INFO: task syz.3.1137:10097 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1137 state:D stack:25608 pid:10097 tgid:10097 ppid:5824 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
page_cache_ra_order+0x3a2/0xe70 mm/readahead.c:494
do_sync_mmap_readahead+0x66a/0x870 mm/filemap.c:3354
filemap_fault+0x6bc/0x12b0 mm/filemap.c:3503
__do_fault+0x138/0x390 mm/memory.c:5324
do_shared_fault mm/memory.c:5806 [inline]
do_fault mm/memory.c:5880 [inline]
do_pte_missing mm/memory.c:4405 [inline]
handle_pte_fault mm/memory.c:6221 [inline]
__handle_mm_fault+0x1842/0x5440 mm/memory.c:6363
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6532
do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f9a6b756b18
RSP: 002b:00007ffc12db24d8 EFLAGS: 00010206
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 00756d6d6f692f76
RDX: 000000000000000b RSI: 6d6f692f7665642f RDI: 0000200000000080
RBP: 00007f9a6b9e7da0 R08: 0000001b2fa20000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f9a6b9e609c
R13: 00007f9a6b9e6090 R14: fffffffffffffffe R15: 00007ffc12db25f0
INFO: task syz.3.1137:10098 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1137 state:D stack:26152 pid:10098 tgid:10097 ppid:5824 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
page_cache_ra_order+0x3a2/0xe70 mm/readahead.c:494
do_sync_mmap_readahead+0x66a/0x870 mm/filemap.c:3354
filemap_fault+0x6bc/0x12b0 mm/filemap.c:3503
__do_fault+0x138/0x390 mm/memory.c:5324
do_shared_fault mm/memory.c:5806 [inline]
do_fault mm/memory.c:5880 [inline]
do_pte_missing mm/memory.c:4405 [inline]
handle_pte_fault mm/memory.c:6221 [inline]
__handle_mm_fault+0x1842/0x5440 mm/memory.c:6363
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6532
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0x1650/0x29f0 mm/gup.c:1428
__get_user_pages_locked mm/gup.c:1692 [inline]
faultin_page_range+0x240/0x8d0 mm/gup.c:1912
madvise_populate mm/madvise.c:979 [inline]
madvise_do_behavior+0x2e7/0x550 mm/madvise.c:1883
do_madvise+0x1bc/0x270 mm/madvise.c:1978
__do_sys_madvise mm/madvise.c:1987 [inline]
__se_sys_madvise mm/madvise.c:1985 [inline]
__x64_sys_madvise+0xa7/0xc0 mm/madvise.c:1985
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a6b78eec9
RSP: 002b:00007f9a6c6e0038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f9a6b9e5fa0 RCX: 00007f9a6b78eec9
RDX: 0000000000000017 RSI: 0000000000c00000 RDI: 0000200000000000
RBP: 00007f9a6b811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a6b9e6038 R14: 00007f9a6b9e5fa0 R15: 00007ffc12db2378
Showing all locks held in the system:
2 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/31:
#0: ffffffff8e13d2e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13d2e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8e13d2e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
5 locks held by kworker/u8:6/2912:
2 locks held by getty/5584:
#0: ffff88814d1ad0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/u8:7/8446:
#0: ffff88803c05b148 ((wq_completion)loop6){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88803c05b148 ((wq_completion)loop6){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
#1: ffffc9000389fba0 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc9000389fba0 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
#2: ffff8880235587a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:995 [inline]
#2: ffff8880235587a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:804
2 locks held by syz.2.1121/10026:
#0: ffff8880235587a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#0: ffff8880235587a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x260/0x530 block/fops.c:911
#1: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1035 [inline]
#1: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x290/0x530 block/fops.c:912
1 lock held by syz.3.1137/10097:
#0: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
#0: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3a2/0xe70 mm/readahead.c:494
1 lock held by syz.3.1137/10098:
#0: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
#0: ffff888023558948 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3a2/0xe70 mm/readahead.c:494
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:338 [inline]
watchdog+0xfa9/0xff0 kernel/hung_task.c:501
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 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: 1138 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:local_lock_release include/linux/local_lock_internal.h:55 [inline]
RIP: 0010:crng_make_state+0x300/0x700 drivers/char/random.c:393
Code: eb 2d 4d 8d 7e 28 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 fe f7 04 fd 48 8b 44 24 20 49 39 07 0f 85 9b 01 00 00 0b 35 9f fc 49 8d 7e 28 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74
RSP: 0018:ffffc90003a1f720 EFLAGS: 00000046
RAX: ffff888026e28000 RBX: ffff8880b87363b0 RCX: 0000000000000000
RDX: ffff888026e28000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003a1f810 R08: ffffc90003a1f69f R09: 0000000000000000
R10: ffffc90003a1f660 R11: fffff52000743ed4 R12: dffffc0000000000
R13: ffff8880b8736390 R14: ffff8880b87363b8 R15: ffff8880b87363e0
FS: 0000000000000000(0000) GS:ffff888125e22000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc2aadb12f8 CR3: 000000000df38000 CR4: 00000000003526f0
DR0: ffffffffffffff99 DR1: 00000000000001f8 DR2: 0000000000010001
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
_get_random_bytes+0xd5/0x210 drivers/char/random.c:406
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:791 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x6ac/0xb80 drivers/net/netdevsim/dev.c:866
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245