INFO: task syz.4.2395:14677 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2395 state:D stack:24976 pid:14677 tgid:14676 ppid:7477 task_flags:0x400140 flags:0x08080002
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
io_schedule+0x8a/0xf0 kernel/sched/core.c:8154
folio_wait_bit_common+0x414/0xa70 mm/filemap.c:1323
folio_lock include/linux/pagemap.h:1157 [inline]
migrate_folio_unmap mm/migrate.c:1250 [inline]
migrate_pages_batch+0x7a1/0x45c0 mm/migrate.c:1907
migrate_pages_sync+0x4db/0x880 mm/migrate.c:2051
migrate_pages+0x1a83/0x2850 mm/migrate.c:2133
compact_zone+0x243c/0x4420 mm/compaction.c:2668
compact_node+0x17f/0x2c0 mm/compaction.c:2937
compact_nodes mm/compaction.c:2959 [inline]
sysctl_compaction_handler mm/compaction.c:3010 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2997
proc_sys_call_handler+0x47f/0x5a0 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
do_splice_from fs/splice.c:936 [inline]
direct_splice_actor+0x192/0x690 fs/splice.c:1159
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1228
do_sendfile+0xadc/0xe20 fs/read_write.c:1371
__do_compat_sys_sendfile fs/read_write.c:1447 [inline]
__se_compat_sys_sendfile fs/read_write.c:1436 [inline]
__ia32_compat_sys_sendfile+0x162/0x220 fs/read_write.c:1436
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf707efec
RSP: 002b:00000000f546d50c EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000000000009
RDX: 00000000800000c0 RSI: 0000000000000005 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/43:
#0: ffffffff8ebe5f00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8ebe5f00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8ebe5f00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
5 locks held by kworker/u33:7/1162:
2 locks held by getty/5543:
#0: ffff8880279fc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000019b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5728:
1 lock held by udevd/5758:
#0: ffff8880275cf350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:948
1 lock held by udevd/6539:
#0: ffff88802766b350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:948
2 locks held by kworker/u32:5/11239:
1 lock held by syz.4.2395/14677:
#0: ffff888026d2e450 (sb_writers#3){.+.+}-{0:0}, at: splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
1 lock held by syz.5.2979/16974:
4 locks held by syz.1.2982/16973:
1 lock held by syz.6.2983/16978:
#0: ffff88801bcd36b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:601 [inline]
#0: ffff88801bcd36b8 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:450 [inline]
#0: ffff88801bcd36b8 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x160/0x6f0 mm/mmap_lock.c:501
1 lock held by syz.6.2983/16979:
=============================================
NMI backtrace for cpu 3
CPU: 3 UID: 0 PID: 43 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
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 3 to CPUs 0-2:
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: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 26 90 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 eb 07 0f 00 2d 23 08 15 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: 0000:ffffffff8e807e10 EFLAGS: 00000206
RAX: 00000000027f22a3 RBX: ffffffff8e891480 RCX: ffffffff8bb692d5
RDX: 0000000000000000 RSI: ffffffff8e1a5a08 RDI: ffffffff8c400380
RBP: fffffbfff1d12290 R08: 0000000000000001 R09: ffffed100564678d
R10: ffff88802b233c6b R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffffffff1d00fc6 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888096bf2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000061070000 CR4: 0000000000352ef0
DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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
NMI backtrace for cpu 2
CPU: 2 UID: 0 PID: 16973 Comm: syz.1.2982 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline]
RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline]
RIP: 0010:native_x2apic_icr_write arch/x86/include/asm/apic.h:229 [inline]
RIP: 0010:__x2apic_send_IPI_dest arch/x86/kernel/apic/local.h:49 [inline]
RIP: 0010:x2apic_send_IPI+0x6a/0xa0 arch/x86/kernel/apic/x2apic_cluster.c:35
Code: ae f0 0f ae e8 89 f0 b9 00 0c 00 00 0d 00 08 00 00 83 fe 02 48 0f 44 c1 48 c1 e2 20 b9 30 08 00 00 48 09 d0 48 c1 ea 20 0f 30 <66> 90 48 83 c4 08 5b c3 cc cc cc cc 48 83 c4 08 31 d2 48 89 c6 bf
RSP: 0018:ffffc900046ef4e0 EFLAGS: 00000002
RAX: 00000002000008fd RBX: ffff88801c2d9484 RCX: 0000000000000830
RDX: 0000000000000002 RSI: 00000000000000fd RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2244b92
R10: ffffffff91225c97 R11: 0000000000000001 R12: 0000000000000004
R13: 1ffff920008ddea0 R14: ffffc900046ef520 R15: 0000000000000010
FS: 0000000000000000(0000) GS:ffff888096df2000(0063) knlGS:00000000f541cb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f51a69fb CR3: 000000005fd89000 CR4: 0000000000352ef0
DR0: 000000006000003f DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
arch_smp_send_reschedule arch/x86/include/asm/smp.h:90 [inline]
__resched_curr+0x2db/0x500 kernel/sched/core.c:1215
wakeup_preempt+0x1a0/0x400 kernel/sched/core.c:2288
ttwu_do_activate+0x1ad/0x800 kernel/sched/core.c:3825
ttwu_queue kernel/sched/core.c:4077 [inline]
try_to_wake_up+0xce0/0x1c90 kernel/sched/core.c:4415
autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:403
__wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:125 [inline]
__wake_up_sync_key+0x36/0x50 kernel/sched/wait.c:192
__unix_dgram_recvmsg+0x31a/0xc30 net/unix/af_unix.c:2607
unix_dgram_recvmsg+0xcd/0x100 net/unix/af_unix.c:2681
sock_recvmsg_nosec net/socket.c:1126 [inline]
____sys_recvmsg+0x5eb/0x670 net/socket.c:2902
___sys_recvmsg+0x16a/0x1a0 net/socket.c:2946
do_recvmmsg+0x54d/0x740 net/socket.c:3033
__sys_recvmmsg+0x21f/0x270 net/socket.c:3115
__do_compat_sys_recvmmsg_time32 net/compat.c:417 [inline]
__se_compat_sys_recvmmsg_time32 net/compat.c:413 [inline]
__ia32_compat_sys_recvmmsg_time32+0xc4/0x160 net/compat.c:413
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf704efec
Code: Unable to access opcode bytes at 0xf704efc2.
RSP: 002b:00000000f541c50c EFLAGS: 00000292 ORIG_RAX: 0000000000000151
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000040
RDX: 00000000080002c1 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16971 Comm: syz.1.2982 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0023:0xf708b2c2
Code: 00 00 8d b6 00 00 00 00 8b 72 f8 8b 5a fc 83 ea 08 89 e8 39 f1 19 d8 72 ef 39 54 24 08 73 39 8b 44 24 08 8b 4c 24 10 89 58 04 <8b> 5c 24 14 83 c0 08 89 70 f8 89 0a 89 7a 04 8b 38 8b 0b 8b 6b 04
RSP: 002b:00000000ff974540 EFLAGS: 00000297
RAX: 00000000f69af0b0 RBX: 00000000ffffffff RCX: 00000000897e12a2
RDX: 00000000f69b4dd8 RSI: 00000000897e122c RDI: 00000000ffffffff
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000 GS: 0000000056f5c480