UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x780/0x860 fs/udf/inode.c:2065 Write of size 4 at addr ffff8880b4fa9070 by task syz-executor156/8126 CPU: 0 PID: 8126 Comm: syz-executor156 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+0x780/0x860 fs/udf/inode.c:2065 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: 0033:0x7ff635e416b7 Code: ff ff ff ff c3 66 0f 1f 44 00 00 48 c7 c0 c0 ff ff ff 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 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:00007ffc9ec283d8 EFLAGS: 00000286 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00005555556bc380 RCX: 00007ff635e416b7 RDX: 1100000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007ffc9ec28470 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010012 R11: 0000000000000286 R12: 00000000ffffffff R13: 0000000020000100 R14: 0000000020000000 R15: 0000000000000000 Allocated by task 8126: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] kzalloc include/linux/slab.h:709 [inline] udf_new_inode+0x220/0xf30 fs/udf/ialloc.c:75 udf_mkdir+0xa8/0x650 fs/udf/namei.c:686 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 Freed by task 6220: __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 skb_free_datagram+0x16/0xf0 net/core/datagram.c:329 netlink_recvmsg+0x627/0xea0 net/netlink/af_netlink.c:1996 sock_recvmsg_nosec net/socket.c:859 [inline] sock_recvmsg net/socket.c:866 [inline] sock_recvmsg+0xca/0x110 net/socket.c:862 ___sys_recvmsg+0x255/0x570 net/socket.c:2389 __sys_recvmsg net/socket.c:2438 [inline] __do_sys_recvmsg net/socket.c:2448 [inline] __se_sys_recvmsg net/socket.c:2445 [inline] __x64_sys_recvmsg+0x12f/0x220 net/socket.c:2445 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 ffff8880b4fa9080 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 16 bytes to the left of 512-byte region [ffff8880b4fa9080, ffff8880b4fa9280) The buggy address belongs to the page: page:ffffea0002d3ea40 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00027f2fc8 ffffea0002a42cc8 ffff88813bff0940 raw: 0000000000000000 ffff8880b4fa9080 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b4fa8f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880b4fa8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880b4fa9000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880b4fa9080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880b4fa9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================