================================================================== BUG: KASAN: slab-use-after-free in rose_get_neigh+0x391/0x990 net/rose/rose_route.c:692 Read of size 1 at addr ffff88805839f030 by task syz.2.2441/14975 CPU: 1 UID: 0 PID: 14975 Comm: syz.2.2441 Not tainted 6.16.0-rc3-syzkaller-00117-g8550821a1535 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 rose_get_neigh+0x391/0x990 net/rose/rose_route.c:692 rose_connect+0x416/0x10a0 net/rose/af_rose.c:816 __sys_connect_file net/socket.c:2038 [inline] __sys_connect+0x313/0x440 net/socket.c:2057 __do_sys_connect net/socket.c:2063 [inline] __se_sys_connect net/socket.c:2060 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2060 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe0ae78e929 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:00007fe0af662038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fe0ae9b5fa0 RCX: 00007fe0ae78e929 RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000009 RBP: 00007fe0ae810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe0ae9b5fa0 R15: 00007fffe6486b38 Allocated by task 14862: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359 kmalloc_noprof include/linux/slab.h:905 [inline] alloc_work_entries+0xc0/0x360 drivers/infiniband/core/iwcm.c:175 iw_cm_listen+0x42/0x230 drivers/infiniband/core/iwcm.c:575 cma_iw_listen drivers/infiniband/core/cma.c:2687 [inline] rdma_listen+0xa53/0xd30 drivers/infiniband/core/cma.c:3972 cma_listen_on_dev+0x3f5/0x720 drivers/infiniband/core/cma.c:2746 cma_add_one+0x647/0xa50 drivers/infiniband/core/cma.c:5376 add_client_context+0x36a/0x790 drivers/infiniband/core/device.c:720 enable_device_and_get+0x19b/0x3d0 drivers/infiniband/core/device.c:1331 ib_register_device+0x10c3/0x1380 drivers/infiniband/core/device.c:1450 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink+0x903/0xd70 drivers/infiniband/sw/siw/siw_main.c:430 nldev_newlink+0x4a2/0x5a0 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6ae/0x980 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 14862: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x18e/0x440 mm/slub.c:4842 dealloc_work_entries drivers/infiniband/core/iwcm.c:165 [inline] free_cm_id drivers/infiniband/core/iwcm.c:205 [inline] iwcm_deref_id+0x1c7/0x250 drivers/infiniband/core/iwcm.c:217 _destroy_id+0x7f8/0xff0 drivers/infiniband/core/cma.c:2063 cma_send_device_removal_put drivers/infiniband/core/cma.c:5277 [inline] cma_process_remove+0x64c/0xbf0 drivers/infiniband/core/cma.c:5302 cma_add_one+0x7d6/0xa50 drivers/infiniband/core/cma.c:5390 add_client_context+0x36a/0x790 drivers/infiniband/core/device.c:720 enable_device_and_get+0x19b/0x3d0 drivers/infiniband/core/device.c:1331 ib_register_device+0x10c3/0x1380 drivers/infiniband/core/device.c:1450 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink+0x903/0xd70 drivers/infiniband/sw/siw/siw_main.c:430 nldev_newlink+0x4a2/0x5a0 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6ae/0x980 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805839f000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 48 bytes inside of freed 512-byte region [ffff88805839f000, ffff88805839f200) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805839d800 pfn:0x5839c head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88801a441c80 ffffea00015dd910 ffffea000160ab10 raw: ffff88805839d800 000000000010000e 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88801a441c80 ffffea00015dd910 ffffea000160ab10 head: ffff88805839d800 000000000010000e 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffea000160e701 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5831, tgid 5831 (syz-executor), ts 74257355550, free_ts 20552445760 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_noprof+0x305/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] fib6_info_alloc+0x30/0xf0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x142/0x860 net/ipv6/route.c:3811 addrconf_f6i_alloc+0x1d2/0x450 net/ipv6/route.c:4679 ipv6_add_addr+0x56e/0x1090 net/ipv6/addrconf.c:1121 inet6_addr_add+0x387/0xc00 net/ipv6/addrconf.c:3049 inet6_rtm_newaddr+0x93d/0xd20 net/ipv6/addrconf.c:5063 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 __free_pages mm/page_alloc.c:5071 [inline] free_contig_range+0x1bd/0x4a0 mm/page_alloc.c:6927 destroy_args+0x7e/0x5d0 mm/debug_vm_pgtable.c:1009 debug_vm_pgtable+0x412/0x450 mm/debug_vm_pgtable.c:1389 do_one_initcall+0x233/0x820 init/main.c:1274 do_initcall_level+0x137/0x1f0 init/main.c:1336 do_initcalls+0x69/0xd0 init/main.c:1352 kernel_init_freeable+0x3d9/0x570 init/main.c:1584 kernel_init+0x1d/0x1d0 init/main.c:1474 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff88805839ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805839ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805839f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805839f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805839f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================