UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/17 09:39 (1000) UDF-fs: warning (device loop4): udf_load_vrs: No VRS found ================================================================== BUG: KASAN: slab-out-of-bounds in udf_get_fileident+0x233/0x250 fs/udf/directory.c:176 Read of size 2 at addr ffff8880944805fc by task syz-executor.0/28631 CPU: 0 PID: 28631 Comm: syz-executor.0 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_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 udf_get_fileident+0x233/0x250 fs/udf/directory.c:176 udf_fileident_read+0x550/0x1930 fs/udf/directory.c:37 udf_readdir+0x559/0x1350 fs/udf/dir.c:129 iterate_dir+0x473/0x5c0 fs/readdir.c:51 __do_sys_getdents fs/readdir.c:271 [inline] __se_sys_getdents+0x175/0x2d0 fs/readdir.c:252 UDF-fs: Scanning with blocksize 512 failed do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6cbb858189 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:00007f6cb9dca168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f6cbb977f80 RCX: 00007f6cbb858189 RDX: 0000000000000018 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00007f6cbb8b3b01 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0c04502f R14: 00007f6cb9dca300 R15: 0000000000022000 Allocated by task 28631: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] udf_alloc_i_data+0x1f/0x70 fs/udf/inode.c:1601 udf_read_inode fs/udf/inode.c:1408 [inline] __udf_iget+0x24dd/0x31a0 fs/udf/inode.c:1872 udf_iget fs/udf/udfdecl.h:155 [inline] udf_lookup fs/udf/namei.c:334 [inline] udf_lookup+0x212/0x270 fs/udf/namei.c:296 lookup_open+0x698/0x1a20 fs/namei.c:3214 do_last fs/namei.c:3327 [inline] path_openat+0x1804/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 snmp6_free_dev net/ipv6/addrconf_core.c:200 [inline] in6_dev_finish_destroy_rcu+0x35/0xa0 net/ipv6/addrconf_core.c:209 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff8880944806c0 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 196 bytes to the left of 4096-byte region [ffff8880944806c0, ffff8880944816c0) The buggy address belongs to the page: page:ffffea0002512000 count:1 mapcount:0 mapping:ffff88813bff0dc0 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea00027a2608 ffffea000278a408 ffff88813bff0dc0 raw: 0000000000000000 ffff8880944806c0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888094480480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888094480500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888094480580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888094480600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888094480680: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ==================================================================