From: kernel test robot <oliver.sang@intel.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
Mike Rapoport <rppt@kernel.org>, <oliver.sang@intel.com>
Subject: [rppt:hugetlb-init/v0] [dev] ac8d6455e4: PANIC:early_exception
Date: Mon, 29 Dec 2025 13:37:15 +0800 [thread overview]
Message-ID: <202512291353.1423cde2-lkp@intel.com> (raw)
Hello,
kernel test robot noticed "PANIC:early_exception" on:
commit: ac8d6455e4bbac839994bac1863b9017acb90c88 ("dev: Revert "mm/hugetlb: deal with multiple calls to hugetlb_bootmem_alloc"")
https://git.kernel.org/cgit/linux/kernel/git/rppt/linux.git hugetlb-init/v0
in testcase: boot
config: x86_64-randconfig-014-20251225
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G
(please refer to attached dmesg/kmsg for entire log/backtrace)
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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202512291353.1423cde2-lkp@intel.com
[ 1.747357][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 1.748440][ T0] PM: hibernation: Registered nosave memory: [mem 0xbffe0000-0xffffffff]
[ 1.749535][ T0] [mem 0xc0000000-0xfeffbfff] available for PCI devices
[ 1.750441][ T0] Booting paravirtualized kernel on KVM
[ 1.751160][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6370452778343963 ns
PANIC: early exception 0x0c IP 10:ffffffff85c3e5eb error 0 cr2 0xffff88883ffff000
[ 1.773701][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.19.0-rc1-00027-gac8d6455e4bb #1 PREEMPT(undef)
[ 1.775093][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 1.776471][ T0] RIP: 0010:hugetlb_vmemmap_init_early (kbuild/src/consumer/mm/hugetlb_vmemmap.c:758)
[ 1.777364][ T0] Code: 3f 83 fb 41 0f 83 c2 02 00 00 4c 3b 7c 24 20 0f 84 b7 03 00 00 8a 05 04 5a 20 ff 3c 01 75 c0 4d 8d 67 10 4c 89 e5 48 c1 ed 03 <80> 7c 15 00 00 74 12 4c 89 e7 e8 e6 24 d5 fb 48 ba 00 00 00 00 00
All code
========
0: 3f (bad)
1: 83 fb 41 cmp $0x41,%ebx
4: 0f 83 c2 02 00 00 jae 0x2cc
a: 4c 3b 7c 24 20 cmp 0x20(%rsp),%r15
f: 0f 84 b7 03 00 00 je 0x3cc
15: 8a 05 04 5a 20 ff mov -0xdfa5fc(%rip),%al # 0xffffffffff205a1f
1b: 3c 01 cmp $0x1,%al
1d: 75 c0 jne 0xffffffffffffffdf
1f: 4d 8d 67 10 lea 0x10(%r15),%r12
23: 4c 89 e5 mov %r12,%rbp
26: 48 c1 ed 03 shr $0x3,%rbp
2a:* 80 7c 15 00 00 cmpb $0x0,0x0(%rbp,%rdx,1) <-- trapping instruction
2f: 74 12 je 0x43
31: 4c 89 e7 mov %r12,%rdi
34: e8 e6 24 d5 fb call 0xfffffffffbd5251f
39: 48 rex.W
3a: ba 00 00 00 00 mov $0x0,%edx
...
Code starting with the faulting instruction
===========================================
0: 80 7c 15 00 00 cmpb $0x0,0x0(%rbp,%rdx,1)
5: 74 12 je 0x19
7: 4c 89 e7 mov %r12,%rdi
a: e8 e6 24 d5 fb call 0xfffffffffbd524f5
f: 48 rex.W
10: ba 00 00 00 00 mov $0x0,%edx
...
[ 1.779986][ T0] RSP: 0000:ffffffff84807cf0 EFLAGS: 00010002 ORIG_RAX: 0000000000000000
[ 1.781096][ T0] RAX: 1ffffffff0ba2b01 RBX: 0000000000000000 RCX: 0000000000000000
[ 1.782156][ T0] RDX: dffffc0000000000 RSI: ffffffff869f7738 RDI: 0000000000000000
[ 1.783242][ T0] RBP: 0000000000000002 R08: 0000000000000020 R09: 000000000001fb80
[ 1.784333][ T0] R10: 000000083ffe0480 R11: ffffffff00000020 R12: 0000000000000010
[ 1.785292][ T0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1.786174][ T0] FS: 0000000000000000(0000) GS:0000000000000000(0000) knlGS:0000000000000000
[ 1.787169][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.787906][ T0] CR2: ffff88883ffff000 CR3: 0000000004867000 CR4: 00000000000000b0
[ 1.788857][ T0] Call Trace:
[ 1.789309][ T0] <TASK>
[ 1.789719][ T0] sparse_init_nid (kbuild/src/consumer/include/linux/mmzone.h:2260 (discriminator 1) kbuild/src/consumer/mm/sparse.c:549 (discriminator 1))
[ 1.790364][ T0] sparse_init (kbuild/src/consumer/mm/sparse.c:624)
[ 1.790957][ T0] zone_limits_init (kbuild/src/consumer/mm/mm_init.c:1819)
[ 1.791606][ T0] ? find_held_lock (kbuild/src/consumer/kernel/locking/lockdep.c:5350)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251229/202512291353.1423cde2-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2025-12-29 5:37 UTC|newest]
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