================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x847/0x860 fs/udf/inode.c:2059 Write of size 4 at addr ffff8880aa536838 by task syz-executor.1/19274 CPU: 1 PID: 19274 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_store_n_noabort+0x8b/0xa0 mm/kasan/report.c:449 udf_write_aext+0x847/0x860 fs/udf/inode.c:2059 udf_add_entry+0xdab/0x2a20 fs/udf/namei.c:496 udf_mkdir+0x145/0x650 fs/udf/namei.c:693 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819 do_mkdirat+0x262/0x2d0 fs/namei.c:3842 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc167127639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc165658168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fc167248120 RCX: 00007fc167127639 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007fc167182a41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd9f49dc9f R14: 00007fc165658300 R15: 0000000000022000 Allocated by task 18080: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] alloc_uevent_skb+0x7b/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:350 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0x10f1/0x1480 lib/kobject_uevent.c:591 rx_queue_add_kobject net/core/net-sysfs.c:948 [inline] net_rx_queue_update_kobjects+0xf2/0x450 net/core/net-sysfs.c:970 register_queue_kobjects net/core/net-sysfs.c:1587 [inline] netdev_register_kobject+0x279/0x430 net/core/net-sysfs.c:1810 register_netdevice+0xb46/0x10f0 net/core/dev.c:8730 bond_newlink drivers/net/bonding/bond_netlink.c:453 [inline] bond_newlink+0x47/0xa0 drivers/net/bonding/bond_netlink.c:443 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 18080: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] consume_skb+0x113/0x3d0 net/core/skbuff.c:714 netlink_broadcast_filtered+0x31f/0xbc0 net/netlink/af_netlink.c:1527 netlink_broadcast+0x35/0x40 net/netlink/af_netlink.c:1549 uevent_net_broadcast_tagged lib/kobject_uevent.c:371 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0x11d4/0x1480 lib/kobject_uevent.c:591 rx_queue_add_kobject net/core/net-sysfs.c:948 [inline] net_rx_queue_update_kobjects+0xf2/0x450 net/core/net-sysfs.c:970 register_queue_kobjects net/core/net-sysfs.c:1587 [inline] netdev_register_kobject+0x279/0x430 net/core/net-sysfs.c:1810 register_netdevice+0xb46/0x10f0 net/core/dev.c:8730 bond_newlink drivers/net/bonding/bond_netlink.c:453 [inline] bond_newlink+0x47/0xa0 drivers/net/bonding/bond_netlink.c:443 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880aa5365c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 120 bytes to the right of 512-byte region [ffff8880aa5365c0, ffff8880aa5367c0) The buggy address belongs to the page: page:ffffea0002a94d80 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002acefc8 ffffea0002bbcd08 ffff88813bff0940 raw: 0000000000000000 ffff8880aa5360c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880aa536700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880aa536780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880aa536800: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffff8880aa536880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880aa536900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================