================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 Read of size 8 at addr ffff88805d881298 by task syz-executor.4/10158 CPU: 1 PID: 10158 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-01473-g2506f6229bd0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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 lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 htab_map_alloc+0x9b/0xe60 kernel/bpf/hashtab.c:506 map_create+0x90c/0x1200 kernel/bpf/syscall.c:1333 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5659 __do_sys_bpf kernel/bpf/syscall.c:5784 [inline] __se_sys_bpf kernel/bpf/syscall.c:5782 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5782 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5aa467dea9 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:00007f5aa54260c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f5aa47ac050 RCX: 00007f5aa467dea9 RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0100000000000000 RBP: 00007f5aa46ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5aa47ac050 R15: 00007fff1d04c938 Allocated by task 9386: 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] kmalloc_trace+0x1db/0x360 mm/slub.c:3997 kmalloc include/linux/slab.h:628 [inline] kzalloc include/linux/slab.h:749 [inline] copy_verifier_state+0xab8/0x1020 kernel/bpf/verifier.c:1453 push_stack+0x1a7/0x4e0 kernel/bpf/verifier.c:1721 check_cond_jmp_op+0x1fea/0x3d80 kernel/bpf/verifier.c:15226 do_check+0x9bcf/0x10930 kernel/bpf/verifier.c:18077 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:20806 do_check_main kernel/bpf/verifier.c:20897 [inline] bpf_check+0x139c0/0x18a90 kernel/bpf/verifier.c:21567 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2908 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5677 __do_sys_bpf kernel/bpf/syscall.c:5784 [inline] __se_sys_bpf kernel/bpf/syscall.c:5782 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5782 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9386: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x153/0x3a0 mm/slub.c:4390 free_func_state kernel/bpf/verifier.c:1376 [inline] free_verifier_state+0xde/0x240 kernel/bpf/verifier.c:1392 pop_stack kernel/bpf/verifier.c:1696 [inline] do_check+0x9126/0x10930 kernel/bpf/verifier.c:18066 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:20806 do_check_main kernel/bpf/verifier.c:20897 [inline] bpf_check+0x139c0/0x18a90 kernel/bpf/verifier.c:21567 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2908 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5677 __do_sys_bpf kernel/bpf/syscall.c:5784 [inline] __se_sys_bpf kernel/bpf/syscall.c:5782 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5782 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805d881000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 664 bytes inside of freed 2048-byte region [ffff88805d881000, ffff88805d881800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805d884000 pfn:0x5d880 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000a40(workingset|slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000a40 ffff888015042000 ffffea0000a67610 ffffea0000a82c10 raw: ffff88805d884000 0000000000080004 00000001ffffffff 0000000000000000 head: 00fff80000000a40 ffff888015042000 ffffea0000a67610 ffffea0000a82c10 head: ffff88805d884000 0000000000080004 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea0001762001 dead000000000122 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8, tgid -80050234 (kworker/0:1), ts 8, free_ts 111565935726 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc_node_track_caller+0x2d6/0x4e0 mm/slub.c:3986 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 skb_copy+0xef/0x770 net/core/skbuff.c:2081 mac80211_hwsim_tx_frame_no_nl+0x1068/0x18d0 drivers/net/wireless/virtual/mac80211_hwsim.c:1857 mac80211_hwsim_tx+0x1837/0x23c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2075 drv_tx net/mac80211/driver-ops.h:37 [inline] wake_tx_push_queue net/mac80211/util.c:298 [inline] ieee80211_handle_wake_tx_queue+0x1ae/0x2d0 net/mac80211/util.c:315 drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] ieee80211_queue_skb+0x1aea/0x24c0 net/mac80211/tx.c:1664 ieee80211_tx+0x2c4/0x470 net/mac80211/tx.c:1966 __ieee80211_subif_start_xmit+0xe91/0x1600 net/mac80211/tx.c:4338 page last free pid 5091 tgid 5072 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 discard_slab mm/slub.c:2437 [inline] __put_partials+0xeb/0x130 mm/slub.c:2906 put_cpu_partial+0x17c/0x250 mm/slub.c:2981 __slab_free+0x2ea/0x3d0 mm/slub.c:4151 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_node+0x194/0x380 mm/slub.c:3888 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:656 alloc_skb_fclone include/linux/skbuff.h:1358 [inline] tcp_stream_alloc_skb+0x3d/0x310 net/ipv4/tcp.c:879 tcp_sendmsg_locked+0xd5f/0x4d70 net/ipv4/tcp.c:1161 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1348 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2110 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa84/0xcb0 fs/read_write.c:590 Memory state around the buggy address: ffff88805d881180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805d881200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805d881280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805d881300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805d881380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================