INFO: task hwrng:753 blocked for more than 143 seconds. Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:hwrng state:D stack:28592 pid:753 tgid:753 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5399 [inline] __schedule+0x177f/0x4960 kernel/sched/core.c:6726 __schedule_loop kernel/sched/core.c:6801 [inline] schedule+0x149/0x260 kernel/sched/core.c:6816 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6873 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:752 hwrng_fillfn+0xe6/0x3c0 drivers/char/hw_random/core.c:504 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5092 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:__zone_watermark_ok+0x33b/0x3f0 Code: 8b 14 24 e9 61 fe ff ff 44 89 fe 48 c7 c7 c0 45 a1 8d e8 88 0c e0 02 48 b9 00 00 00 00 00 fc ff df 48 8b 14 24 e9 81 fe ff ff <31> c0 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 b0 01 eb ed f6 RSP: 0018:ffffc90003eced38 EFLAGS: 00000293 RAX: 1ffff11027fff5d8 RBX: 0000000000000901 RCX: dffffc0000000000 RDX: ffff88813fffae80 RSI: 0000000000000008 RDI: ffff88813fffb550 RBP: ffff88813fffaec0 R08: ffff88813fffb557 R09: 1ffff11027fff6aa R10: dffffc0000000000 R11: ffffed1027fff6ab R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 FS: 00005555563e5480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff0fb9fcf90 CR3: 0000000038d04000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: zone_watermark_fast+0x170/0x240 mm/page_alloc.c:3060 get_page_from_freelist+0x539/0x3570 mm/page_alloc.c:3253 __alloc_pages+0x255/0x680 mm/page_alloc.c:4560 __alloc_pages_bulk+0x729/0xd40 mm/page_alloc.c:4508 alloc_pages_bulk_array_mempolicy+0x685/0x840 mm/mempolicy.c:2296 vm_area_alloc_pages mm/vmalloc.c:3028 [inline] __vmalloc_area_node mm/vmalloc.c:3139 [inline] __vmalloc_node_range+0x798/0x14a0 mm/vmalloc.c:3320 __vmalloc_node mm/vmalloc.c:3385 [inline] vzalloc+0x79/0x90 mm/vmalloc.c:3458 alloc_counters+0xd7/0x760 net/ipv4/netfilter/ip_tables.c:799 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline] do_ipt_get_ctl+0xeca/0x1810 net/ipv4/netfilter/ip_tables.c:1660 nf_getsockopt+0x292/0x2c0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x21e/0x2e0 net/ipv4/ip_sockglue.c:1781 tcp_getsockopt+0x160/0x1c0 net/ipv4/tcp.c:4360 do_sock_getsockopt+0x36e/0x810 net/socket.c:2373 __sys_getsockopt+0x270/0x330 net/socket.c:2402 __do_sys_getsockopt net/socket.c:2412 [inline] __se_sys_getsockopt net/socket.c:2409 [inline] __x64_sys_getsockopt+0xb5/0xd0 net/socket.c:2409 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f7e3e87e8ca Code: c4 c1 e0 1a 0d 00 00 04 00 89 01 e9 e0 fe ff ff e8 3b 05 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 b0 ff ff ff f7 RSP: 002b:00007fffa834ad58 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fffa834ade0 RCX: 00007f7e3e87e8ca RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fffa834ad7c R09: 00007fffa834b197 R10: 00007fffa834ade0 R11: 0000000000000216 R12: 00007f7e3e97bd00 R13: 00007fffa834ad7c R14: 0000000000000000 R15: 00007f7e3e97dec0