syzbot


INFO: task hung in nl802154_prepare_wpan_dev_dump

Status: upstream: reported on 2024/05/22 02:51
Reported-by: syzbot+55e2ae78d6da07fc5cf9@syzkaller.appspotmail.com
First crash: 34d, last: 34d

Sample crash report:
INFO: task syz-executor.0:6241 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:25792 pid:6241  ppid:5428   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 nl802154_prepare_wpan_dev_dump+0x4b/0x460 net/ieee802154/nl802154.c:242
 nl802154_dump_llsec_dev+0x14d/0xf30 net/ieee802154/nl802154.c:1677
 genl_lock_dumpit+0x69/0x90 net/netlink/genetlink.c:640
 netlink_dump+0x603/0xc50 net/netlink/af_netlink.c:2231
 __netlink_dump_start+0x541/0x6e0 net/netlink/af_netlink.c:2335
 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:703 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:830 [inline]
 genl_rcv_msg+0x7c9/0xf70 net/netlink/genetlink.c:850
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/22 02:51 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl802154_prepare_wpan_dev_dump
* Struck through repros no longer work on HEAD.