================================================================== BUG: KASAN: slab-out-of-bounds in cfg80211_wext_freq+0x1f1/0x230 net/wireless/wext-compat.c:235 Read of size 2 at addr ffff888042941140 by task syz-executor.0/21808 CPU: 0 PID: 21808 Comm: syz-executor.0 Not tainted 6.1.94-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: 0033:0x7f4b3ea7d0a9 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:00007f4b3f7810c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f4b3ebb3f80 RCX: 00007f4b3ea7d0a9 RDX: 0000000020000000 RSI: 0000000000008b18 RDI: 0000000000000003 RBP: 00007f4b3eaec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4b3ebb3f80 R15: 00007fff40c6f838 Allocated by task 21808: 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 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 insert_work+0x54/0x3d0 kernel/workqueue.c:1361 __queue_work+0xb4b/0xf90 kernel/workqueue.c:1520 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1544 [inline] __run_timers+0x6a8/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 __do_softirq kernel/softirq.c:605 [inline] invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 The buggy address belongs to the object at ffff888042941000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 320 bytes inside of 512-byte region [ffff888042941000, ffff888042941200) The buggy address belongs to the physical page: page:ffffea00010a5000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42940 head:ffffea00010a5000 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea000154cb00 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 0, tgid 0 (swapper/1), ts 711159115122, free_ts 707761398964 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 skb_copy+0x127/0x820 net/core/skbuff.c:1732 mac80211_hwsim_tx_frame_no_nl+0x10f4/0x1a70 drivers/net/wireless/mac80211_hwsim.c:1724 mac80211_hwsim_tx_frame+0x1cc/0x220 drivers/net/wireless/mac80211_hwsim.c:2053 mac80211_hwsim_beacon_tx+0x5f8/0xaa0 drivers/net/wireless/mac80211_hwsim.c:2116 __iterate_interfaces+0x21e/0x4b0 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd4/0x170 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xd0/0x1e0 drivers/net/wireless/mac80211_hwsim.c:2142 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 kasan_depopulate_vmalloc_pte+0x66/0x80 mm/kasan/shadow.c:375 apply_to_pte_range mm/memory.c:2645 [inline] apply_to_pmd_range mm/memory.c:2689 [inline] apply_to_pud_range mm/memory.c:2725 [inline] apply_to_p4d_range mm/memory.c:2761 [inline] __apply_to_page_range+0x9c5/0xcc0 mm/memory.c:2795 kasan_release_vmalloc+0x96/0xb0 mm/kasan/shadow.c:492 __purge_vmap_area_lazy+0x157c/0x1720 mm/vmalloc.c:1774 _vm_unmap_aliases+0x476/0x4e0 mm/vmalloc.c:2177 change_page_attr_set_clr+0x304/0xe70 arch/x86/mm/pat/set_memory.c:1821 cpa_set_pages_array arch/x86/mm/pat/set_memory.c:1885 [inline] _set_pages_array+0x10b/0x200 arch/x86/mm/pat/set_memory.c:2216 drm_gem_shmem_get_pages_locked drivers/gpu/drm/drm_gem_shmem_helper.c:188 [inline] drm_gem_shmem_get_pages+0x16c/0x210 drivers/gpu/drm/drm_gem_shmem_helper.c:215 dma_buf_dynamic_attach+0x1f9/0x950 drivers/dma-buf/dma-buf.c:851 drm_gem_prime_import_dev+0x104/0x310 drivers/gpu/drm/drm_prime.c:937 drm_gem_prime_import drivers/gpu/drm/drm_prime.c:986 [inline] drm_gem_prime_fd_to_handle+0x1d1/0x450 drivers/gpu/drm/drm_prime.c:324 drm_ioctl_kernel+0x345/0x4f0 drivers/gpu/drm/drm_ioctl.c:788 drm_ioctl+0x618/0x9f0 drivers/gpu/drm/drm_ioctl.c:891 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 Memory state around the buggy address: ffff888042941000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888042941080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888042941100: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc ^ ffff888042941180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888042941200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================