================================================================== BUG: KASAN: invalid-free in release_gid_table drivers/infiniband/core/cache.c:804 [inline] BUG: KASAN: invalid-free in gid_table_release_one+0x384/0x470 drivers/infiniband/core/cache.c:877 Free of addr ffff8880645c80d8 by task syz.1.2578/7180 CPU: 1 UID: 0 PID: 7180 Comm: syz.1.2578 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report_invalid_free+0xea/0x110 mm/kasan/report.c:557 kasan_kfree_large include/linux/kasan.h:244 [inline] free_large_kmalloc+0x3c/0x110 mm/slub.c:6476 release_gid_table drivers/infiniband/core/cache.c:804 [inline] gid_table_release_one+0x384/0x470 drivers/infiniband/core/cache.c:877 ib_device_release+0xd2/0x1c0 drivers/infiniband/core/device.c:482 device_release+0xc4/0x1f0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x228/0x560 lib/kobject.c:737 rdma_dev_exit_net+0x211/0x350 drivers/infiniband/core/device.c:1155 ops_exit_list net/core/net_namespace.c:199 [inline] ops_undo_list+0x49f/0x940 net/core/net_namespace.c:252 setup_net+0x2f0/0x340 net/core/net_namespace.c:462 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:581 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:132 unshare_nsproxy_namespaces+0x149/0x190 kernel/nsproxy.c:234 ksys_unshare+0x582/0x9e0 kernel/fork.c:3242 __do_sys_unshare kernel/fork.c:3316 [inline] __se_sys_unshare kernel/fork.c:3314 [inline] __x64_sys_unshare+0x38/0x50 kernel/fork.c:3314 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcc92d9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc93c43028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fcc93015fa0 RCX: 00007fcc92d9c819 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000 RBP: 00007fcc92e32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcc93016038 R14: 00007fcc93015fa0 R15: 00007ffde62a9e78 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880645c8000 pfn:0x645c8 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f8(unknown) raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 raw: ffff8880645c8000 0000000000000000 00000000f8000000 0000000000000000 head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 head: ffff8880645c8000 0000000000000000 00000000f8000000 0000000000000000 head: 00fff00000000002 ffffffffffffff01 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 0x40dc0(GFP_KERNEL|__GFP_ZERO|__GFP_COMP), pid 5788, tgid 5784 (syz.2.2487), ts 1025961020046, free_ts 1004738860532 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 ___kmalloc_large_node+0x4e/0x120 mm/slub.c:5233 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5264 __do_kmalloc_node mm/slub.c:5280 [inline] __kmalloc_noprof+0x3e8/0x760 mm/slub.c:5304 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] alloc_gid_table drivers/infiniband/core/cache.c:773 [inline] _gid_table_setup_one drivers/infiniband/core/cache.c:888 [inline] gid_table_setup_one drivers/infiniband/core/cache.c:916 [inline] ib_cache_setup_one+0x198/0x570 drivers/infiniband/core/cache.c:1606 ib_register_device+0xfbd/0x13e0 drivers/infiniband/core/device.c:1426 rxe_register_device+0x1e3/0x350 drivers/infiniband/sw/rxe/rxe_verbs.c:1552 rxe_net_add+0x81/0x110 drivers/infiniband/sw/rxe/rxe_net.c:625 rxe_newlink+0xf4/0x1c0 drivers/infiniband/sw/rxe/rxe.c:243 nldev_newlink+0x5bc/0x650 drivers/infiniband/core/nldev.c:1812 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+0x6d1/0xa10 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 page last free pid 9196 tgid 9196 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 vfree+0x1d1/0x2f0 mm/vmalloc.c:3472 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff8880645c7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880645c8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880645c8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880645c8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880645c8180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================