netdevsim netdevsim2: loading /lib/firmware/. failed with error -22
netdevsim netdevsim2: Direct firmware load for . failed with error -22
netdevsim netdevsim2: Falling back to sysfs fallback for: .
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x81/0xa0 lib/list_debug.c:23
Read of size 8 at addr ffff888016a714c8 by task syz-executor750/9747

CPU: 0 PID: 9747 Comm: syz-executor750 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436
 __list_add_valid+0x81/0xa0 lib/list_debug.c:23
 __list_add include/linux/list.h:67 [inline]
 list_add include/linux/list.h:86 [inline]
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:516 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:581 [inline]
 firmware_fallback_sysfs+0x455/0xe20 drivers/base/firmware_loader/fallback.c:657
 _request_firmware+0xa80/0xe80 drivers/base/firmware_loader/main.c:833
 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877
 devlink_compat_flash_update+0x25b/0x4f0 net/core/devlink.c:10524
 ethtool_flash_device+0x174/0x1a0 net/ethtool/ioctl.c:2072
 dev_ethtool+0x5e3/0x46d0 net/ethtool/ioctl.c:2765
 dev_ioctl+0x463/0xb70 net/core/dev_ioctl.c:440
 sock_do_ioctl+0x148/0x2d0 net/socket.c:1062
 sock_ioctl+0x477/0x6a0 net/socket.c:1179
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x443289
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd02727878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443289
RDX: 0000000020000000 RSI: 0000000000008946 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000090000000d R09: 000000090000000d
R10: 00007ffd027272f0 R11: 0000000000000246 R12: 00007ffd02727890
R13: 00000000000f4240 R14: 0000000000014f29 R15: 00007ffd02727884

Allocated by task 9737:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:428 [inline]
 ____kasan_kmalloc mm/kasan/common.c:507 [inline]
 ____kasan_kmalloc mm/kasan/common.c:466 [inline]
 __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:516
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 __allocate_fw_priv drivers/base/firmware_loader/main.c:187 [inline]
 alloc_lookup_fw_priv drivers/base/firmware_loader/main.c:251 [inline]
 _request_firmware_prepare drivers/base/firmware_loader/main.c:746 [inline]
 _request_firmware+0x2de/0xe80 drivers/base/firmware_loader/main.c:808
 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877
 devlink_compat_flash_update+0x25b/0x4f0 net/core/devlink.c:10524
 ethtool_flash_device+0x174/0x1a0 net/ethtool/ioctl.c:2072
 dev_ethtool+0x5e3/0x46d0 net/ethtool/ioctl.c:2765
 dev_ioctl+0x463/0xb70 net/core/dev_ioctl.c:440
 sock_do_ioctl+0x148/0x2d0 net/socket.c:1062
 sock_ioctl+0x477/0x6a0 net/socket.c:1179
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 9737:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
 ____kasan_slab_free mm/kasan/common.c:360 [inline]
 ____kasan_slab_free mm/kasan/common.c:325 [inline]
 __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368
 kasan_slab_free include/linux/kasan.h:212 [inline]
 slab_free_hook mm/slub.c:1582 [inline]
 slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1607
 slab_free mm/slub.c:3167 [inline]
 kfree+0xe5/0x7f0 mm/slub.c:4217
 __free_fw_priv drivers/base/firmware_loader/main.c:283 [inline]
 kref_put include/linux/kref.h:65 [inline]
 free_fw_priv+0x2b1/0x4d0 drivers/base/firmware_loader/main.c:290
 firmware_free_data drivers/base/firmware_loader/main.c:586 [inline]
 release_firmware.part.0+0xc7/0xf0 drivers/base/firmware_loader/main.c:1055
 release_firmware drivers/base/firmware_loader/main.c:842 [inline]
 _request_firmware+0x709/0xe80 drivers/base/firmware_loader/main.c:841
 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877
 devlink_compat_flash_update+0x25b/0x4f0 net/core/devlink.c:10524
 ethtool_flash_device+0x174/0x1a0 net/ethtool/ioctl.c:2072
 dev_ethtool+0x5e3/0x46d0 net/ethtool/ioctl.c:2765
 dev_ioctl+0x463/0xb70 net/core/dev_ioctl.c:440
 sock_do_ioctl+0x148/0x2d0 net/socket.c:1062
 sock_ioctl+0x477/0x6a0 net/socket.c:1179
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888016a71400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
 256-byte region [ffff888016a71400, ffff888016a71500)
The buggy address belongs to the page:
page:ffffea00005a9c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a70
head:ffffea00005a9c00 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011041b40
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
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 8459, ts 77381578965, free_ts 77381424834
 prep_new_page mm/page_alloc.c:2358 [inline]
 get_page_from_freelist+0x1033/0x2b60 mm/page_alloc.c:3994
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200
 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272
 alloc_slab_page mm/slub.c:1645 [inline]
 allocate_slab+0x2c5/0x4c0 mm/slub.c:1785
 new_slab mm/slub.c:1848 [inline]
 new_slab_objects mm/slub.c:2594 [inline]
 ___slab_alloc+0x4a1/0x810 mm/slub.c:2757
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2797
 slab_alloc_node mm/slub.c:2879 [inline]
 slab_alloc mm/slub.c:2921 [inline]
 __kmalloc+0x315/0x330 mm/slub.c:4055
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 fib_create_info+0x8a7/0x4870 net/ipv4/fib_semantics.c:1419
 fib_table_insert+0x1cd/0x1af0 net/ipv4/fib_trie.c:1224
 fib_magic+0x3b9/0x520 net/ipv4/fib_frontend.c:1085
 fib_add_ifaddr+0x493/0x520 net/ipv4/fib_frontend.c:1129
 fib_netdev_event+0x488/0x670 net/ipv4/fib_frontend.c:1466
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2121
 call_netdevice_notifiers_extack net/core/dev.c:2133 [inline]
 call_netdevice_notifiers net/core/dev.c:2147 [inline]
 __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8798
 dev_change_flags+0x112/0x170 net/core/dev.c:8836
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1298 [inline]
 __free_pages_ok+0x476/0xce0 mm/page_alloc.c:1572
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:438
 kasan_slab_alloc include/linux/kasan.h:236 [inline]
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2921 [inline]
 kmem_cache_alloc+0x219/0x3a0 mm/slub.c:2926
 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
 getname_flags fs/namei.c:2734 [inline]
 user_path_at_empty+0xa1/0x100 fs/namei.c:2734
 do_readlinkat+0xcd/0x2f0 fs/stat.c:425
 __do_sys_readlinkat fs/stat.c:452 [inline]
 __se_sys_readlinkat fs/stat.c:449 [inline]
 __x64_sys_readlinkat+0x93/0xf0 fs/stat.c:449
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff888016a71380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888016a71400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888016a71480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff888016a71500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888016a71580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================