INFO: task syz-executor.4:8296 blocked for more than 143 seconds.
Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28768 pid:8296 ppid:3655 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5191 [inline]
__schedule+0xae9/0x53f0 kernel/sched/core.c:6503
schedule+0xda/0x1b0 kernel/sched/core.c:6579
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
io_wq_exit_workers io_uring/io-wq.c:1253 [inline]
io_wq_put_and_exit+0x243/0xe20 io_uring/io-wq.c:1288
io_uring_clean_tctx+0x113/0x174 io_uring/tctx.c:193
io_uring_cancel_generic+0x5aa/0x602 io_uring/io_uring.c:3015
io_uring_files_cancel include/linux/io_uring.h:51 [inline]
do_exit+0x533/0x2a20 kernel/exit.c:775
do_group_exit+0xd0/0x2a0 kernel/exit.c:950
get_signal+0x21a1/0x2430 kernel/signal.c:2858
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c4dc8b5a9
RSP: 002b:00007f5c4e9d4218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f5c4ddac058 RCX: 00007f5c4dc8b5a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5c4ddac058
RBP: 00007f5c4ddac050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c4ddac05c
R13: 00007f5c4decfb1f R14: 00007f5c4e9d4300 R15: 0000000000022000
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc71/0xfc0 kernel/hung_task.c:377
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8656 Comm: iou-wrk-8652 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline]
RIP: 0010:arch_atomic_long_read include/linux/atomic/atomic-long.h:29 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:1266 [inline]
RIP: 0010:zone_managed_pages include/linux/mmzone.h:895 [inline]
RIP: 0010:managed_zone include/linux/mmzone.h:1312 [inline]
RIP: 0010:lruvec_lru_size mm/vmscan.c:610 [inline]
RIP: 0010:get_scan_count mm/vmscan.c:2981 [inline]
RIP: 0010:shrink_lruvec+0x35c/0x26d0 mm/vmscan.c:5855
Code: be 08 00 00 00 e8 c4 d0 1c 00 4d 8d 3c 2c 48 b9 00 00 00 00 00 fc ff df 49 8d bf 88 00 00 00 48 89 f8 48 c1 e8 03 80 3c 08 00 <0f> 85 39 1f 00 00 4d 8b bf 88 00 00 00 31 ff 4c 89 fe e8 ed 79 d0
RSP: 0018:ffffc9000351f290 EFLAGS: 00000246
RAX: 1ffff11047ffefd1 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: ffffed1047ffefd2 RSI: 0000000000000008 RDI: ffff88823fff7e88
RBP: 0000000000000e00 R08: 0000000000000000 R09: ffff88823fff7e8f
R10: ffffed1047ffefd1 R11: 0000000000000001 R12: ffff88823fff7000
R13: 0000000000000002 R14: ffff8881474383d8 R15: ffff88823fff7e00
FS: 00007f3ed7bd5700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96fd6d32c0 CR3: 000000008ea4c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
shrink_node_memcgs mm/vmscan.c:6074 [inline]
shrink_node+0x8d2/0x1f30 mm/vmscan.c:6105
shrink_zones mm/vmscan.c:6343 [inline]
do_try_to_free_pages+0x3b4/0x17a0 mm/vmscan.c:6405
try_to_free_mem_cgroup_pages+0x3a0/0xa70 mm/vmscan.c:6720
try_charge_memcg+0x464/0x12f0 mm/memcontrol.c:2681
obj_cgroup_charge_pages mm/memcontrol.c:3095 [inline]
__memcg_kmem_charge_page+0x16a/0x3b0 mm/memcontrol.c:3121
__alloc_pages+0x1ef/0x5a0 mm/page_alloc.c:5571
alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285
io_refill_buffer_cache io_uring/kbuf.c:379 [inline]
io_add_buffers io_uring/kbuf.c:405 [inline]
io_provide_buffers+0x87d/0xff0 io_uring/kbuf.c:457
io_issue_sqe+0x153/0x1210 io_uring/io_uring.c:1739
io_wq_submit_work+0x299/0x14e0 io_uring/io_uring.c:1816
io_worker_handle_work+0x5f4/0x1590 io_uring/io-wq.c:587
io_wqe_worker+0x9e1/0xe30 io_uring/io-wq.c:632
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306