INFO: task syz.2.3389:20759 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.2.3389 state:D stack:26712 pid:20759 tgid:20759 ppid:5610 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
rwsem_down_read_slowpath+0x5af/0xb40 kernel/locking/rwsem.c:1114
__down_read_common kernel/locking/rwsem.c:1291 [inline]
__down_read kernel/locking/rwsem.c:1304 [inline]
down_read+0xed/0x4c0 kernel/locking/rwsem.c:1576
filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
do_sync_mmap_readahead mm/filemap.c:3428 [inline]
filemap_fault+0x1943/0x3130 mm/filemap.c:3582
__do_fault+0x10b/0x440 mm/memory.c:5425
do_shared_fault mm/memory.c:5924 [inline]
do_fault+0x2db/0x1750 mm/memory.c:5998
do_pte_missing mm/memory.c:4566 [inline]
handle_pte_fault mm/memory.c:6379 [inline]
__handle_mm_fault+0x187d/0x2a00 mm/memory.c:6517
handle_mm_fault+0x37b/0xa30 mm/memory.c:6686
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f1198a67565
RSP: 002b:00007ffdfc0aec30 EFLAGS: 00010246
RAX: 0000200000000200 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000008 RSI: 0000000000000000 RDI: 00005555916d63d8
RBP: 00007ffdfc0aed50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 00007ffdfc0aed90
R13: 00007f1198e25fac R14: 0000000000150821 R15: 00007f1198e25fa0
INFO: task syz.1.3393:20765 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3393 state:D stack:27144 pid:20765 tgid:20765 ppid:5609 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
rwsem_down_read_slowpath+0x5af/0xb40 kernel/locking/rwsem.c:1114
__down_read_common kernel/locking/rwsem.c:1291 [inline]
__down_read kernel/locking/rwsem.c:1304 [inline]
down_read+0xed/0x4c0 kernel/locking/rwsem.c:1576
filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
do_sync_mmap_readahead mm/filemap.c:3428 [inline]
filemap_fault+0x1943/0x3130 mm/filemap.c:3582
__do_fault+0x10b/0x440 mm/memory.c:5425
do_shared_fault mm/memory.c:5924 [inline]
do_fault+0x2db/0x1750 mm/memory.c:5998
do_pte_missing mm/memory.c:4566 [inline]
handle_pte_fault mm/memory.c:6379 [inline]
__handle_mm_fault+0x187d/0x2a00 mm/memory.c:6517
handle_mm_fault+0x37b/0xa30 mm/memory.c:6686
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fa511467565
RSP: 002b:00007ffdeab614a0 EFLAGS: 00010246
RAX: 0000200000000200 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000008 RSI: 0000000000000000 RDI: 000055555b0ca3d8
RBP: 00007ffdeab615c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 00007ffdeab61600
R13: 00007fa511825fac R14: 0000000000150946 R15: 00007fa511825fa0
Showing all locks held in the system:
3 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/30:
#0: ffffffff8ebe6180 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8ebe6180 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8ebe6180 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by getty/5371:
#0: ffff8880379710a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
2 locks held by syz.0.3340/20591:
#0: ffff88802456c168 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff88802456c168 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:882
#1: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline]
#1: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x273/0x440 block/fops.c:883
1 lock held by syz.2.3389/20759:
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
1 lock held by syz.1.3393/20765:
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
1 lock held by syz.6.3469/21223:
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
1 lock held by syz.5.3526/21462:
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff88802456c300 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x3b3/0xed0 mm/readahead.c:517
3 locks held by kworker/0:2H/21609:
4 locks held by syz.4.3741/22533:
=============================================
NMI backtrace for cpu 1
CPU: 1 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 06/10/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x21c/0x2a0 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
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: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: f6 8c 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c3 a9 11 00 fb f4 bc 48 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e807e10 EFLAGS: 00000246
RAX: 0000000007aa6ebb RBX: ffffffff8e891480 RCX: ffffffff8bb9f2d5
RDX: 0000000000000000 RSI: ffffffff8e1a4788 RDI: ffffffff8c401280
RBP: fffffbfff1d12290 R08: 0000000000000001 R09: ffffed101708678d
R10: ffff8880b8433c6b R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffffffff1d00fc6 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888123de7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000017038 CR3: 00000000328ef000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:768
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x3a7/0x5b0 kernel/sched/idle.c:355
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454
rest_init+0x251/0x260 init/main.c:717
start_kernel+0x48e/0x490 init/main.c:1175
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x158