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Message-ID: <202508120315.19f6266a-lkp@intel.com>
Date: Tue, 12 Aug 2025 09:59:26 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Chen Yu <yu.c.chen@...el.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, Jianyong Wu
<jianyong.wu@...look.com>, Shrikanth Hegde <sshegde@...ux.ibm.com>, Tim Chen
<tim.c.chen@...ux.intel.com>, <linux-kernel@...r.kernel.org>,
<aubrey.li@...ux.intel.com>, <yu.c.chen@...el.com>, Peter Zijlstra
<peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, K Prateek Nayak
<kprateek.nayak@....com>, "Gautham R . Shenoy" <gautham.shenoy@....com>,
Vincent Guittot <vincent.guittot@...aro.org>, Juri Lelli
<juri.lelli@...hat.com>, Dietmar Eggemann <dietmar.eggemann@....com>, "Steven
Rostedt" <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, Mel Gorman
<mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>, Libo Chen
<libo.chen@...cle.com>, Madadi Vineeth Reddy <vineethr@...ux.ibm.com>, "Hillf
Danton" <hdanton@...a.com>, Yangyu Chen <cyy@...self.name>, Tingyin Duan
<tingyin.duan@...il.com>, Vern Hao <vernhao@...cent.com>, Len Brown
<len.brown@...el.com>, Aubrey Li <aubrey.li@...el.com>, Zhao Liu
<zhao1.liu@...el.com>, Chen Yu <yu.chen.surf@...il.com>,
<oliver.sang@...el.com>
Subject: Re: [RFC PATCH v4 23/28] sched: Scan a task's preferred node for
preferred LLC
Hello,
kernel test robot noticed "BUG:using_smp_processor_id()in_preemptible" on:
commit: ff797757d658ecda432e4c33c0cfc2b704af2b06 ("[RFC PATCH v4 23/28] sched: Scan a task's preferred node for preferred LLC")
url: https://github.com/intel-lab-lkp/linux/commits/Chen-Yu/sched-Cache-aware-load-balancing/20250809-131716
base: v6.16
patch link: https://lore.kernel.org/all/178bf43d7cbc9b2c9aea408dd56b87391067df37.1754712565.git.tim.c.chen@linux.intel.com/
patch subject: [RFC PATCH v4 23/28] sched: Scan a task's preferred node for preferred LLC
in testcase: boot
config: x86_64-randconfig-103-20250810
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+------------------------------------------------------+------------+------------+
| | 552a2db758 | ff797757d6 |
+------------------------------------------------------+------------+------------+
| BUG:using_smp_processor_id()in_preemptible | 0 | 11 |
+------------------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202508120315.19f6266a-lkp@intel.com
[ 19.177186][ T64] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/64
[ 19.179622][ T64] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.181347][ T64] CPU: 0 UID: 0 PID: 64 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.181372][ T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.181385][ T64] Call Trace:
[ 19.181391][ T64] <TASK>
[ 19.181401][ T64] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.181440][ T64] dump_stack (lib/dump_stack.c:130)
[ 19.181465][ T64] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.181494][ T64] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.181514][ T64] task_cache_work (kernel/sched/fair.c:1422)
[ 19.181531][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.181569][ T64] ? lock_is_held (include/linux/lockdep.h:249)
[ 19.181594][ T64] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.181626][ T64] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.181642][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.181663][ T64] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.181697][ T64] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.181724][ T64] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.181747][ T64] ? preempt_latency_start (include/linux/ftrace.h:1091 kernel/sched/core.c:5866)
[ 19.181782][ T64] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.181817][ T64] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.181843][ T64] irqentry_exit (kernel/entry/common.c:287)
[ 19.181862][ T64] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.181898][ T64] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.181916][ T64] RIP: 0023:0xf7ee9067
[ 19.181933][ T64] Code: fe ff ff 8b 00 85 c0 0f 84 96 00 00 00 8b 8d 60 fe ff ff 8b 51 30 85 d2 74 03 01 42 04 8b 8d 60 fe ff ff 8b 51 2c 85 d2 74 03 <01> 42 04 8b bd 60 fe ff ff 8b 57 34 85 d2 74 03 01 42 04 8b 8d 60
All code
========
0: fe (bad)
1: ff (bad)
2: ff 8b 00 85 c0 0f decl 0xfc08500(%rbx)
8: 84 96 00 00 00 8b test %dl,-0x75000000(%rsi)
e: 8d 60 fe lea -0x2(%rax),%esp
11: ff (bad)
12: ff 8b 51 30 85 d2 decl -0x2d7acfaf(%rbx)
18: 74 03 je 0x1d
1a: 01 42 04 add %eax,0x4(%rdx)
1d: 8b 8d 60 fe ff ff mov -0x1a0(%rbp),%ecx
23: 8b 51 2c mov 0x2c(%rcx),%edx
26: 85 d2 test %edx,%edx
28: 74 03 je 0x2d
2a:* 01 42 04 add %eax,0x4(%rdx) <-- trapping instruction
2d: 8b bd 60 fe ff ff mov -0x1a0(%rbp),%edi
33: 8b 57 34 mov 0x34(%rdi),%edx
36: 85 d2 test %edx,%edx
38: 74 03 je 0x3d
3a: 01 42 04 add %eax,0x4(%rdx)
3d: 8b .byte 0x8b
3e: 8d .byte 0x8d
3f: 60 (bad)
Code starting with the faulting instruction
===========================================
0: 01 42 04 add %eax,0x4(%rdx)
3: 8b bd 60 fe ff ff mov -0x1a0(%rbp),%edi
9: 8b 57 34 mov 0x34(%rdi),%edx
c: 85 d2 test %edx,%edx
e: 74 03 je 0x13
10: 01 42 04 add %eax,0x4(%rdx)
13: 8b .byte 0x8b
14: 8d .byte 0x8d
15: 60 (bad)
[ 19.181949][ T64] RSP: 002b:00000000fffd59c0 EFLAGS: 00010206
[ 19.181966][ T64] RAX: 00000000565ad000 RBX: 0000000000000001 RCX: 00000000f7f11980
[ 19.181978][ T64] RDX: 00000000565dbd44 RSI: 00000000effffef5 RDI: 000000006fffffff
[ 19.181990][ T64] RBP: 00000000fffd5bb8 R08: 0000000000000000 R09: 0000000000000000
[ 19.182001][ T64] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.182013][ T64] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.182063][ T64] </TASK>
[ 19.230078][ T64] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/64
[ 19.230948][ T64] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.231549][ T64] CPU: 0 UID: 0 PID: 64 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.231557][ T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.231561][ T64] Call Trace:
[ 19.231564][ T64] <TASK>
[ 19.231567][ T64] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.231580][ T64] dump_stack (lib/dump_stack.c:130)
[ 19.231588][ T64] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.231598][ T64] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.231604][ T64] task_cache_work (kernel/sched/fair.c:1422)
[ 19.231615][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.231627][ T64] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.231637][ T64] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.231643][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.231649][ T64] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.231659][ T64] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.231668][ T64] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.231680][ T64] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.231691][ T64] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.231699][ T64] irqentry_exit (kernel/entry/common.c:287)
[ 19.231705][ T64] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.231717][ T64] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.231723][ T64] RIP: 0023:0xf7f03797
[ 19.231729][ T64] Code: 24 0c e3 2c 89 d7 83 e2 03 74 11 7a 04 aa 49 74 1f aa 49 74 1b 83 f2 01 75 02 aa 49 89 ca c1 e9 02 83 e2 03 69 c0 01 01 01 01 <f3> ab 89 d1 f3 aa 8b 44 24 08 5f c3 66 90 66 90 66 90 66 90 66 90
All code
========
0: 24 0c and $0xc,%al
2: e3 2c jrcxz 0x30
4: 89 d7 mov %edx,%edi
6: 83 e2 03 and $0x3,%edx
9: 74 11 je 0x1c
b: 7a 04 jp 0x11
d: aa stos %al,%es:(%rdi)
e: 49 74 1f rex.WB je 0x30
11: aa stos %al,%es:(%rdi)
12: 49 74 1b rex.WB je 0x30
15: 83 f2 01 xor $0x1,%edx
18: 75 02 jne 0x1c
1a: aa stos %al,%es:(%rdi)
1b: 49 89 ca mov %rcx,%r10
1e: c1 e9 02 shr $0x2,%ecx
21: 83 e2 03 and $0x3,%edx
24: 69 c0 01 01 01 01 imul $0x1010101,%eax,%eax
2a:* f3 ab rep stos %eax,%es:(%rdi) <-- trapping instruction
2c: 89 d1 mov %edx,%ecx
2e: f3 aa rep stos %al,%es:(%rdi)
30: 8b 44 24 08 mov 0x8(%rsp),%eax
34: 5f pop %rdi
35: c3 ret
36: 66 90 xchg %ax,%ax
38: 66 90 xchg %ax,%ax
3a: 66 90 xchg %ax,%ax
3c: 66 90 xchg %ax,%ax
3e: 66 90 xchg %ax,%ax
Code starting with the faulting instruction
===========================================
0: f3 ab rep stos %eax,%es:(%rdi)
2: 89 d1 mov %edx,%ecx
4: f3 aa rep stos %al,%es:(%rdi)
6: 8b 44 24 08 mov 0x8(%rsp),%eax
a: 5f pop %rdi
b: c3 ret
c: 66 90 xchg %ax,%ax
e: 66 90 xchg %ax,%ax
10: 66 90 xchg %ax,%ax
12: 66 90 xchg %ax,%ax
14: 66 90 xchg %ax,%ax
[ 19.231735][ T64] RSP: 002b:00000000fffd4f58 EFLAGS: 00010206
[ 19.231741][ T64] RAX: 0000000000000000 RBX: 00000000f7f11000 RCX: 0000000000000001
[ 19.231745][ T64] RDX: 0000000000000000 RSI: 00000000f7edf148 RDI: 00000000f7edf144
[ 19.231749][ T64] RBP: 00000000fffd5138 R08: 0000000000000000 R09: 0000000000000000
[ 19.231753][ T64] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.231756][ T64] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.231771][ T64] </TASK>
[ 19.251371][ T64] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/64
[ 19.252249][ T64] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.252877][ T64] CPU: 0 UID: 0 PID: 64 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.252886][ T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.252890][ T64] Call Trace:
[ 19.252892][ T64] <TASK>
[ 19.252895][ T64] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.252907][ T64] dump_stack (lib/dump_stack.c:130)
[ 19.252916][ T64] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.252925][ T64] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.252931][ T64] task_cache_work (kernel/sched/fair.c:1422)
[ 19.252941][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.252953][ T64] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.252963][ T64] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.252969][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.252976][ T64] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.252985][ T64] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.252994][ T64] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.253006][ T64] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.253018][ T64] exit_to_user_mode_loop (kernel/entry/common.c:124)
[ 19.253025][ T64] do_int80_emulation (include/linux/entry-common.h:332 include/linux/entry-common.h:414 include/linux/entry-common.h:449 arch/x86/entry/syscall_32.c:175)
[ 19.253035][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.253044][ T64] ? preempt_latency_start (include/linux/ftrace.h:1091 kernel/sched/core.c:5866)
[ 19.253055][ T64] ? __up_write (arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1375)
[ 19.253061][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.253070][ T64] ? validate_chain (kernel/locking/lockdep.c:3826 kernel/locking/lockdep.c:3879)
[ 19.253081][ T64] ? __lock_acquire (kernel/locking/lockdep.c:5240)
[ 19.253093][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.253106][ T64] ? validate_chain (kernel/locking/lockdep.c:3826 kernel/locking/lockdep.c:3879)
[ 19.253117][ T64] ? __lock_acquire (kernel/locking/lockdep.c:5240)
[ 19.253128][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.253138][ T64] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.253149][ T64] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.253159][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.253170][ T64] ? debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.253177][ T64] ? rcu_is_watching (include/linux/context_tracking.h:128 kernel/rcu/tree.c:745)
[ 19.253185][ T64] ? trace_irq_disable (include/trace/events/preemptirq.h:36 (discriminator 21))
[ 19.253195][ T64] ? trace_hardirqs_off_finish (kernel/trace/trace_preemptirq.c:98)
[ 19.253203][ T64] ? do_int80_emulation (arch/x86/include/asm/jump_label.h:36 arch/x86/entry/syscall_32.c:148)
[ 19.253212][ T64] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626)
[ 19.253218][ T64] RIP: 0023:0xf7f02cb0
[ 19.253223][ T64] Code: 4c 24 34 89 44 24 0c 8b 44 24 44 8b 54 24 38 8b 74 24 3c 8b 7c 24 40 a9 ff 0f 00 00 75 1c c1 e8 0c 89 c5 b8 c0 00 00 00 cd 80 <3d> 00 f0 ff ff 77 21 83 c4 1c 5b 5e 5f 5d c3 90 83 c4 1c b8 ea ff
All code
========
0: 4c 24 34 rex.WR and $0x34,%al
3: 89 44 24 0c mov %eax,0xc(%rsp)
7: 8b 44 24 44 mov 0x44(%rsp),%eax
b: 8b 54 24 38 mov 0x38(%rsp),%edx
f: 8b 74 24 3c mov 0x3c(%rsp),%esi
13: 8b 7c 24 40 mov 0x40(%rsp),%edi
17: a9 ff 0f 00 00 test $0xfff,%eax
1c: 75 1c jne 0x3a
1e: c1 e8 0c shr $0xc,%eax
21: 89 c5 mov %eax,%ebp
23: b8 c0 00 00 00 mov $0xc0,%eax
28: cd 80 int $0x80
2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction
2f: 77 21 ja 0x52
31: 83 c4 1c add $0x1c,%esp
34: 5b pop %rbx
35: 5e pop %rsi
36: 5f pop %rdi
37: 5d pop %rbp
38: c3 ret
39: 90 nop
3a: 83 c4 1c add $0x1c,%esp
3d: b8 .byte 0xb8
3e: ea (bad)
3f: ff .byte 0xff
Code starting with the faulting instruction
===========================================
0: 3d 00 f0 ff ff cmp $0xfffff000,%eax
5: 77 21 ja 0x28
7: 83 c4 1c add $0x1c,%esp
a: 5b pop %rbx
b: 5e pop %rsi
c: 5f pop %rdi
d: 5d pop %rbp
e: c3 ret
f: 90 nop
10: 83 c4 1c add $0x1c,%esp
13: b8 .byte 0xb8
14: ea (bad)
15: ff .byte 0xff
[ 19.253229][ T64] RSP: 002b:00000000fffd4f00 EFLAGS: 00000202 ORIG_RAX: 00000000000000c0
[ 19.253236][ T64] RAX: 00000000f7db9000 RBX: 00000000f7db9000 RCX: 00000000000da000
[ 19.253240][ T64] RDX: 0000000000000001 RSI: 0000000000000812 RDI: 0000000000000000
[ 19.253244][ T64] RBP: 00000000000001ce R08: 0000000000000000 R09: 0000000000000000
[ 19.253248][ T64] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.253251][ T64] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.253266][ T64] </TASK>
[ 19.256786][ T64] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/64
[ 19.304780][ T64] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.305760][ T64] CPU: 1 UID: 0 PID: 64 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.305774][ T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.305782][ T64] Call Trace:
[ 19.305787][ T64] <TASK>
[ 19.305795][ T64] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.305817][ T64] dump_stack (lib/dump_stack.c:130)
[ 19.305832][ T64] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.305849][ T64] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.305862][ T64] task_cache_work (kernel/sched/fair.c:1422)
[ 19.305881][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.305903][ T64] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.305921][ T64] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.305931][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.305944][ T64] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.305962][ T64] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.305980][ T64] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.306002][ T64] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.306023][ T64] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.306039][ T64] irqentry_exit (kernel/entry/common.c:287)
[ 19.306050][ T64] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.306072][ T64] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.306083][ T64] RIP: 0023:0xf7db80cb
[ 19.306094][ T64] Code: 01 00 00 00 83 c4 08 5b c3 66 90 66 90 66 90 55 53 56 57 31 d2 9c 58 89 c1 35 00 00 20 00 50 9d 9c 58 31 c1 31 c0 8b 74 24 14 <89> 46 08 0f ba e1 15 0f 83 6b 01 00 00 0f a2 89 c7 31 c0 81 fb 47
All code
========
0: 01 00 add %eax,(%rax)
2: 00 00 add %al,(%rax)
4: 83 c4 08 add $0x8,%esp
7: 5b pop %rbx
8: c3 ret
9: 66 90 xchg %ax,%ax
b: 66 90 xchg %ax,%ax
d: 66 90 xchg %ax,%ax
f: 55 push %rbp
10: 53 push %rbx
11: 56 push %rsi
12: 57 push %rdi
13: 31 d2 xor %edx,%edx
15: 9c pushf
16: 58 pop %rax
17: 89 c1 mov %eax,%ecx
19: 35 00 00 20 00 xor $0x200000,%eax
1e: 50 push %rax
1f: 9d popf
20: 9c pushf
21: 58 pop %rax
22: 31 c1 xor %eax,%ecx
24: 31 c0 xor %eax,%eax
26: 8b 74 24 14 mov 0x14(%rsp),%esi
2a:* 89 46 08 mov %eax,0x8(%rsi) <-- trapping instruction
2d: 0f ba e1 15 bt $0x15,%ecx
31: 0f 83 6b 01 00 00 jae 0x1a2
37: 0f a2 cpuid
39: 89 c7 mov %eax,%edi
3b: 31 c0 xor %eax,%eax
3d: 81 .byte 0x81
3e: fb sti
3f: 47 rex.RXB
Code starting with the faulting instruction
===========================================
0: 89 46 08 mov %eax,0x8(%rsi)
3: 0f ba e1 15 bt $0x15,%ecx
7: 0f 83 6b 01 00 00 jae 0x178
d: 0f a2 cpuid
f: 89 c7 mov %eax,%edi
11: 31 c0 xor %eax,%eax
13: 81 .byte 0x81
14: fb sti
15: 47 rex.RXB
[ 19.306104][ T64] RSP: 002b:00000000fffd5bd8 EFLAGS: 00210246
[ 19.306115][ T64] RAX: 0000000000000000 RBX: 00000000f7eac684 RCX: 0000000000200000
[ 19.306123][ T64] RDX: 0000000000000000 RSI: 00000000f7eb3ad0 RDI: 00000000f7eb3ad0
[ 19.306131][ T64] RBP: 00000000f7eac684 R08: 0000000000000000 R09: 0000000000000000
[ 19.306138][ T64] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.306145][ T64] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.306175][ T64] </TASK>
[ 19.328981][ T64] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/64
[ 19.329865][ T64] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.330477][ T64] CPU: 1 UID: 0 PID: 64 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.330486][ T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.330490][ T64] Call Trace:
[ 19.330492][ T64] <TASK>
[ 19.330495][ T64] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.330508][ T64] dump_stack (lib/dump_stack.c:130)
[ 19.330516][ T64] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.330525][ T64] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.330531][ T64] task_cache_work (kernel/sched/fair.c:1422)
[ 19.330541][ T64] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.330553][ T64] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.330564][ T64] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.330569][ T64] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.330576][ T64] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.330586][ T64] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.330595][ T64] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.330606][ T64] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.330618][ T64] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.330626][ T64] irqentry_exit (kernel/entry/common.c:287)
[ 19.330632][ T64] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.330644][ T64] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.330650][ T64] RIP: 0023:0xf7a9f4c0
[ 19.330656][ T64] Code: 57 8d 1c 06 e8 21 0d 00 00 83 c4 0c c6 04 03 00 50 57 53 89 eb e8 70 15 00 00 83 c4 1c 89 f0 5b 5e 5f 5d c3 66 90 66 90 66 90 <57> 8b 4c 24 08 66 0f 6e 4c 24 0c 66 0f ef d2 89 cf 66 0f 60 c9 66
All code
========
0: 57 push %rdi
1: 8d 1c 06 lea (%rsi,%rax,1),%ebx
4: e8 21 0d 00 00 call 0xd2a
9: 83 c4 0c add $0xc,%esp
c: c6 04 03 00 movb $0x0,(%rbx,%rax,1)
10: 50 push %rax
11: 57 push %rdi
12: 53 push %rbx
13: 89 eb mov %ebp,%ebx
15: e8 70 15 00 00 call 0x158a
1a: 83 c4 1c add $0x1c,%esp
1d: 89 f0 mov %esi,%eax
1f: 5b pop %rbx
20: 5e pop %rsi
21: 5f pop %rdi
22: 5d pop %rbp
23: c3 ret
24: 66 90 xchg %ax,%ax
26: 66 90 xchg %ax,%ax
28: 66 90 xchg %ax,%ax
2a:* 57 push %rdi <-- trapping instruction
2b: 8b 4c 24 08 mov 0x8(%rsp),%ecx
2f: 66 0f 6e 4c 24 0c movd 0xc(%rsp),%xmm1
35: 66 0f ef d2 pxor %xmm2,%xmm2
39: 89 cf mov %ecx,%edi
3b: 66 0f 60 c9 punpcklbw %xmm1,%xmm1
3f: 66 data16
Code starting with the faulting instruction
===========================================
0: 57 push %rdi
1: 8b 4c 24 08 mov 0x8(%rsp),%ecx
5: 66 0f 6e 4c 24 0c movd 0xc(%rsp),%xmm1
b: 66 0f ef d2 pxor %xmm2,%xmm2
f: 89 cf mov %ecx,%edi
11: 66 0f 60 c9 punpcklbw %xmm1,%xmm1
15: 66 data16
[ 19.330662][ T64] RSP: 002b:00000000fffd38cc EFLAGS: 00210246
[ 19.330667][ T64] RAX: 0000000000000000 RBX: 00000000565dbdd4 RCX: 00000000fffd49a8
[ 19.330671][ T64] RDX: 0000000000000000 RSI: 00000000fffd394c RDI: 000000005799e1f0
[ 19.330675][ T64] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 19.330679][ T64] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.330682][ T64] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.330697][ T64] </TASK>
[ 19.332542][ T64] modprobe (64) used greatest stack depth: 25120 bytes left
[ 19.344814][ T65] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/65
[ 19.360113][ T65] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.361051][ T65] CPU: 0 UID: 0 PID: 65 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.361065][ T65] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.361071][ T65] Call Trace:
[ 19.361074][ T65] <TASK>
[ 19.361079][ T65] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.361099][ T65] dump_stack (lib/dump_stack.c:130)
[ 19.361111][ T65] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.361125][ T65] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.361136][ T65] task_cache_work (kernel/sched/fair.c:1422)
[ 19.361144][ T65] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.361162][ T65] ? lock_is_held (include/linux/lockdep.h:249)
[ 19.361175][ T65] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.361191][ T65] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.361199][ T65] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.361210][ T65] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.361225][ T65] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.361238][ T65] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.361256][ T65] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.361273][ T65] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.361286][ T65] irqentry_exit (kernel/entry/common.c:287)
[ 19.361295][ T65] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.361313][ T65] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.361322][ T65] RIP: 0023:0xf7f7b148
[ 19.361330][ T65] Code: bb 41 ff ff 6f 29 d3 89 04 99 e9 f1 fe ff ff 8b b5 74 ff ff ff 85 f6 74 60 8b 47 30 85 c0 74 03 01 70 04 8b 47 2c 85 c0 74 03 <01> 70 04 8b 47 34 85 c0 74 03 01 70 04 8b 47 38 85 c0 74 03 01 70
All code
========
0: bb 41 ff ff 6f mov $0x6fffff41,%ebx
5: 29 d3 sub %edx,%ebx
7: 89 04 99 mov %eax,(%rcx,%rbx,4)
a: e9 f1 fe ff ff jmp 0xffffffffffffff00
f: 8b b5 74 ff ff ff mov -0x8c(%rbp),%esi
15: 85 f6 test %esi,%esi
17: 74 60 je 0x79
19: 8b 47 30 mov 0x30(%rdi),%eax
1c: 85 c0 test %eax,%eax
1e: 74 03 je 0x23
20: 01 70 04 add %esi,0x4(%rax)
23: 8b 47 2c mov 0x2c(%rdi),%eax
26: 85 c0 test %eax,%eax
28: 74 03 je 0x2d
2a:* 01 70 04 add %esi,0x4(%rax) <-- trapping instruction
2d: 8b 47 34 mov 0x34(%rdi),%eax
30: 85 c0 test %eax,%eax
32: 74 03 je 0x37
34: 01 70 04 add %esi,0x4(%rax)
37: 8b 47 38 mov 0x38(%rdi),%eax
3a: 85 c0 test %eax,%eax
3c: 74 03 je 0x41
3e: 01 .byte 0x1
3f: 70 .byte 0x70
Code starting with the faulting instruction
===========================================
0: 01 70 04 add %esi,0x4(%rax)
3: 8b 47 34 mov 0x34(%rdi),%eax
6: 85 c0 test %eax,%eax
8: 74 03 je 0xd
a: 01 70 04 add %esi,0x4(%rax)
d: 8b 47 38 mov 0x38(%rdi),%eax
10: 85 c0 test %eax,%eax
12: 74 03 je 0x17
14: 01 .byte 0x1
15: 70 .byte 0x70
[ 19.361339][ T65] RSP: 002b:00000000ffdeddc0 EFLAGS: 00010286
[ 19.361348][ T65] RAX: 00000000f7f395e4 RBX: 0000000000000028 RCX: 00000000f7f6d310
[ 19.361355][ T65] RDX: 0000000000000000 RSI: 00000000f7c78000 RDI: 00000000f7f6d2f0
[ 19.361361][ T65] RBP: 00000000ffdedea8 R08: 0000000000000000 R09: 0000000000000000
[ 19.361367][ T65] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.361372][ T65] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.361395][ T65] </TASK>
[ 19.405251][ T65] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/65
[ 19.406850][ T65] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.407947][ T65] CPU: 0 UID: 0 PID: 65 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.407964][ T65] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.407972][ T65] Call Trace:
[ 19.407977][ T65] <TASK>
[ 19.407984][ T65] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.408010][ T65] dump_stack (lib/dump_stack.c:130)
[ 19.408027][ T65] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.408048][ T65] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.408062][ T65] task_cache_work (kernel/sched/fair.c:1422)
[ 19.408083][ T65] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.408108][ T65] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.408130][ T65] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.408141][ T65] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.408155][ T65] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.408182][ T65] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.408198][ T65] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.408211][ T65] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.408225][ T65] irqentry_exit_to_user_mode (kernel/entry/common.c:124 include/linux/entry-common.h:330 kernel/entry/common.c:184)
[ 19.408235][ T65] irqentry_exit (kernel/entry/common.c:287)
[ 19.408242][ T65] exc_page_fault (arch/x86/mm/fault.c:1536)
[ 19.408256][ T65] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 19.408264][ T65] RIP: 0023:0xf7b9cca0
[ 19.408271][ T65] Code: 04 00 00 00 c7 44 24 2c 03 00 00 00 e9 3a fe ff ff e8 a4 1e 00 00 66 90 66 90 c3 66 90 66 90 66 90 66 90 66 90 66 90 66 90 90 <e8> 14 01 03 00 05 5b 73 0d 00 53 8b 88 f4 fe ff ff 8d 90 e0 38 f6
All code
========
0: 04 00 add $0x0,%al
2: 00 00 add %al,(%rax)
4: c7 44 24 2c 03 00 00 movl $0x3,0x2c(%rsp)
b: 00
c: e9 3a fe ff ff jmp 0xfffffffffffffe4b
11: e8 a4 1e 00 00 call 0x1eba
16: 66 90 xchg %ax,%ax
18: 66 90 xchg %ax,%ax
1a: c3 ret
1b: 66 90 xchg %ax,%ax
1d: 66 90 xchg %ax,%ax
1f: 66 90 xchg %ax,%ax
21: 66 90 xchg %ax,%ax
23: 66 90 xchg %ax,%ax
25: 66 90 xchg %ax,%ax
27: 66 90 xchg %ax,%ax
29: 90 nop
2a:* e8 14 01 03 00 call 0x30143 <-- trapping instruction
2f: 05 5b 73 0d 00 add $0xd735b,%eax
34: 53 push %rbx
35: 8b 88 f4 fe ff ff mov -0x10c(%rax),%ecx
3b: 8d .byte 0x8d
3c: 90 nop
3d: e0 38 loopne 0x77
3f: f6 .byte 0xf6
Code starting with the faulting instruction
===========================================
0: e8 14 01 03 00 call 0x30119
5: 05 5b 73 0d 00 add $0xd735b,%eax
a: 53 push %rbx
b: 8b 88 f4 fe ff ff mov -0x10c(%rax),%ecx
11: 8d .byte 0x8d
12: 90 nop
13: e0 38 loopne 0x4d
15: f6 .byte 0xf6
[ 19.408277][ T65] RSP: 002b:00000000ffdee69c EFLAGS: 00010202
[ 19.408285][ T65] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00000000f7f6d5d0
[ 19.408289][ T65] RDX: 0000000000000015 RSI: 00000000f7c81904 RDI: 00000000f7b9cca0
[ 19.408294][ T65] RBP: 00000000ffdee738 R08: 0000000000000000 R09: 0000000000000000
[ 19.408299][ T65] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.408303][ T65] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.408320][ T65] </TASK>
[ 19.430721][ T65] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/65
[ 19.431596][ T65] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.432219][ T65] CPU: 0 UID: 0 PID: 65 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.432227][ T65] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.432232][ T65] Call Trace:
[ 19.432234][ T65] <TASK>
[ 19.432237][ T65] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.432250][ T65] dump_stack (lib/dump_stack.c:130)
[ 19.432258][ T65] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.432267][ T65] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.432274][ T65] task_cache_work (kernel/sched/fair.c:1422)
[ 19.432283][ T65] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.432295][ T65] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.432306][ T65] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.432311][ T65] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.432318][ T65] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.432327][ T65] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.432336][ T65] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.432348][ T65] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.432359][ T65] exit_to_user_mode_loop (kernel/entry/common.c:124)
[ 19.432367][ T65] do_int80_emulation (include/linux/entry-common.h:332 include/linux/entry-common.h:414 include/linux/entry-common.h:449 arch/x86/entry/syscall_32.c:175)
[ 19.432375][ T65] ? rcu_read_unlock (include/linux/rcupdate.h:874 (discriminator 9))
[ 19.432381][ T65] ? do_read_fault (mm/memory.c:5600)
[ 19.432394][ T65] ? do_pte_missing (mm/memory.c:4252)
[ 19.432401][ T65] ? handle_pte_fault (mm/memory.c:6069)
[ 19.432412][ T65] ? handle_pte_fault (mm/memory.c:6026)
[ 19.432421][ T65] ? __pfx_handle_pte_fault (mm/memory.c:6026)
[ 19.432430][ T65] ? validate_chain (kernel/locking/lockdep.c:3826 kernel/locking/lockdep.c:3879)
[ 19.432439][ T65] ? validate_chain (kernel/locking/lockdep.c:3826 kernel/locking/lockdep.c:3879)
[ 19.432449][ T65] ? __lock_acquire (kernel/locking/lockdep.c:5240)
[ 19.432461][ T65] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.432471][ T65] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.432482][ T65] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.432492][ T65] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.432504][ T65] ? debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.432510][ T65] ? rcu_is_watching (include/linux/context_tracking.h:128 kernel/rcu/tree.c:745)
[ 19.432519][ T65] ? trace_irq_disable (include/trace/events/preemptirq.h:36 (discriminator 21))
[ 19.432529][ T65] ? trace_hardirqs_off_finish (kernel/trace/trace_preemptirq.c:98)
[ 19.432537][ T65] ? do_int80_emulation (arch/x86/include/asm/jump_label.h:36 arch/x86/entry/syscall_32.c:148)
[ 19.432546][ T65] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626)
[ 19.432552][ T65] RIP: 0023:0xf7f8fd24
[ 19.432558][ T65] Code: b8 5b 00 00 00 cd 80 89 d3 3d 01 f0 ff ff 0f 83 b2 ef ff ff c3 90 53 8b 54 24 10 8b 4c 24 0c 8b 5c 24 08 b8 7d 00 00 00 cd 80 <5b> 3d 01 f0 ff ff 0f 83 90 ef ff ff c3 66 90 66 90 66 90 66 90 66
All code
========
0: b8 5b 00 00 00 mov $0x5b,%eax
5: cd 80 int $0x80
7: 89 d3 mov %edx,%ebx
9: 3d 01 f0 ff ff cmp $0xfffff001,%eax
e: 0f 83 b2 ef ff ff jae 0xffffffffffffefc6
14: c3 ret
15: 90 nop
16: 53 push %rbx
17: 8b 54 24 10 mov 0x10(%rsp),%edx
1b: 8b 4c 24 0c mov 0xc(%rsp),%ecx
1f: 8b 5c 24 08 mov 0x8(%rsp),%ebx
23: b8 7d 00 00 00 mov $0x7d,%eax
28: cd 80 int $0x80
2a:* 5b pop %rbx <-- trapping instruction
2b: 3d 01 f0 ff ff cmp $0xfffff001,%eax
30: 0f 83 90 ef ff ff jae 0xffffffffffffefc6
36: c3 ret
37: 66 90 xchg %ax,%ax
39: 66 90 xchg %ax,%ax
3b: 66 90 xchg %ax,%ax
3d: 66 90 xchg %ax,%ax
3f: 66 data16
Code starting with the faulting instruction
===========================================
0: 5b pop %rbx
1: 3d 01 f0 ff ff cmp $0xfffff001,%eax
6: 0f 83 90 ef ff ff jae 0xffffffffffffef9c
c: c3 ret
d: 66 90 xchg %ax,%ax
f: 66 90 xchg %ax,%ax
11: 66 90 xchg %ax,%ax
13: 66 90 xchg %ax,%ax
15: 66 data16
[ 19.432564][ T65] RSP: 002b:00000000ffdee668 EFLAGS: 00000206 ORIG_RAX: 000000000000007d
[ 19.432571][ T65] RAX: 0000000000000000 RBX: 00000000f7f21000 RCX: 000000000001b000
[ 19.432575][ T65] RDX: 0000000000000001 RSI: 00000000f7f9e000 RDI: 00000000f7f6d2f0
[ 19.432579][ T65] RBP: 00000000ffdee738 R08: 0000000000000000 R09: 0000000000000000
[ 19.432583][ T65] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.432586][ T65] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.432601][ T65] </TASK>
[ 19.477057][ T66] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/66
[ 19.481747][ T66] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.484904][ T66] CPU: 1 UID: 0 PID: 66 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.484945][ T66] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.484963][ T66] Call Trace:
[ 19.484975][ T66] <TASK>
[ 19.484991][ T66] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.485052][ T66] dump_stack (lib/dump_stack.c:130)
[ 19.485092][ T66] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.485139][ T66] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.485176][ T66] task_cache_work (kernel/sched/fair.c:1422)
[ 19.485202][ T66] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.485264][ T66] ? lock_is_held (include/linux/lockdep.h:249)
[ 19.485307][ T66] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.485357][ T66] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.485384][ T66] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.485418][ T66] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.485468][ T66] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.485513][ T66] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.485550][ T66] ? preempt_latency_start (include/linux/ftrace.h:1091 kernel/sched/core.c:5866)
[ 19.485607][ T66] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.485660][ T66] exit_to_user_mode_loop (kernel/entry/common.c:124)
[ 19.485700][ T66] do_int80_emulation (include/linux/entry-common.h:332 include/linux/entry-common.h:414 include/linux/entry-common.h:449 arch/x86/entry/syscall_32.c:175)
[ 19.485758][ T66] ? __lock_acquire (kernel/locking/lockdep.c:5240)
[ 19.485821][ T66] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.485871][ T66] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.485924][ T66] ? vtime_user_exit (kernel/sched/cputime.c:737)
[ 19.485976][ T66] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.486035][ T66] ? debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.486070][ T66] ? rcu_is_watching (include/linux/context_tracking.h:128 kernel/rcu/tree.c:745)
[ 19.486111][ T66] ? trace_irq_disable (include/trace/events/preemptirq.h:36 (discriminator 21))
[ 19.486159][ T66] ? trace_hardirqs_off_finish (kernel/trace/trace_preemptirq.c:98)
[ 19.486198][ T66] ? do_int80_emulation (arch/x86/include/asm/jump_label.h:36 arch/x86/entry/syscall_32.c:148)
[ 19.486244][ T66] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626)
[ 19.486274][ T66] RIP: 0023:0xf7f82cb0
[ 19.486300][ T66] Code: 4c 24 34 89 44 24 0c 8b 44 24 44 8b 54 24 38 8b 74 24 3c 8b 7c 24 40 a9 ff 0f 00 00 75 1c c1 e8 0c 89 c5 b8 c0 00 00 00 cd 80 <3d> 00 f0 ff ff 77 21 83 c4 1c 5b 5e 5f 5d c3 90 83 c4 1c b8 ea ff
All code
========
0: 4c 24 34 rex.WR and $0x34,%al
3: 89 44 24 0c mov %eax,0xc(%rsp)
7: 8b 44 24 44 mov 0x44(%rsp),%eax
b: 8b 54 24 38 mov 0x38(%rsp),%edx
f: 8b 74 24 3c mov 0x3c(%rsp),%esi
13: 8b 7c 24 40 mov 0x40(%rsp),%edi
17: a9 ff 0f 00 00 test $0xfff,%eax
1c: 75 1c jne 0x3a
1e: c1 e8 0c shr $0xc,%eax
21: 89 c5 mov %eax,%ebp
23: b8 c0 00 00 00 mov $0xc0,%eax
28: cd 80 int $0x80
2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction
2f: 77 21 ja 0x52
31: 83 c4 1c add $0x1c,%esp
34: 5b pop %rbx
35: 5e pop %rsi
36: 5f pop %rdi
37: 5d pop %rbp
38: c3 ret
39: 90 nop
3a: 83 c4 1c add $0x1c,%esp
3d: b8 .byte 0xb8
3e: ea (bad)
3f: ff .byte 0xff
Code starting with the faulting instruction
===========================================
0: 3d 00 f0 ff ff cmp $0xfffff000,%eax
5: 77 21 ja 0x28
7: 83 c4 1c add $0x1c,%esp
a: 5b pop %rbx
b: 5e pop %rsi
c: 5f pop %rdi
d: 5d pop %rbp
e: c3 ret
f: 90 nop
10: 83 c4 1c add $0x1c,%esp
13: b8 .byte 0xb8
14: ea (bad)
15: ff .byte 0xff
[ 19.486327][ T66] RSP: 002b:00000000ff907830 EFLAGS: 00000246 ORIG_RAX: 00000000000000c0
[ 19.486359][ T66] RAX: 00000000f7f34000 RBX: 0000000000000000 RCX: 000000000002b148
[ 19.486380][ T66] RDX: 0000000000000001 RSI: 0000000000000802 RDI: 0000000000000000
[ 19.486399][ T66] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 19.486418][ T66] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.486437][ T66] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.486519][ T66] </TASK>
[ 19.544246][ T66] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/66
[ 19.545273][ T66] caller is debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.545971][ T66] CPU: 1 UID: 0 PID: 66 Comm: modprobe Not tainted 6.16.0-00023-gff797757d658 #1 PREEMPT(none)
[ 19.545981][ T66] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 19.545985][ T66] Call Trace:
[ 19.545988][ T66] <TASK>
[ 19.545992][ T66] dump_stack_lvl (lib/dump_stack.c:123)
[ 19.546007][ T66] dump_stack (lib/dump_stack.c:130)
[ 19.546016][ T66] check_preemption_disabled (arch/x86/include/asm/preempt.h:85 lib/smp_processor_id.c:53)
[ 19.546027][ T66] debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.546035][ T66] task_cache_work (kernel/sched/fair.c:1422)
[ 19.546046][ T66] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 19.546060][ T66] ? _raw_spin_unlock_irq (arch/x86/include/asm/paravirt.h:671 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 19.546072][ T66] ? __pfx_task_cache_work (kernel/sched/fair.c:1416)
[ 19.546078][ T66] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67)
[ 19.546086][ T66] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475)
[ 19.546098][ T66] task_work_run (kernel/task_work.c:228 (discriminator 1))
[ 19.546108][ T66] ? __pfx_task_work_run (kernel/task_work.c:195)
[ 19.546122][ T66] resume_user_mode_work (arch/x86/include/asm/current.h:25 include/linux/resume_user_mode.h:53)
[ 19.546135][ T66] exit_to_user_mode_loop (kernel/entry/common.c:124)
[ 19.546144][ T66] do_int80_emulation (include/linux/entry-common.h:332 include/linux/entry-common.h:414 include/linux/entry-common.h:449 arch/x86/entry/syscall_32.c:175)
[ 19.546155][ T66] ? debug_smp_processor_id (lib/smp_processor_id.c:61)
[ 19.546163][ T66] ? rcu_is_watching (include/linux/context_tracking.h:128 kernel/rcu/tree.c:745)
[ 19.546173][ T66] ? trace_irq_disable (include/trace/events/preemptirq.h:36 (discriminator 21))
[ 19.546184][ T66] ? trace_hardirqs_off_finish (kernel/trace/trace_preemptirq.c:98)
[ 19.546193][ T66] ? do_int80_emulation (arch/x86/include/asm/jump_label.h:36 arch/x86/entry/syscall_32.c:148)
[ 19.546203][ T66] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626)
[ 19.546211][ T66] RIP: 0023:0xf7f82cb0
[ 19.546218][ T66] Code: 4c 24 34 89 44 24 0c 8b 44 24 44 8b 54 24 38 8b 74 24 3c 8b 7c 24 40 a9 ff 0f 00 00 75 1c c1 e8 0c 89 c5 b8 c0 00 00 00 cd 80 <3d> 00 f0 ff ff 77 21 83 c4 1c 5b 5e 5f 5d c3 90 83 c4 1c b8 ea ff
All code
========
0: 4c 24 34 rex.WR and $0x34,%al
3: 89 44 24 0c mov %eax,0xc(%rsp)
7: 8b 44 24 44 mov 0x44(%rsp),%eax
b: 8b 54 24 38 mov 0x38(%rsp),%edx
f: 8b 74 24 3c mov 0x3c(%rsp),%esi
13: 8b 7c 24 40 mov 0x40(%rsp),%edi
17: a9 ff 0f 00 00 test $0xfff,%eax
1c: 75 1c jne 0x3a
1e: c1 e8 0c shr $0xc,%eax
21: 89 c5 mov %eax,%ebp
23: b8 c0 00 00 00 mov $0xc0,%eax
28: cd 80 int $0x80
2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction
2f: 77 21 ja 0x52
31: 83 c4 1c add $0x1c,%esp
34: 5b pop %rbx
35: 5e pop %rsi
36: 5f pop %rdi
37: 5d pop %rbp
38: c3 ret
39: 90 nop
3a: 83 c4 1c add $0x1c,%esp
3d: b8 .byte 0xb8
3e: ea (bad)
3f: ff .byte 0xff
Code starting with the faulting instruction
===========================================
0: 3d 00 f0 ff ff cmp $0xfffff000,%eax
5: 77 21 ja 0x28
7: 83 c4 1c add $0x1c,%esp
a: 5b pop %rbx
b: 5e pop %rsi
c: 5f pop %rdi
d: 5d pop %rbp
e: c3 ret
f: 90 nop
10: 83 c4 1c add $0x1c,%esp
13: b8 .byte 0xb8
14: ea (bad)
15: ff .byte 0xff
[ 19.546225][ T66] RSP: 002b:00000000ff907810 EFLAGS: 00000246 ORIG_RAX: 00000000000000c0
[ 19.546233][ T66] RAX: 00000000f7c6b000 RBX: 0000000000000000 RCX: 00000000002c8ae0
[ 19.546238][ T66] RDX: 0000000000000001 RSI: 0000000000000802 RDI: 0000000000000000
[ 19.546243][ T66] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 19.546247][ T66] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 19.546252][ T66] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 19.546269][ T66] </TASK>
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250812/202508120315.19f6266a-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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