Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 70189f1d40b1a9dd7d5c1deabcfa6f135633506e ("[PATCH net-next] skbuff: inline page_frag_alloc_align()") url: https://github.com/0day-ci/linux/commits/Yajun-Deng/skbuff-inline-page_frag_alloc_align/20210903-105023 base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git 29ce8f9701072fc221d9c38ad952de1a9578f95c in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +--------------------------------------------+------------+------------+ | | 29ce8f9701 | 70189f1d40 | +--------------------------------------------+------------+------------+ | boot_successes | 18 | 0 | | boot_failures | 0 | 21 | | BUG:using_smp_processor_id()in_preemptible | 0 | 21 | +--------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 25.854525][ T1] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1 [ 25.857967][ T1] caller is __netdev_alloc_frag_align+0x5e/0xc0 [ 25.860289][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.14.0-rc7-01982-g70189f1d40b1 #1 [ 25.863303][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.866158][ T1] Call Trace: [ 25.867383][ T1] dump_stack_lvl+0x45/0x59 [ 25.868894][ T1] check_preemption_disabled+0xd9/0x100 [ 25.870736][ T1] __netdev_alloc_frag_align+0x5e/0xc0 [ 25.872675][ T1] e1000_alloc_frag+0x21/0x40 [ 25.874361][ T1] e1000_alloc_rx_buffers+0x89/0x380 [ 25.876187][ T1] e1000_configure+0x2bd/0x300 [ 25.877721][ T1] e1000_open+0x8b/0x1c0 [ 25.879208][ T1] __dev_open+0xea/0x180 [ 25.880669][ T1] __dev_change_flags+0x19e/0x200 [ 25.882375][ T1] ? _get_random_bytes+0xf1/0x240 [ 25.884179][ T1] dev_change_flags+0x21/0x80 [ 25.885746][ T1] ip_auto_config+0x2b4/0xb9a [ 25.887337][ T1] ? lock_is_held_type+0xd5/0x140 [ 25.889052][ T1] ? root_nfs_parse_addr+0xa5/0xa5 [ 25.890776][ T1] ? do_one_initcall+0x5b/0x340 [ 25.892409][ T1] do_one_initcall+0x5b/0x340 [ 25.893940][ T1] ? rcu_read_lock_sched_held+0x52/0x80 [ 25.895658][ T1] kernel_init_freeable+0x28b/0x2f2 [ 25.897430][ T1] ? rest_init+0x280/0x280 [ 25.898921][ T1] kernel_init+0x16/0x140 [ 25.900448][ T1] ret_from_fork+0x22/0x30 [ 25.902593][ T1] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1 [ 25.914323][ T1] caller is __netdev_alloc_frag_align+0x5e/0xc0 [ 25.916499][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.14.0-rc7-01982-g70189f1d40b1 #1 [ 25.919474][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.922510][ T1] Call Trace: [ 25.923706][ T1] dump_stack_lvl+0x45/0x59 [ 25.925728][ T1] check_preemption_disabled+0xd9/0x100 [ 25.928390][ T1] __netdev_alloc_frag_align+0x5e/0xc0 [ 25.930429][ T1] e1000_alloc_frag+0x21/0x40 [ 25.931940][ T1] e1000_alloc_rx_buffers+0x89/0x380 [ 25.933677][ T1] e1000_configure+0x2bd/0x300 [ 25.935404][ T1] e1000_open+0x8b/0x1c0 [ 25.936909][ T1] __dev_open+0xea/0x180 [ 25.938607][ T1] __dev_change_flags+0x19e/0x200 [ 25.940287][ T1] ? _get_random_bytes+0xf1/0x240 [ 25.941900][ T1] dev_change_flags+0x21/0x80 [ 25.943560][ T1] ip_auto_config+0x2b4/0xb9a [ 25.945110][ T1] ? lock_is_held_type+0xd5/0x140 [ 25.946921][ T1] ? root_nfs_parse_addr+0xa5/0xa5 [ 25.948601][ T1] ? do_one_initcall+0x5b/0x340 [ 25.950342][ T1] do_one_initcall+0x5b/0x340 [ 25.951799][ T1] ? rcu_read_lock_sched_held+0x52/0x80 [ 25.953494][ T1] kernel_init_freeable+0x28b/0x2f2 [ 25.955277][ T1] ? rest_init+0x280/0x280 [ 25.956772][ T1] kernel_init+0x16/0x140 [ 25.958279][ T1] ret_from_fork+0x22/0x30 To reproduce: # build kernel cd linux cp config-5.14.0-rc7-01982-g70189f1d40b1 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k job-script # job-script is attached in this email --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang