syzbot has found a reproducer for the following issue on: HEAD commit: 0be23810e32e Add linux-next specific files for 20250714 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17c3e98c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=adc3ea2bfe31343b dashboard link: https://syzkaller.appspot.com/bug?extid=adeb8550754921fece20 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d1098c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116b08f0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/13b5be5048fe/disk-0be23810.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3d2b3b2ceddf/vmlinux-0be23810.xz kernel image: https://storage.googleapis.com/syzbot-assets/c7e5fbf3efa6/bzImage-0be23810.xz The issue was bisected to: commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 Author: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx> Date: Sat Sep 29 00:59:43 2018 +0000 tc: Add support for configuring the taprio scheduler bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10de9adf980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12de9adf980000 console output: https://syzkaller.appspot.com/x/log.txt?x=14de9adf980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+adeb8550754921fece20@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") INFO: task syz-executor:6015 blocked for more than 143 seconds. Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26920 pid:6015 tgid:6015 ppid:1 task_flags:0x400140 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5314 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6697 __schedule_loop kernel/sched/core.c:6775 [inline] schedule+0x165/0x360 kernel/sched/core.c:6790 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6847 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 rtnl_net_lock include/linux/rtnetlink.h:130 [inline] inet_rtm_newaddr+0x3b0/0x18b0 net/ipv4/devinet.c:979 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
