INFO: task syz.1.5593:28663 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc2-syzkaller-00382-gdccbe2047a5b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.5593      state:D stack:27936 pid:28663 tgid:28662 ppid:25418  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
 nfsd_nl_version_set_doit+0xc5/0x7a0 fs/nfsd/nfsctl.c:1813
 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2542
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 __sys_sendmsg+0x16e/0x220 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7a9785d19
RSP: 002b:00007fa7aa649038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa7a9975fa0 RCX: 00007fa7a9785d19
RDX: 0000000000004010 RSI: 00000000200004c0 RDI: 0000000000000004
RBP: 00007fa7a9801a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa7a9975fa0 R15: 00007ffe36cd5a48
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-00382-gdccbe2047a5b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xf14/0x1240 kernel/hung_task.c:397
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31795 Comm: syz.1.6291 Not tainted 6.13.0-rc2-syzkaller-00382-gdccbe2047a5b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:rcu_is_watching+0x5/0xc0 kernel/rcu/tree.c:733
Code: 34 49 03 e9 51 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <53> 65 ff 05 6b bf 84 7e e8 3e 05 9b 09 48 c7 c3 68 7f 03 00 83 f8
RSP: 0018:ffffc900053ff330 EFLAGS: 00000247
RAX: 0000000000000001 RBX: 1ffff92000a7fe6a RCX: ffffffff81764799
RDX: fffffbfff2039b33 RSI: 0000000000000008 RDI: ffffffff901cd990
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2039b32
R10: ffffffff901cd997 R11: 0000000000000000 R12: ffff8880589801e0
R13: ffff888058980170 R14: 0000000000000001 R15: ffffc900053ffb80
FS:  00007fbd387b46c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000106b000 CR3: 0000000098a94000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x4e2/0x6f0 kernel/locking/lockdep.c:5860
 up_read+0x16/0x20 kernel/locking/rwsem.c:1619
 mmap_read_unlock include/linux/mmap_lock.h:171 [inline]
 __get_user_pages_locked mm/gup.c:1851 [inline]
 get_dump_page+0x1ea/0x230 mm/gup.c:2278
 dump_user_range+0x135/0x8c0 fs/coredump.c:943
 elf_core_dump+0x2787/0x3880 fs/binfmt_elf.c:2129
 do_coredump+0x2dd5/0x43e0 fs/coredump.c:758
 get_signal+0x23f3/0x2610 kernel/signal.c:3002
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 irqentry_exit_to_user_mode+0x13f/0x280 kernel/entry/common.c:231
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fbd3a985d19
Code: Unable to access opcode bytes at 0x7fbd3a985cef.
RSP: 002b:00007fbd387b3fe8 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 00007fbd3ab76400 RCX: 00007fbd3a985d19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000011
RBP: 00007fbd3aa01a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbd3ab76400 R15: 00007ffeb7348eb8
 </TASK>