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n9-20020a170902e54900b001c1df8067efmr1021365plf.1.1694101433384; Thu, 07 Sep 2023 08:43:53 -0700 (PDT) Date: Thu, 07 Sep 2023 08:43:53 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002683d00604c6bafe@google.com> Subject: [syzbot] [kernel?] general protection fault in hci_register_dev From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 92901222f83d Merge tag 'f2fs-for-6-6-rc1' of git://git.ker.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13585198680000 kernel config: https://syzkaller.appspot.com/x/.config?x=3bd57a1ac08277b0 dashboard link: https://syzkaller.appspot.com/bug?extid=410a8e33c6a740b40d51 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14df7104680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=125a5357a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ee486d884228/disk-92901222.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b5187db0b1d1/vmlinux-92901222.xz kernel image: https://storage.googleapis.com/syzbot-assets/82c4e42d693e/bzImage-92901222.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+410a8e33c6a740b40d51@syzkaller.appspotmail.com RBP: 0000000000000002 R08: 00007ffcb6e971b6 R09: 00000000000000a0 R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffcb6e9742c R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 5034 Comm: syz-executor191 Not tainted 6.5.0-syzkaller-11075-g92901222f83d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 Code: 01 ae f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 RSP: 0018:ffffc9000440fa90 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffc9000440fb20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000440fb20 R13: 0000000000000cc0 R14: ffff888020187f80 R15: 0000000000000001 FS: 00005555569f8380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f13479ea6a4 CR3: 0000000020b59000 CR4: 0000000000350ef0 Call Trace: kvasprintf_const+0x25/0x190 lib/kasprintf.c:45 kobject_set_name_vargs+0x5a/0x130 lib/kobject.c:272 kobject_add_varg lib/kobject.c:366 [inline] kobject_add+0x12a/0x240 lib/kobject.c:424 device_add+0x290/0x1ac0 drivers/base/core.c:3560 hci_register_dev+0x2f2/0xbc0 net/bluetooth/hci_core.c:2644 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:688 [inline] hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:712 [inline] hci_uart_tty_ioctl+0x83e/0xc70 drivers/bluetooth/hci_ldisc.c:765 tty_ioctl+0x6fd/0x1580 drivers/tty/tty_io.c:2785 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f134798cd39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcb6e97418 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffcb6e97430 RCX: 00007f134798cd39 RDX: 0000000000000000 RSI: 00000000400455c8 RDI: 0000000000000003 RBP: 0000000000000002 R08: 00007ffcb6e971b6 R09: 00000000000000a0 R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffcb6e9742c R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 Code: 01 ae f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 RSP: 0018:ffffc9000440fa90 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffc9000440fb20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000440fb20 R13: 0000000000000cc0 R14: ffff888020187f80 R15: 0000000000000001 FS: 00005555569f8380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f13479ea6a4 CR3: 0000000020b59000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 01 ae f7 48 8b 74 add %ebp,0x748b48f7(%rsi) 6: 24 08 and $0x8,%al 8: 48 8b 14 24 mov (%rsp),%rdx c: eb 89 jmp 0xffffff97 e: 90 nop f: f3 0f 1e fa endbr64 13: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1a: fc ff df 1d: 48 89 fa mov %rdi,%rdx 20: 55 push %rbp 21: 48 c1 ea 03 shr $0x3,%rdx 25: 53 push %rbx 26: 48 83 ec 10 sub $0x10,%rsp * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 48 89 fa mov %rdi,%rdx 31: 83 e2 07 and $0x7,%edx 34: 38 d0 cmp %dl,%al 36: 7f 04 jg 0x3c 38: 84 c0 test %al,%al 3a: 75 51 jne 0x8d 3c: 0f b6 07 movzbl (%rdi),%eax 3f: 89 .byte 0x89 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup