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Message-ID: <686dbe21.050a0220.1ffab7.0029.GAE@google.com> Date: Tue, 08 Jul 2025 17:56:01 -0700 From: syzbot <syzbot+3f89ec3d1d0842e95d50@...kaller.appspotmail.com> To: hdanton@...a.com, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [usb?] WARNING in usbnet_status_start Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in usbnet_probe Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 1117 Comm: kworker/1:2 Not tainted 6.16.0-rc4-syzkaller-00311-gd1b07cc0868f-dirty #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:init_status drivers/net/usb/usbnet.c:234 [inline] RIP: 0010:usbnet_probe+0xf4e/0x2810 drivers/net/usb/usbnet.c:1818 Code: 48 c1 ea 03 80 3c 02 00 0f 85 a2 15 00 00 49 8b 87 20 0e 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 78 02 48 89 f9 48 c1 e9 03 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 f4 11 00 00 RSP: 0018:ffffc90001c2efa8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888114c4b000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8491bef0 RDI: 0000000000000002 RBP: ffffffff87c293e0 R08: 0000000000000004 R09: 00000000000005dc R10: 00000000000005dc R11: 0000000000000001 R12: ffffffff8492f590 R13: ffff888114c4a000 R14: ffff888107be40b4 R15: ffff888107be4000 FS: 0000000000000000(0000) GS:ffff888269262000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3205ffff CR3: 000000011fb4c000 CR4: 00000000003506f0 Call Trace: <TASK> sierra_net_probe+0x1c/0xb0 drivers/net/usb/sierra_net.c:925 usb_probe_interface+0x303/0x9c0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:657 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957 bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1a70 drivers/base/core.c:3692 usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x3e0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:657 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957 bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1a70 drivers/base/core.c:3692 usb_new_device+0xd07/0x1a20 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5866 [inline] hub_event+0x2f85/0x5030 drivers/usb/core/hub.c:5948 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x5b3/0x6c0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:init_status drivers/net/usb/usbnet.c:234 [inline] RIP: 0010:usbnet_probe+0xf4e/0x2810 drivers/net/usb/usbnet.c:1818 Code: 48 c1 ea 03 80 3c 02 00 0f 85 a2 15 00 00 49 8b 87 20 0e 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 78 02 48 89 f9 48 c1 e9 03 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 f4 11 00 00 RSP: 0018:ffffc90001c2efa8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888114c4b000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8491bef0 RDI: 0000000000000002 RBP: ffffffff87c293e0 R08: 0000000000000004 R09: 00000000000005dc R10: 00000000000005dc R11: 0000000000000001 R12: ffffffff8492f590 R13: ffff888114c4a000 R14: ffff888107be40b4 R15: ffff888107be4000 FS: 0000000000000000(0000) GS:ffff888269262000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3205ffff CR3: 0000000008ea4000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 a2 15 00 00 jne 0x15b0 e: 49 8b 87 20 0e 00 00 mov 0xe20(%r15),%rax 15: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 1c: fc ff df 1f: 48 8d 78 02 lea 0x2(%rax),%rdi 23: 48 89 f9 mov %rdi,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx <-- trapping instruction 2e: 48 89 f9 mov %rdi,%rcx 31: 83 e1 07 and $0x7,%ecx 34: 38 ca cmp %cl,%dl 36: 7f 08 jg 0x40 38: 84 d2 test %dl,%dl 3a: 0f 85 f4 11 00 00 jne 0x1234 Tested on: commit: d1b07cc0 arm64: dts: s32g: Add USB device tree informa.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=101c3582580000 kernel config: https://syzkaller.appspot.com/x/.config?x=28729dff5d03ad1 dashboard link: https://syzkaller.appspot.com/bug?extid=3f89ec3d1d0842e95d50 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=141bca8c580000
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