From: kernel test robot <oliver.sang@intel.com>
To: Harry Yoo <harry.yoo@oracle.com>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
Vlastimil Babka <vbabka@suse.cz>, <linux-mm@kvack.org>,
<oliver.sang@intel.com>
Subject: [linux-next:master] [mm/slab] 4fad56bdb6: BUG_kmalloc-#:Padding_overwritten.#-#@offset=
Date: Fri, 23 Jan 2026 15:21:19 +0800 [thread overview]
Message-ID: <202601231457.f7b31e09-lkp@intel.com> (raw)
Hello,
kernel test robot noticed "BUG_kmalloc-#:Padding_overwritten.#-#@offset=" on:
commit: 4fad56bdb6b4c4bc0ea2d919df1ae4eef7b69919 ("mm/slab: save memory by allocating slabobj_ext array from leftover")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master e3b32dcb9f23e3c3927ef3eec6a5842a988fb574]
in testcase: boot
config: x86_64-randconfig-012-20260121
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/202601231457.f7b31e09-lkp@intel.com
[ 3.646661][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 3.647660][ T0] **********************************************************
[ 3.648834][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 3.651537][ T0] Kernel/User page tables isolation: enabled
[ 3.653242][ T0] =============================================================================
[ 3.655191][ T0] BUG kmalloc-192 (Tainted: G T ): Padding overwritten. 0xffff88810006c028-0xffff88810006bfff @offset=8232
[ 3.657925][ T0] -----------------------------------------------------------------------------
[ 3.657925][ T0]
[ 3.660319][ T0] Padding ffff88810006c028: 00 00 00 00 00 00 00 00 30 c0 06 00 81 88 ff ff ........0.......
[ 3.662476][ T0] Padding ffff88810006c038: 30 c0 06 00 81 88 ff ff 00 00 00 00 00 00 00 00 0...............
[ 3.664649][ T0] Padding ffff88810006c048: 48 c0 06 00 81 88 ff ff 48 c0 06 00 81 88 ff ff H.......H.......
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260123/202601231457.f7b31e09-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-01-23 7:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-23 7:21 kernel test robot [this message]
2026-01-24 11:12 ` [linux-next:master] [mm/slab] 4fad56bdb6: BUG_kmalloc-#:Padding_overwritten.#-#@offset= Harry Yoo
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