UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) audit: type=1800 audit(1669542985.654:116): pid=30080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=830 res=0 ================================================================== BUG: KASAN: slab-out-of-bounds in udf_get_fileident+0x233/0x250 fs/udf/directory.c:176 Read of size 2 at addr ffff8880ae4123c0 by task syz-executor.5/30080 CPU: 1 PID: 30080 Comm: syz-executor.5 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 audit: type=1800 audit(1669542985.654:117): pid=30080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=830 res=0 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 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f856a6360d9 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:00007f8568ba8168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f856a755f80 RCX: 00007f856a6360d9 RDX: 000000000000009c RSI: 0000000020000280 RDI: 0000000000000008 RBP: 00007f856a691ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed70e13ff R14: 00007f8568ba8300 R15: 0000000000022000 Allocated by task 30080: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc_array include/linux/slab.h:637 [inline] kcalloc include/linux/slab.h:648 [inline] alloc_pipe_info+0x193/0x470 fs/pipe.c:679 splice_direct_to_actor+0x6dd/0x8d0 fs/splice.c:921 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8182: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] pskb_expand_head+0x327/0xf20 net/core/skbuff.c:1506 netlink_trim+0x200/0x250 net/netlink/af_netlink.c:1307 netlink_broadcast_filtered+0x61/0xbc0 net/netlink/af_netlink.c:1504 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 rtmsg_fib+0x37e/0x4e0 net/ipv4/fib_semantics.c:428 fib_table_insert+0x6e6/0x1620 net/ipv4/fib_trie.c:1287 fib_magic+0x3c6/0x540 net/ipv4/fib_frontend.c:892 fib_add_ifaddr+0x3a3/0x520 net/ipv4/fib_frontend.c:927 fib_netdev_event+0x424/0x570 net/ipv4/fib_frontend.c:1271 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1762 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:7717 dev_change_flags+0xf0/0x140 net/core/dev.c:7753 do_setlink+0x14f1/0x3540 net/core/rtnetlink.c:2449 rtnl_newlink+0xda9/0x15c0 net/core/rtnetlink.c:3077 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_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 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 ffff8880ae412000 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 960 bytes inside of 1024-byte region [ffff8880ae412000, ffff8880ae412400) The buggy address belongs to the page: page:ffffea0002b90480 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea00026e4c08 ffffea0002d3e488 ffff88813bff0ac0 raw: 0000000000000000 ffff8880ae412000 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880ae412280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880ae412300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880ae412380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880ae412400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880ae412480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================