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 ffff888038ea80e8 by task kworker/0:8/7751 CPU: 0 PID: 7751 Comm: kworker/0:8 Not tainted 6.4.0-rc7-syzkaller-00213-gf1bc9fc4a06d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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 25185: 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+0x76/0x1a0 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:10628 nsim_create+0x95/0x5c0 drivers/net/netdevsim/netdev.c:342 __nsim_dev_port_add+0x2de/0x8a0 drivers/net/netdevsim/dev.c:1393 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1449 [inline] nsim_drv_probe+0xd52/0x13d0 drivers/net/netdevsim/dev.c:1607 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:958 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x112d/0x1a40 drivers/base/core.c:3625 nsim_bus_dev_new drivers/net/netdevsim/bus.c:290 [inline] new_device_store+0x40e/0x690 drivers/net/netdevsim/bus.c:167 bus_attr_store+0x76/0xa0 drivers/base/bus.c:170 sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x3f1/0x600 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x945/0xd50 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 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 9303: 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 put_device+0x1f/0x30 drivers/base/core.c:3733 free_netdev+0x441/0x620 net/core/dev.c:10777 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0x171/0x510 drivers/net/netdevsim/dev.c:1661 nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1676 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x399/0xa30 drivers/base/core.c:3814 device_unregister+0x1e/0xc0 drivers/base/core.c:3844 nsim_bus_dev_del drivers/net/netdevsim/bus.c:310 [inline] del_device_store+0x34e/0x4a0 drivers/net/netdevsim/bus.c:219 bus_attr_store+0x76/0xa0 drivers/base/bus.c:170 sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x3f1/0x600 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x945/0xd50 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 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 The buggy address belongs to the object at ffff888038ea8000 which belongs to the cache kmalloc-cg-8k of size 8192 The buggy address is located 232 bytes inside of freed 8192-byte region [ffff888038ea8000, ffff888038eaa000) The buggy address belongs to the physical page: page:ffffea0000e3aa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38ea8 head:ffffea0000e3aa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88807aa5ff01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff88801244f640 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000020002 00000001ffffffff ffff88807aa5ff01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 25185, tgid 25185 (syz-executor.2), ts 830163045769, free_ts 830135676346 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 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x76/0x1a0 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:10628 nsim_create+0x95/0x5c0 drivers/net/netdevsim/netdev.c:342 __nsim_dev_port_add+0x2de/0x8a0 drivers/net/netdevsim/dev.c:1393 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1449 [inline] nsim_drv_probe+0xd52/0x13d0 drivers/net/netdevsim/dev.c:1607 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:800 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3496 __alloc_skb+0x288/0x330 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1288 [inline] nlmsg_new include/net/netlink.h:1003 [inline] devlink_trap_notify net/devlink/leftover.c:8910 [inline] devlink_trap_notify+0x8a/0x230 net/devlink/leftover.c:8898 devlink_trap_unregister+0x128/0x3a0 net/devlink/leftover.c:8978 devl_traps_unregister+0x222/0x2c0 net/devlink/leftover.c:9085 nsim_dev_traps_exit+0x53/0x170 drivers/net/netdevsim/dev.c:939 nsim_dev_reload_destroy+0x1de/0x510 drivers/net/netdevsim/dev.c:1666 nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1676 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1295 Memory state around the buggy address: ffff888038ea7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888038ea8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888038ea8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888038ea8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888038ea8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================