wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x847/0x860 fs/udf/inode.c:2059 Write of size 4 at addr ffff888099521538 by task syz-executor.4/12846 CPU: 1 PID: 12846 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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: 0033:0x7f4d8deed0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4d8c45f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f4d8e00cf80 RCX: 00007f4d8deed0c9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007f4d8df48ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0431888f R14: 00007f4d8c45f300 R15: 0000000000022000 Allocated by task 3686: __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] nlmsg_new include/net/netlink.h:511 [inline] __neigh_notify+0x84/0x160 net/core/neighbour.c:2915 neigh_cleanup_and_release+0x71/0xd0 net/core/neighbour.c:106 neigh_del+0x1e5/0x2b0 net/core/neighbour.c:142 neigh_forced_gc net/core/neighbour.c:191 [inline] neigh_alloc net/core/neighbour.c:317 [inline] __neigh_create+0xd72/0x1c40 net/core/neighbour.c:501 ip6_finish_output2+0x8cc/0x2290 net/ipv6/ip6_output.c:117 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491 ndisc_send_ns+0x51d/0x840 net/ipv6/ndisc.c:633 addrconf_dad_work+0xb0e/0x10a0 net/ipv6/addrconf.c:4076 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Freed by task 3686: __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 net/netlink/af_netlink.c:1549 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0x15e/0x1f0 net/netlink/af_netlink.c:2506 __neigh_notify+0xdc/0x160 net/core/neighbour.c:2926 neigh_cleanup_and_release+0x71/0xd0 net/core/neighbour.c:106 neigh_del+0x1e5/0x2b0 net/core/neighbour.c:142 neigh_forced_gc net/core/neighbour.c:191 [inline] neigh_alloc net/core/neighbour.c:317 [inline] __neigh_create+0xd72/0x1c40 net/core/neighbour.c:501 ip6_finish_output2+0x8cc/0x2290 net/ipv6/ip6_output.c:117 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491 ndisc_send_ns+0x51d/0x840 net/ipv6/ndisc.c:633 addrconf_dad_work+0xb0e/0x10a0 net/ipv6/addrconf.c:4076 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8880995212c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 120 bytes to the right of 512-byte region [ffff8880995212c0, ffff8880995214c0) The buggy address belongs to the page: page:ffffea0002654840 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00026500c8 ffffea00029ffec8 ffff88813bff0940 raw: 0000000000000000 ffff888099521040 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888099521400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099521480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888099521500: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffff888099521580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888099521600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================