================================================================== BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline] BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598 Read of size 8 at addr ffff8880270200b8 by task kworker/2:3/5746 CPU: 2 UID: 0 PID: 5746 Comm: kworker/2:3 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 __intf_to_usbdev include/linux/usb.h:752 [inline] uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 19511: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5362 [inline] __kmalloc_node_track_caller_noprof+0x331/0x830 mm/slub.c:5497 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] _sctp_make_chunk+0x51/0x270 net/sctp/sm_make_chunk.c:1435 sctp_make_data net/sctp/sm_make_chunk.c:1467 [inline] sctp_make_datafrag_empty+0x14e/0x230 net/sctp/sm_make_chunk.c:732 sctp_datamsg_from_user+0x5ea/0x1360 net/sctp/chunk.c:263 sctp_sendmsg_to_asoc+0xb1c/0x1c50 net/sctp/socket.c:1858 sctp_sendmsg+0x1144/0x22e0 net/sctp/socket.c:2039 inet_sendmsg+0x11c/0x140 net/ipv4/af_inet.c:865 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] __sys_sendto+0x453/0x4e0 net/socket.c:2252 __do_sys_sendto net/socket.c:2259 [inline] __se_sys_sendto net/socket.c:2255 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2255 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 19514: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kfree+0x22b/0x6c0 mm/slub.c:6720 skb_kfree_head net/core/skbuff.c:1077 [inline] skb_free_head+0xb9/0x160 net/core/skbuff.c:1089 skb_release_data+0x6c5/0x8e0 net/core/skbuff.c:1116 skb_release_all net/core/skbuff.c:1191 [inline] __kfree_skb net/core/skbuff.c:1205 [inline] consume_skb net/core/skbuff.c:1439 [inline] consume_skb+0xc4/0x110 net/core/skbuff.c:1433 sctp_chunk_destroy net/sctp/sm_make_chunk.c:1495 [inline] sctp_chunk_put+0x1b2/0x2d0 net/sctp/sm_make_chunk.c:1522 sctp_datamsg_destroy net/sctp/chunk.c:111 [inline] sctp_datamsg_put+0x129/0x5f0 net/sctp/chunk.c:128 sctp_chunk_free+0x45/0x60 net/sctp/sm_make_chunk.c:1507 __sctp_outq_teardown+0x70a/0xc40 net/sctp/outqueue.c:257 sctp_association_free+0x210/0x7d0 net/sctp/associola.c:340 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:950 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1336 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1204 [inline] sctp_do_sm+0x1594/0x5be0 net/sctp/sm_sideeffect.c:1175 sctp_primitive_SHUTDOWN+0x9f/0xd0 net/sctp/primitive.c:89 sctp_close+0x3ff/0x980 net/sctp/socket.c:1529 inet_release+0xed/0x200 net/ipv4/af_inet.c:442 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:472 __sock_release+0xb3/0x260 net/socket.c:710 sock_close+0x1c/0x30 net/socket.c:1501 __fput+0x3ff/0xb50 fs/file_table.c:512 fput_close_sync+0x118/0x250 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888027020000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 184 bytes inside of freed 2048-byte region [ffff888027020000, ffff888027020800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27020 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801bc42f00 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801bc42f00 dead000000000100 dead000000000122 head: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 12079, tgid 12079 (syz-executor), ts 185185967866, free_ts 185136339264 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3294 [inline] allocate_slab mm/slub.c:3408 [inline] new_slab+0xa2/0x650 mm/slub.c:3454 refill_objects+0xe3/0x410 mm/slub.c:7338 refill_sheaf mm/slub.c:2832 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703 alloc_from_pcs mm/slub.c:4801 [inline] slab_alloc_node mm/slub.c:4933 [inline] __kmalloc_cache_noprof+0x479/0x6c0 mm/slub.c:5511 _kmalloc_noprof include/linux/slab.h:969 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] batadv_hardif_add_interface net/batman-adv/hard-interface.c:878 [inline] batadv_hard_if_event+0x14bf/0x3870 net/batman-adv/hard-interface.c:1087 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x110 net/core/dev.c:2250 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] register_netdevice+0x1998/0x25a0 net/core/dev.c:11478 veth_newlink+0x44a/0xa00 drivers/net/veth.c:1892 rtnl_newlink_create net/core/rtnetlink.c:3913 [inline] __rtnl_newlink net/core/rtnetlink.c:4044 [inline] rtnl_newlink+0x1499/0x2380 net/core/rtnetlink.c:4159 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7076 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 page last free pid 5448 tgid 5448 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4612 [inline] slab_alloc_node mm/slub.c:4945 [inline] kmem_cache_alloc_node_noprof+0x27d/0x6b0 mm/slub.c:5017 __alloc_skb+0x140/0x710 net/core/skbuff.c:704 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_skb_with_frags+0xdd/0x760 net/core/skbuff.c:6769 sock_alloc_send_pskb+0x801/0x980 net/core/sock.c:3010 unix_dgram_sendmsg+0x3c7/0x1810 net/unix/af_unix.c:2136 unix_seqpacket_sendmsg+0x12a/0x1d0 net/unix/af_unix.c:2537 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] sock_write_iter+0x53a/0x5b0 net/socket.c:1241 do_iter_readv_writev+0x6f7/0x930 fs/read_write.c:828 vfs_writev+0x360/0xdd0 fs/read_write.c:1058 do_writev+0x28a/0x340 fs/read_write.c:1104 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88802701ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888027020000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888027020080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888027020100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888027020180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================