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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Feb 2026 09:11:09.7388 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: GogUSVQUqsElRt22Vo7CgF1mmZIJEI6YoG8t9Zik4ntniLq+1lUIy7rjefEUF5OQjxOHEBkRYU2reCnWLrn2mA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR11MB5184 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN" on: commit: 56a512a9b4107079f68701e7d55da8507eb963d9 ("usb: gadget: f_ncm: align net_device lifecycle with bind/unbind") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: boot config: x86_64-randconfig-002-20260217 compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G (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 | Closes: https://lore.kernel.org/oe-lkp/202602181727.fd76c561-lkp@intel.com [ 8.960483][ T1] usb usb1: SerialNumber: dummy_hcd.0 [ 8.962200][ T1] hub 1-0:1.0: USB hub found [ 8.963048][ T1] hub 1-0:1.0: 1 port detected [ 8.967283][ T1] file system registered [ 8.968024][ T1] udc dummy_udc.0: binding gadget driver [g_ncm] [ 8.968851][ T1] Oops: general protection fault, probably for non-canonical address 0xdffffc00000001a3: 0000 [#1] SMP KASAN [ 8.970049][ T1] KASAN: null-ptr-deref in range [0x0000000000000d18-0x0000000000000d1f] [ 8.970973][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G T 6.19.0-rc3-00025-g56a512a9b410 #1 PREEMPTLAZY [ 8.971938][ T1] Tainted: [T]=RANDSTRUCT [ 8.971938][ T1] RIP: 0010:gether_set_qmult (kbuild/src/consumer/drivers/usb/gadget/function/u_ether.c:988) [ 8.971938][ T1] Code: 00 00 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 e5 41 56 53 48 81 c7 18 0d 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 75 07 89 37 5b 41 5e 5d c3 89 f9 80 e1 07 80 c1 All code ======== 0: 00 00 add %al,(%rax) 2: f3 0f 1e fa endbr64 6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) b: 55 push %rbp c: 48 89 e5 mov %rsp,%rbp f: 41 56 push %r14 11: 53 push %rbx 12: 48 81 c7 18 0d 00 00 add $0xd18,%rdi 19: 48 89 f8 mov %rdi,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df 2a:* 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 75 07 jne 0x39 32: 89 37 mov %esi,(%rdi) 34: 5b pop %rbx 35: 41 5e pop %r14 37: 5d pop %rbp 38: c3 ret 39: 89 f9 mov %edi,%ecx 3b: 80 e1 07 and $0x7,%cl 3e: 80 .byte 0x80 3f: c1 .byte 0xc1 Code starting with the faulting instruction =========================================== 0: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax 4: 84 c0 test %al,%al 6: 75 07 jne 0xf 8: 89 37 mov %esi,(%rdi) a: 5b pop %rbx b: 41 5e pop %r14 d: 5d pop %rbp e: c3 ret f: 89 f9 mov %edi,%ecx 11: 80 e1 07 and $0x7,%cl 14: 80 .byte 0x80 15: c1 .byte 0xc1 [ 8.971938][ T1] RSP: 0018:ffff8881009df660 EFLAGS: 00010206 [ 8.971938][ T1] RAX: 00000000000001a3 RBX: ffff8881020fd400 RCX: dffffc0000000000 [ 8.971938][ T1] RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000d18 [ 8.971938][ T1] RBP: ffff8881009df670 R08: ffff8881009df5ef R09: 1ffff1102013bebd [ 8.971938][ T1] R10: dffffc0000000000 R11: ffffed102013bebe R12: dffffc0000000000 [ 8.971938][ T1] R13: 1ffff11020105216 R14: ffff8881296b4c00 R15: ffff8881008290b0 [ 8.971938][ T1] FS: 0000000000000000(0000) GS:ffff88879974e000(0000) knlGS:0000000000000000 [ 8.971938][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8.971938][ T1] CR2: 00007f70208af0ac CR3: 0000000004a7c000 CR4: 00000000000406f0 [ 8.971938][ T1] Call Trace: [ 8.971938][ T1] [ 8.971938][ T1] gncm_bind (kbuild/src/consumer/drivers/usb/gadget/legacy/ncm.c:140) [ 8.971938][ T1] ? gadget_bind_driver (kbuild/src/consumer/drivers/usb/gadget/udc/core.c:1629 (discriminator 1024)) [ 8.971938][ T1] composite_bind (kbuild/src/consumer/drivers/usb/gadget/composite.c:2553) [ 8.971938][ T1] ? suspended_show (kbuild/src/consumer/drivers/usb/gadget/composite.c:2529) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260218/202602181727.fd76c561-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki