INFO: task syz.1.99:7111 blocked for more than 143 seconds.
Not tainted 6.16.0-rc5-syzkaller-g733923397fd9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.99 state:D stack:28216 pid:7111 tgid:7110 ppid:6662 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5401 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6790
__schedule_loop kernel/sched/core.c:6868 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6883
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6940
rwsem_down_read_slowpath+0x62f/0xb60 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xef/0x480 kernel/locking/rwsem.c:1526
i_mmap_lock_read include/linux/fs.h:567 [inline]
__rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
rmap_walk_file+0x174/0x1f0 mm/rmap.c:2930
rmap_walk+0x7a/0xd0 mm/rmap.c:2941
remove_migration_ptes+0x11d/0x1b0 mm/migrate.c:366
unmap_and_move_huge_page mm/migrate.c:1459 [inline]
migrate_hugetlbs mm/migrate.c:1581 [inline]
migrate_pages+0xa34/0x23b0 mm/migrate.c:2011
do_mbind+0x6f0/0xf30 mm/mempolicy.c:1542
kernel_mbind+0x1e3/0x1f0 mm/mempolicy.c:1685
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea0278cda9
RSP: 002b:00007fea019fe038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007fea029a5fa0 RCX: 00007fea0278cda9
RDX: 0000000100000000 RSI: 0000000100000004 RDI: 0000000000000000
RBP: 00007fea0280e2a0 R08: 0000000000000006 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fea029a5fa0 R15: 00007ffd3dbcf498
INFO: task syz.1.99:7118 blocked for more than 143 seconds.
Not tainted 6.16.0-rc5-syzkaller-g733923397fd9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.99 state:D stack:28504 pid:7118 tgid:7110 ppid:6662 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5401 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6790
__schedule_loop kernel/sched/core.c:6868 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6883
io_schedule+0xbf/0x130 kernel/sched/core.c:7728
folio_wait_bit_common+0x3d6/0x9e0 mm/filemap.c:1317
__folio_lock mm/filemap.c:1675 [inline]
folio_lock include/linux/pagemap.h:1114 [inline]
folio_lock include/linux/pagemap.h:1110 [inline]
__filemap_get_folio+0x774/0xc30 mm/filemap.c:1928
filemap_lock_folio include/linux/pagemap.h:785 [inline]
filemap_lock_hugetlb_folio include/linux/hugetlb.h:817 [inline]
hugetlbfs_zero_partial_page+0xaf/0x590 fs/hugetlbfs/inode.c:658
hugetlbfs_punch_hole fs/hugetlbfs/inode.c:699 [inline]
hugetlbfs_fallocate+0xf81/0x12e0 fs/hugetlbfs/inode.c:745
vfs_fallocate+0x608/0x10c0 fs/open.c:341
madvise_remove mm/madvise.c:1043 [inline]
madvise_vma_behavior+0x21ca/0x2420 mm/madvise.c:1274
madvise_walk_vmas+0x1ce/0x2c0 mm/madvise.c:1541
madvise_do_behavior+0x15d/0x3f0 mm/madvise.c:1733
do_madvise+0x161/0x230 mm/madvise.c:1826
__do_sys_madvise mm/madvise.c:1835 [inline]
__se_sys_madvise mm/madvise.c:1833 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:1833
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea0278cda9
RSP: 002b:00007fea019dd038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fea029a6080 RCX: 00007fea0278cda9
RDX: 0000000000000009 RSI: 0000000000800034 RDI: 0000000000108000
RBP: 00007fea0280e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fea029a6080 R15: 00007ffd3dbcf498
INFO: task syz.1.99:7124 blocked for more than 144 seconds.
Not tainted 6.16.0-rc5-syzkaller-g733923397fd9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.99 state:D stack:29288 pid:7124 tgid:7110 ppid:6662 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5401 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6790
__schedule_loop kernel/sched/core.c:6868 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6883
io_schedule+0xbf/0x130 kernel/sched/core.c:7728
migration_entry_wait_on_locked+0x751/0x8c0 mm/filemap.c:1439
migration_entry_wait_huge+0x2f0/0x450 mm/migrate.c:429
hugetlb_fault+0x22ff/0x3070 mm/hugetlb.c:6740
handle_mm_fault+0xbfa/0xd10 mm/memory.c:6379
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x147/0x2e0 lib/strncpy_from_user.c:130
Code: 00 00 4d 89 74 1d 00 48 83 ed 08 bf 07 00 00 00 48 83 c3 08 48 89 ee e8 e7 02 b1 fc 48 83 fd 07 76 22 e8 6c 07 b1 fc 45 31 ff <49> 8b 04 1c 31 ff 44 89 fe 49 89 c6 e8 98 02 b1 fc 45 85 ff 0f 84
RSP: 0018:ffffc9000aa57d10 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff850a5b66
RDX: ffff8880314e9e00 RSI: ffffffff850a5c04 RDI: 0000000000000007
RBP: 0000000000000fe0 R08: 0000000000000007 R09: 0000000000000007
R10: 0000000000000fe0 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880307da220 R14: 0000000000000fe0 R15: 0000000000000000
getname_flags.part.0+0x8f/0x550 fs/namei.c:157
getname_flags+0x93/0xf0 include/linux/audit.h:322
getname include/linux/fs.h:2907 [inline]
do_sys_openat2+0xb8/0x1d0 fs/open.c:1431
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea0278cda9
RSP: 002b:00007fea019bc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fea029a6160 RCX: 00007fea0278cda9
RDX: 0000000000000062 RSI: 0000000000000000 RDI: ffffffffffffff9c
RBP: 00007fea0280e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fea029a6160 R15: 00007ffd3dbcf498
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c4d00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c4d00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c4d00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
2 locks held by getty/5612:
#0: ffff8880356a20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900036d32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
1 lock held by syz.1.99/7111:
#0: ffff888056c48e38 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:567 [inline]
#0: ffff888056c48e38 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: __rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
3 locks held by syz.1.99/7118:
#0: ffff888144ebe428 (sb_writers#12){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1043 [inline]
#0: ffff888144ebe428 (sb_writers#12){.+.+}-{0:0}, at: madvise_vma_behavior+0x21ca/0x2420 mm/madvise.c:1274
#1: ffff888056c48b68 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#1: ffff888056c48b68 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:687 [inline]
#1: ffff888056c48b68 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xce6/0x12e0 fs/hugetlbfs/inode.c:745
#2: ffff888056c48e38 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:547 [inline]
#2: ffff888056c48e38 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:695 [inline]
#2: ffff888056c48e38 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xd5d/0x12e0 fs/hugetlbfs/inode.c:745
1 lock held by syz.1.99/7124:
#0: ffff888022360be0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:431 [inline]
#0: ffff888022360be0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:188 [inline]
#0: ffff888022360be0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/mmap_lock.c:248
1 lock held by syz.0.4459/18027:
#0: ffffffff8e5d02f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x284/0x3c0 kernel/rcu/tree_exp.h:304
1 lock held by syz.4.4458/18022:
#0: ffffffff8e5d02f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:336
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-g733923397fd9 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: kworker/u8:3 Not tainted 6.16.0-rc5-syzkaller-g733923397fd9 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:iret_to_self arch/x86/include/asm/sync_core.h:26 [inline]
RIP: 0010:sync_core arch/x86/include/asm/sync_core.h:88 [inline]
RIP: 0010:do_sync_core+0x29/0x40 arch/x86/kernel/alternative.c:2686
Code: 90 f3 0f 1e fa e8 e7 46 5c 00 eb 10 cc cc cc e8 dd 46 5c 00 0f 01 e8 e9 d5 46 5c 00 e8 d0 46 5c 00 8c d0 50 54 48 83 04 24 08 <9c> 8c c8 50 68 b4 1c 5f 81 48 cf e9 b7 46 5c 00 0f 1f 80 00 00 00
RSP: 0018:ffffc90000ad7888 EFLAGS: 00000082
RAX: 0000000000000018 RBX: 0000000000000001 RCX: ffffffff81af3011
RDX: ffff888140aa9e00 RSI: ffffffff815f1ca0 RDI: 0000000000000000
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed10170a7fec
R13: 0000000000000000 R14: ffffffff815f1c80 R15: ffff8880b843b6c0
FS: 0000000000000000(0000) GS:ffff888124721000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555582466588 CR3: 000000000e382000 CR4: 00000000003526f0
Call Trace:
csd_do_func kernel/smp.c:134 [inline]
smp_call_function_many_cond+0xef9/0x1510 kernel/smp.c:876
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline]
smp_text_poke_batch_finish+0x5ae/0xdb0 arch/x86/kernel/alternative.c:2963
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x376/0x550 kernel/jump_label.c:919
static_key_disable_cpuslocked+0x158/0x1c0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate mm/kfence/core.c:855 [inline]
toggle_allocation_gate+0x145/0x280 mm/kfence/core.c:842
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245