Hello, syzbot found the following issue on: HEAD commit: 7c16f0a4ed1c Merge tag 'i2c-for-6.10-rc5' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10e04151980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d112b9ab538ebab dashboard link: https://syzkaller.appspot.com/bug?extid=2cab87506a0e7885f4b9 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b29845d4c0ce/disk-7c16f0a4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e39e5d18a392/vmlinux-7c16f0a4.xz kernel image: https://storage.googleapis.com/syzbot-assets/f6ac8c44d142/bzImage-7c16f0a4.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2cab87506a0e7885f4b9@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ strnlen: detected buffer overflow: 17 byte read of buffer size 16 WARNING: CPU: 1 PID: 19420 at lib/string_helpers.c:1029 __fortify_report+0x9c/0xd0 lib/string_helpers.c:1029 Modules linked in: CPU: 1 PID: 19420 Comm: syz-executor.1 Not tainted 6.10.0-rc4-syzkaller-00330-g7c16f0a4ed1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__fortify_report+0x9c/0xd0 lib/string_helpers.c:1029 Code: ed 48 c7 c0 20 c9 8f 8b 48 0f 44 d8 e8 8d 53 0b fd 4d 89 e0 48 89 ea 48 89 d9 4c 89 f6 48 c7 c7 a0 c9 8f 8b e8 e5 6e cd fc 90 <0f> 0b 90 90 5b 5d 41 5c 41 5d 41 5e e9 3e 67 8c 06 48 89 de 48 c7 RSP: 0018:ffffc90004c2fbf0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff8b8fc920 RCX: ffffc9000bb9b000 RDX: 0000000000040000 RSI: ffffffff81514a46 RDI: 0000000000000001 RBP: 0000000000000011 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000010 R13: 0000000000000000 R14: ffffffff8b8fd2e0 R15: ffff88802bb42060 FS: 00007f6eba6e46c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff2d1cbc28 CR3: 0000000062552000 CR4: 0000000000350ef0 Call Trace: <TASK> __fortify_panic+0x23/0x30 lib/string_helpers.c:1036 strnlen include/linux/fortify-string.h:235 [inline] sized_strscpy include/linux/fortify-string.h:309 [inline] ext4_ioctl_getlabel fs/ext4/ioctl.c:1154 [inline] __ext4_ioctl+0x404d/0x4580 fs/ext4/ioctl.c:1609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x196/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6eb987d0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6eba6e40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6eb99b3f80 RCX: 00007f6eb987d0a9 RDX: 0000000020000100 RSI: 0000000081009431 RDI: 0000000000000003 RBP: 00007f6eb98ec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6eb99b3f80 R15: 00007ffcd312f958 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
