INFO: task syz.0.890:8048 blocked for more than 143 seconds.
Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.890 state:D stack:27824 pid:8048 tgid:8046 ppid:5964 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1526
i_mmap_lock_read include/linux/fs.h:565 [inline]
rmap_walk_file+0x54b/0x690 mm/rmap.c:2694
rmap_walk+0x7a/0xd0 mm/rmap.c:2726
remove_migration_ptes+0x11e/0x1b0 mm/migrate.c:365
unmap_and_move_huge_page mm/migrate.c:1518 [inline]
migrate_hugetlbs mm/migrate.c:1640 [inline]
migrate_pages+0xa0e/0x2290 mm/migrate.c:2070
do_mbind+0x6cb/0xec0 mm/mempolicy.c:1394
kernel_mbind+0x1e8/0x200 mm/mempolicy.c:1537
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: 0033:0x7f293258cda9
RSP: 002b:00007f2933457038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007f29327a5fa0 RCX: 00007f293258cda9
RDX: 0000000100000000 RSI: 0000000100000004 RDI: 0000000000000000
RBP: 00007f293260e2a0 R08: 0000000000000006 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f29327a5fa0 R15: 00007fff9e1c28f8
INFO: task syz.0.890:8056 blocked for more than 143 seconds.
Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.890 state:D stack:28624 pid:8056 tgid:8046 ppid:5964 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
io_schedule+0xbf/0x130 kernel/sched/core.c:7689
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1318
__folio_lock mm/filemap.c:1665 [inline]
folio_lock include/linux/pagemap.h:1163 [inline]
folio_lock include/linux/pagemap.h:1159 [inline]
__filemap_get_folio+0x77c/0xbd0 mm/filemap.c:1918
filemap_lock_folio include/linux/pagemap.h:800 [inline]
filemap_lock_hugetlb_folio include/linux/hugetlb.h:790 [inline]
hugetlbfs_zero_partial_page+0xaf/0x520 fs/hugetlbfs/inode.c:656
hugetlbfs_punch_hole fs/hugetlbfs/inode.c:697 [inline]
hugetlbfs_fallocate+0xe70/0x11b0 fs/hugetlbfs/inode.c:743
vfs_fallocate+0x60d/0x10d0 fs/open.c:338
madvise_remove mm/madvise.c:1025 [inline]
madvise_vma_behavior+0x1c8b/0x1dd0 mm/madvise.c:1260
madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1502
do_madvise+0x366/0x7c0 mm/madvise.c:1689
__do_sys_madvise mm/madvise.c:1705 [inline]
__se_sys_madvise mm/madvise.c:1703 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:1703
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: 0033:0x7f293258cda9
RSP: 002b:00007f2933436038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f29327a6080 RCX: 00007f293258cda9
RDX: 0000000000000009 RSI: 0000000000800034 RDI: 0000000000108000
RBP: 00007f293260e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f29327a6080 R15: 00007fff9e1c28f8
INFO: task syz.0.890:8058 blocked for more than 144 seconds.
Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.890 state:D stack:28624 pid:8058 tgid:8046 ppid:5964 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
io_schedule+0xbf/0x130 kernel/sched/core.c:7689
migration_entry_wait_on_locked+0x70a/0x880 mm/filemap.c:1440
migration_entry_wait_huge+0x2e4/0x3f0 mm/migrate.c:428
hugetlb_fault+0x238d/0x2fa0 mm/hugetlb.c:6427
handle_mm_fault+0x930/0xaa0 mm/memory.c:6199
do_user_addr_fault+0x7a3/0x13f0 arch/x86/mm/fault.c:1389
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: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x148/0x2d0 lib/strncpy_from_user.c:130
Code: 00 00 48 83 ed 08 4d 89 74 1d 00 bf 07 00 00 00 48 83 c3 08 48 89 ee e8 d6 46 cd fc 48 83 fd 07 76 22 e8 9b 4b cd fc 45 31 ff <49> 8b 04 1c 31 ff 44 89 fe 49 89 c6 e8 87 46 cd fc 45 85 ff 0f 84
RSP: 0018:ffffc900015d7d18 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff84eb8f86
RDX: ffff888034a5da00 RSI: ffffffff84eb9025 RDI: 0000000000000007
RBP: 0000000000000fe0 R08: 0000000000000007 R09: 0000000000000007
R10: 0000000000000fe0 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88805e079120 R14: 0000000000000fe0 R15: 0000000000000000
getname_flags.part.0+0x8f/0x550 fs/namei.c:150
getname_flags include/linux/audit.h:322 [inline]
getname+0x8d/0xe0 fs/namei.c:223
do_sys_openat2+0x104/0x1e0 fs/open.c:1421
do_sys_open fs/open.c:1442 [inline]
__do_sys_openat fs/open.c:1458 [inline]
__se_sys_openat fs/open.c:1453 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1453
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: 0033:0x7f293258cda9
RSP: 002b:00007f2933415038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f29327a6160 RCX: 00007f293258cda9
RDX: 0000000000000062 RSI: 0000000000000000 RDI: ffffffffffffff9c
RBP: 00007f293260e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f29327a6160 R15: 00007fff9e1c28f8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:5/83:
#0: ffff8880b863ed18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
#1: ffff8880b8628a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
#2: ffff8880b862a518 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12f/0x1e0 kernel/time/timer.c:1046
2 locks held by kworker/u8:8/2967:
2 locks held by getty/5592:
#0: ffff888034c290a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.0.890/8048:
#0: ffff8880253e4928 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:565 [inline]
#0: ffff8880253e4928 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: rmap_walk_file+0x54b/0x690 mm/rmap.c:2694
3 locks held by syz.0.890/8056:
#0: ffff888022eb8420 (sb_writers#13){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1025 [inline]
#0: ffff888022eb8420 (sb_writers#13){.+.+}-{0:0}, at: madvise_vma_behavior+0x1c8b/0x1dd0 mm/madvise.c:1260
#1: ffff8880253e4658 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline]
#1: ffff8880253e4658 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:685 [inline]
#1: ffff8880253e4658 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xc0b/0x11b0 fs/hugetlbfs/inode.c:743
#2: ffff8880253e4928 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:545 [inline]
#2: ffff8880253e4928 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:693 [inline]
#2: ffff8880253e4928 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xc78/0x11b0 fs/hugetlbfs/inode.c:743
1 lock held by syz.0.890/8058:
#0: ffff888031ccc7e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline]
#0: ffff888031ccc7e0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6238 [inline]
#0: ffff888031ccc7e0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/memory.c:6298
1 lock held by syz.1.5048/17859:
#0: ffff88807fd7dd68 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:565 [inline]
#0: ffff88807fd7dd68 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: rmap_walk_file+0x54b/0x690 mm/rmap.c:2694
3 locks held by syz.1.5048/17865:
#0: ffff888022eb8420 (sb_writers#13){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1025 [inline]
#0: ffff888022eb8420 (sb_writers#13){.+.+}-{0:0}, at: madvise_vma_behavior+0x1c8b/0x1dd0 mm/madvise.c:1260
#1: ffff88807fd7da98 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline]
#1: ffff88807fd7da98 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:685 [inline]
#1: ffff88807fd7da98 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xc0b/0x11b0 fs/hugetlbfs/inode.c:743
#2: ffff88807fd7dd68 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:545 [inline]
#2: ffff88807fd7dd68 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:693 [inline]
#2: ffff88807fd7dd68 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xc78/0x11b0 fs/hugetlbfs/inode.c:743
1 lock held by syz.1.5048/17868:
#0: ffff88807fe4efe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline]
#0: ffff88807fe4efe0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6238 [inline]
#0: ffff88807fe4efe0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/memory.c:6298
1 lock held by syz.4.5287/18477:
#0: ffffffff8e1c74f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
1 lock held by syz.3.5288/18480:
#0: ffffffff8e1c74f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:236 [inline]
watchdog+0xf62/0x12b0 kernel/hung_task.c:399
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
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: 2967 Comm: kworker/u8:8 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:313
Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff
RSP: 0018:ffffc90000007e90 EFLAGS: 00000042
RAX: 0000000000010203 RBX: ffff8880b862c680 RCX: ffffffff81a6163a
RDX: ffff888030709e00 RSI: 0000000000000000 RDI: 000000000000001f
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000004 R12: 0000000000000001
R13: ffff8880b862c680 R14: dffffc0000000000 R15: 7fffffffffffffff
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000098 CR3: 00000000332a0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__next_base kernel/time/hrtimer.c:488 [inline]
__hrtimer_next_event_base+0x88/0x280 kernel/time/hrtimer.c:504
__hrtimer_get_next_event kernel/time/hrtimer.c:581 [inline]
hrtimer_update_next_event+0x1c2/0x2a0 kernel/time/hrtimer.c:606
hrtimer_interrupt+0x39a/0x8e0 kernel/time/hrtimer.c:1867
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x3e5/0x6f0 kernel/locking/lockdep.c:5859
Code: 7e 83 f8 01 0f 85 fe 01 00 00 9c 58 f6 c4 02 0f 85 e9 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 8b 84 24 88
RSP: 0018:ffffc9000bf47ad0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920017e8f5c RCX: ffffc9000bf47b20
RDX: 1ffff110060e151c RSI: ffffffff8b6ce8c0 RDI: ffffffff8bd2c380
RBP: 814e844e1e2ab423 R08: 0000000000000000 R09: fffffbfff20bf8a2
R10: ffffffff905fc517 R11: 0000000000000004 R12: 0000000000000004
R13: 0000000000000005 R14: ffff88803070a8e8 R15: ffff888030709e00
__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]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x8de/0xd20 drivers/net/netdevsim/dev.c:851
process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244