================================================================== BUG: KASAN: use-after-free in rose_get_neigh+0x1a4/0x5ac net/rose/rose_route.c:690 Read of size 1 at addr ffff0000e6baac30 by task syz.7.423/6133 CPU: 0 PID: 6133 Comm: syz.7.423 Not tainted 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 rose_get_neigh+0x1a4/0x5ac net/rose/rose_route.c:690 rose_connect+0x3b4/0xe38 net/rose/af_rose.c:814 __sys_connect_file net/socket.c:1923 [inline] __sys_connect+0x268/0x290 net/socket.c:1940 __do_sys_connect net/socket.c:1950 [inline] __se_sys_connect net/socket.c:1947 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:1947 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4391: 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_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x234/0x448 mm/slub.c:4963 kmalloc_reserve+0xe8/0x270 net/core/skbuff.c:356 pskb_expand_head+0xf8/0x1064 net/core/skbuff.c:1709 netlink_trim+0x160/0x204 net/netlink/af_netlink.c:1293 netlink_broadcast_filtered+0x7c/0xe54 net/netlink/af_netlink.c:1498 netlink_broadcast+0x50/0x68 net/netlink/af_netlink.c:1543 nlmsg_multicast include/net/netlink.h:1033 [inline] genlmsg_multicast_netns include/net/genetlink.h:314 [inline] team_nl_send_multicast+0xc8/0x118 drivers/net/team/team.c:2889 team_nl_send_port_list_get+0x714/0x728 drivers/net/team/team.c:2816 team_nl_send_event_port_get drivers/net/team/team.c:2903 [inline] __team_port_change_send+0x258/0x4dc drivers/net/team/team.c:2961 __team_port_change_check drivers/net/team/team.c:2993 [inline] team_port_change_check+0xa8/0x230 drivers/net/team/team.c:3015 team_device_event+0x398/0x4f4 drivers/net/team/team.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2049 [inline] netdev_state_change+0x184/0x230 net/core/dev.c:1440 linkwatch_do_dev+0x2b0/0x3c8 net/core/link_watch.c:167 __linkwatch_run_queue+0x424/0x730 net/core/link_watch.c:213 linkwatch_event+0x58/0x68 net/core/link_watch.c:252 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Freed by task 4391: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x178/0x410 mm/slub.c:4559 skb_free_head net/core/skbuff.c:655 [inline] skb_release_data+0x404/0x5fc net/core/skbuff.c:677 skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] consume_skb+0x138/0x40c net/core/skbuff.c:914 netlink_broadcast_filtered+0xcb8/0xe54 net/netlink/af_netlink.c:1521 netlink_broadcast+0x50/0x68 net/netlink/af_netlink.c:1543 nlmsg_multicast include/net/netlink.h:1033 [inline] genlmsg_multicast_netns include/net/genetlink.h:314 [inline] team_nl_send_multicast+0xc8/0x118 drivers/net/team/team.c:2889 team_nl_send_port_list_get+0x714/0x728 drivers/net/team/team.c:2816 team_nl_send_event_port_get drivers/net/team/team.c:2903 [inline] __team_port_change_send+0x258/0x4dc drivers/net/team/team.c:2961 __team_port_change_check drivers/net/team/team.c:2993 [inline] team_port_change_check+0xa8/0x230 drivers/net/team/team.c:3015 team_device_event+0x398/0x4f4 drivers/net/team/team.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2049 [inline] netdev_state_change+0x184/0x230 net/core/dev.c:1440 linkwatch_do_dev+0x2b0/0x3c8 net/core/link_watch.c:167 __linkwatch_run_queue+0x424/0x730 net/core/link_watch.c:213 linkwatch_event+0x58/0x68 net/core/link_watch.c:252 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000e6baac00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 48 bytes inside of 512-byte region [ffff0000e6baac00, ffff0000e6baae00) The buggy address belongs to the page: page:00000000e6e28151 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126ba8 head:00000000e6e28151 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 0000000700000001 ffff0000c0002600 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e6baab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e6baab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000e6baac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000e6baac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e6baad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================