R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 ================================================================== 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:1066 [inline] BUG: KASAN: use-after-free in consume_skb+0x2e/0x160 net/core/skbuff.c:907 Read of size 4 at addr ffff88807e26cd5c by task syz-executor679/6534 CPU: 1 PID: 6534 Comm: syz-executor679 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 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:1066 [inline] consume_skb+0x2e/0x160 net/core/skbuff.c:907 __sk_msg_free+0x26d/0x360 net/core/skmsg.c:196 sk_msg_free net/core/skmsg.c:209 [inline] __sk_psock_purge_ingress_msg net/core/skmsg.c:724 [inline] __sk_psock_zap_ingress net/core/skmsg.c:742 [inline] sk_psock_stop+0x415/0x620 net/core/skmsg.c:760 sock_map_close+0x34a/0x780 net/core/sock_map.c:1516 unix_release+0x7a/0xe0 net/unix/af_unix.c:948 __sock_release+0xcd/0x280 net/socket.c:649 sock_close+0x18/0x20 net/socket.c:1314 __fput+0x288/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbae/0x2a30 kernel/exit.c:825 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fcdd1779049 Code: Unable to access opcode bytes at RIP 0x7fcdd177901f. RSP: 002b:00007ffd06871cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fcdd17ed410 RCX: 00007fcdd1779049 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcdd17ed410 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Allocated by task 6534: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x83/0xb0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3214 [inline] kmem_cache_alloc+0x209/0x390 mm/slub.c:3219 skb_clone+0x170/0x3c0 net/core/skbuff.c:1520 sk_psock_verdict_recv+0x72/0x7e0 net/core/skmsg.c:1120 unix_read_sock+0xd7/0x250 net/unix/af_unix.c:2420 sk_psock_verdict_data_ready+0x11a/0x180 net/core/skmsg.c:1163 unix_dgram_sendmsg+0xfa7/0x1950 net/unix/af_unix.c:1941 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x331/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmmsg+0x195/0x470 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 1053: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1700 [inline] slab_free_freelist_hook+0x81/0x190 mm/slub.c:1725 slab_free mm/slub.c:3483 [inline] kmem_cache_free+0x8a/0x5b0 mm/slub.c:3499 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:699 __kfree_skb net/core/skbuff.c:756 [inline] kfree_skb net/core/skbuff.c:773 [inline] kfree_skb+0x140/0x3f0 net/core/skbuff.c:767 sock_drop include/linux/skmsg.h:309 [inline] sk_psock_backlog+0x93b/0xda0 net/core/skmsg.c:644 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff88807e26cc80 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 220 bytes inside of 232-byte region [ffff88807e26cc80, ffff88807e26cd68) The buggy address belongs to the page: page:ffffea0001f89b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e26c flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff8881445f7000 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 6532, ts 57118420627, free_ts 57103748921 create_dummy_stack mm/page_owner.c:59 [inline] register_dummy_stack+0x66/0xb0 mm/page_owner.c:65 init_page_owner mm/page_owner.c:83 [inline] init_page_owner+0x44/0x890 mm/page_owner.c:78 invoke_init_callbacks mm/page_ext.c:108 [inline] page_ext_init+0x4c6/0x4d9 mm/page_ext.c:417 kernel_init_freeable+0x48b/0x73a init/main.c:1612 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3394 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:375 apply_to_pte_range mm/memory.c:2532 [inline] apply_to_pmd_range mm/memory.c:2576 [inline] apply_to_pud_range mm/memory.c:2612 [inline] apply_to_p4d_range mm/memory.c:2648 [inline] __apply_to_page_range+0x694/0x1080 mm/memory.c:2682 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:485 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1704 _vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2107 _vm_unmap_aliases mm/vmalloc.c:2081 [inline] vm_unmap_aliases+0x47/0x50 mm/vmalloc.c:2130 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:890 [inline] bpf_int_jit_compile+0xe36/0x11e0 arch/x86/net/bpf_jit_comp.c:2368 bpf_prog_select_runtime+0x464/0x6a0 kernel/bpf/core.c:1914 bpf_migrate_filter+0x2dc/0x380 net/core/filter.c:1295 bpf_prepare_filter net/core/filter.c:1343 [inline] bpf_prog_create_from_user+0x51b/0x660 net/core/filter.c:1437 seccomp_prepare_filter kernel/seccomp.c:666 [inline] seccomp_prepare_user_filter kernel/seccomp.c:703 [inline] seccomp_set_mode_filter kernel/seccomp.c:1824 [inline] do_seccomp+0x388/0x2890 kernel/seccomp.c:1944 prctl_set_seccomp+0x4a/0x70 kernel/seccomp.c:1997 Memory state around the buggy address: ffff88807e26cc00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ffff88807e26cc80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807e26cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ^ ffff88807e26cd80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff88807e26ce00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================