Hello, syzbot found the following issue on: HEAD commit: cacc6e22932f tpm: Add a helper for checking hwrng enabled git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13b0b5c7a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e670757e16affb dashboard link: https://syzkaller.appspot.com/bug?extid=b904439e05f11f81ac62 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a49fcda80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136f8679a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c18b40f6d56d/disk-cacc6e22.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b270ef22b038/vmlinux-cacc6e22.xz kernel image: https://storage.googleapis.com/syzbot-assets/aae3a8e7d564/bzImage-cacc6e22.xz The issue was bisected to: commit c2368b19807affd7621f7c4638cd2e17fec13021 Author: Jiri Pirko <jiri@xxxxxxxxxx> Date: Fri Jul 29 07:10:35 2022 +0000 net: devlink: introduce "unregistering" mark and use it during devlinks iteration bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=123267c3a80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=113267c3a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=163267c3a80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b904439e05f11f81ac62@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: c2368b19807a ("net: devlink: introduce "unregistering" mark and use it during devlinks iteration") rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10490 ticks this GP) idle=5a24/1/0x4000000000000000 softirq=8393/8393 fqs=5242 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 25922 26566 195 ==> 52500(ms) rcu: (t=10502 jiffies g=5333 q=584 ncpus=2) CPU: 1 PID: 5054 Comm: kworker/1:4 Not tainted 6.5.0-rc5-syzkaller-00056-gcacc6e22932f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: events cfg80211_wiphy_work RIP: 0010:taprio_dequeue_tc_priority+0x266/0x4b0 net/sched/sch_taprio.c:798 Code: 10 89 ef 44 89 f6 e8 39 b5 2c f9 44 39 f5 0f 84 40 ff ff ff e8 3b ba 2c f9 49 83 ff 0f 0f 87 e1 01 00 00 48 8b 04 24 0f b6 00 <38> 44 24 36 7c 08 84 c0 0f 85 bf 01 00 00 8b 33 8b 4c 24 30 48 8b RSP: 0018:ffffc900001e0d60 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88802b8e7394 RCX: 0000000000000100 RDX: ffff888076ac0000 RSI: ffffffff88594e65 RDI: 0000000000000004 RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000010 R13: ffff88807af8ab60 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 0000000022134000 CR4: 0000000000350ee0 Call Trace: <IRQ> taprio_dequeue+0x12e/0x5f0 net/sched/sch_taprio.c:868 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1c4/0x19d0 net/sched/sch_generic.c:415 qdisc_run include/net/pkt_sched.h:125 [inline] qdisc_run include/net/pkt_sched.h:122 [inline] net_tx_action+0x71e/0xc80 net/core/dev.c:5049 __do_softirq+0x218/0x965 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__ieee80211_link_release_channel+0x2/0x450 net/mac80211/chan.c:1778 Code: 89 f7 e8 81 1f 21 f8 e9 44 e0 ff ff 4c 89 f7 e8 74 1f 21 f8 e9 fe fb ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 <41> 56 41 55 41 54 55 53 48 89 fb e8 3e 15 cd f7 48 89 da 48 b8 00 RSP: 0018:ffffc90003cff768 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888076ac0000 RSI: ffffffff89b909f5 RDI: ffff8880677463a8 RBP: ffff8880677463a8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888067744c80 R13: ffffc90003cff890 R14: ffff888066980e20 R15: ffff888067746c82 ieee80211_link_use_channel+0x2dd/0x750 net/mac80211/chan.c:1849 __ieee80211_sta_join_ibss+0x5f3/0x17e0 net/mac80211/ibss.c:303 ieee80211_sta_create_ibss+0x206/0x410 net/mac80211/ibss.c:1352 ieee80211_sta_find_ibss net/mac80211/ibss.c:1482 [inline] ieee80211_ibss_work+0xc19/0x15a0 net/mac80211/ibss.c:1709 ieee80211_iface_work+0xbb8/0xd40 net/mac80211/iface.c:1680 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
