Hello, syzbot found the following issue on: HEAD commit: 6b0f8db921ab Merge tag 'execve-v6.11-rc4' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=177484fd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=54e9d4be0c7a0d11 dashboard link: https://syzkaller.appspot.com/bug?extid=3e563d99e70973c0755c 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 (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-6b0f8db9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5829b92d3000/vmlinux-6b0f8db9.xz kernel image: https://storage.googleapis.com/syzbot-assets/0b382f2bc118/bzImage-6b0f8db9.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3e563d99e70973c0755c@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: double-free in dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 Free of addr ffff888107b54de0 by task syz.1.409/6669 CPU: 0 UID: 0 PID: 6669 Comm: syz.1.409 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:563 poison_slab_object+0x135/0x160 mm/kasan/common.c:232 __kasan_slab_free+0x32/0x50 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+0x12a/0x3b0 mm/slub.c:4594 dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 kref_put include/linux/kref.h:65 [inline] raw_release+0x188/0x2f0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x408/0xbb0 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1566 [inline] __se_sys_close fs/open.c:1551 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1551 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: 0033:0x7f0af717868a 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:00007f0af7f85ff0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007f0af7315f80 RCX: 00007f0af717868a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f0af71e78ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0af7315f80 R15: 00007ffd55eaee78 </TASK> Allocated by task 6671: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/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+0x20f/0x430 mm/slub.c:4177 memdup_user+0x2a/0xd0 mm/util.c:226 raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline] raw_ioctl+0xbca/0x2b90 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 fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 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 Freed by task 6669: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 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+0x12a/0x3b0 mm/slub.c:4594 dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 kref_put include/linux/kref.h:65 [inline] raw_release+0x188/0x2f0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x408/0xbb0 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1566 [inline] __se_sys_close fs/open.c:1551 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1551 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 The buggy address belongs to the object at ffff888107b54de0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff888107b54de0, ffff888107b54df0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107b54 flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 057ff00000000000 ffff888015842640 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000800080 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 0x352800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 5917, tgid 5917 (syz-executor), ts 274370933809, free_ts 273397742220 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3442 __alloc_pages_noprof+0x22b/0x2460 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+0x4e/0xf0 mm/slub.c:2321 allocate_slab mm/slub.c:2484 [inline] new_slab+0x84/0x260 mm/slub.c:2537 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_noprof+0x357/0x430 mm/slub.c:4164 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650 xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline] xt_replace_table+0x1c7/0x910 net/netfilter/x_tables.c:1394 __do_replace+0x1d9/0x9c0 net/ipv4/netfilter/arp_tables.c:912 do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline] do_ip6t_set_ctl+0x94b/0xc40 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x8a/0xf0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x133/0x1a0 net/ipv6/ipv6_sockglue.c:998 tcp_setsockopt+0xa4/0x100 net/ipv4/tcp.c:3768 do_sock_setsockopt+0x222/0x480 net/socket.c:2324 page last free pid 6016 tgid 6016 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4044 vm_area_dup+0x21/0x2f0 kernel/fork.c:486 __split_vma+0x181/0x11c0 mm/mmap.c:2465 split_vma mm/mmap.c:2537 [inline] vma_modify+0x1ec/0x360 mm/mmap.c:2571 vma_modify_flags include/linux/mm.h:3298 [inline] mprotect_fixup+0x220/0xc40 mm/mprotect.c:639 do_mprotect_pkey+0x9d7/0xd70 mm/mprotect.c:822 __do_sys_mprotect mm/mprotect.c:843 [inline] __se_sys_mprotect mm/mprotect.c:840 [inline] __x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:840 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 Memory state around the buggy address: ffff888107b54c80: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc ffff888107b54d00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc >ffff888107b54d80: fa fb fc fc 00 00 fc fc fa fb fc fc fa fb fc fc ^ ffff888107b54e00: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff888107b54e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb 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
