Re: ❌ FAIL (MISSED 10 of 54): Test report for for-kernelci (7.4.0-rc1, upstream-arm-next, 6628e7d4)

[Catalin Marinas <catalin.marinas@arm.com>]

On Mon, Nov 02, 2026 at 01:53:04PM -0000, cki-project@redhat.com wrote:
> Hi, we tested your kernel and here are the results:
> 
>     Overall result: FAILED
>              Merge: OK
>            Compile: OK
>               Test: FAILED
> 
> 
> Kernel information:
>     Commit message: Linux 7.4-rc1
> 
> You can find all the details about the test run at
>     https://datawarehouse.cki-project.org/kcidb/checkouts/redhat:3017229113
> 
> One or more kernel tests failed:
>     Unrecognized or new issues:
>         Boot test
>              aarch64
>                    Logs: https://datawarehouse.cki-project.org/kcidb/tests/redhat:3017229113_aarch64_kernel_kcidb_tool_1200606255_6
>                    Non-passing ran subtests:
>                        ❌ FAIL Panic: Oops:
>                        ⚡ ERROR Warn: External Watchdog Expired

This one doesn't seem to have a console log.

>         Storage - blktests - throtl
>              aarch64
>                    Logs: https://datawarehouse.cki-project.org/kcidb/tests/redhat:3017229113_aarch64_kernel_kcidb_tool_1200606256_8
>                    Non-passing ran subtests:
>                        ❌ FAIL Panic: Oops:
>                        ⚡ ERROR Warn: External Watchdog Expired

Kernel panic here but not arm64 specific. It looks like a possible
scsi_debug teardown race. IIUC, b402a0dce64a ("scsi: scsi_debug: Fix
create target debugfs failure") fixes the synchronization before target
creation but not on module exit. The bug is probably from f084fe52c640
("scsi: scsi_debug: Add debugfs interface to fail target reset") if I
look at the recent fix.

Adding some linux-scsi people. The panic from the log:

  run blktests throtl/001 at 2026-11-02 12:17:14 
  sd 48:0:0:0: [sdb] Synchronizin 
  sd 48:0:0:0: [sdb] Synchronizing SCSI cache 
  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098 
  Mem abort info: 
    ESR = 0x0000000096000004 
    EC = 0x25: DABT (current EL), IL = 32 bits 
    SET = 0, FnV = 0 
    EA = 0, S1PTW = 0 
    FSC = 0x04: level 0 translation fault 
  Data abort info: 
    ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 
    CM = 0, WnR = 0, TnD = 0, TagAccess = 0 
    GCS = 0, Overlay = 0, DirtyBit = 0 
  user pgtable: 4k pages, 48-bit VAs, pgdp=000008001137a000 
  [0000000000000098] pgd=0000000000000000, p4d=0000000000000000 
  Internal error: Oops: 0000000096000004 [#1]  SMP 
  Modules linked in: null_blk scsi_debug(-) sunrpc rfkill vfat fat cppc_cpufreq acpi_ipmi ipmi_ssif ipmi_devintf ipmi_msghandler igb arm_spe_pmu arm_dmc620_pmu arm_cmn arm_dsu_pmu acpi_tad acpiphp_ampere_altra fuse zram lz4hc_compress xfs ghash_ce onboard_usb_dev gf128mul sbsa_gwdt ast i2c_algo_bit xgene_hwmon i2c_dev [last unloaded: null_blk] 
  CPU: 111 UID: 0 PID: 5282 Comm: kworker/u624:1 Not tainted 7.4.0-rc1 #1 PREEMPT(lazy)  
  Hardware name: GIGABYTE R152-P31-00/MP32-AR1-00, BIOS F31n (SCP: 2.10.20220810) 09/30/2022 
  Workqueue: async async_run_entry_fn 
  pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) 
  pc : down_write+0x30/0xc0 
  lr : __simple_recursive_removal+0x64/0x200 
  sp : ffff800087713c70 
  x29: ffff800087713c70 x28: 0000000000000098 x27: 0000000000000000 
  x26: 0000000040000200 x25: 0000000000000200 x24: ffffb32d18b6e0f8 
  x23: 0000000000000001 x22: ffff07ffab302c00 x21: 000000262b740085 
  x20: 0000000000000000 x19: ffff07ffab302c00 x18: 000000000000006f 
  x17: 643d4d4554535953 x16: ffffb32d19b31ac0 x15: ffffb32d1bfe2200 
  x14: 0000000000000000 x13: 0000000000000028 x12: 0101010101010101 
  x11: 7f7f7f7f7f7f7f7f x10: fefefefefefefeff x9 : ffffb32d189f35dc 
  x8 : 00000026177d76b0 x7 : ffffb32d1bfde000 x6 : ffffb32d185cf628 
  x5 : 000000000002d078 x4 : 0000000000000064 x3 : ffffff8000000000 
  x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000098 
  Call trace: 
   down_write+0x30/0xc0 (P) 
   __simple_recursive_removal+0x64/0x200 
   simple_recursive_removal+0x1c/0x30 
   debugfs_remove+0x64/0x88 
   sdebug_tartget_cleanup_async+0x24/0x48 [scsi_debug] 
   async_run_entry_fn+0x40/0x198 
   process_one_work+0x1b4/0x4b8 
   worker_thread+0x18c/0x2f0 
   kthread+0x128/0x150 
   ret_from_fork+0x10/0x20 
  Code: b9001041 d503201f d2800001 d2800022 (c8e17c02)  

-- 
Catalin