* [jimc:dyndbg-maple-clean] [dyndbg] a07d369682: WARNING:at_lib/dynamic_debug.c:#ddebug_condense_sites
@ 2026-10-08 8:47 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-10-08 8:47 UTC (permalink / raw)
To: Jim Cromie, Łukasz Bartosik; +Cc: oe-lkp, lkp, yi1.lai
Hello,
kernel test robot noticed "WARNING:at_lib/dynamic_debug.c:#ddebug_condense_sites" on:
commit: a07d3696825a7aa1a5ce183115237bb12a36cb61 ("dyndbg: Save _ddebug_site fields into a maple-tree") https://github.com/jimc/linux.git dyndbg-maple-clean
in testcase: boot
config: i386-randconfig-1002-20260925
compiler: clang-22
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 4 -m 16G
(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 <yi1.lai@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202610081631.816e3e40-lkp@intel.com
[ 2.316457][ T1] ------------[ cut here ]------------
[ 2.321483][ T1] di->descs.len != di->sites.len
[ 2.321495][ T1] WARNING: lib/dynamic_debug.c:1746 at ddebug_condense_sites+0x518/0x540, CPU#0: swapper/0/1
[ 2.332767][ T1] Modules linked in:
[ 2.336097][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.3.0-rc1-00612-ga07d3696825a #1 PREEMPT
[ 2.342762][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 2.356101][ T1] EIP: ddebug_condense_sites+0x518/0x540
[ 2.361515][ T1] Code: 4e d5 44 ff 89 f2 8b 4d f0 83 c4 10 e9 97 fe ff ff 50 57 68 5c 07 74 43 68 78 ba 7d 43 e8 30 d5 44 ff 83 c4 10 e9 99 fe ff ff <0f> 0b e9 c5 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[ 2.369434][ T1] EAX: 5555785d EBX: 44f5dc4c ECX: 44f5dc4c EDX: 44f75c40
[ 2.376097][ T1] ESI: 437e97f1 EDI: 4414e918 EBP: 44f5dc08 ESP: 44f5dbe4
[ 2.382764][ T1] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010293
[ 2.389431][ T1] CR0: 80050033 CR2: ffd99000 CR3: 043e6000 CR4: 000406d0
[ 2.398112][ T1] Call Trace:
[ 2.401658][ T1] ? blocking_notifier_chain_register+0x34/0x80
[ 2.407856][ T1] ? dynamic_debug_init+0xae/0x2c0
[ 2.412440][ T1] ? local_clock+0x13/0x40
[ 2.416108][ T1] ? _raw_spin_unlock_irqrestore+0x2d/0x80
[ 2.421617][ T1] ? _raw_spin_unlock_irqrestore+0x2d/0x80
[ 2.427607][ T1] ? add_device_randomness+0x5c/0x80
[ 2.432771][ T1] ? trace_hardirqs_on+0x46/0xc0
[ 2.437426][ T1] ? do_one_initcall+0x183/0x440
[ 2.442438][ T1] ? dyndbg_setup+0x40/0x40
[ 2.446134][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.450724][ T1] ? local_clock+0x13/0x40
[ 2.454371][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.459432][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.464049][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.467954][ T1] ? __lock_acquire+0x594/0x2a00
[ 2.472788][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.477797][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.481233][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.487457][ T1] ? __lock_acquire+0x594/0x2a00
[ 2.491348][ T1] ? __alloc_empty_sheaf+0x43/0x80
[ 2.496106][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.501375][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.506102][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.511189][ T1] ? lock_acquire+0x9a/0x240
[ 2.514437][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.519438][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.524511][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.529451][ T1] ? local_clock+0x13/0x40
[ 2.532779][ T1] ? __register_sysctl_table+0x5c3/0x600
[ 2.537879][ T1] ? _raw_spin_unlock+0x1d/0x40
[ 2.542772][ T1] ? __register_sysctl_table+0x5c3/0x600
[ 2.548083][ T1] ? do_pre_smp_initcalls+0x33/0xc0
[ 2.552267][ T1] ? rest_init+0x180/0x180
[ 2.556101][ T1] ? kernel_init_freeable+0x5b/0x100
[ 2.560764][ T1] ? rest_init+0x180/0x180
[ 2.564364][ T1] ? kernel_init+0x1c/0x140
[ 2.569434][ T1] ? ret_from_fork+0x11e/0x240
[ 2.572772][ T1] ? rest_init+0x180/0x180
[ 2.577059][ T1] ? ret_from_fork_asm+0x12/0x20
[ 2.581179][ T1] ? entry_INT80_32+0xef/0xef
[ 2.586130][ T1] irq event stamp: 1549
[ 2.589427][ T1] hardirqs last enabled at (1567): [<4113f85c>] __console_unlock+0x5c/0x80
[ 2.596098][ T1] hardirqs last disabled at (1586): [<4113f843>] __console_unlock+0x43/0x80
[ 2.606097][ T1] softirqs last enabled at (262): [<42907d0f>] __do_softirq+0xf/0x11
[ 2.612768][ T1] softirqs last disabled at (257): [<42907d0f>] __do_softirq+0xf/0x11
[ 2.619431][ T1] ---[ end trace 0000000000000000 ]---
[ 2.626105][ T1] BUG: kernel NULL pointer dereference, address: 00000000
[ 2.629400][ T1] #PF: supervisor read access in kernel mode
[ 2.629400][ T1] #PF: error_code(0x0000) - not-present page
[ 2.629400][ T1] *pde = 00000000
[ 2.629400][ T1] Oops: Oops: 0000 [#1]
[ 2.629400][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W 7.3.0-rc1-00612-ga07d3696825a #1 PREEMPT
[ 2.629400][ T1] Tainted: [W]=WARN
[ 2.629400][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 2.629400][ T1] EIP: strcmp+0xe/0x40
[ 2.629400][ T1] Code: 06 ac aa 84 c0 75 f7 31 c0 aa 89 d8 83 c4 04 5e 5f 5b 5d c3 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c6 89 d7 <ac> ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 5e 5f 5d c3 90 90
[ 2.629400][ T1] EAX: 00000000 EBX: 0000000c ECX: 5555785c EDX: 437e97f1
[ 2.629400][ T1] ESI: 00000000 EDI: 437e97f1 EBP: 44f5dc08 ESP: 44f5dc00
[ 2.629400][ T1] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010297
[ 2.629400][ T1] CR0: 80050033 CR2: 00000000 CR3: 043e6000 CR4: 000406d0
[ 2.629400][ T1] Call Trace:
[ 2.629400][ T1] ? dynamic_debug_init+0xe0/0x2c0
[ 2.629400][ T1] ? _raw_spin_unlock_irqrestore+0x2d/0x80
[ 2.629400][ T1] ? add_device_randomness+0x5c/0x80
[ 2.629400][ T1] ? trace_hardirqs_on+0x46/0xc0
[ 2.629400][ T1] ? do_one_initcall+0x183/0x440
[ 2.629400][ T1] ? dyndbg_setup+0x40/0x40
[ 2.629400][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.629400][ T1] ? local_clock+0x13/0x40
[ 2.629400][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.629400][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.629400][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.629400][ T1] ? __lock_acquire+0x594/0x2a00
[ 2.629400][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.629400][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.629400][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.629400][ T1] ? __lock_acquire+0x594/0x2a00
[ 2.629400][ T1] ? __alloc_empty_sheaf+0x43/0x80
[ 2.629400][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.629400][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.629400][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.629400][ T1] ? lock_acquire+0x9a/0x240
[ 2.629400][ T1] ? kvm_sched_clock_read+0xd/0x40
[ 2.629400][ T1] ? sched_clock_noinstr+0x8/0x10
[ 2.629400][ T1] ? local_clock_noinstr+0x36/0x140
[ 2.629400][ T1] ? local_clock+0x13/0x40
[ 2.629400][ T1] ? __register_sysctl_table+0x5c3/0x600
[ 2.629400][ T1] ? _raw_spin_unlock+0x1d/0x40
[ 2.629400][ T1] ? __register_sysctl_table+0x5c3/0x600
[ 2.629400][ T1] ? do_pre_smp_initcalls+0x33/0xc0
[ 2.629400][ T1] ? rest_init+0x180/0x180
[ 2.629400][ T1] ? kernel_init_freeable+0x5b/0x100
[ 2.629400][ T1] ? rest_init+0x180/0x180
[ 2.629400][ T1] ? kernel_init+0x1c/0x140
[ 2.629400][ T1] ? ret_from_fork+0x11e/0x240
[ 2.629400][ T1] ? rest_init+0x180/0x180
[ 2.629400][ T1] ? ret_from_fork_asm+0x12/0x20
[ 2.629400][ T1] ? entry_INT80_32+0xef/0xef
[ 2.629400][ T1] Modules linked in:
[ 2.629400][ T1] CR2: 0000000000000000
[ 2.629400][ T1] ---[ end trace 0000000000000000 ]---
[ 2.629400][ T1] EIP: strcmp+0xe/0x40
[ 2.629400][ T1] Code: 06 ac aa 84 c0 75 f7 31 c0 aa 89 d8 83 c4 04 5e 5f 5b 5d c3 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c6 89 d7 <ac> ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 5e 5f 5d c3 90 90
[ 2.629400][ T1] EAX: 00000000 EBX: 0000000c ECX: 5555785c EDX: 437e97f1
[ 2.629400][ T1] ESI: 00000000 EDI: 437e97f1 EBP: 44f5dc08 ESP: 44f5dc00
[ 2.629400][ T1] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010297
[ 2.629400][ T1] CR0: 80050033 CR2: 00000000 CR3: 043e6000 CR4: 000406d0
[ 2.629400][ T1] Kernel panic - not syncing: Fatal exception
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261008/202610081631.816e3e40-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-10-08 8:47 [jimc:dyndbg-maple-clean] [dyndbg] a07d369682: WARNING:at_lib/dynamic_debug.c:#ddebug_condense_sites kernel test robot
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