================================================================== BUG: KASAN: slab-out-of-bounds in cfg80211_wext_freq+0x1f1/0x230 net/wireless/wext-compat.c:235 Read of size 2 at addr ffff88807d6d5540 by task syz-executor.1/5811 CPU: 0 PID: 5811 Comm: syz-executor.1 Not tainted 6.1.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 cfg80211_wext_freq+0x1f1/0x230 net/wireless/wext-compat.c:235 cfg80211_wext_siwscan+0x4ee/0x10c0 net/wireless/scan.c:2751 ioctl_standard_iw_point+0x780/0xca0 net/wireless/wext-core.c:848 ioctl_standard_call+0xc3/0x280 net/wireless/wext-core.c:1033 wext_ioctl_dispatch+0x16f/0x460 net/wireless/wext-core.c:997 wext_handle_ioctl+0x15b/0x260 net/wireless/wext-core.c:1058 sock_ioctl+0x13b/0x770 net/socket.c:1255 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5c1887cea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5c196670c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5c189b4050 RCX: 00007f5c1887cea9 RDX: 0000000020000000 RSI: 0000000000008b18 RDI: 0000000000000007 RBP: 00007f5c188ebff4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5c189b4050 R15: 00007ffc961148f8 Allocated by task 5811: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0xb2/0x230 mm/slab_common.c:968 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:692 [inline] ioctl_standard_iw_point+0x4aa/0xca0 net/wireless/wext-core.c:809 ioctl_standard_call+0xc3/0x280 net/wireless/wext-core.c:1033 wext_ioctl_dispatch+0x16f/0x460 net/wireless/wext-core.c:997 wext_handle_ioctl+0x15b/0x260 net/wireless/wext-core.c:1058 sock_ioctl+0x13b/0x770 net/socket.c:1255 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88807d6d5400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 320 bytes inside of 512-byte region [ffff88807d6d5400, ffff88807d6d5600) The buggy address belongs to the physical page: page:ffffea0001f5b500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d6d4 head:ffffea0001f5b500 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00015b3c00 dead000000000002 ffff888012441c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3632, tgid 3632 (kworker/0:5), ts 72544489632, free_ts 72479166207 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0xa0/0x220 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x135/0x670 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1271 [inline] nlmsg_new include/net/netlink.h:991 [inline] inet6_ifa_notify net/ipv6/addrconf.c:5528 [inline] __ipv6_ifa_notify+0x2db/0x11d0 net/ipv6/addrconf.c:6173 ipv6_ifa_notify net/ipv6/addrconf.c:6225 [inline] addrconf_dad_completed+0x17d/0xcb0 net/ipv6/addrconf.c:4240 addrconf_dad_work+0xd8e/0x16b0 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x137/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1045 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:692 [inline] mca_alloc net/ipv6/mcast.c:880 [inline] __ipv6_dev_mc_inc+0x426/0xa80 net/ipv6/mcast.c:936 addrconf_join_solict net/ipv6/addrconf.c:2197 [inline] addrconf_dad_begin net/ipv6/addrconf.c:4022 [inline] addrconf_dad_work+0x420/0x16b0 net/ipv6/addrconf.c:4147 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88807d6d5400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807d6d5480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807d6d5500: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc ^ ffff88807d6d5580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d6d5600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================