================================================================== BUG: KASAN: slab-out-of-bounds in is_tcf_tunnel_set include/net/tc_act/tc_tunnel_key.h:33 [inline] BUG: KASAN: slab-out-of-bounds in tc_setup_flow_action+0xbb8/0x3630 net/sched/cls_api.c:3639 Read of size 8 at addr ffff88812d11bcc0 by task syz.2.7989/30596 CPU: 1 PID: 30596 Comm: syz.2.7989 Tainted: G W 5.10.233-syzkaller-00881-gfbe98d68b6b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 is_tcf_tunnel_set include/net/tc_act/tc_tunnel_key.h:33 [inline] tc_setup_flow_action+0xbb8/0x3630 net/sched/cls_api.c:3639 mall_replace_hw_filter+0x394/0xc10 net/sched/cls_matchall.c:100 mall_change+0x573/0x7a0 net/sched/cls_matchall.c:236 tc_new_tfilter+0x168e/0x1dc0 net/sched/cls_api.c:2134 rtnetlink_rcv_msg+0x77a/0xc50 net/core/rtnetlink.c:5598 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5625 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1333 netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg+0x1b1/0x280 net/socket.c:2466 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2466 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff170e5ad29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff16f4cc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff17104afa0 RCX: 00007ff170e5ad29 RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004 RBP: 00007ff170ed6b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff17104afa0 R15: 00007ffd99934698 Allocated by task 30596: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x1aa/0x330 mm/slub.c:4033 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:664 [inline] tcf_idr_create+0x5f/0x770 net/sched/act_api.c:430 tcf_idr_create_from_flags+0x5f/0x70 net/sched/act_api.c:488 tcf_gact_init+0x373/0x6e0 net/sched/act_gact.c:102 tcf_action_init_1+0x584/0x830 net/sched/act_api.c:1052 tcf_action_init+0x2b5/0x800 net/sched/act_api.c:1109 tcf_exts_validate+0x232/0x540 net/sched/cls_api.c:3086 mall_set_parms+0x4b/0x440 net/sched/cls_matchall.c:171 mall_change+0x49e/0x7a0 net/sched/cls_matchall.c:230 tc_new_tfilter+0x168e/0x1dc0 net/sched/cls_api.c:2134 rtnetlink_rcv_msg+0x77a/0xc50 net/core/rtnetlink.c:5598 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5625 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1333 netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg+0x1b1/0x280 net/socket.c:2466 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2466 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88812d11bc00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88812d11bc00, ffff88812d11bcc0) The buggy address belongs to the page: page:ffffea0004b446c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d11b flags: 0x4000000000000200(slab) raw: 4000000000000200 ffffea00043b85c0 0000000600000006 ffff888100043380 raw: 0000000000000000 0000000080100010 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 28369, ts 1300670983587, free_ts 1299971479095 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc+0x204/0x330 mm/slub.c:4029 kmalloc include/linux/slab.h:557 [inline] copy_verifier_state+0xc3/0xbf0 kernel/bpf/verifier.c:891 push_stack+0x19d/0x4f0 kernel/bpf/verifier.c:989 check_cond_jmp_op kernel/bpf/verifier.c:8286 [inline] do_check+0xc645/0xe8c0 kernel/bpf/verifier.c:10313 do_check_common+0x946/0x1370 kernel/bpf/verifier.c:12047 do_check_main kernel/bpf/verifier.c:12110 [inline] bpf_check+0xb551/0xf230 kernel/bpf/verifier.c:12665 bpf_prog_load kernel/bpf/syscall.c:2239 [inline] __do_sys_bpf kernel/bpf/syscall.c:4440 [inline] __se_sys_bpf+0x107a2/0x11cb0 kernel/bpf/syscall.c:4396 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4396 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] free_pcp_prepare mm/page_alloc.c:1421 [inline] free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443 release_pages+0xea0/0xef0 mm/swap.c:1103 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:356 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:326 exit_mmap+0x306/0x560 mm/mmap.c:3375 __mmput+0x95/0x2d0 kernel/fork.c:1153 mmput+0x59/0x170 kernel/fork.c:1176 exit_mm kernel/exit.c:539 [inline] do_exit+0xbda/0x2a50 kernel/exit.c:850 do_group_exit+0x141/0x310 kernel/exit.c:985 __do_sys_exit_group kernel/exit.c:996 [inline] __se_sys_exit_group kernel/exit.c:994 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:994 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88812d11bb80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812d11bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812d11bc80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88812d11bd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812d11bd80: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================