================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline] BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:1107 [inline] BUG: KASAN: use-after-free in consume_skb+0x35/0x140 net/core/skbuff.c:910 Read of size 4 at addr ffff88807434099c by task kworker/0:7/3623 CPU: 0 PID: 3623 Comm: kworker/0:7 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events sk_psock_destroy Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] refcount_read include/linux/refcount.h:147 [inline] skb_unref include/linux/skbuff.h:1107 [inline] consume_skb+0x35/0x140 net/core/skbuff.c:910 __sk_msg_free+0x2cd/0x350 net/core/skmsg.c:205 sk_msg_free net/core/skmsg.c:218 [inline] __sk_psock_purge_ingress_msg net/core/skmsg.c:764 [inline] __sk_psock_zap_ingress net/core/skmsg.c:777 [inline] sk_psock_destroy+0x3ab/0x870 net/core/skmsg.c:809 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 4382: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 skb_clone+0x1bb/0x350 net/core/skbuff.c:1523 sk_psock_verdict_recv+0x51/0x5b0 net/core/skmsg.c:1176 unix_read_sock+0x124/0x360 net/unix/af_unix.c:2428 sk_psock_verdict_data_ready+0x147/0x1a0 net/core/skmsg.c:1219 unix_dgram_sendmsg+0x15fc/0x2090 net/unix/af_unix.c:1942 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485 __sys_sendmsg net/socket.c:2514 [inline] __do_sys_sendmsg net/socket.c:2523 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 3623: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x91/0x1f0 mm/slub.c:3515 kfree_skb include/linux/skbuff.h:1123 [inline] sock_drop include/linux/skmsg.h:313 [inline] __sk_psock_zap_ingress net/core/skmsg.c:775 [inline] sk_psock_destroy+0x1a8/0x870 net/core/skmsg.c:809 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff8880743408c0 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 220 bytes inside of 232-byte region [ffff8880743408c0, ffff8880743409a8) The buggy address belongs to the page: page:ffffea0001d0d000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74340 memcg:ffff88801d52e281 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888016997500 raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff88801d52e281 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 4143, ts 89546792613, free_ts 89487398440 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5423 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233 skb_clone+0x1bb/0x350 net/core/skbuff.c:1523 __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline] __netlink_deliver_tap+0x375/0x760 net/netlink/af_netlink.c:323 netlink_deliver_tap+0x16c/0x180 net/netlink/af_netlink.c:336 __netlink_sendskb net/netlink/af_netlink.c:1270 [inline] netlink_sendskb+0x5c/0x120 net/netlink/af_netlink.c:1279 netlink_unicast+0x3a1/0x980 net/netlink/af_netlink.c:1367 nlmsg_unicast include/net/netlink.h:1050 [inline] netlink_ack+0x834/0xb10 net/netlink/af_netlink.c:2474 netlink_rcv_skb+0x24c/0x410 net/netlink/af_netlink.c:2510 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline] netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1352 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1920 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x564/0x720 net/socket.c:2058 __do_sys_sendto net/socket.c:2070 [inline] __se_sys_sendto net/socket.c:2066 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2066 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc_trace+0xfb/0x290 mm/slub.c:3245 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] kset_create lib/kobject.c:982 [inline] kset_create_and_add+0x57/0x160 lib/kobject.c:1025 register_queue_kobjects net/core/net-sysfs.c:1759 [inline] netdev_register_kobject+0x1a0/0x310 net/core/net-sysfs.c:2018 register_netdevice+0x108c/0x1720 net/core/dev.c:10357 cfg80211_register_netdevice+0x14e/0x2e0 net/wireless/core.c:1356 ieee80211_if_add+0xfc3/0x1e50 net/mac80211/iface.c:2060 ieee80211_register_hw+0x2aa9/0x39d0 net/mac80211/main.c:1321 Memory state around the buggy address: ffff888074340880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff888074340900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888074340980: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ^ ffff888074340a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888074340a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc 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