ffffc9000e007c40 (xfrm_state_gc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline]
#1: ffffc9000e007c40 (xfrm_state_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397
#2: ffffffff8e962fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#2: ffffffff8e962fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
3 locks held by kworker/1:2/15213:
#0: ffff8880b863aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb6/0x150 kernel/sched/core.c:660
#1: ffff8880b8724588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
#2: ffff8880b8726118 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1004 [inline]
#2: ffff8880b8726118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30 kernel/time/timer.c:1085
2 locks held by syz.2.2973/17554:
1 lock held by syz-executor/18669:
1 lock held by syz.6.3133/19137:
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x37a/0xe80 mm/readahead.c:497
1 lock held by syz.3.3184/19530:
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x37a/0xe80 mm/readahead.c:497
1 lock held by syz.3.3184/19531:
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
#0: ffff888023169500 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x37a/0xe80 mm/readahead.c:497
2 locks held by dhcpcd/20270:
#0: ffff88802b32e840 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff88802b32e840 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: __sock_release net/socket.c:721 [inline]
#0: ffff88802b32e840 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1514
#1: ffffffff8e962fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8e962fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
4 locks held by dhcpcd-run-hook/20884:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd3/0x1030 kernel/hung_task.c:561
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20885 Comm: sed Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:pmdp_get include/linux/pgtable.h:468 [inline]
RIP: 0010:pmdp_get_lockless include/linux/pgtable.h:755 [inline]
RIP: 0010:__pte_offset_map+0xe3/0x240 mm/pgtable-generic.c:292
Code: c2 40 4b da 8b e8 6d e8 84 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 4d eb 13 00 <4d> 8b 2e 4c 89 2c 24 4d 85 ff 74 20 e8 4c ad a8 ff 4c 89 f8 48 c1
RSP: 0018:ffffc900033af2e8 EFLAGS: 00000246
RAX: 1ffff11013d4c7ff RBX: 00007fffffffe000 RCX: ffff88807b00dc40
RDX: 0000000000000000 RSI: ffffffff8c28b640 RDI: ffffffff8c28b600
RBP: 0000000000000001 R08: ffffffff821d1679 R09: ffffffff8e95cca0
R10: ffffc900033af600 R11: fffff52000675ec5 R12: dffffc0000000000
R13: ffff8880268e5500 R14: ffff88809ea63ff8 R15: ffffc900033af358
FS: 0000000000000000(0000) GS:ffff888125389000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556f2588b950 CR3: 00000000a58b2000 CR4: 00000000003526f0
DR0: 0000000000000101 DR1: 0000000000000007 DR2: 000000000000000f
DR3: 0000000000000006 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
pte_offset_map_lock+0x46/0x210 mm/pgtable-generic.c:400
change_pte_range mm/mprotect.c:332 [inline]
change_pmd_range mm/mprotect.c:537 [inline]
change_pud_range mm/mprotect.c:600 [inline]
change_p4d_range mm/mprotect.c:626 [inline]
change_protection_range mm/mprotect.c:654 [inline]
change_protection+0x1354/0x4c70 mm/mprotect.c:688
mprotect_fixup+0x83e/0xb60 mm/mprotect.c:807
setup_arg_pages+0x664/0xbd0 fs/exec.c:670
load_elf_binary+0xc5e/0x2980 fs/binfmt_elf.c:1028
search_binary_handler fs/exec.c:1664 [inline]
exec_binprm fs/exec.c:1696 [inline]
bprm_execve+0x94a/0x1510 fs/exec.c:1748
do_execveat_common+0x50d/0x690 fs/exec.c:1846
__do_sys_execve fs/exec.c:1930 [inline]
__se_sys_execve fs/exec.c:1924 [inline]
__x64_sys_execve+0x97/0xc0 fs/exec.c:1924
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f873fb87107
Code: Unable to access opcode bytes at 0x7f873fb870dd.
RSP: 002b:00007ffeed39ff78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000556f2589c080 RCX: 00007f873fb87107
RDX: 0000556f2589c0a8 RSI: 0000556f2589c080 RDI: 0000556f2589c138
RBP: 0000556f2589c138 R08: 00007ffeed3a3e88 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000556f2589c0a8
R13: 00007f873fd4ce8b R14: 0000556f2589c0a8 R15: 0000000000000000