Hello,
kernel test robot noticed "kernel_BUG_at_arch/x86/mm/physaddr.c" on:
commit: dfb3911c3692e45b027f13c7dca3230921533953 ("x86/kaslr: Expose and use the end of the physical memory address space")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git x86/urgent
[test failed on linux-next/master 469f1bad3c1c6e268059f78c0eec7e9552b3894c]
in testcase: boot
compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+--------------------------------------+------------+------------+
| | 2848ff28d1 | dfb3911c36 |
+--------------------------------------+------------+------------+
| boot_successes | 21 | 0 |
| boot_failures | 0 | 21 |
| kernel_BUG_at_arch/x86/mm/physaddr.c | 0 | 21 |
| PANIC:early_exception | 0 | 21 |
| RIP:__phys_addr | 0 | 21 |
+--------------------------------------+------------+------------+
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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202408201529.498d4d4d-lkp@xxxxxxxxx
[ 0.010309][ T0] ------------[ cut here ]------------
[ 0.011020][ T0] kernel BUG at arch/x86/mm/physaddr.c:28!
PANIC: early exception 0x06 IP 10:ffffffffb08e3511 error 0 cr2 0xffff888038627ff8
[ 0.012655][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.11.0-rc3-00003-gdfb3911c3692 #1
[ 0.013805][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 0.015203][ T0] RIP: 0010:__phys_addr (ld-temp.o:?)
[ 0.015856][ T0] Code: c3 48 3d 00 00 00 40 73 23 48 03 05 19 8b d4 02 48 89 c3 eb dd 48 c7 c7 d0 02 81 b3 48 89 de 4c 89 f2 e8 c2 26 45 00 eb bb 90 <0f> 0b 90 0f 0b cc cc cc cc cc cc cc cc cc cc 48 8b 05 59 a2 64 03
All code
========
0: c3 ret
1: 48 3d 00 00 00 40 cmp $0x40000000,%rax
7: 73 23 jae 0x2c
9: 48 03 05 19 8b d4 02 add 0x2d48b19(%rip),%rax # 0x2d48b29
10: 48 89 c3 mov %rax,%rbx
13: eb dd jmp 0xfffffffffffffff2
15: 48 c7 c7 d0 02 81 b3 mov $0xffffffffb38102d0,%rdi
1c: 48 89 de mov %rbx,%rsi
1f: 4c 89 f2 mov %r14,%rdx
22: e8 c2 26 45 00 call 0x4526e9
27: eb bb jmp 0xffffffffffffffe4
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: 0f 0b ud2
2f: cc int3
30: cc int3
31: cc int3
32: cc int3
33: cc int3
34: cc int3
35: cc int3
36: cc int3
37: cc int3
38: cc int3
39: 48 8b 05 59 a2 64 03 mov 0x364a259(%rip),%rax # 0x364a299
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: 0f 0b ud2
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: cc int3
c: cc int3
d: cc int3
e: cc int3
f: 48 8b 05 59 a2 64 03 mov 0x364a259(%rip),%rax # 0x364a26f
[ 0.018297][ T0] RSP: 0000:ffffffffb3603e80 EFLAGS: 00010002 ORIG_RAX: 0000000000000000
[ 0.019380][ T0] RAX: 0000000000000001 RBX: 0000010040000000 RCX: 0000000000000028
[ 0.020378][ T0] RDX: 000017562bdbd039 RSI: 0000000000000000 RDI: ffffa0d640000000
[ 0.021374][ T0] RBP: ffffffffb4808710 R08: 0000000000000000 R09: 0000000000000000
[ 0.022382][ T0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffb3603ea8
[ 0.023182][ T0] R13: 0000175600000000 R14: 0000000000000028 R15: 0000000000000000
[ 0.023800][ T0] FS: 0000000000000000(0000) GS:ffffffffb362f000(0000) knlGS:0000000000000000
[ 0.024489][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.024995][ T0] CR2: ffff888038627ff8 CR3: 00000000397c0000 CR4: 00000000000000b0
[ 0.025613][ T0] Call Trace:
[ 0.025863][ T0] <TASK>
[ 0.026089][ T0] ? early_fixup_exception (ld-temp.o:?)
[ 0.026502][ T0] ? early_idt_handler_common (arch/x86/kernel/head_64.S:542)
[ 0.026951][ T0] ? __phys_addr (ld-temp.o:?)
[ 0.027298][ T0] ? kernel_randomize_memory (ld-temp.o:?)
[ 0.027735][ T0] ? setup_arch (ld-temp.o:?)
[ 0.028082][ T0] ? start_kernel (init/main.c:927)
[ 0.028433][ T0] ? x86_64_start_reservations (ld-temp.o:?)
[ 0.028866][ T0] ? x86_64_start_kernel (ld-temp.o:?)
[ 0.029268][ T0] ? common_startup_64 (arch/x86/kernel/head_64.S:421)
[ 0.029658][ T0] </TASK>
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240820/202408201529.498d4d4d-lkp@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
