Hello,
kernel test robot noticed "UBSAN:shift-out-of-bounds_in_mm/slub.c" on:
commit: f04d441027621c16081803832a54f59272112cf5 ("[PATCH 4/4] mm/slub: refactor calculate_order() and calc_slab_order()")
url: https://github.com/intel-lab-lkp/linux/commits/Vlastimil-Babka/mm-slub-simplify-the-last-resort-slab-order-calculation/20230908-225506
base: git://git.kernel.org/cgit/linux/kernel/git/vbabka/slab.git for-next
patch link: https://lore.kernel.org/all/20230908145302.30320-10-vbabka@xxxxxxx/
patch subject: [PATCH 4/4] mm/slub: refactor calculate_order() and calc_slab_order()
in testcase: boot
compiler: clang-16
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-------------------------------------------------+------------+------------+
| | a17847b835 | f04d441027 |
+-------------------------------------------------+------------+------------+
| UBSAN:shift-out-of-bounds_in_mm/slub.c | 0 | 12 |
+-------------------------------------------------+------------+------------+
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/202309111340.f59c3f22-oliver.sang@xxxxxxxxx
[ 0.901457][ T0] UBSAN: shift-out-of-bounds in mm/slub.c:463:34
[ 0.902458][ T0] shift exponent 52 is too large for 32-bit type 'unsigned int'
[ 0.903477][ T0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G T 6.5.0-rc1-00009-gf04d44102762 #1
[ 0.904450][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 0.904450][ T0] Call Trace:
[ 0.904450][ T0] <TASK>
[ 0.904450][ T0] dump_stack_lvl (lib/dump_stack.c:107)
[ 0.904450][ T0] dump_stack (lib/dump_stack.c:114)
[ 0.904450][ T0] ubsan_epilogue (lib/ubsan.c:218)
[ 0.904450][ T0] __ubsan_handle_shift_out_of_bounds (lib/ubsan.c:?)
[ 0.904450][ T0] ? tdx_handle_virt_exception (arch/x86/include/asm/shared/tdx.h:60 arch/x86/coco/tdx/tdx.c:375 arch/x86/coco/tdx/tdx.c:430 arch/x86/coco/tdx/tdx.c:650 arch/x86/coco/tdx/tdx.c:666)
[ 0.904450][ T0] ? kmemleak_alloc (mm/kmemleak.c:977)
[ 0.904450][ T0] __kmem_cache_create (mm/slub.c:? mm/slub.c:4159 mm/slub.c:4473 mm/slub.c:4507 mm/slub.c:5104)
[ 0.904450][ T0] ? kmem_cache_alloc (mm/slub.c:3502)
[ 0.904450][ T0] kmem_cache_create_usercopy (mm/slab_common.c:236 mm/slab_common.c:340)
[ 0.904450][ T0] fork_init (kernel/fork.c:1048)
[ 0.904450][ T0] ? kmem_cache_create (mm/slab_common.c:395)
[ 0.904450][ T0] start_kernel (init/main.c:1046)
[ 0.904450][ T0] x86_64_start_reservations (??:?)
[ 0.904450][ T0] x86_64_start_kernel (arch/x86/kernel/head64.c:486)
[ 0.904450][ T0] secondary_startup_64_no_verify (arch/x86/kernel/head_64.S:441)
[ 0.904450][ T0] </TASK>
[ 0.904457][ T0] ================================================================================
[ 0.905560][ T0] LSM: initializing lsm=lockdown,capability,landlock,yama,safesetid,integrity
[ 0.906497][ T0] landlock: Up and running.
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230911/202309111340.f59c3f22-oliver.sang@xxxxxxxxx
--
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https://github.com/intel/lkp-tests/wiki
