=========================[ 1719.640981][T25899] ==================================================================
BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline]
BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x8d/0x640 drivers/usb/atm/ueagle-atm.c:598
Read of size 8 at addr ffff888066cc60b8 by task kworker/1:16/25899

CPU: 1 UID: 0 PID: 25899 Comm: kworker/1:16 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __intf_to_usbdev include/linux/usb.h:752 [inline]
 uea_upload_pre_firmware+0x8d/0x640 drivers/usb/atm/ueagle-atm.c:598
 request_firmware_work_func+0xf7/0x2d0 drivers/base/firmware_loader/main.c:1164
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 4950:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x3cd/0x670 mm/slub.c:5491
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 syslog_print+0x103/0x610 kernel/printk/printk.c:1585
 do_syslog+0x583/0x7d0 kernel/printk/printk.c:1763
 __do_sys_syslog kernel/printk/printk.c:1855 [inline]
 __se_sys_syslog kernel/printk/printk.c:1853 [inline]
 __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1853
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 4950:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2705 [inline]
 slab_free mm/slub.c:6381 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6696
 syslog_print+0x57c/0x610 kernel/printk/printk.c:1677
 do_syslog+0x583/0x7d0 kernel/printk/printk.c:1763
 __do_sys_syslog kernel/printk/printk.c:1855 [inline]
 __se_sys_syslog kernel/printk/printk.c:1853 [inline]
 __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1853
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888066cc6000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 184 bytes inside of
 freed 2048-byte region [ffff888066cc6000, ffff888066cc6800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888066cc5000 pfn:0x66cc0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000240(workingset|head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000240 ffff88813fe3a000 ffffea00017d6a10 ffffea0000a8c010
raw: ffff888066cc5000 0000000800080007 00000000f5000000 0000000000000000
head: 0080000000000240 ffff88813fe3a000 ffffea00017d6a10 ffffea0000a8c010
head: ffff888066cc5000 0000000800080007 00000000f5000000 0000000000000000
head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 57, tgid 57 (kworker/u8:3), ts 323834881261
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1861
 prep_new_page mm/page_alloc.c:1869 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x1a6/0x390 mm/page_alloc.c:5313
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab+0x79/0x5e0 mm/slub.c:3408
 new_slab mm/slub.c:3454 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7314
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4697
 alloc_from_pcs mm/slub.c:4773 [inline]
 slab_alloc_node mm/slub.c:4907 [inline]
 __do_kmalloc_node mm/slub.c:5335 [inline]
 __kmalloc_node_track_caller_noprof+0x616/0x7b0 mm/slub.c:5473
 kmalloc_reserve net/core/skbuff.c:637 [inline]
 __alloc_skb+0x2bd/0x7a0 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1384 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_ifinfo_notify+0x70/0x120 net/ipv6/addrconf.c:6215
 addrconf_notify+0xca0/0x1050 net/ipv6/addrconf.c:3795
 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
 netif_state_change+0x27d/0x3a0 net/core/dev.c:1603
 __linkwatch_run_queue+0x52d/0x810 net/core/link_watch.c:240
 linkwatch_event+0x4c/0x60 net/core/link_watch.c:314
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
page last free pid 1028 tgid 1028 ts 323617061868 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1408 [inline]
 free_pages_prepare+0x935/0xa30 mm/page_alloc.c:1453
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:6906
 __free_contig_range mm/page_alloc.c:6951 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5265
 vm_area_free_pages mm/vmalloc.c:3470 [inline]
 vfree+0x26f/0x510 mm/vmalloc.c:3519
 hash_mac4_ahash_destroy net/netfilter/ipset/ip_set_hash_gen.h:446 [inline]
 hash_mac4_destroy+0x44a/0x630 net/netfilter/ipset/ip_set_hash_gen.h:456
 _destroy_all_sets+0x57b/0x6c0 net/netfilter/ipset/ip_set_core.c:1220
 ip_set_net_exit+0x20/0x50 net/netfilter/ipset/ip_set_core.c:2409
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x43d/0x8d0 net/core/net_namespace.c:252
 cleanup_net+0x575/0x810 net/core/net_namespace.c:702
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff888066cc5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888066cc6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888066cc6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888066cc6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888066cc6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================