[syzbot] [net?] INFO: task hung in devinet_ioctl (5)
From: syzbot <hidden>
Date: 2024-06-13 18:48:20
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Hello, syzbot found the following issue on: HEAD commit: 83a7eefedc9b Linux 6.10-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17e752e2980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c79815c08cc14227 dashboard link: https://syzkaller.appspot.com/bug?extid=78761e13e81f4bfbb554 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3e8762812d56/disk-83a7eefe.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29ef4962890d/vmlinux-83a7eefe.xz kernel image: https://storage.googleapis.com/syzbot-assets/1a5e4d91d135/bzImage-83a7eefe.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+78761e13e81f4bfbb554@syzkaller.appspotmail.com INFO: task dhcpcd:4751 blocked for more than 143 seconds. Not tainted 6.10.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:20384 pid:4751 tgid:4751 ppid:4750 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x1796/0x49d0 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1101 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1003 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f583bfd7d49 RSP: 002b:00007ffe78ed73c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f583bf096c0 RCX: 00007f583bfd7d49 RDX: 00007ffe78ee75b8 RSI: 0000000000008914 RDI: 0000000000000018 RBP: 00007ffe78ef7778 R08: 00007ffe78ee7578 R09: 00007ffe78ee7528 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe78ee75b8 R14: 0000000000000028 R15: 0000000000008914 </TASK> INFO: task kworker/0:5:5155 blocked for more than 143 seconds. Not tainted 6.10.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack:22384 pid:5155 tgid:5155 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x1796/0x49d0 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:276 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup