Greeting, FYI, we noticed the following commit (built with gcc-11): commit: ee88d363d15617ff50ac24fab0ffec11113b2aeb ("x86,static_call: Use alternative RET encoding") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): please be noted we noticed there is fix commit: c27c753ea6fd1 "x86/static_call: Serialize __static_call_fixup() properly" but the issue still exists on it, and also exists on latest mainline commit when this bisection finished: 72a8e05d4f66b "Merge tag 'ovl-fixes-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs" If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 22.065014][ T0] ------------[ cut here ]------------ [ 22.066738][ T0] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:557 apply_returns (arch/x86/kernel/alternative.c:557 (discriminator 1)) [ 22.069534][ T0] Modules linked in: [ 22.070738][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc4-00008-gee88d363d156 #1 [ 22.072739][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014 [ 22.074741][ T0] RIP: 0010:apply_returns (arch/x86/kernel/alternative.c:557 (discriminator 1)) [ 22.076739][ T0] Code: ff ff 74 cb 48 83 c5 04 49 39 ee 0f 87 81 fe ff ff e9 22 ff ff ff 0f 0b 48 83 c5 04 49 39 ee 0f 87 6d fe ff ff e9 0e ff ff ff <0f> 0b 48 83 c5 04 49 39 ee 0f 87 59 fe ff ff e9 fa fe ff ff 48 89 All code ======== 0: ff (bad) 1: ff 74 cb 48 pushq 0x48(%rbx,%rcx,8) 5: 83 c5 04 add $0x4,%ebp 8: 49 39 ee cmp %rbp,%r14 b: 0f 87 81 fe ff ff ja 0xfffffffffffffe92 11: e9 22 ff ff ff jmpq 0xffffffffffffff38 16: 0f 0b ud2 18: 48 83 c5 04 add $0x4,%rbp 1c: 49 39 ee cmp %rbp,%r14 1f: 0f 87 6d fe ff ff ja 0xfffffffffffffe92 25: e9 0e ff ff ff jmpq 0xffffffffffffff38 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 83 c5 04 add $0x4,%rbp 30: 49 39 ee cmp %rbp,%r14 33: 0f 87 59 fe ff ff ja 0xfffffffffffffe92 39: e9 fa fe ff ff jmpq 0xffffffffffffff38 3e: 48 rex.W 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 83 c5 04 add $0x4,%rbp 6: 49 39 ee cmp %rbp,%r14 9: 0f 87 59 fe ff ff ja 0xfffffffffffffe68 f: e9 fa fe ff ff jmpq 0xffffffffffffff0e 14: 48 rex.W 15: 89 .byte 0x89 [ 22.078738][ T0] RSP: 0000:ffffffffa2807dc0 EFLAGS: 00010202 [ 22.080737][ T0] RAX: 0000000000000000 RBX: ffffffffa1b8fe05 RCX: 0000000000000000 [ 22.082546][ T0] RDX: 000000000000000f RSI: ffffffffa184a3e0 RDI: ffffffffa1b8fe05 [ 22.083738][ T0] RBP: ffffffffa42851e8 R08: 0000000000000001 R09: ffffffffa1b8fe05 [ 22.086491][ T0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa1b8fe00 [ 22.087738][ T0] R13: dffffc0000000000 R14: ffffffffa4299890 R15: 1ffffffff4500fbb [ 22.089739][ T0] FS: 0000000000000000(0000) GS:ffff888396600000(0000) knlGS:0000000000000000 [ 22.091743][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.093738][ T0] CR2: ffff88843ffff000 CR3: 00000003a562a000 CR4: 00000000000006f0 [ 22.095753][ T0] Call Trace: [ 22.097742][ T0] [ 22.098765][ T0] ? rwlock_bug+0xc0/0xc0 [ 22.100230][ T0] ? apply_retpolines (arch/x86/kernel/alternative.c:538) [ 22.101791][ T0] ? int3_exception_notify (arch/x86/kernel/alternative.c:849) [ 22.103261][ T0] ? check_bugs (arch/x86/kernel/cpu/bugs.c:149) [ 22.104751][ T0] alternative_instructions (arch/x86/kernel/alternative.c:932) [ 22.106766][ T0] check_bugs (arch/x86/kernel/cpu/bugs.c:159) [ 22.108244][ T0] start_kernel (init/main.c:1132) [ 22.109747][ T0] secondary_startup_64_no_verify (arch/x86/kernel/head_64.S:358) [ 22.111300][ T0] [ 22.112742][ T0] irq event stamp: 87769 [ 22.113741][ T0] hardirqs last enabled at (87781): __up_console_sem (arch/x86/include/asm/irqflags.h:45 (discriminator 1) arch/x86/include/asm/irqflags.h:80 (discriminator 1) arch/x86/include/asm/irqflags.h:138 (discriminator 1) kernel/printk/printk.c:264 (discriminator 1)) [ 22.115740][ T0] hardirqs last disabled at (87794): __up_console_sem (kernel/printk/printk.c:262 (discriminator 1)) [ 22.117739][ T0] softirqs last enabled at (2774): cgroup_idr_alloc+0x5b/0x1c0 [ 22.119739][ T0] softirqs last disabled at (2772): cgroup_idr_alloc+0x2e/0x1c0 [ 22.121741][ T0] ---[ end trace 0000000000000000 ]--- [ 22.141235][ T0] Freeing SMP alternatives memory: 44K [ 22.144654][ T1] smpboot: CPU0: Intel Xeon E312xx (Sandy Bridge) (family: 0x6, model: 0x2a, stepping: 0x1) [ 22.149556][ T1] cblist_init_generic: Setting adjustable number of callback queues. [ 22.149743][ T1] cblist_init_generic: Setting shift to 1 and lim to 1. [ 22.152024][ T1] cblist_init_generic: Setting shift to 1 and lim to 1. [ 22.153900][ T1] Running RCU-tasks wait API self tests [ 22.155660][ T1] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only. [ 22.157632][ T1] rcu: Hierarchical SRCU implementation. [ 22.163849][ T12] Callback from call_rcu_tasks_trace() invoked. [ 22.167856][ T1] NMI watchdog: Perf NMI watchdog permanently disabled [ 22.171321][ T1] smp: Bringing up secondary CPUs ... [ 22.175938][ T1] x86: Booting SMP configuration: [ 22.177337][ T1] .... node #0, CPUs: #1 [ 0.223939][ T0] masked ExtINT on CPU#1 [ 22.184004][ T1] smp: Brought up 1 node, 2 CPUs [ 22.185764][ T1] smpboot: Max logical packages: 1 [ 22.187285][ T1] smpboot: Total of 2 processors activated (11200.39 BogoMIPS) [ 22.270174][ T11] Callback from call_rcu_tasks_rude() invoked. [ 22.418970][ T23] node 0 deferred pages initialised in 228ms [ 22.874410][ T1] allocated 268435456 bytes of page_ext [ 22.875753][ T1] Node 0, zone DMA: page owner found early allocated 0 pages [ 22.882035][ T1] Node 0, zone DMA32: page owner found early allocated 0 pages [ 22.943324][ T1] Node 0, zone Normal: page owner found early allocated 66889 pages [ 22.947637][ T1] devtmpfs: initialized [ 22.950416][ T1] x86/mm: Memory block size: 128MB [ 23.029610][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns [ 23.030846][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear) [ 23.034332][ T1] pinctrl core: initialized pinctrl subsystem [ 23.059364][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family [ 23.064611][ T1] audit: initializing netlink subsys (disabled) [ 23.065940][ T28] audit: type=2000 audit(1657669959.786:1): state=initialized audit_enabled=0 res=1 [ 23.070463][ T1] thermal_sys: Registered thermal governor 'fair_share' [ 23.070479][ T1] thermal_sys: Registered thermal governor 'bang_bang' [ 23.071374][ T1] thermal_sys: Registered thermal governor 'step_wise' [ 23.072313][ T1] thermal_sys: Registered thermal governor 'user_space' [ 23.073704][ T1] cpuidle: using governor menu [ 23.077082][ T1] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 23.080623][ T1] PCI: Using configuration type 1 for base access [ 23.180007][ T1] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible. [ 23.231960][ T1] HugeTLB: can optimize 7 vmemmap pages for hugepages-2048kB [ 23.233551][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 23.238663][ T1] cryptd: max_cpu_qlen set to 1000 [ 23.246101][ T1] ACPI: Added _OSI(Module Device) [ 23.247247][ T1] ACPI: Added _OSI(Processor Device) [ 23.248255][ T1] ACPI: Added _OSI(3.0 _SCP Extensions) [ 23.249269][ T1] ACPI: Added _OSI(Processor Aggregator Device) [ 23.250344][ T1] ACPI: Added _OSI(Linux-Dell-Video) [ 23.251186][ T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 23.252204][ T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) [ 23.324111][ T1] ACPI: 1 ACPI AML tables successfully acquired and loaded [ 23.363631][ T1] ACPI: Interpreter enabled [ 23.364833][ T1] ACPI: PM: (supports S0 S3 S4 S5) [ 23.366349][ T1] ACPI: Using IOAPIC for interrupt routing [ 23.367868][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 23.369654][ T1] PCI: Using E820 reservations for host bridge windows [ 23.376215][ T1] ACPI: Enabled 2 GPEs in block 00 to 0F [ 23.518867][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 23.520463][ T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3] [ 23.521566][ T1] acpi PNP0A03:00: _OSC: not requesting OS control; OS requires [ExtendedConfig ASPM ClockPM MSI] [ 23.523541][ T1] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. [ 23.540637][ T1] acpiphp: Slot [3] registered [ 23.541844][ T1] acpiphp: Slot [4] registered [ 23.543895][ T1] acpiphp: Slot [5] registered [ 23.545794][ T1] acpiphp: Slot [6] registered [ 23.547391][ T1] acpiphp: Slot [7] registered [ 23.548701][ T1] acpiphp: Slot [8] registered [ 23.549700][ T1] acpiphp: Slot [9] registered [ 23.550720][ T1] acpiphp: Slot [10] registered [ 23.552497][ T1] acpiphp: Slot [11] registered [ 23.553839][ T1] acpiphp: Slot [12] registered [ 23.555713][ T1] acpiphp: Slot [13] registered [ 23.556757][ T1] acpiphp: Slot [14] registered [ 23.558331][ T1] acpiphp: Slot [15] registered [ 23.559715][ T1] acpiphp: Slot [16] registered [ 23.560726][ T1] acpiphp: Slot [17] registered [ 23.562788][ T1] acpiphp: Slot [18] registered [ 23.564347][ T1] acpiphp: Slot [19] registered [ 23.565738][ T1] acpiphp: Slot [20] registered [ 23.567756][ T1] acpiphp: Slot [21] registered [ 23.569297][ T1] acpiphp: Slot [22] registered [ 23.570773][ T1] acpiphp: Slot [23] registered [ 23.572670][ T1] acpiphp: Slot [24] registered [ 23.573714][ T1] acpiphp: Slot [25] registered [ 23.574727][ T1] acpiphp: Slot [26] registered [ 23.576872][ T1] acpiphp: Slot [27] registered [ 23.578840][ T1] acpiphp: Slot [28] registered [ 23.580841][ T1] acpiphp: Slot [29] registered [ 23.582789][ T1] acpiphp: Slot [30] registered [ 23.584923][ T1] acpiphp: Slot [31] registered [ 23.586584][ T1] PCI host bridge to bus 0000:00 To reproduce: # build kernel cd linux cp config-5.19.0-rc4-00008-gee88d363d156 .config make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://01.org/lkp