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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 ffff8880580f16d8 by task kworker/u8:3/48

CPU: 0 UID: 0 PID: 48 Comm: kworker/u8:3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: ib-unreg-wq ib_unregister_work
Call Trace:
 <TASK>
 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
 check_slab_allocation mm/kasan/common.c:-1 [inline]
 __kasan_slab_pre_free+0x104/0x120 mm/kasan/common.c:261
 kasan_slab_pre_free include/linux/kasan.h:199 [inline]
 slab_free_hook mm/slub.c:2634 [inline]
 slab_free mm/slub.c:6242 [inline]
 kfree+0x173/0x640 mm/slub.c:6557
 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
 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
 </TASK>

Allocated by task 16596:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5292 [inline]
 __kmalloc_noprof+0x35c/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
 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline]
 siw_newlink+0x8fe/0xde0 drivers/infiniband/sw/siw/siw_main.c:430
 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
 sock_sendmsg_nosec net/socket.c:786 [inline]
 __sock_sendmsg net/socket.c:801 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2650
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2704
 __sys_sendmsg net/socket.c:2736 [inline]
 __do_sys_sendmsg net/socket.c:2741 [inline]
 __se_sys_sendmsg net/socket.c:2739 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2739
 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

The buggy address belongs to the object at ffff8880580f1600
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 216 bytes inside of
 224-byte region [ffff8880580f1600, ffff8880580f16e0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880580f0c00 pfn:0x580f0
head: order:1 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 ffff88813fe25b40 ffffea0001e54590 ffffea0000d0af90
raw: ffff8880580f0c00 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88813fe25b40 ffffea0001e54590 ffffea0000d0af90
head: ffff8880580f0c00 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5848, tgid 5848 (syz-executor), ts 81022672545, free_ts 26586708242
 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_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x339/0x3d0 mm/slub.c:7247
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651
 alloc_from_pcs mm/slub.c:4749 [inline]
 slab_alloc_node mm/slub.c:4883 [inline]
 __do_kmalloc_node mm/slub.c:5291 [inline]
 __kmalloc_noprof+0x474/0x760 mm/slub.c:5304
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 new_dir fs/proc/proc_sysctl.c:966 [inline]
 get_subdir fs/proc/proc_sysctl.c:1010 [inline]
 sysctl_mkdir_p fs/proc/proc_sysctl.c:1320 [inline]
 __register_sysctl_table+0xba1/0x1340 fs/proc/proc_sysctl.c:1395
 neigh_sysctl_register+0x9b1/0xa90 net/core/neighbour.c:3922
 addrconf_sysctl_register+0xb3/0x1c0 net/ipv6/addrconf.c:7372
 ipv6_add_dev+0xd26/0x13a0 net/ipv6/addrconf.c:460
 addrconf_notify+0x771/0x1050 net/ipv6/addrconf.c:3655
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2285 [inline]
 call_netdevice_notifiers net/core/dev.c:2299 [inline]
 register_netdevice+0x173a/0x1cf0 net/core/dev.c:11494
 veth_newlink+0x67b/0xb70 drivers/net/veth.c:1889
 rtnl_newlink_create+0x329/0xb70 net/core/rtnetlink.c:3862
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:1402 [inline]
 __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943
 __free_pages mm/page_alloc.c:5345 [inline]
 free_contig_range+0xb7/0x100 mm/page_alloc.c:7313
 destroy_args+0x4e5/0x570 mm/debug_vm_pgtable.c:993
 debug_vm_pgtable+0x3f8/0x410 mm/debug_vm_pgtable.c:1368
 do_one_initcall+0x250/0x870 init/main.c:1391
 do_initcall_level+0x104/0x190 init/main.c:1453
 do_initcalls+0x59/0xa0 init/main.c:1469
 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1701
 kernel_init+0x1d/0x1d0 init/main.c:1591
 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:
 ffff8880580f1580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880580f1600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880580f1680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                    ^
 ffff8880580f1700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880580f1780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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