================================================================== 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+0x58/0x70 kernel/locking/spinlock.c:189 Read of size 1 at addr ffff0000c8ef8018 by task syz.6.736/8506 CPU: 1 UID: 0 PID: 8506 Comm: syz.6.736 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 dump_backtrace(regs = 0000000000000000 tsk = 0000000000000000) Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xb0/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 __kasan_check_byte+0x3c/0x54 mm/kasan/common.c:585 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0xa4/0x320 kernel/locking/lockdep.c:5916 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:165 [inline] _raw_spin_lock_irq+0x58/0x70 kernel/locking/spinlock.c:189 spin_lock_irq include/linux/spinlock.h:377 [inline] gadget_dev_open+0x50/0x1c4 drivers/usb/gadget/legacy/inode.c:1929 do_dentry_open+0x5c4/0xfbc fs/open.c:996 vfs_open+0x44/0x2dc fs/open.c:1101 do_open fs/namei.c:4866 [inline] path_openat+0x1084/0x18f0 fs/namei.c:5029 do_file_open+0x1c8/0x2e8 fs/namei.c:5058 do_sys_openat2+0x114/0x1e8 fs/open.c:1417 do_sys_open+0xb0/0xe0 fs/open.c:1423 __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __arm64_sys_openat+0xa8/0xc4 fs/open.c:1434 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Allocated by task 0: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_noprof+0x34c/0x6c8 mm/slub.c:5439 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ieee802_11_parse_elems_full+0x114/0x2208 net/mac80211/parse.c:1071 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2548 [inline] ieee80211_inform_bss+0x114/0xd70 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xac4/0x17a0 net/wireless/scan.c:2446 cfg80211_inform_bss_data+0x1ec/0x2d04 net/wireless/scan.c:3302 cfg80211_inform_bss_frame_data+0x348/0x714 net/wireless/scan.c:3394 ieee80211_bss_info_update+0x5d0/0x944 net/mac80211/scan.c:230 ieee80211_scan_rx+0x450/0x928 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5433 [inline] ieee80211_rx_list+0x229c/0x3000 net/mac80211/rx.c:5726 ieee80211_rx_napi+0x18c/0x370 net/mac80211/rx.c:5749 ieee80211_rx include/net/mac80211.h:5449 [inline] ieee80211_handle_queued_frames+0xc8/0x17c net/mac80211/main.c:452 ieee80211_tasklet_handler+0x20/0x30 net/mac80211/main.c:471 tasklet_action_common+0x1dc/0x278 kernel/softirq.c:-1 tasklet_action+0x68/0x8c kernel/softirq.c:989 handle_softirqs+0x324/0xcbc kernel/softirq.c:645 __do_softirq+0x14/0x20 kernel/softirq.c:679 Freed by task 0: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x74/0xa4 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6509 [inline] kfree+0x188/0x658 mm/slub.c:6802 ieee80211_inform_bss+0x914/0xd70 net/mac80211/scan.c:164 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xac4/0x17a0 net/wireless/scan.c:2446 cfg80211_inform_bss_data+0x1ec/0x2d04 net/wireless/scan.c:3302 cfg80211_inform_bss_frame_data+0x348/0x714 net/wireless/scan.c:3394 ieee80211_bss_info_update+0x5d0/0x944 net/mac80211/scan.c:230 ieee80211_scan_rx+0x450/0x928 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5433 [inline] ieee80211_rx_list+0x229c/0x3000 net/mac80211/rx.c:5726 ieee80211_rx_napi+0x18c/0x370 net/mac80211/rx.c:5749 ieee80211_rx include/net/mac80211.h:5449 [inline] ieee80211_handle_queued_frames+0xc8/0x17c net/mac80211/main.c:452 ieee80211_tasklet_handler+0x20/0x30 net/mac80211/main.c:471 tasklet_action_common+0x1dc/0x278 kernel/softirq.c:-1 tasklet_action+0x68/0x8c kernel/softirq.c:989 handle_softirqs+0x324/0xcbc kernel/softirq.c:645 __do_softirq+0x14/0x20 kernel/softirq.c:679 The buggy address belongs to the object at ffff0000c8ef8000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 24 bytes inside of freed 1024-byte region [ffff0000c8ef8000, ffff0000c8ef8400) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108ef8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0001dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0001dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc323be01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c8ef7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c8ef7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000c8ef8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c8ef8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c8ef8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in kernel/locking/qspinlock.h:68:9 index 13965 is out of range for type 'unsigned long[8]' CPU: 1 UID: 0 PID: 8506 Comm: syz.6.736 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 dump_backtrace(regs = 0000000000000000 tsk = 0000000000000000) Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 ubsan_epilogue+0x14/0x48 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xd0/0xf8 lib/ubsan.c:455 decode_tail kernel/locking/qspinlock.h:68 [inline] queued_spin_lock_slowpath+0x834/0xb5c kernel/locking/qspinlock.c:307 queued_spin_lock include/asm-generic/qspinlock.h:115 [inline] do_raw_spin_lock+0x21c/0x2d0 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:166 [inline] _raw_spin_lock_irq+0x60/0x70 kernel/locking/spinlock.c:189 spin_lock_irq include/linux/spinlock.h:377 [inline] gadget_dev_open+0x50/0x1c4 drivers/usb/gadget/legacy/inode.c:1929 do_dentry_open+0x5c4/0xfbc fs/open.c:996 vfs_open+0x44/0x2dc fs/open.c:1101 do_open fs/namei.c:4866 [inline] path_openat+0x1084/0x18f0 fs/namei.c:5029 do_file_open+0x1c8/0x2e8 fs/namei.c:5058 do_sys_openat2+0x114/0x1e8 fs/open.c:1417 do_sys_open+0xb0/0xe0 fs/open.c:1423 __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __arm64_sys_openat+0xa8/0xc4 fs/open.c:1434 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 ---[ end trace ]--- Unable to handle kernel paging request at virtual address ffff5000296d5cee KASAN: maybe wild-memory-access in range [0xfffe80014b6ae770-0xfffe80014b6ae777] Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000002196b3000 [ffff5000296d5cee] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 8506 Comm: syz.6.736 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x52c/0xb5c kernel/locking/qspinlock.c:310 lr : decode_tail kernel/locking/qspinlock.h:68 [inline] lr : queued_spin_lock_slowpath+0x834/0xb5c kernel/locking/qspinlock.c:307 sp : ffff8000996c7620 x29: ffff8000996c76c0 x28: 1fffe000349fea28 x27: 1fffe00018e193b2 x26: ffff0001a4ff5148 x25: fffe80014b6ae770 x24: dfff800000000000 x23: ffff7000132d8ec8 x22: 1fffe000191df000 x21: ffff0001a4ff5140 x20: ffff0000c70c9d90 x19: ffff0000c8ef8000 x18: 0000000000000000 x17: 363a682e6b636f6c x16: 0000000000000001 x15: 0000000000000000 x14: 00000000000db7cd x13: 0000000000000001 x12: 0000000000000004 x11: ffff7000115f8468 x10: ffff800089769140 x9 : ffff800089769170 x8 : 1fffd000296d5cee x7 : 00000000030b5368 x6 : ffff800080483084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f31d4 x2 : 0000000000000002 x1 : ffff0000c70c9d80 x0 : 0000000000000001 dump_backtrace(regs = 0000000073ec4975 tsk = 0000000000000000) Call trace: queued_spin_lock_slowpath+0x52c/0xb5c kernel/locking/qspinlock.c:310 (P) queued_spin_lock include/asm-generic/qspinlock.h:115 [inline] do_raw_spin_lock+0x21c/0x2d0 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:166 [inline] _raw_spin_lock_irq+0x60/0x70 kernel/locking/spinlock.c:189 spin_lock_irq include/linux/spinlock.h:377 [inline] gadget_dev_open+0x50/0x1c4 drivers/usb/gadget/legacy/inode.c:1929 do_dentry_open+0x5c4/0xfbc fs/open.c:996 vfs_open+0x44/0x2dc fs/open.c:1101 do_open fs/namei.c:4866 [inline] path_openat+0x1084/0x18f0 fs/namei.c:5029 do_file_open+0x1c8/0x2e8 fs/namei.c:5058 do_sys_openat2+0x114/0x1e8 fs/open.c:1417 do_sys_open+0xb0/0xe0 fs/open.c:1423 __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __arm64_sys_openat+0xa8/0xc4 fs/open.c:1434 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Code: f94007e9 f9400328 8b090119 d343ff28 (38786908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f94007e9 ldr x9, [sp, #8] 4: f9400328 ldr x8, [x25] 8: 8b090119 add x25, x8, x9 c: d343ff28 lsr x8, x25, #3 * 10: 38786908 ldrb w8, [x8, x24] <-- trapping instruction