syzbot


INFO: task hung in nfnetlink_rcv_msg (3)

Status: upstream: reported C repro on 2022/11/28 21:46
Reported-by: syzbot+9204e7399656300bf271@syzkaller.appspotmail.com
Fix commit: 5e29dc36bd5e netfilter: ipset: Rework long task execution when adding/deleting entries
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 73d, last: 58d

Cause bisection: introduced by (bisect log) :
commit 5f7b51bf09baca8e4f80cbe879536842bafb5f31
Author: Jozsef Kadlecsik <kadlec@netfilter.org>
Date: Wed Jul 28 15:01:15 2021 +0000

  netfilter: ipset: Limit the maximal range of consecutive elements to add/delete

Crash: INFO: task hung in nfnetlink_rcv_msg (log)
Repro: C syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in nfnetlink_rcv_msg 30 816d 1125d 0/24 auto-closed as invalid on 2021/03/11 10:49
upstream INFO: task hung in nfnetlink_rcv_msg (2) 1 453d 453d 0/24 auto-closed as invalid on 2022/02/07 23:39
Last patch testing requests:
Created Duration User Patch Repo Result
2022/11/29 02:04 13m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git 08e8a949f684 report log

Sample crash report:
INFO: task syz-executor297:3636 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor297 state:D stack:27952 pid:3636  ppid:3632   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 00007fff9090af40 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>
INFO: task syz-executor297:3638 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor297 state:D stack:27688 pid:3638  ppid:3635   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 00007fff9090af40 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>
INFO: task syz-executor297:3639 blocked for more than 144 seconds.
      Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor297 state:D stack:27952 pid:3639  ppid:3633   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 00007fff9090af40 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>
INFO: task syz-executor297:3640 blocked for more than 144 seconds.
      Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor297 state:D stack:27952 pid:3640  ppid:3637   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 00007fff9090af40 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>
INFO: task syz-executor297:3641 blocked for more than 144 seconds.
      Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor297 state:D stack:27488 pid:3641  ppid:3634   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 00007fff9090af40 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c58f070 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c58ed70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
2 locks held by kworker/0:1/14:
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888012066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
 #1: ffffc90000137da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
1 lock held by khungtaskd/28:
 #0: ffffffff8c58fbc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by syslogd/2978:
2 locks held by getty/3308:
 #0: ffff88814b3d0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor297/3631:
1 lock held by syz-executor297/3636:
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
1 lock held by syz-executor297/3638:
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
1 lock held by syz-executor297/3639:
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
1 lock held by syz-executor297/3640:
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
1 lock held by syz-executor297/3641:
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:97 [inline]
 #0: ffffffff91d49cb8 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xaae/0x1430 net/netfilter/nfnetlink.c:294
2 locks held by dhcpcd/3661:
 #0: ffff88806f429410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
 #0: ffff88806f429410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
 #1: ffffffff8c59a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
 #1: ffffffff8c59a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x5df/0x780 kernel/rcu/tree_exp.h:946

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x333/0x3c0 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+0xc75/0xfc0 kernel/hung_task.c:377
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3631 Comm: syz-executor297 Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 76 96 86 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be a8 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 8b 05 75 61 82 7e 89 c1 48 8b 34 24 81 e1 00 01 00
RSP: 0018:ffffc90003b8f000 EFLAGS: 00000287
RAX: 0000000000000000 RBX: 00000000fff00000 RCX: ffffffff881875a6
RDX: ffff88802303d7c0 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000000000c R08: 0000000000000004 R09: 000000001ed00000
R10: 000000001ede0210 R11: 0000000000000000 R12: ffffffff8b639c90
R13: 000000001ede0210 R14: dffffc0000000000 R15: 000000001ed00000
FS:  0000555555a8f300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005566a6d2f680 CR3: 00000000209cd000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ip_set_range_to_cidr+0xa1/0x160 net/netfilter/ipset/pfxlen.c:177
 hash_net4_uadt+0x50c/0x9d0 net/netfilter/ipset/ip_set_hash_net.c:193
 call_ad.constprop.0+0x101/0x760 net/netfilter/ipset/ip_set_core.c:1698
 ip_set_ad.constprop.0.isra.0+0x4c7/0xac0 net/netfilter/ipset/ip_set_core.c:1787
 nfnetlink_rcv_msg+0xbca/0x1430 net/netfilter/nfnetlink.c:301
 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540
 nfnetlink_rcv+0x1b0/0x420 net/netfilter/nfnetlink.c:659
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84eb8bcd49
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff9090b4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f84eb8bcd49
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 0000000000000140 R11: 0000000000000246 R12: 00007fff9090b4e0
R13: 00007fff9090b500 R14: 00007fff9090b5e0 R15: 00007f84eb8f90ba
 </TASK>

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-root 2022/12/09 22:28 upstream 0d1409e4ff08 67be1ae7 .config strace log report syz C [disk image] [vmlinux] [kernel image] INFO: task hung in nfnetlink_rcv_msg
ci-upstream-kasan-gce 2022/11/25 00:05 upstream c3eb11fbb826 62e26685 .config console log report syz C [disk image] [vmlinux] [kernel image] INFO: task hung in nfnetlink_rcv_msg
ci-upstream-net-this-kasan-gce 2022/11/24 21:41 net 08e8a949f684 62e26685 .config console log report syz C [disk image] [vmlinux] [kernel image] INFO: task hung in nfnetlink_rcv_msg
ci-upstream-net-kasan-gce 2022/11/24 22:04 net-next 170d97739de4 62e26685 .config strace log report syz C [disk image] [vmlinux] [kernel image] INFO: task hung in nfnetlink_rcv_msg
ci-upstream-gce-arm64 2022/11/26 03:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6d464646530f 74a66371 .config console log report syz C [disk image] [vmlinux] [kernel image] INFO: task hung in nfnetlink_rcv_msg
* Struck through repros no longer work on HEAD.