syzbot


INFO: task hung in nl80211_pre_doit

Status: upstream: reported on 2024/05/24 07:02
Reported-by: syzbot+df885998e4eea67cf1b9@syzkaller.appspotmail.com
First crash: 24d, last: 3d00h
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in rtnetlink_rcv_msg net C inconclusive inconclusive 1860 32m 1942d 0/27 upstream: reported C repro on 2019/02/22 17:00
upstream INFO: task hung in nl80211_pre_doit wireless 5 1228d 1306d 0/27 auto-closed as invalid on 2021/05/17 09:21
linux-4.19 INFO: task hung in nl80211_pre_doit 1 886d 886d 0/1 auto-closed as invalid on 2022/05/13 08:55
upstream INFO: task hung in nl80211_pre_doit (2) wireless 18 973d 1013d 0/27 auto-closed as invalid on 2022/01/17 00:54
linux-5.15 INFO: task hung in nl80211_pre_doit 7 12h58m 24d 0/3 upstream: reported on 2024/05/24 13:56
linux-4.19 INFO: task hung in nl80211_pre_doit (2) 1 534d 534d 0/1 upstream: reported on 2022/12/31 06:52

Sample crash report:
INFO: task syz-executor.3:13225 blocked for more than 143 seconds.
      Not tainted 6.1.93-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26376 pid:13225 ppid:12048  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
 nl80211_pre_doit+0x5b/0x8a0 net/wireless/nl80211.c:16191
 genl_family_rcv_msg_doit net/netlink/genetlink.c:751 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0xbc1/0xf70 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
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f30e227cea9
RSP: 002b:00007f30e2f6c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f30e23b3f80 RCX: 00007f30e227cea9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f30e22ebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f30e23b3f80 R15: 00007fff46565628

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/15 04:59 linux-6.1.y ae9f2a70d69e f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl80211_pre_doit
2024/06/12 00:09 linux-6.1.y 88690811da69 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl80211_pre_doit
2024/06/04 20:54 linux-6.1.y 88690811da69 11f2afa5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl80211_pre_doit
2024/06/03 23:00 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl80211_pre_doit
2024/05/24 07:01 linux-6.1.y 4078fa637fcd 8f98448e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in nl80211_pre_doit
* Struck through repros no longer work on HEAD.