INFO: task syz.0.16:6504 blocked for more than 143 seconds.
Not tainted 6.15.0-syzkaller-11317-g2043ae9019e0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:23368 pid:6504 tgid:6503 ppid:6411 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:882 [inline]
blkdev_write_iter+0x50b/0x710 block/fops.c:778
iter_file_splice_write+0x937/0x1000 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0xfe/0x160 fs/splice.c:1158
splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x181/0x270 fs/splice.c:1227
do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1431 [inline]
__se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa77378e169
RSP: 002b:00007fa7746dd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa7739b5fa0 RCX: 00007fa77378e169
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007fa773810a68 R08: 0000000000000000 R09: 0000000000000000
R10: 000400000000003f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa7739b5fa0 R15: 00007ffcd4e89508
Showing all locks held in the system:
3 locks held by kworker/0:1/10:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5585:
#0: ffff88814caea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036c32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz.0.16/6504:
#0: ffff888024311ea0 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:882 [inline]
#0: ffff888024311ea0 (&sb->s_type->i_mutex_key#7){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778
3 locks held by syz.0.16/6506:
2 locks held by sed/14536:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-syzkaller-11317-g2043ae9019e0 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 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: 14541 Comm: syz-executor Not tainted 6.15.0-syzkaller-11317-g2043ae9019e0 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:page_table_check_set+0x2f6/0x730 mm/page_table_check.c:120
Code: be 04 00 00 00 e8 9a db f4 ff 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 55 01 00 00 44 8b 3b <31> ff 44 89 fe e8 60 8b 93 ff 45 85 ff 0f 85 5e 02 00 00 48 8d 7b
RSP: 0000:ffffc900038bf938 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801e63a1d8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88801e63a1d8
RBP: ffff88801e63a190 R08: ffff88801e63a1db R09: 1ffff11003cc743b
R10: dffffc0000000000 R11: ffffed1003cc743c R12: 0000000000000001
R13: 0000000000000000 R14: 000000000007f205 R15: 0000000000000000
FS: 0000555579807500(0000) GS:ffff888125c91000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec23996150 CR3: 0000000027f64000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
set_ptes include/linux/pgtable.h:292 [inline]
set_pte_range+0x6a5/0x700 mm/memory.c:5350
filemap_map_order0_folio mm/filemap.c:3692 [inline]
filemap_map_pages+0xf29/0x1740 mm/filemap.c:3746
do_fault_around mm/memory.c:5568 [inline]
do_read_fault mm/memory.c:5601 [inline]
do_fault mm/memory.c:5744 [inline]
do_pte_missing mm/memory.c:4251 [inline]
handle_pte_fault mm/memory.c:6089 [inline]
__handle_mm_fault+0x3687/0x5620 mm/memory.c:6232
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6401
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fec23996150
Code: Unable to access opcode bytes at 0x7fec23996126.
RSP: 002b:00007ffd312c1c68 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fec23b83ca0
RDX: 0000000000000000 RSI: 00007fec23b83ca0 RDI: 00007ffd312c1c70
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555798077d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000004f49b R15: 00007ffd312c1e00