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AHgh+RqCs6dAowRkvIPO3G/WGGHaeEnIjYne8p49QmmSi2pdclh6ZzpySIVkhl9N6w8uT3DEVh1JeYH1q0gHPQc=@vger.kernel.org X-Gm-Message-State: AOJu0YzTvzVsOwapcHneNjp1bHVbxp+UdnM0qvKlQTffKEaHxUg7uNS4 FpiR5yGkhURNXXY5V5Rj3rFsHgUQ4jZgT2LwOa1DK4CfF6ntDTSxSrsBpD3hm1At+//2KjY3KX7 p4X7/exhLgW9jzQ0iYsv2lVYDQNcAfka/sMZgl+KFYUJV8qY8dj4E8CU+Nao= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f08:b0:6b1:327:e45 with SMTP id 006d021491bc7-6b13c5c2f53mr4735791eaf.28.1787151568549; Wed, 19 Aug 2026 07:59:28 -0700 (PDT) Date: Wed, 19 Aug 2026 07:59:28 -0700 In-Reply-To: <6a6d3f99.13bfb6d0.1ecdd5.0254.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a85c4d0.c8649fcc.3bb87.0012.GAE@google.com> Subject: Re: [syzbot] [usb?] general protection fault in rebind_store From: syzbot To: gregkh@linuxfoundation.org, i@zenithal.me, jeffinphilip14@gmail.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, shuah@kernel.org, skhan@linuxfoundation.org, stable@vger.kernel.org, syzkaller-bugs@googlegroups.com, valentina.manea.m@gmail.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 21d6ac051080 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=130c3a25580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=af76b01c9a0f0ab60fb0 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e47815580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15af7679580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/88380e2ddcb9/disk-21d6ac05.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5dba5c2896b7/vmlinux-21d6ac05.xz kernel image: https://storage.googleapis.com/syzbot-assets/52ac739e37e0/Image-21d6ac05.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+af76b01c9a0f0ab60fb0@syzkaller.appspotmail.com Unable to handle kernel paging request at virtual address dfff80000000001e KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 [dfff80000000001e] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 4959 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 03400005 (nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : do_rebind drivers/usb/usbip/stub_main.c:204 [inline] pc : rebind_store+0xb8/0x204 drivers/usb/usbip/stub_main.c:264 lr : spin_unlock include/linux/spinlock.h:390 [inline] lr : put_busid_priv drivers/usb/usbip/stub_main.c:85 [inline] lr : rebind_store+0x94/0x204 drivers/usb/usbip/stub_main.c:262 sp : ffff80009a7579a0 x29: ffff80009a7579a0 x28: ffff80009a757b68 x27: 1fffe00019788f80 x26: 1fffe00019788fa9 x25: 1ffff00011d58696 x24: dfff800000000000 x23: dfff800000000000 x22: 00000000000000f0 x21: ffff80008eac34b0 x20: ffff0000c667d000 x19: 0000000000000004 x18: 00000000ffffffff x17: ffff80008a7d6000 x16: 0000000000000004 x15: ffff80008a35fda0 x14: ffff80008a5d5e28 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000001 x9 : dfff800000000000 x8 : 000000000000001e x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff80008a9961f0 x4 : 0000000000000008 x3 : ffff80008046a5e0 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: do_rebind drivers/usb/usbip/stub_main.c:204 [inline] (P) rebind_store+0xb8/0x204 drivers/usb/usbip/stub_main.c:264 (P) drv_attr_store+0x80/0xa4 drivers/base/bus.c:125 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Code: 975283bb f94002a8 9103c116 d343fec8 (38786908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 975283bb bl 0xfffffffffd4a0eec 4: f94002a8 ldr x8, [x21] 8: 9103c116 add x22, x8, #0xf0 c: d343fec8 lsr x8, x22, #3 * 10: 38786908 ldrb w8, [x8, x24] <-- trapping instruction --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.