Hello,
kernel test robot noticed "kernel_BUG_at_mm/usercopy.c" on:
commit: 81106b7e0b136e96a4116efdd5fe3df2b6a478b9 ("x86/fpu: Make task_struct::thread constant size")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/fpu
in testcase: boot
compiler: gcc-13
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+------------------------------------------+------------+------------+
| | c822542ba0 | 81106b7e0b |
+------------------------------------------+------------+------------+
| boot_successes | 6 | 0 |
| boot_failures | 0 | 6 |
| kernel_BUG_at_mm/usercopy.c | 0 | 6 |
| Oops:invalid_opcode:#[##]PREEMPT | 0 | 6 |
| EIP:usercopy_abort | 0 | 6 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 6 |
+------------------------------------------+------------+------------+
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 <[email protected]>
| Closes: https://lore.kernel.org/oe-lkp/[email protected]
[ 22.451041][ T128] ------------[ cut here ]------------
[ 22.451886][ T128] kernel BUG at mm/usercopy.c:102!
[ 22.452684][ T128] Oops: invalid opcode: 0000 [#1] PREEMPT
[ 22.453567][ T128] CPU: 0 PID: 128 Comm: nfs-utils_env.s Not tainted 6.10.0-rc3-00003-g81106b7e0b13 #1
[ 22.454983][ T128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 22.456474][ T128] EIP: usercopy_abort (mm/usercopy.c:102)
[ 22.457246][ T128] Code: c9 89 44 24 0c 0f 45 cb 8b 5d 0c 89 74 24 10 89 4c 24 04 c7 04 24 50 bc 5e c9 89 5c 24 20 8b 5d 08 89 5c 24 1c e8 87 03 df ff <0f> 0b b8 94 16 bd c9 e8 fb b8 7c 00 ba b2 dd 53 c9 89 55 f0 89 d6
All code
========
0: c9 leave
1: 89 44 24 0c mov %eax,0xc(%rsp)
5: 0f 45 cb cmovne %ebx,%ecx
8: 8b 5d 0c mov 0xc(%rbp),%ebx
b: 89 74 24 10 mov %esi,0x10(%rsp)
f: 89 4c 24 04 mov %ecx,0x4(%rsp)
13: c7 04 24 50 bc 5e c9 movl $0xc95ebc50,(%rsp)
1a: 89 5c 24 20 mov %ebx,0x20(%rsp)
1e: 8b 5d 08 mov 0x8(%rbp),%ebx
21: 89 5c 24 1c mov %ebx,0x1c(%rsp)
25: e8 87 03 df ff call 0xffffffffffdf03b1
2a:* 0f 0b ud2 <-- trapping instruction
2c: b8 94 16 bd c9 mov $0xc9bd1694,%eax
31: e8 fb b8 7c 00 call 0x7cb931
36: ba b2 dd 53 c9 mov $0xc953ddb2,%edx
3b: 89 55 f0 mov %edx,-0x10(%rbp)
3e: 89 d6 mov %edx,%esi
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: b8 94 16 bd c9 mov $0xc9bd1694,%eax
7: e8 fb b8 7c 00 call 0x7cb907
c: ba b2 dd 53 c9 mov $0xc953ddb2,%edx
11: 89 55 f0 mov %edx,-0x10(%rbp)
14: 89 d6 mov %edx,%esi
[ 22.459949][ T128] EAX: 00000068 EBX: 00001640 ECX: 00000000 EDX: 00000000
[ 22.460949][ T128] ESI: c94cf3fb EDI: c94dc8a4 EBP: ec1f3c6c ESP: ec1f3c38
[ 22.461961][ T128] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010246
[ 22.463133][ T128] CR0: 80050033 CR2: 0062807c CR3: 2c016aa0 CR4: 000406f0
[ 22.464147][ T128] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 22.465130][ T128] DR6: fffe0ff0 DR7: 00000400
[ 22.465875][ T128] Call Trace:
[ 22.466464][ T128] ? show_regs (arch/x86/kernel/dumpstack.c:479)
[ 22.467142][ T128] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 22.467764][ T128] ? do_trap (arch/x86/kernel/traps.c:114 arch/x86/kernel/traps.c:155)
[ 22.468412][ T128] ? do_error_trap (arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:176)
[ 22.469115][ T128] ? usercopy_abort (mm/usercopy.c:102)
[ 22.469833][ T128] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 22.470522][ T128] ? exc_invalid_op (arch/x86/kernel/traps.c:267)
[ 22.471267][ T128] ? usercopy_abort (mm/usercopy.c:102)
[ 22.484908][ T128] ? handle_exception (arch/x86/entry/entry_32.S:1047)
[ 22.485714][ T128] ? cpu_latency_qos_update_request (kernel/power/qos.c:311)
[ 22.486588][ T128] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 22.487277][ T128] ? usercopy_abort (mm/usercopy.c:102)
[ 22.487991][ T128] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 22.488682][ T128] ? usercopy_abort (mm/usercopy.c:102)
[ 22.489399][ T128] __check_heap_object (mm/slub.c:5509)
[ 22.490145][ T128] check_heap_object (mm/usercopy.c:196)
[ 22.490904][ T128] __check_object_size (mm/usercopy.c:113 mm/usercopy.c:127 mm/usercopy.c:254 mm/usercopy.c:213)
[ 22.491681][ T128] copy_from_buffer (include/linux/uaccess.h:183 arch/x86/kernel/fpu/xstate.c:1202)
[ 22.492401][ T128] copy_uabi_to_xstate (arch/x86/kernel/fpu/xstate.c:1282 (discriminator 1))
[ 22.493151][ T128] copy_sigframe_from_user_to_xstate (arch/x86/kernel/fpu/xstate.c:1333)
[ 22.494036][ T128] __fpu_restore_sig (arch/x86/kernel/fpu/signal.c:396 (discriminator 1))
[ 22.494785][ T128] fpu__restore_sig (arch/x86/kernel/fpu/signal.c:497 (discriminator 1))
[ 22.495501][ T128] ia32_restore_sigcontext (arch/x86/kernel/signal_32.c:123)
[ 22.496318][ T128] __do_sys_sigreturn (arch/x86/kernel/signal_32.c:139 (discriminator 1))
[ 22.497061][ T128] ia32_sys_call (arch/x86/entry/syscall_32.c:42)
[ 22.497784][ T128] do_int80_syscall_32 (arch/x86/entry/common.c:165 (discriminator 1) arch/x86/entry/common.c:339 (discriminator 1))
[ 22.498530][ T128] ? __do_sys_vfork (kernel/fork.c:2903)
[ 22.499251][ T128] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4599)
[ 22.500172][ T128] ? switch_fpu_return (arch/x86/include/asm/trace/fpu.h:57 (discriminator 2) arch/x86/kernel/fpu/context.h:50 (discriminator 2) arch/x86/kernel/fpu/context.h:76 (discriminator 2) arch/x86/kernel/fpu/core.c:788 (discriminator 2))
[ 22.500903][ T128] ? syscall_exit_to_user_mode (kernel/entry/common.c:221)
[ 22.501733][ T128] ? do_int80_syscall_32 (arch/x86/entry/common.c:343)
[ 22.502481][ T128] ? irqentry_exit (kernel/entry/common.c:367)
[ 22.503186][ T128] ? do_fast_syscall_32 (arch/x86/entry/common.c:411 (discriminator 1))
[ 22.503932][ T128] entry_INT80_32 (arch/x86/entry/entry_32.S:944)
[ 22.504637][ T128] EIP: 0xb7fa4579
[ 22.505239][ T128] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
All code
========
0: b8 01 10 06 03 mov $0x3061001,%eax
5: 74 b4 je 0xffffffffffffffbb
7: 01 10 add %edx,(%rax)
9: 07 (bad)
a: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
e: 10 08 adc %cl,(%rax)
10: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
...
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
2a:* 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 ret
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 8d 76 00 lea 0x0(%rsi),%esi
35: 58 pop %rax
36: b8 77 00 00 00 mov $0x77,%eax
3b: cd 80 int $0x80
3d: 90 nop
3e: 8d .byte 0x8d
3f: 76 .byte 0x76
Code starting with the faulting instruction
===========================================
0: 5d pop %rbp
1: 5a pop %rdx
2: 59 pop %rcx
3: c3 ret
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 8d 76 00 lea 0x0(%rsi),%esi
b: 58 pop %rax
c: b8 77 00 00 00 mov $0x77,%eax
11: cd 80 int $0x80
13: 90 nop
14: 8d .byte 0x8d
15: 76 .byte 0x76
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240615/[email protected]
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki