usb 5-1: Direct firmware load for ueagle-atm/adi930.fw failed with error -2 usb 5-1: Falling back to sysfs fallback for: ueagle-atm/adi930.fw ================================================================== BUG: KASAN: slab-use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] BUG: KASAN: slab-use-after-free in kernfs_next_descendant_post+0x2d4/0x300 fs/kernfs/dir.c:1330 Read of size 8 at addr ffff88802f6934f8 by task kworker/0:2/814 CPU: 0 PID: 814 Comm: kworker/0:2 Not tainted 6.7.0-rc7-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: events request_firmware_work_func Call Trace: __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 kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] kernfs_next_descendant_post+0x2d4/0x300 fs/kernfs/dir.c:1330 kernfs_activate fs/kernfs/dir.c:1385 [inline] kernfs_add_one+0x3b5/0x510 fs/kernfs/dir.c:798 kernfs_create_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050 internal_create_group+0x773/0xb50 fs/sysfs/group.c:138 dpm_sysfs_add+0x7c/0x280 drivers/base/power/sysfs.c:702 device_add+0x9db/0x1aa0 drivers/base/core.c:3585 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline] firmware_fallback_sysfs+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Allocated by task 814: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:763 [inline] slab_alloc_node mm/slab.c:3237 [inline] slab_alloc mm/slab.c:3246 [inline] __kmem_cache_alloc_lru mm/slab.c:3423 [inline] kmem_cache_alloc+0x159/0x360 mm/slab.c:3432 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615 kernfs_new_node fs/kernfs/dir.c:679 [inline] kernfs_create_dir_ns+0x9a/0x210 fs/kernfs/dir.c:1040 internal_create_group+0x773/0xb50 fs/sysfs/group.c:138 dpm_sysfs_add+0x7c/0x280 drivers/base/power/sysfs.c:702 device_add+0x9db/0x1aa0 drivers/base/core.c:3585 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline] firmware_fallback_sysfs+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Freed by task 7: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] __cache_free mm/slab.c:3370 [inline] __do_kmem_cache_free mm/slab.c:3557 [inline] kmem_cache_free+0x104/0x390 mm/slab.c:3582 kernfs_put.part.0+0x22a/0x490 fs/kernfs/dir.c:569 kernfs_put+0x47/0x50 fs/kernfs/dir.c:543 __kernfs_remove+0x3ff/0x650 fs/kernfs/dir.c:1487 kernfs_remove+0x79/0xa0 fs/kernfs/dir.c:1507 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101 __kobject_del+0xd3/0x1e0 lib/kobject.c:601 kobject_del lib/kobject.c:624 [inline] kobject_del+0x3f/0x60 lib/kobject.c:616 device_del+0x66d/0xa50 drivers/base/core.c:3834 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265 hub_port_connect drivers/usb/core/hub.c:5280 [inline] hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] port_event drivers/usb/core/hub.c:5740 [inline] hub_event+0x1db7/0x4e10 drivers/usb/core/hub.c:5822 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 The buggy address belongs to the object at ffff88802f6934c8 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff88802f6934c8, ffff88802f693570) The buggy address belongs to the physical page: page:ffffea0000bda4c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802f693ec0 pfn:0x2f693 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x10() raw: 00fff00000000800 ffff888013ed7500 ffffea0000834190 ffffea00006ca810 raw: ffff88802f693ec0 ffff88802f693040 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 5210, tgid 5210 (syz-executor.0), ts 184970392208, free_ts 184908282813 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline] __alloc_pages+0x686/0x2420 mm/page_alloc.c:4581 __alloc_pages_node include/linux/gfp.h:238 [inline] kmem_getpages mm/slab.c:1356 [inline] cache_grow_begin+0x99/0x3a0 mm/slab.c:2550 cache_alloc_refill+0x295/0x3b0 mm/slab.c:2923 ____cache_alloc mm/slab.c:2999 [inline] ____cache_alloc mm/slab.c:2982 [inline] __do_cache_alloc mm/slab.c:3182 [inline] slab_alloc_node mm/slab.c:3230 [inline] slab_alloc mm/slab.c:3246 [inline] __kmem_cache_alloc_lru mm/slab.c:3423 [inline] kmem_cache_alloc+0x307/0x360 mm/slab.c:3432 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:679 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192 device_add_groups drivers/base/core.c:2727 [inline] device_add_attrs drivers/base/core.c:2847 [inline] device_add+0xf66/0x1aa0 drivers/base/core.c:3579 netdev_register_kobject+0x183/0x3f0 net/core/net-sysfs.c:2044 register_netdevice+0x1382/0x1da0 net/core/dev.c:10221 __ip_tunnel_create+0x4a1/0x670 net/ipv4/ip_tunnel.c:267 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2487 slab_destroy mm/slab.c:1608 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1628 cache_flusharray mm/slab.c:3341 [inline] ___cache_free+0x2b7/0x420 mm/slab.c:3404 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4c/0x1b0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:763 [inline] slab_alloc_node mm/slab.c:3237 [inline] kmem_cache_alloc_node+0x173/0x4a0 mm/slab.c:3509 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] nlmsg_new include/net/netlink.h:1010 [inline] netlink_ack+0x3bb/0x1380 net/netlink/af_netlink.c:2482 netlink_rcv_skb+0x345/0x440 net/netlink/af_netlink.c:2551 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 Memory state around the buggy address: ffff88802f693380: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb ffff88802f693400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802f693480: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb ^ ffff88802f693500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ffff88802f693580: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ==================================================================