================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 Read of size 8 at addr ffff88801f8c0298 by task syz-executor.3/12409 CPU: 0 PID: 12409 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller-01459-gc2e6a872bde9 #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: 0033:0x7f930487dea9 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:00007f93055dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f93049abf80 RCX: 00007f930487dea9 RDX: 0000000000000048 RSI: 00000000200009c0 RDI: 0000000000000000 RBP: 00007f93048ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f93049abf80 R15: 00007ffdaaaac298 Allocated by task 23: 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:3966 [inline] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] ieee802_11_parse_elems_full+0xd5/0x2870 net/mac80211/parse.c:880 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2330 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2337 [inline] ieee80211_inform_bss+0x15f/0x1080 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x1049/0x2330 net/wireless/scan.c:2277 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5221 [inline] ieee80211_rx_list+0x2b00/0x3780 net/mac80211/rx.c:5458 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5481 ieee80211_rx include/net/mac80211.h:5093 [inline] ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:781 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 Freed by task 23: 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 ieee80211_inform_bss+0xbb2/0x1080 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x1049/0x2330 net/wireless/scan.c:2277 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5221 [inline] ieee80211_rx_list+0x2b00/0x3780 net/mac80211/rx.c:5458 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5481 ieee80211_rx include/net/mac80211.h:5093 [inline] ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:781 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 The buggy address belongs to the object at ffff88801f8c0000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 664 bytes inside of freed 1024-byte region [ffff88801f8c0000, ffff88801f8c0400) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f8c0 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888015041dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888015041dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea00007e3001 ffffea00007e3048 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 -965126260 (kworker/0:1), ts 8, free_ts 127758215493 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 alloc_skb include/linux/skbuff.h:1308 [inline] nlmsg_new include/net/netlink.h:1015 [inline] inet6_rt_notify+0xdf/0x290 net/ipv6/route.c:6175 fib6_add_rt2node net/ipv6/ip6_fib.c:1262 [inline] fib6_add+0x1e33/0x4430 net/ipv6/ip6_fib.c:1491 __ip6_ins_rt net/ipv6/route.c:1313 [inline] ip6_route_add+0x8b/0x160 net/ipv6/route.c:3855 addrconf_prefix_route net/ipv6/addrconf.c:2485 [inline] addrconf_add_linklocal+0x61a/0xa30 net/ipv6/addrconf.c:3316 addrconf_addr_gen+0x510/0xbb0 addrconf_dev_config net/ipv6/addrconf.c:3491 [inline] addrconf_init_auto_addrs+0x96a/0xeb0 net/ipv6/addrconf.c:3569 addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3742 page last free pid 6695 tgid 6695 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] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x1e2/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x69/0x570 security/security.c:2961 do_dentry_open+0x327/0x15a0 fs/open.c:942 do_open fs/namei.c:3642 [inline] path_openat+0x2860/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406 Memory state around the buggy address: ffff88801f8c0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f8c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801f8c0280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801f8c0300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f8c0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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