* [jirislaby:devel] [serial] 2dd9c2acfb: WARNING:held_lock_freed
@ 2025-12-17 14:15 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-12-17 14:15 UTC (permalink / raw)
To: Jiri Slaby; +Cc: oe-lkp, lkp, oliver.sang
Hello,
kernel test robot noticed "WARNING:held_lock_freed" on:
commit: 2dd9c2acfb03ee7a076cbd16ae9d3ee6f29bcd70 ("serial: drv->state -> xarray")
https://git.kernel.org/cgit/linux/kernel/git/jirislaby/linux.git devel
in testcase: boot
config: i386-randconfig-141-20251214
compiler: clang-20
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+---------------------------------------------------+------------+------------+
| | bd332738e0 | 2dd9c2acfb |
+---------------------------------------------------+------------+------------+
| WARNING:held_lock_freed | 0 | 12 |
| is_freeing_memory#-#,with_a_lock_still_held_there | 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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202512172240.63ac762f-lkp@intel.com
[ 1.149928][ T1] WARNING: held lock freed!
[ 1.150447][ T1] 6.18.0-next-20251209-00027-g2dd9c2acfb03 #1 Not tainted
[ 1.150960][ T1] -------------------------
[ 1.150960][ T1] swapper/0/1 is freeing memory 43dba800-43dbabff, with a lock still held there!
[ 1.150960][ T1] 43dba9ac (&port->mutex){+.+.}-{4:4}, at: serial_core_unregister_port (arch/x86/include/asm/atomic.h:85 include/linux/atomic/atomic-arch-fallback.h:787 include/linux/atomic/atomic-arch-fallback.h:1238 include/linux/atomic/atomic-instrumented.h:611 drivers/tty/serial/serial_core.c:3151 drivers/tty/serial/serial_core.c:3312)
[ 1.150960][ T1] 4 locks held by swapper/0/1:
[ 1.150960][ T1] #0: 427e8b40 (&dev->mutex){....}-{4:4}, at: __device_attach (drivers/base/dd.c:1007)
[ 1.150960][ T1] #1: 427e8240 (serial_mutex){+.+.}-{4:4}, at: serial8250_register_8250_port (drivers/tty/serial/8250/8250_core.c:637 drivers/tty/serial/8250/8250_core.c:700)
[ 1.150960][ T1] #2: 427e7930 (port_mutex){+.+.}-{4:4}, at: serial_core_unregister_port (drivers/tty/serial/serial_core.c:3310)
[ 1.150960][ T1] #3: 43dba9ac (&port->mutex){+.+.}-{4:4}, at: serial_core_unregister_port (arch/x86/include/asm/atomic.h:85 include/linux/atomic/atomic-arch-fallback.h:787 include/linux/atomic/atomic-arch-fallback.h:1238 include/linux/atomic/atomic-instrumented.h:611 drivers/tty/serial/serial_core.c:3151 drivers/tty/serial/serial_core.c:3312)
[ 1.150960][ T1]
[ 1.150960][ T1] stack backtrace:
[ 1.150960][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.0-next-20251209-00027-g2dd9c2acfb03 #1 PREEMPT(none)
[ 1.150960][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 1.150960][ T1] Call Trace:
[ 1.150960][ T1] ? __dump_stack (lib/dump_stack.c:95)
[ 1.150960][ T1] ? dump_stack_lvl (lib/dump_stack.c:123)
[ 1.150960][ T1] ? vprintk (kernel/printk/printk_safe.c:82)
[ 1.150960][ T1] ? dump_stack (lib/dump_stack.c:129)
[ 1.150960][ T1] ? debug_check_no_locks_freed (kernel/locking/lockdep.c:6695 kernel/locking/lockdep.c:6728)
[ 1.150960][ T1] ? serial_core_unregister_port (include/linux/mutex.h:253 drivers/tty/serial/serial_core.c:3114 drivers/tty/serial/serial_core.c:3312)
[ 1.150960][ T1] ? kfree (mm/slub.c:6671 mm/slub.c:6876)
[ 1.150960][ T1] ? serial_core_unregister_port (include/linux/mutex.h:253 drivers/tty/serial/serial_core.c:3114 drivers/tty/serial/serial_core.c:3312)
[ 1.150960][ T1] ? serial_ctrl_unregister_port (drivers/tty/serial/serial_ctrl.c:47)
[ 1.150960][ T1] ? uart_remove_one_port (drivers/tty/serial/serial_port.c:150)
[ 1.150960][ T1] ? serial8250_register_8250_port (drivers/tty/serial/8250/8250_core.c:719)
[ 1.150960][ T1] ? serial8250_probe (include/linux/err.h:78 drivers/tty/serial/8250/8250_platform.c:196 drivers/tty/serial/8250/8250_platform.c:218)
[ 1.150960][ T1] ? platform_probe (drivers/base/platform.c:?)
[ 1.150960][ T1] ? really_probe (drivers/base/dd.c:583 drivers/base/dd.c:659)
[ 1.150960][ T1] ? __driver_probe_device (drivers/base/dd.c:801)
[ 1.150960][ T1] ? driver_probe_device (drivers/base/dd.c:831)
[ 1.150960][ T1] ? platform_match (drivers/base/platform.c:?)
[ 1.150960][ T1] ? __device_attach_driver (drivers/base/dd.c:960)
[ 1.150960][ T1] ? bus_for_each_drv (drivers/base/bus.c:500)
[ 1.150960][ T1] ? __pm_runtime_resume (drivers/base/power/runtime.c:1200)
[ 1.150960][ T1] ? __device_attach (drivers/base/dd.c:1031)
[ 1.150960][ T1] ? deferred_devs_show (drivers/base/dd.c:923)
[ 1.150960][ T1] ? device_initial_probe (drivers/base/dd.c:?)
[ 1.150960][ T1] ? bus_probe_device (drivers/base/bus.c:576)
[ 1.150960][ T1] ? device_add (drivers/base/core.c:3696)
[ 1.150960][ T1] ? dev_set_name (drivers/base/core.c:3494)
[ 1.150960][ T1] ? platform_device_add (drivers/base/platform.c:757)
[ 1.150960][ T1] ? platform_device_register (drivers/base/platform.c:820)
[ 1.150960][ T1] ? exar_init (drivers/tty/serial/8250/8250_exar_st16c554.c:33)
[ 1.150960][ T1] ? do_one_initcall (init/main.c:1378)
[ 1.150960][ T1] ? kvm_sched_clock_read (arch/x86/kernel/kvmclock.c:91)
[ 1.150960][ T1] ? sched_clock_noinstr (arch/x86/kernel/tsc.c:272)
[ 1.150960][ T1] ? local_clock_noinstr (kernel/sched/clock.c:272 kernel/sched/clock.c:309)
[ 1.150960][ T1] ? __lock_acquire (kernel/locking/lockdep.c:4674 kernel/locking/lockdep.c:5191)
[ 1.150960][ T1] ? kvm_sched_clock_read (arch/x86/kernel/kvmclock.c:91)
[ 1.150960][ T1] ? sched_clock_noinstr (arch/x86/kernel/tsc.c:272)
[ 1.150960][ T1] ? local_clock_noinstr (kernel/sched/clock.c:272 kernel/sched/clock.c:309)
[ 1.150960][ T1] ? kvm_sched_clock_read (arch/x86/kernel/kvmclock.c:91)
[ 1.150960][ T1] ? sched_clock_noinstr (arch/x86/kernel/tsc.c:272)
[ 1.150960][ T1] ? local_clock_noinstr (kernel/sched/clock.c:272 kernel/sched/clock.c:309)
[ 1.150960][ T1] ? local_clock (arch/x86/include/asm/preempt.h:95 kernel/sched/clock.c:319)
[ 1.150960][ T1] ? irqtime_account_irq (kernel/sched/cputime.c:?)
[ 1.150960][ T1] ? irqtime_account_delta (include/linux/seqlock.h:452 include/linux/seqlock.h:524 include/linux/u64_stats_sync.h:152 include/linux/u64_stats_sync.h:188 kernel/sched/cputime.c:49)
[ 1.150960][ T1] ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:80)
[ 1.150960][ T1] ? irqentry_exit (kernel/entry/common.c:?)
[ 1.150960][ T1] ? common_interrupt (arch/x86/kernel/irq.c:319)
[ 1.150960][ T1] ? asm_common_interrupt (arch/x86/include/asm/idtentry.h:688)
[ 1.150960][ T1] ? strlen (arch/x86/lib/string_32.c:?)
[ 1.150960][ T1] ? next_arg (lib/cmdline.c:273)
[ 1.150960][ T1] ? parameq (kernel/params.c:90 kernel/params.c:99)
[ 1.150960][ T1] ? exar_pci_driver_init (drivers/tty/serial/8250/8250_exar_st16c554.c:32)
[ 1.150960][ T1] ? do_initcall_level (init/main.c:1439)
[ 1.150960][ T1] ? do_initcalls (init/main.c:1453)
[ 1.150960][ T1] ? rest_init (init/main.c:1570)
[ 1.150960][ T1] ? do_basic_setup (init/main.c:1476)
[ 1.150960][ T1] ? kernel_init_freeable (init/main.c:1690)
[ 1.150960][ T1] ? kernel_init (init/main.c:1580)
[ 1.150960][ T1] ? ret_from_fork (arch/x86/kernel/process.c:164)
[ 1.150960][ T1] ? __switch_to_asm (arch/x86/entry/entry_32.S:704)
[ 1.150960][ T1] ? __switch_to_asm (arch/x86/entry/entry_32.S:704)
[ 1.150960][ T1] ? rest_init (init/main.c:1570)
[ 1.150960][ T1] ? ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 1.150960][ T1] ? entry_INT80_32 (arch/x86/entry/entry_32.S:945)
[ 1.368042][ T1] CHRDEV "ttyARC" minor range requested (0-4294967294) is out of range of maximum range (0-1048575) for a single major
[ 1.369474][ T1] CHRDEV "ttyLP" minor range requested (0-4294967294) is out of range of maximum range (0-1048575) for a single major
[ 1.370859][ T1] CHRDEV "ttySIF" minor range requested (0-4294967294) is out of range of maximum range (0-1048575) for a single major
[ 1.385171][ T1] Rounding down aligned max_sectors from 4294967295 to 4294967288
[ 1.387226][ T1] db_root: cannot open: /etc/target
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251217/202512172240.63ac762f-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2025-12-17 14:15 [jirislaby:devel] [serial] 2dd9c2acfb: WARNING:held_lock_freed kernel test robot
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