Warning: Permanently added '10.128.1.146' (ED25519) to the list of known hosts. executing program [ 42.103261][ T5035] sysfs: cannot create duplicate filename '/devices/virtual/tty/gsmtty1' [ 42.111704][ T5035] CPU: 1 PID: 5035 Comm: syz-executor112 Not tainted 6.7.0-rc8-syzkaller-00055-g5eff55d725a4 #0 [ 42.122120][ T5035] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 42.132172][ T5035] Call Trace: [ 42.135450][ T5035] [ 42.138381][ T5035] dump_stack_lvl+0x72/0xa0 [ 42.142912][ T5035] sysfs_warn_dup+0x64/0x70 [ 42.147425][ T5035] sysfs_create_dir_ns+0x123/0x140 [ 42.152544][ T5035] kobject_add_internal+0x104/0x340 [ 42.157760][ T5035] kobject_add+0xd0/0x140 [ 42.162093][ T5035] ? device_add+0x71a/0xc90 [ 42.166613][ T5035] device_add+0x142/0xc90 [ 42.170966][ T5035] tty_register_device_attr+0x16b/0x310 [ 42.176524][ T5035] gsm_activate_mux+0xd9/0x1c0 [ 42.181296][ T5035] gsmld_ioctl+0x6cf/0x9f0 [ 42.185725][ T5035] ? gsm_dlci_config+0x620/0x620 [ 42.190672][ T5035] tty_ioctl+0x3eb/0xc70 [ 42.194922][ T5035] ? do_vfs_ioctl+0x24c/0xe80 [ 42.199617][ T5035] ? __tty_hangup.part.0+0x450/0x450 [ 42.204927][ T5035] __x64_sys_ioctl+0xf2/0x140 [ 42.209594][ T5035] do_syscall_64+0x3f/0x110 [ 42.214104][ T5035] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 42.219984][ T5035] RIP: 0033:0x7f60b9374fc9 [ 42.224377][ T5035] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 1b 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 [ 42.243970][ T5035] RSP: 002b:00007f60b930d238 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 42.252357][ T5035] RAX: ffffffffffffffda RBX: 00007f60b9417318 RCX: 00007f60b9374fc9 [ 42.260308][ T5035] RDX: 0000000020000000 RSI: 0000000040204706 RDI: 0000000000000003 [ 42.268256][ T5035] RBP: 00007f60b9417310 R08: 00007ffc3a67c347 R09: 00007f60b930d6c0 [ 42.276205][ T5035] R10: 0000000000000000 R11: 0000000000000246 R12: 6d74702f7665642f [ 42.284165][ T5035] R13: 000000000000006e R14: 00007ffc3a67c260 R15: 00007ffc3a67c348 [ 42.292138][ T5035] [ 42.295303][ T5035] kobject: kobject_add_internal failed for gsmtty1 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.094250][ T5027] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) BUG: memory leak unreferenced object 0xffff888144ec8000 (size 1024): comm "syz-executor112", pid 5029, jiffies 4294941448 (age 7.990s) hex dump (first 32 bytes): 00 9c ec 44 81 88 ff ff 00 00 00 00 00 00 00 00 ...D............ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] __kmem_cache_alloc_node+0x2dd/0x3f0 [] kmalloc_trace+0x25/0x90 [] gsm_dlci_alloc+0x27/0x1f0 [] gsm_activate_mux+0x1c/0x1c0 [] gsmld_ioctl+0x6cf/0x9f0 [] tty_ioctl+0x3eb/0xc70 [] __x64_sys_ioctl+0xf2/0x140 [] do_syscall_64+0x3f/0x110 [] entry_SYSCALL_64_after_hwframe+0x63/0x6b BUG: memory leak unreferenced object 0xffff8881079f2000 (size 4096): comm "syz-executor112", pid 5029, jiffies 4294941448 (age 7.990s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] __kmem_cache_alloc_node+0x2dd/0x3f0 [] __kmalloc+0x4b/0x150 [] __kfifo_alloc+0x89/0xe0 [] gsm_dlci_alloc+0x71/0x1f0 [] gsm_activate_mux+0x1c/0x1c0 [] gsmld_ioctl+0x6cf/0x9f0 [] tty_ioctl+0x3eb/0xc70 [] __x64_sys_ioctl+0xf2/0x140 [] do_syscall_64+0x3f/0x110 [] entry_SYSCALL_64_after_hwframe+0x63/0x6b