Hello, I hit a rare splat on TREE04 on a 5.10 stable kernel. This is after several days of testing (doesn't run the whole day, just a few hours each day). I am posting it below for archival (I haven't looked too closely yet), at some point I'll start having my automation also post to the list automatically on such issues. All test artifacts are here: http://box.joelfernandes.org:9080/job/rcutorture_stable/job/linux-5.10.y/89/artifact/tools/testing/selftests/rcutorture/res/2023.08.17-04.01.54/TREE04/ [ 2819.565152] smpboot: CPU 3 is now offline [ 2821.366444] ------------[ cut here ]------------ [ 2821.406212] smpboot: CPU 7 is now offline [ 2821.442438] WARNING: CPU: 0 PID: 2281 at kernel/irq_work.c:95 irq_work_queue_on+0x70/0x80 [ 2821.466994] Modules linked in: [ 2821.499250] CPU: 0 PID: 2281 Comm: kworker/0:1 Not tainted 5.10.191+ #242 [ 2821.516861] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 2821.540362] Workqueue: rcu_gp wait_rcu_exp_gp [ 2821.551740] RIP: 0010:irq_work_queue_on+0x70/0x80 [ 2821.564221] Code: 00 75 1c 48 89 fe 89 cf e8 7d 21 fa ff 89 d8 5b c3 cc cc cc cc 31 db 89 d8 5b c3 cc cc cc cc 0f 0b eb e0 e8 f2 fe ff ff eb e3 <0f> 0b eb 9c 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 c7 c0 d8 ad 02 [ 2821.603978] RSP: 0018:ffffb6d0c025fe38 EFLAGS: 00010282 [ 2821.618971] RAX: 0000000000000007 RBX: 0000000000000007 RCX: 0000000000000007 [ 2821.633318] RDX: ffff94d3df5e2b28 RSI: 0000000000000007 RDI: ffff94d3df5e2a40 [ 2821.650157] RBP: 000000000007c8c0 R08: 0000000000000000 R09: ffffffff8b536788 [ 2821.668728] R10: 0000000000000003 R11: 0000000000000001 R12: ffffffff8b536788 [ 2821.700194] R13: 0000000000005208 R14: 000000000002e580 R15: ffffffff8b536740 [ 2821.713002] FS: 0000000000000000(0000) GS:ffff94d3df400000(0000) knlGS:0000000000000000 [ 2821.726975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2821.737078] CR2: 0000000000000000 CR3: 00000000024e0000 CR4: 00000000000006f0 [ 2821.749616] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 2821.763279] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 2821.776264] Call Trace: [ 2821.781516] ? __warn+0x7c/0x100 [ 2821.787860] ? irq_work_queue_on+0x70/0x80 [ 2821.795412] ? report_bug+0x99/0xc0 [ 2821.802790] ? handle_bug+0x41/0x80 [ 2821.809271] ? exc_invalid_op+0x13/0x60 [ 2821.816196] ? asm_exc_invalid_op+0x12/0x20 [ 2821.823808] ? irq_work_queue_on+0x70/0x80 [ 2821.831849] tick_nohz_dep_set_cpu+0x59/0x70 [ 2821.843360] rcu_exp_wait_wake+0x3ce/0x410 [ 2821.865209] process_one_work+0x1e5/0x370 [ 2821.889917] worker_thread+0x45/0x3b0 [ 2821.908011] ? process_one_work+0x370/0x370 [ 2821.915608] kthread+0x110/0x130 [ 2821.937705] ? __kthread_bind_mask+0x60/0x60 [ 2821.945581] ret_from_fork+0x22/0x30 [ 2821.962225] ---[ end trace 4ba8b82994399b6a ]--- [ 2822.451287] smpboot: Booting Node 0 Processor 7 APIC 0x7
