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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 ffff88805a73d0b8 by task kworker/0:2/822

CPU: 0 UID: 0 PID: 822 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
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 4947:
 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:5486
 _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:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 4947:
 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:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6703
 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:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88805a73d000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 184 bytes inside of
 freed 2048-byte region [ffff88805a73d000, ffff88805a73d800)
The buggy address is located 184 bytes inside of
 freed 2048-byte region [ffff88805a73d000, ffff88805a73d800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805a73a000 pfn:0x5a738
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 ffff88813fe40000 ffffea000085f410 ffffea0001785810
raw: ffff88805a73a000 0000000800080001 00000000f5000000 0000000000000000
head: 0080000000000240 ffff88813fe40000 ffffea000085f410 ffffea0001785810
head: ffff88805a73a000 0000000800080001 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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5602, tgid 5602 (syz-executor), ts 101295281633
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1870
 prep_new_page mm/page_alloc.c:1878 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3954
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5393
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __do_kmalloc_node mm/slub.c:5338 [inline]
 __kmalloc_node_track_caller_noprof+0x616/0x7b0 mm/slub.c:5468
 kmalloc_reserve net/core/skbuff.c:637 [inline]
 pskb_expand_head+0x22c/0x13a0 net/core/skbuff.c:2306
 netlink_trim+0x1b3/0x2c0 net/netlink/af_netlink.c:1300
 netlink_broadcast_filtered+0x6d/0xea0 net/netlink/af_netlink.c:1518
 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
 nlmsg_multicast include/net/netlink.h:1184 [inline]
 nlmsg_notify+0xe3/0x1a0 net/netlink/af_netlink.c:2599
 rtnl_notify net/core/rtnetlink.c:994 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:4589 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4605 [inline]
 rtnetlink_event+0x224/0x270 net/core/rtnetlink.c:7172
 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2292 [inline]
 call_netdevice_notifiers net/core/dev.c:2306 [inline]
 netif_set_mac_address+0x393/0x4d0 net/core/dev.c:10008
 dev_set_mac_address+0x10e/0x220 net/core/dev_api.c:339
 bond_enslave+0xe6d/0x3b70 drivers/net/bonding/bond_main.c:2077
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88805a73cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805a73d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805a73d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88805a73d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805a73d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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