================================================================== BUG: KASAN: slab-use-after-free in __raw_spin_lock_irq include/linux/spinlock_api_smp.h:165 [inline] BUG: KASAN: slab-use-after-free in _raw_spin_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:189 Read of size 1 at addr ffff888029b97018 by task syz.2.678/8383 CPU: 0 UID: 0 PID: 8383 Comm: syz.2.678 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: 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 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:574 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5916 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:165 [inline] _raw_spin_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:189 spin_lock_irq include/linux/spinlock.h:377 [inline] gadget_dev_open+0x4b/0x1b0 drivers/usb/gadget/legacy/inode.c:1929 do_dentry_open+0x80e/0x1360 fs/open.c:1000 vfs_open_consume+0x4a/0x350 fs/open.c:1131 do_open fs/namei.c:4913 [inline] path_openat+0x14d7/0x1e40 fs/namei.c:5078 do_file_open+0x23e/0x4a0 fs/namei.c:5107 do_sys_openat2+0x115/0x200 fs/open.c:1452 do_sys_open fs/open.c:1458 [inline] __do_sys_openat fs/open.c:1474 [inline] __se_sys_openat fs/open.c:1469 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1469 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc1cb99e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1cc82f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc1cbc25fa0 RCX: 00007fc1cb99e159 RDX: 0000000000000802 RSI: 0000200000000300 RDI: ffffffffffffff9c RBP: 00007fc1cba3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc1cbc26038 R14: 00007fc1cbc25fa0 R15: 00007fff73a06078 Allocated by task 38: 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] __do_kmalloc_node mm/slub.c:5419 [inline] __kmalloc_noprof+0x366/0x710 mm/slub.c:5444 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ieee802_11_parse_elems_full+0x14b/0x2de0 net/mac80211/parse.c:1071 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2548 [inline] ieee80211_inform_bss+0x163/0x10d0 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd9c/0x1be0 net/wireless/scan.c:2410 cfg80211_inform_bss_data+0x263/0x3cc0 net/wireless/scan.c:3266 cfg80211_inform_bss_frame_data+0x3c7/0x840 net/wireless/scan.c:3358 ieee80211_bss_info_update+0x791/0xa50 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1065 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] ieee80211_ibss_rx_queued_mgmt+0x1cde/0x2c40 net/mac80211/ibss.c:1573 ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] ieee80211_iface_work+0x78a/0x1010 net/mac80211/iface.c:1823 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:541 process_one_work kernel/workqueue.c:3399 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3482 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3563 kthread+0x38b/0x480 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 Freed by task 38: 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:2748 [inline] slab_free mm/slub.c:6505 [inline] kfree+0x1c5/0x650 mm/slub.c:6798 ieee80211_inform_bss+0xbda/0x10d0 net/mac80211/scan.c:164 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd9c/0x1be0 net/wireless/scan.c:2410 cfg80211_inform_bss_data+0x263/0x3cc0 net/wireless/scan.c:3266 cfg80211_inform_bss_frame_data+0x3c7/0x840 net/wireless/scan.c:3358 ieee80211_bss_info_update+0x791/0xa50 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1065 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] ieee80211_ibss_rx_queued_mgmt+0x1cde/0x2c40 net/mac80211/ibss.c:1573 ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] ieee80211_iface_work+0x78a/0x1010 net/mac80211/iface.c:1823 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:541 process_one_work kernel/workqueue.c:3399 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3482 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3563 kthread+0x38b/0x480 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 The buggy address belongs to the object at ffff888029b97000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 24 bytes inside of freed 1024-byte region [ffff888029b97000, ffff888029b97400) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888029b90000 pfn:0x29b90 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88813ff1adc0 ffff88813ff19888 ffffea000081ce10 raw: ffff888029b90000 000000000010000c 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88813ff1adc0 ffff88813ff19888 ffffea000081ce10 head: ffff888029b90000 000000000010000c 00000000f5000000 0000000000000000 head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5617, tgid 5617 (syz-executor), ts 88050771358 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1853 prep_new_page mm/page_alloc.c:1861 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3925 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5418 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab+0x7d/0x620 mm/slub.c:3462 new_slab mm/slub.c:3513 [inline] refill_objects+0x2d5/0x350 mm/slub.c:7416 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __do_kmalloc_node mm/slub.c:5418 [inline] __kmalloc_node_noprof+0x548/0x720 mm/slub.c:5431 _kmalloc_node_noprof include/linux/slab.h:1200 [inline] qdisc_alloc+0x92/0x9d0 net/sched/sch_generic.c:998 qdisc_create_dflt+0x8e/0x4e0 net/sched/sch_generic.c:1053 attach_one_default_qdisc net/sched/sch_generic.c:1219 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2749 [inline] attach_default_qdiscs net/sched/sch_generic.c:1237 [inline] dev_activate+0x37a/0x1150 net/sched/sch_generic.c:1296 __dev_open+0x699/0x850 net/core/dev.c:1733 __dev_change_flags+0x329/0x820 net/core/dev.c:9812 netif_change_flags+0x7c/0x1b0 net/core/dev.c:9877 do_setlink+0xdd6/0x4670 net/core/rtnetlink.c:3266 rtnl_changelink net/core/rtnetlink.c:3905 [inline] __rtnl_newlink net/core/rtnetlink.c:4076 [inline] rtnl_newlink+0x15a3/0x1c30 net/core/rtnetlink.c:4215 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7132 page last free pid 5351 tgid 5351 ts 52032057469 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1400 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2944 __slab_free+0x274/0x2c0 mm/slub.c:5820 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] __do_kmalloc_node mm/slub.c:5418 [inline] __kmalloc_noprof+0x302/0x710 mm/slub.c:5444 _kmalloc_noprof include/linux/slab.h:995 [inline] tomoyo_add_entry security/tomoyo/common.c:2166 [inline] tomoyo_supervisor+0xc4e/0x1550 security/tomoyo/common.c:2238 tomoyo_audit_path_log security/tomoyo/file.c:169 [inline] tomoyo_path_permission+0x262/0x3b0 security/tomoyo/file.c:592 tomoyo_check_open_permission+0x2b2/0x470 security/tomoyo/file.c:782 security_file_open+0xa9/0x240 security/security.c:2752 do_dentry_open+0x495/0x1360 fs/open.c:977 vfs_open_consume+0x4a/0x350 fs/open.c:1131 do_open fs/namei.c:4913 [inline] path_openat+0x14d7/0x1e40 fs/namei.c:5078 do_file_open+0x23e/0x4a0 fs/namei.c:5107 do_sys_openat2+0x115/0x200 fs/open.c:1452 do_sys_open fs/open.c:1458 [inline] __do_sys_openat fs/open.c:1474 [inline] __se_sys_openat fs/open.c:1469 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1469 Memory state around the buggy address: ffff888029b96f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888029b96f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888029b97000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029b97080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029b97100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================