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charset="utf-8" Hello, we don't have enough knowledge to dig deep the relation between the random issues and the change. we tried to rebuild kernel. still see the same config diff: --- /pkg/linux/i386-randconfig-013-20250413/gcc-12/d2cf8ccf5a1871058a083c00= efe37d7eb91bf6bd/.config 2025-04-22 15:01:12.846009313 +0800 +++ /pkg/linux/i386-randconfig-013-20250413/gcc-12/ed2b548f1017586c44f50654= ef9febb42d491f31/.config 2025-04-22 15:00:23.620141366 +0800 @@ -5558,7 +5558,6 @@ CONFIG_UBSAN_BOUNDS_STRICT=3Dy CONFIG_UBSAN_SHIFT=3Dy # CONFIG_UBSAN_DIV_ZERO is not set CONFIG_UBSAN_UNREACHABLE=3Dy -CONFIG_UBSAN_SIGNED_WRAP=3Dy # CONFIG_UBSAN_BOOL is not set # CONFIG_UBSAN_ENUM is not set # CONFIG_UBSAN_ALIGNMENT is not set we tried run both parent and this commit until almost 1000 times, the parent still keep clean on running same test, this commit shows various issues =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D tbox_group/testcase/rootfs/kconfig/compiler/runtime/scale_type: vm-snb-i386/rcuscale/debian-11.1-i386-20220923.cgz/i386-randconfig-013-20= 250413/gcc-12/300s/srcu d2cf8ccf5a187105 ed2b548f1017586c44f50654ef9 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :999 27% 269:998 last_state.booting :999 27% 269:998 last_state.is_incomplete_run :999 18% 177:998 dmesg.BUG:kernel_hang_in_boot= _stage :999 2% 16:998 dmesg.BUG:workqueue_lockup-po= ol :999 18% 176:998 dmesg.INFO:task_blocked_for_m= ore_than#seconds :999 8% 76:998 dmesg.IP-Config:Auto-configur= ation_of_network_failed :999 27% 269:998 dmesg.boot_failures so we still make out this report FYI what we observed in our tests. kernel test robot noticed "INFO:task_blocked_for_more_than#seconds" on: commit: ed2b548f1017586c44f50654ef9febb42d491f31 ("ubsan/overflow: Rework i= nteger overflow sanitizer option to turn on everything") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master c1336865c4c90fcc649df0435a7c86c30030a723] [test failed on linux-next/master f660850bc246fef15ba78c81f686860324396628] in testcase: rcuscale version:=20 with following parameters: runtime: 300s scale_type: srcu config: i386-randconfig-013-20250413 compiler: gcc-12 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (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 versio= n of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202504231437.d0a0174e-lkp@intel.com [ 985.037272][ T22] INFO: task swapper:1 blocked for more than 491 secon= ds. [ 985.037272][ T22] Tainted: G T 6.14.0-rc2-00021-= ged2b548f1017 #1 [ 985.114644][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" d= isables this message. [ 985.131238][ T22] task:swapper state:D stack:0 pid:1 t= gid:1 ppid:0 task_flags:0x4000040 flags:0x00004000 [ 985.184178][ T22] Call Trace: [ 985.184178][ T22] __schedule (kernel/sched/core.c:5380 kernel/sched/core.= c:6764)=20 [ 985.239369][ T22] schedule (kernel/sched/core.c:6842 kernel/sched/core.c:= 6856)=20 [ 985.292955][ T22] async_synchronize_cookie_domain (kernel/async.c:317 ker= nel/async.c:310)=20 [ 985.292955][ T22] ? swake_up_all (kernel/sched/wait.c:383)=20 [ 985.347537][ T22] wait_for_initramfs (init/initramfs.c:767)=20 [ 985.347537][ T22] populate_rootfs (init/initramfs.c:777)=20 [ 985.402751][ T22] ? do_copy (init/initramfs.c:771)=20 [ 985.402751][ T22] do_one_initcall (init/main.c:1257)=20 [ 985.483184][ T22] ? parse_args (kernel/params.c:188)=20 [ 985.536816][ T22] do_initcalls (init/main.c:1318 init/main.c:1335)=20 [ 985.599031][ T22] kernel_init_freeable (init/main.c:1570)=20 [ 985.599031][ T22] ? rest_init (init/main.c:1449)=20 [ 985.625998][ T22] kernel_init (init/main.c:1459)=20 [ 985.625998][ T22] ret_from_fork (arch/x86/kernel/process.c:154)=20 [ 985.680001][ T22] ? rest_init (init/main.c:1449)=20 [ 985.680001][ T22] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)=20 [ 985.733799][ T22] entry_INT80_32 (arch/x86/entry/entry_32.S:942)=20 [ 985.842056][ T22] [ 985.842056][ T22] Showing all locks held in the system: [ 985.842056][ T22] 4 locks held by kworker/u4:1/19: [ 985.895824][ T22] 1 lock held by khungtaskd/22: [ 985.895824][ T22] #0: c88799b0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_= acquire (include/linux/rcupdate.h:336)=20 [ 985.949551][ T22] [ 985.949551][ T22] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D [ 985.949551][ T22] BUG: kernel hang in boot stage The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250423/202504231437.d0a0174e-lkp@= intel.com --=20 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki