warning: `syz-executor.3' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211 ================================================================== BUG: KASAN: slab-out-of-bounds in cfg80211_wext_freq+0x1f9/0x240 net/wireless/wext-compat.c:238 Read of size 2 at addr ffff888061070d40 by task syz-executor.3/5829 CPU: 1 PID: 5829 Comm: syz-executor.3 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:91 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 cfg80211_wext_freq+0x1f9/0x240 net/wireless/wext-compat.c:238 cfg80211_wext_siwscan+0x4fd/0x10d0 net/wireless/scan.c:3463 ioctl_standard_iw_point+0x788/0xcb0 net/wireless/wext-core.c:867 ioctl_standard_call+0xc7/0x290 net/wireless/wext-core.c:1052 wext_ioctl_dispatch+0x58e/0x640 net/wireless/wext-core.c:1016 wext_handle_ioctl+0x15f/0x270 net/wireless/wext-core.c:1077 sock_ioctl+0x17f/0x8e0 net/socket.c:1275 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f890d07cf69 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:00007f890ddf90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f890d1b3f80 RCX: 00007f890d07cf69 RDX: 0000000020000000 RSI: 0000000000008b18 RDI: 0000000000000004 RBP: 00007f890d0da6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f890d1b3f80 R15: 00007ffe16d876c8 Allocated by task 5829: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4122 [inline] __kmalloc_noprof+0x1f9/0x400 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] ioctl_standard_iw_point+0x4ae/0xcb0 net/wireless/wext-core.c:828 ioctl_standard_call+0xc7/0x290 net/wireless/wext-core.c:1052 wext_ioctl_dispatch+0x58e/0x640 net/wireless/wext-core.c:1016 wext_handle_ioctl+0x15f/0x270 net/wireless/wext-core.c:1077 sock_ioctl+0x17f/0x8e0 net/socket.c:1275 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888061070c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of allocated 316-byte region [ffff888061070c00, ffff888061070d3c) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61070 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015041c80 ffffea0001ee6f00 0000000000000002 raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015041c80 ffffea0001ee6f00 0000000000000002 head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000002 ffffea0001841c01 ffffffffffffffff 0000000000000000 head: ffff888000000004 0000000000000000 00000000ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2443, tgid 2443 (kworker/u8:10), ts 119082989279, free_ts 118726412667 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1470 prep_new_page mm/page_alloc.c:1478 [inline] get_page_from_freelist+0x2cbd/0x2d70 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4715 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4148 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] mld_add_delrec net/ipv6/mcast.c:742 [inline] igmp6_leave_group net/ipv6/mcast.c:2624 [inline] igmp6_group_dropped+0x3a6/0xef0 net/ipv6/mcast.c:722 __ipv6_dev_mc_dec+0x2bd/0x340 net/ipv6/mcast.c:978 addrconf_leave_solict net/ipv6/addrconf.c:2252 [inline] __ipv6_ifa_notify+0x912/0x11f0 net/ipv6/addrconf.c:6283 addrconf_ifdown+0xeea/0x1bc0 net/ipv6/addrconf.c:3979 addrconf_notify+0x3cb/0x1020 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1585 unregister_netdevice_many_notify+0x544/0x16b0 net/core/dev.c:11194 page last free pid 5115 tgid 5115 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1089 [inline] free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2669 folios_put_refs+0x76e/0x860 mm/swap.c:1020 folio_batch_release include/linux/pagevec.h:101 [inline] mapping_try_invalidate+0x4d4/0x620 mm/truncate.c:527 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1676 xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2045 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888061070c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888061070c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888061070d00: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc ^ ffff888061070d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888061070e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================