On Fri, Aug 16, 2024 at 11:20 PM syzbot <syzbot+b5e01354ba4aea02654b@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: d74da846046a Merge tag 'platform-drivers-x86-v6.11-3' of g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=15717e6b980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=801d05d1ea4be1b8 > dashboard link: https://syzkaller.appspot.com/bug?extid=b5e01354ba4aea02654b > compiler: Debian clang version 15.0.6, 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/abf3bd7fae83/disk-d74da846.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/ab1df710091d/vmlinux-d74da846.xz > kernel image: https://storage.googleapis.com/syzbot-assets/de4fcc24c87c/bzImage-d74da846.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+b5e01354ba4aea02654b@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: double-free in dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] > BUG: KASAN: double-free in kref_put+0x4a8/0x7c0 include/linux/kref.h:65 > Free of addr ffff88807ce9ef00 by task syz.1.6138/1440 > > CPU: 0 UID: 0 PID: 1440 Comm: syz.1.6138 Not tainted 6.11.0-rc3-syzkaller-00007-gd74da846046a #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:93 [inline] > dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 > print_address_description mm/kasan/report.c:377 [inline] > print_report+0x169/0x550 mm/kasan/report.c:488 > kasan_report_invalid_free+0x11a/0x140 mm/kasan/report.c:563 > poison_slab_object+0xf4/0x150 > __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 > kasan_slab_free include/linux/kasan.h:184 [inline] > slab_free_hook mm/slub.c:2252 [inline] > slab_free mm/slub.c:4473 [inline] > kfree+0x149/0x360 mm/slub.c:4594 > dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] > kref_put+0x4a8/0x7c0 include/linux/kref.h:65 > raw_release+0x138/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:473 > __fput+0x24a/0x8a0 fs/file_table.c:422 > __do_sys_close fs/open.c:1566 [inline] > __se_sys_close fs/open.c:1551 [inline] > __x64_sys_close+0x7f/0x110 fs/open.c:1551 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f256497868a > Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 13 8b 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 73 8b 02 00 8b 44 24 > RSP: 002b:00007f25657f0ff0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 > RAX: ffffffffffffffda RBX: 00007f2564b16058 RCX: 00007f256497868a > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009 > RBP: 00007f25649e78ee R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000009 R11: 0000000000000293 R12: 0000000000000000 > R13: 0000000000000000 R14: 00007f2564b16058 R15: 00007f2564c3fa38 > </TASK> > > Allocated by task 1440: > kasan_save_stack mm/kasan/common.c:47 [inline] > kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 > poison_kmalloc_redzone mm/kasan/common.c:370 [inline] > __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 > kasan_kmalloc include/linux/kasan.h:211 [inline] > __do_kmalloc_node mm/slub.c:4158 [inline] > __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4177 > memdup_user+0x2b/0xc0 mm/util.c:226 > raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline] > raw_ioctl+0xd0f/0x3cd0 drivers/usb/gadget/legacy/raw_gadget.c:1318 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:907 [inline] > __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > Freed by task 1419: > kasan_save_stack mm/kasan/common.c:47 [inline] > kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 > kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 > poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 > __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 > kasan_slab_free include/linux/kasan.h:184 [inline] > slab_free_hook mm/slub.c:2252 [inline] > slab_free mm/slub.c:4473 [inline] > kfree+0x149/0x360 mm/slub.c:4594 > dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] > kref_put+0x4a8/0x7c0 include/linux/kref.h:65 > raw_release+0x138/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:473 > __fput+0x24a/0x8a0 fs/file_table.c:422 > __do_sys_close fs/open.c:1566 [inline] > __se_sys_close fs/open.c:1551 [inline] > __x64_sys_close+0x7f/0x110 fs/open.c:1551 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > The buggy address belongs to the object at ffff88807ce9ef00 > which belongs to the cache kmalloc-16 of size 16 > The buggy address is located 0 bytes inside of > 16-byte region [ffff88807ce9ef00, ffff88807ce9ef10) > > The buggy address belongs to the physical page: > page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ce9e > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) > page_type: 0xfdffffff(slab) > raw: 00fff00000000000 ffff888015841640 dead000000000100 dead000000000122 > raw: 0000000000000000 0000000080800080 00000001fdffffff 0000000000000000 > page dumped because: kasan: bad access detected > page_owner tracks the page as allocated > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 605, tgid 605 (syz-executor), ts 2161207442978, free_ts 2155687277813 > set_page_owner include/linux/page_owner.h:32 [inline] > post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 > prep_new_page mm/page_alloc.c:1501 [inline] > get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442 > __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700 > __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] > alloc_pages_node_noprof include/linux/gfp.h:296 [inline] > alloc_slab_page+0x5f/0x120 mm/slub.c:2321 > allocate_slab+0x5a/0x2f0 mm/slub.c:2484 > new_slab mm/slub.c:2537 [inline] > ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 > __slab_alloc+0x58/0xa0 mm/slub.c:3813 > __slab_alloc_node mm/slub.c:3866 [inline] > slab_alloc_node mm/slub.c:4025 [inline] > __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 > kmalloc_noprof include/linux/slab.h:681 [inline] > kzalloc_noprof include/linux/slab.h:807 [inline] > apparmor_sk_alloc_security+0x77/0x100 security/apparmor/lsm.c:1065 > security_sk_alloc+0x75/0xb0 security/security.c:4689 > sk_prot_alloc+0xfa/0x210 net/core/sock.c:2099 > sk_alloc+0x38/0x370 net/core/sock.c:2149 > inet_create+0x652/0xe70 net/ipv4/af_inet.c:326 > __sock_create+0x490/0x920 net/socket.c:1571 > sock_create net/socket.c:1622 [inline] > __sys_socket_create net/socket.c:1659 [inline] > __sys_socket+0x150/0x3c0 net/socket.c:1706 > __do_sys_socket net/socket.c:1720 [inline] > __se_sys_socket net/socket.c:1718 [inline] > __x64_sys_socket+0x7a/0x90 net/socket.c:1718 > page last free pid 30679 tgid 30679 stack trace: > reset_page_owner include/linux/page_owner.h:25 [inline] > free_pages_prepare mm/page_alloc.c:1094 [inline] > free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612 > rcu_do_batch kernel/rcu/tree.c:2569 [inline] > rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843 > handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 > __do_softirq kernel/softirq.c:588 [inline] > invoke_softirq kernel/softirq.c:428 [inline] > __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 > irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 > instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] > sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 > asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 > > Memory state around the buggy address: > ffff88807ce9ee00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc > ffff88807ce9ee80: 00 00 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc > >ffff88807ce9ef00: fa fb fc fc fa fb fc fc 00 03 fc fc fa fb fc fc > ^ > ffff88807ce9ef80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc > ffff88807ce9f000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc > ================================================================== > > > --- > 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 #syz dup: KASAN: invalid-free in dev_free
