gretap0 speed is unknown, defaulting to 1000 ================================================================== BUG: KASAN: slab-use-after-free in siw_query_port+0x37b/0x3e0 drivers/infiniband/sw/siw/siw_verbs.c:177 Read of size 4 at addr ffff888039cfe0e8 by task kworker/0:4/21991 CPU: 0 PID: 21991 Comm: kworker/0:4 Not tainted 6.4.0-rc3-syzkaller-00004-g421ca22e3138 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Workqueue: infiniband ib_cache_event_task Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 siw_query_port+0x37b/0x3e0 drivers/infiniband/sw/siw/siw_verbs.c:177 iw_query_port drivers/infiniband/core/device.c:2049 [inline] ib_query_port drivers/infiniband/core/device.c:2090 [inline] ib_query_port+0x3c4/0x8f0 drivers/infiniband/core/device.c:2082 ib_cache_update.part.0+0xcf/0x920 drivers/infiniband/core/cache.c:1487 ib_cache_update drivers/infiniband/core/cache.c:1561 [inline] ib_cache_event_task+0x1b1/0x270 drivers/infiniband/core/cache.c:1561 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 5033: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0x61/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:604 kvmalloc include/linux/slab.h:697 [inline] kvzalloc include/linux/slab.h:705 [inline] alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10626 __ip_tunnel_create+0x201/0x5b0 net/ipv4/ip_tunnel.c:254 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1091 ops_init+0xb9/0x6b0 net/core/net_namespace.c:136 setup_net+0x5d1/0xc50 net/core/net_namespace.c:339 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3444 __do_sys_unshare kernel/fork.c:3515 [inline] __se_sys_unshare kernel/fork.c:3513 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3513 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 41: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 kvfree+0x46/0x50 mm/util.c:650 device_release+0xa3/0x240 drivers/base/core.c:2484 kobject_cleanup lib/kobject.c:683 [inline] kobject_release lib/kobject.c:714 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:731 netdev_run_todo+0x762/0x1100 net/core/dev.c:10400 ip_tunnel_delete_nets+0x2c7/0x3a0 net/ipv4/ip_tunnel.c:1145 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888039cfe000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 232 bytes inside of freed 4096-byte region [ffff888039cfe000, ffff888039cff000) The buggy address belongs to the physical page: page:ffffea0000e73e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x39cf8 head:ffffea0000e73e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff88801244f500 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5041, tgid 5041 (syz-executor.1), ts 234376525187, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] snmp6_alloc_dev net/ipv6/addrconf.c:353 [inline] ipv6_add_dev+0x58e/0x13b0 net/ipv6/addrconf.c:403 addrconf_notify+0x63d/0x19f0 net/ipv6/addrconf.c:3552 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1935 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers net/core/dev.c:1987 [inline] register_netdevice+0xfb4/0x1640 net/core/dev.c:10118 __ip_tunnel_create+0x398/0x5b0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1091 page_owner free stack trace missing Memory state around the buggy address: ffff888039cfdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888039cfe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888039cfe080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888039cfe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888039cfe180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================