syzbot

netdevsim0 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 ffff888079a340e8 by task kworker/0:15/3496

CPU: 0 PID: 3496 Comm: kworker/0:15 Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: infiniband ib_cache_event_task
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 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+0x3cf/0x8a0 drivers/infiniband/core/device.c:2082
 ib_cache_update.part.0+0xd9/0x920 drivers/infiniband/core/cache.c:1487
 ib_cache_update drivers/infiniband/core/cache.c:1561 [inline]
 ib_cache_event_task+0x1c2/0x290 drivers/infiniband/core/cache.c:1561
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Allocated by task 16368:
 kasan_save_stack+0x33/0x50 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+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:1023 [inline]
 __kmalloc_node+0x63/0x110 mm/slab_common.c:1030
 kmalloc_node include/linux/slab.h:619 [inline]
 kvmalloc_node+0x6f/0x1a0 mm/util.c:607
 kvmalloc include/linux/slab.h:737 [inline]
 kvzalloc include/linux/slab.h:745 [inline]
 alloc_netdev_mqs+0x9b/0x1290 net/core/dev.c:10681
 nsim_create+0x96/0x600 drivers/net/netdevsim/netdev.c:379
 __nsim_dev_port_add+0x494/0x8a0 drivers/net/netdevsim/dev.c:1390
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1446 [inline]
 nsim_drv_probe+0xdbb/0x1490 drivers/net/netdevsim/dev.c:1604
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:798
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828
 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:956
 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x11f1/0x1b40 drivers/base/core.c:3623
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:290 [inline]
 new_device_store+0x426/0x6a0 drivers/net/netdevsim/bus.c:167
 bus_attr_store+0x76/0xa0 drivers/base/bus.c:170
 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x3ff/0x610 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x650/0xe40 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 940:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
 slab_free mm/slub.c:3809 [inline]
 __kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
 kvfree+0x47/0x50 mm/util.c:653
 device_release+0xa1/0x240 drivers/base/core.c:2484
 kobject_cleanup lib/kobject.c:682 [inline]
 kobject_release lib/kobject.c:713 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x5b0 lib/kobject.c:730
 put_device+0x1f/0x30 drivers/base/core.c:3731
 free_netdev+0x408/0x5f0 net/core/dev.c:10831
 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1425
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline]
 nsim_dev_reload_destroy+0x172/0x560 drivers/net/netdevsim/dev.c:1658
 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:965
 devlink_reload+0x11c/0x450 net/devlink/dev.c:389
 devlink_pernet_pre_exit+0x1ce/0x2a0 net/devlink/core.c:288
 ops_pre_exit_list net/core/net_namespace.c:160 [inline]
 cleanup_net+0x46c/0xb20 net/core/net_namespace.c:602
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

The buggy address belongs to the object at ffff888079a34000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 232 bytes inside of
 freed 8192-byte region [ffff888079a34000, ffff888079a36000)

The buggy address belongs to the physical page:
page:ffffea0001e68c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79a30
head:ffffea0001e68c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff88801284f640 ffffea00012b4800 dead000000000003
raw: 0000000000000000 0000000000020002 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5054, tgid 5054 (syz-executor.5), ts 57234167700, free_ts 57230039767
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3183
 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4439
 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2298
 alloc_slab_page mm/slub.c:1870 [inline]
 allocate_slab+0x251/0x380 mm/slub.c:2017
 new_slab mm/slub.c:2070 [inline]
 ___slab_alloc+0x8be/0x1570 mm/slub.c:3223
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3517
 __do_kmalloc_node mm/slab_common.c:1022 [inline]
 __kmalloc_node+0x52/0x110 mm/slab_common.c:1030
 kmalloc_node include/linux/slab.h:619 [inline]
 kvmalloc_node+0x6f/0x1a0 mm/util.c:607
 kvmalloc include/linux/slab.h:737 [inline]
 kvzalloc include/linux/slab.h:745 [inline]
 alloc_netdev_mqs+0x9b/0x1290 net/core/dev.c:10681
 nsim_create+0x96/0x600 drivers/net/netdevsim/netdev.c:379
 __nsim_dev_port_add+0x494/0x8a0 drivers/net/netdevsim/dev.c:1390
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1446 [inline]
 nsim_drv_probe+0xdbb/0x1490 drivers/net/netdevsim/dev.c:1604
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:798
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x172/0x3b0 mm/slub.c:3502
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xd3/0x8a0 fs/kernfs/dir.c:611
 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:675
 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb40 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2726 [inline]
 device_add_attrs drivers/base/core.c:2846 [inline]
 device_add+0xfe3/0x1b40 drivers/base/core.c:3577
 netdev_register_kobject+0x183/0x3f0 net/core/net-sysfs.c:2044
 register_netdevice+0xbcb/0x1490 net/core/dev.c:10136
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:343 [inline]
 nsim_create+0x46f/0x600 drivers/net/netdevsim/netdev.c:395

Memory state around the buggy address:
 ffff888079a33f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888079a34000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888079a34080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff888079a34100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888079a34180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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