On Mon, Jun 24, 2024 at 06:43:54AM +0000, bugzilla-daemon@xxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=218980 > > Bug ID: 218980 > Summary: [VM boot] Guest Kernel hit BUG: kernel NULL pointer > dereference, address: 0000000000000010 and WARNING: > CPU: 0 PID: 218 at arch/x86/kernel/fpu/core.c:57 > x86_task_fpu+0x17/0x20 > Product: Virtualization > Version: unspecified > Hardware: All > OS: Linux > Status: NEW > Severity: normal > Priority: P3 > Component: kvm > Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx > Reporter: hongyu.ning@xxxxxxxxx > Regression: No > > Created attachment 306485 > --> https://bugzilla.kernel.org/attachment.cgi?id=306485&action=edit > WARNING/BUG and Call Trace info in dmesg > > in an regular linux-next guest kernel regression test setup, recently hit > following BUG and WARNING, likely related to x86/fpu. > [ 1.962383] ? fpstate_free+0x5/0x30 Yeah we run into the same thing on *all* boots on linux-next on kdevops as well, Cc'ing kdevops list so folks are aware linux-next is broken right now. [ 16.785349] BUG: kernel NULL pointer dereference, address: 0000000000000010 [ 16.785353] #PF: supervisor read access in kernel mode [ OK ] Found device[ 16.785354] #PF: error_code(0x0000) - not-present page dev-disk-by\x2dlabel-…evice - QEMU NVMe Ctrl sparsefiles. [ 16.785356] PGD 0 P4D 0 [ 16.785358] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI [ 16.785361] CPU: 1 UID: 0 PID: 528 Comm: modprobe Tainted: G W 6.10.0-rc5-next-20240628+ #8 [ 16.785365] Tainted: [W]=WARN [ 16.785366] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.785367] RIP: 0010:fpstate_free+0x5/0x30 [ 16.785373] Code: 41 5c 41 5d 41 5e c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 <48> 8b 47 10 48 85 c0 74 11 48 83 c7 40 48 39 f8 74 08 48 89 c7 e9 [ 16.785374] RSP: 0000:ffffb4dd80673e48 EFLAGS: 00010246 [ 16.785376] RAX: 0000000000000000 RBX: ffff8eca5fdd0000 RCX: 00000000801c0012 [ 16.785378] RDX: ffff8eca54bef500 RSI: ffffffff8aa9b92d RDI: 0000000000000000 [ 16.785379] RBP: ffff8ecabbc72840 R08: ffff8eca54bed100 R09: 00000000801c0012 [ 16.785380] R10: 00000000801c0012 R11: 0000000000000001 R12: ffff8eca605dc800 [ 16.785381] R13: 0000000000030bc8 R14: ffff8ecabbc728b8 R15: 0000000000000004 [ 16.785382] FS: 00007f26f73a35c0(0000) GS:ffff8ecabbc40000(0000) knlGS:0000000000000000 [ 16.785383] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 16.785385] CR2: 0000000000000010 CR3: 00000001175b6006 CR4: 0000000000770ef0 [ 16.785389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 16.785390] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 16.785391] PKRU: 55555554 [ 16.785392] Call Trace: [ 16.785394] <TASK> [ 16.785396] ? __die+0x1f/0x60 [ 16.785401] ? page_fault_oops+0x158/0x460 [ 16.785406] ? x86_task_fpu+0x17/0x20 [ 16.785410] ? do_user_addr_fault+0x63/0x6c0 [ 16.785413] ? exc_page_fault+0x79/0x190 [ 16.785417] ? asm_exc_page_fault+0x22/0x30 [ 16.785420] ? free_task+0x2d/0x70 [ 16.785424] ? fpstate_free+0x5/0x30 [ 16.785427] ? arch_release_task_struct+0x27/0x30 [ 16.785429] free_task+0x35/0x70 [ 16.785432] rcu_core+0x499/0x7d0 [ 16.785436] ? rcu_core+0x434/0x7d0 [ 16.785440] handle_softirqs+0xf9/0x300 [ 16.785444] __irq_exit_rcu+0x6e/0xc0 [ 16.785446] sysvec_apic_timer_interrupt+0x51/0xc0 [ 16.785450] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 16.785452] RIP: 0033:0x7f26f74d0858
