================================================================== BUG: KASAN: slab-out-of-bounds in cfg80211_wext_freq+0x170/0x1ac net/wireless/wext-compat.c:235 Read of size 2 at addr ffff0000eb3e8540 by task syz.0.1586/9282 CPU: 1 PID: 9282 Comm: syz.0.1586 Not tainted 6.1.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 __asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349 cfg80211_wext_freq+0x170/0x1ac net/wireless/wext-compat.c:235 cfg80211_wext_siwscan+0x430/0xee8 net/wireless/scan.c:2751 ioctl_standard_iw_point+0x7f0/0xdc4 net/wireless/wext-core.c:848 ioctl_standard_call+0xcc/0x264 net/wireless/wext-core.c:1033 wext_ioctl_dispatch+0x16c/0x3ec net/wireless/wext-core.c:997 wext_handle_ioctl+0x1f8/0x3f4 net/wireless/wext-core.c:1058 sock_ioctl+0x140/0x858 net/socket.c:1255 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 9282: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0xd8/0x1c4 mm/slab_common.c:968 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:692 [inline] ioctl_standard_iw_point+0x3b8/0xdc4 net/wireless/wext-core.c:809 ioctl_standard_call+0xcc/0x264 net/wireless/wext-core.c:1033 wext_ioctl_dispatch+0x16c/0x3ec net/wireless/wext-core.c:997 wext_handle_ioctl+0x1f8/0x3f4 net/wireless/wext-core.c:1058 sock_ioctl+0x140/0x858 net/socket.c:1255 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 kvfree_call_rcu+0xb4/0x714 kernel/rcu/tree.c:3400 drop_sysctl_table+0x274/0x3a0 fs/proc/proc_sysctl.c:1729 drop_sysctl_table+0x284/0x3a0 fs/proc/proc_sysctl.c:1732 unregister_sysctl_table+0x90/0x12c fs/proc/proc_sysctl.c:1767 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x9c net/core/neighbour.c:3866 devinet_sysctl_unregister net/ipv4/devinet.c:2651 [inline] inetdev_destroy net/ipv4/devinet.c:327 [inline] inetdev_event+0x57c/0x1214 net/ipv4/devinet.c:1602 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1970 [inline] call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] unregister_netdevice_many+0xe44/0x175c net/core/dev.c:10882 default_device_exit_batch+0x9f4/0xa70 net/core/dev.c:11395 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x5dc/0x994 net/core/net_namespace.c:604 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 The buggy address belongs to the object at ffff0000eb3e8400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 320 bytes inside of 512-byte region [ffff0000eb3e8400, ffff0000eb3e8600) The buggy address belongs to the physical page: page:00000000408c5f53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b3e8 head:00000000408c5f53 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002600 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000eb3e8400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000eb3e8480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000eb3e8