RDX: 0000000000000000 RSI: 000000404000f000 RDI: 0000200000000080 RBP: 00007f88dd211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f88dd3e6038 R14: 00007f88dd3e5fa0 R15: 00007ffc33a15068 ================================================================== BUG: KASAN: slab-out-of-bounds in udf_get_fileshortad+0x152/0x1a0 fs/udf/directory.c:497 Read of size 4 at addr ffff88807d835f38 by task syz.0.17/5071 CPU: 1 PID: 5071 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 udf_get_fileshortad+0x152/0x1a0 fs/udf/directory.c:497 udf_current_aext+0x43a/0xb00 fs/udf/inode.c:2122 udf_next_aext+0x101/0x450 fs/udf/inode.c:2057 udf_extend_file fs/udf/inode.c:549 [inline] udf_setsize+0x9f7/0x1090 fs/udf/inode.c:1147 udf_setattr+0x404/0x560 fs/udf/file.c:279 notify_change+0xc74/0xf40 fs/attr.c:499 do_truncate+0x197/0x220 fs/open.c:65 vfs_truncate+0x262/0x2f0 fs/open.c:111 do_sys_truncate+0xdc/0x190 fs/open.c:134 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f88dd18efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f88ddf4a038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f88dd3e5fa0 RCX: 00007f88dd18efc9 RDX: 0000000000000000 RSI: 000000404000f000 RDI: 0000200000000080 RBP: 00007f88dd211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f88dd3e6038 R14: 00007f88dd3e5fa0 R15: 00007ffc33a15068 Allocated by task 4825: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xb0/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] load_elf_phdrs fs/binfmt_elf.c:507 [inline] load_elf_binary+0x2c9/0x26d0 fs/binfmt_elf.c:887 search_binary_handler fs/exec.c:1764 [inline] exec_binprm fs/exec.c:1805 [inline] bprm_execve+0xb10/0x18a0 fs/exec.c:1874 do_execveat_common+0x51b/0x6c0 fs/exec.c:1979 do_execve fs/exec.c:2053 [inline] __do_sys_execve fs/exec.c:2129 [inline] __se_sys_execve fs/exec.c:2124 [inline] __x64_sys_execve+0x8e/0xa0 fs/exec.c:2124 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x154/0x980 kernel/rcu/tree.c:2849 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff88807d835800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 824 bytes to the right of 1024-byte region [ffff88807d835800, ffff88807d835c00) The buggy address belongs to the physical page: page:ffffea0001f60c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807d833000 pfn:0x7d830 head:ffffea0001f60c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001a56608 ffffea0001d73608 ffff888017441dc0 raw: ffff88807d833000 0000000000100006 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4284, tgid 4284 (syz-executor), ts 65509220780, free_ts 64352437078 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 alloc_slab_page+0x5d/0x160 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2c0 mm/slub.c:1997 ___slab_alloc+0xbc6/0x1230 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] __kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node+0xa0/0x240 mm/slab_common.c:943 kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x6c/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:716 [inline] kvzalloc include/linux/slab.h:724 [inline] bucket_table_alloc lib/rhashtable.c:184 [inline] rhashtable_init+0x57b/0xa70 lib/rhashtable.c:1061 ioam6_net_init+0xa5/0x140 net/ipv6/ioam6.c:910 ops_init+0x355/0x5f0 net/core/net_namespace.c:138 setup_net+0x4e1/0xbb0 net/core/net_namespace.c:336 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:508 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x116/0x160 kernel/nsproxy.c:226 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479 __skb_frag_unref include/linux/skbuff.h:3459 [inline] skb_release_data+0x499/0x7c0 net/core/skbuff.c:785 skb_release_all net/core/skbuff.c:856 [inline] __kfree_skb+0x4c/0x60 net/core/skbuff.c:870 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3412 [inline] tcp_ack+0x1f57/0x65b0 net/ipv4/tcp_input.c:3971 tcp_rcv_established+0xbb3/0x1d30 net/ipv4/tcp_input.c:6102 tcp_v4_do_rcv+0x48d/0xb00 net/ipv4/tcp_ipv4.c:1683 sk_backlog_rcv include/net/sock.h:1125 [inline] __release_sock+0x1b9/0x420 net/core/sock.c:2944 __sk_flush_backlog+0x22/0x30 net/core/sock.c:2964 sk_flush_backlog include/net/sock.h:1223 [inline] tcp_sendmsg_locked+0x3021/0x3f10 net/ipv4/tcp.c:1328 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1490 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] sock_write_iter+0x2b5/0x3a0 net/socket.c:1143 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x44c/0x960 fs/read_write.c:584 ksys_write+0x143/0x240 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88807d835e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d835e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807d835f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807d835f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d836000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================