================================================================== BUG: KASAN: slab-out-of-bounds in udf_close_lvid.isra.0+0x4a7/0x550 fs/udf/super.c:2039 Write of size 1 at addr ffff88806b249b88 by task syz-executor.2/5570 CPU: 0 PID: 5570 Comm: syz-executor.2 Not tainted 6.3.0-rc7-next-20230421-syzkaller-13719-gd3e1ee0e67e7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 udf_close_lvid.isra.0+0x4a7/0x550 fs/udf/super.c:2039 udf_put_super+0x1bb/0x230 fs/udf/super.c:2326 generic_shutdown_super+0x158/0x480 fs/super.c:500 kill_block_super+0xa1/0x100 fs/super.c:1407 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fce0448d537 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffd89f3b6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fce0448d537 RDX: 00007ffd89f3b789 RSI: 000000000000000a RDI: 00007ffd89f3b780 RBP: 00007ffd89f3b780 R08: 00000000ffffffff R09: 00007ffd89f3b550 R10: 0000555555f6e8b3 R11: 0000000000000246 R12: 00007fce044e6b24 R13: 00007ffd89f3c840 R14: 0000555555f6e810 R15: 00007ffd89f3c880 Allocated by task 4655: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0x5f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:585 __alloc_skb+0x129/0x330 net/core/skbuff.c:654 alloc_skb include/linux/skbuff.h:1288 [inline] alloc_skb_with_frags+0x9a/0x6c0 net/core/skbuff.c:6373 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2729 unix_dgram_sendmsg+0x41b/0x1950 net/unix/af_unix.c:1944 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 sock_write_iter+0x295/0x3d0 net/socket.c:1140 call_write_iter include/linux/fs.h:1854 [inline] do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735 do_iter_write+0x185/0x7e0 fs/read_write.c:860 vfs_writev+0x1aa/0x670 fs/read_write.c:933 do_writev+0x279/0x2f0 fs/read_write.c:976 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 4656: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 skb_kfree_head net/core/skbuff.c:906 [inline] skb_free_head+0x110/0x1b0 net/core/skbuff.c:918 skb_release_data+0x598/0x820 net/core/skbuff.c:948 skb_release_all net/core/skbuff.c:1014 [inline] __kfree_skb net/core/skbuff.c:1028 [inline] consume_skb net/core/skbuff.c:1244 [inline] consume_skb+0xd2/0x170 net/core/skbuff.c:1238 __unix_dgram_recvmsg+0x42c/0xb90 net/unix/af_unix.c:2532 unix_dgram_recvmsg+0xc4/0xf0 net/unix/af_unix.c:2549 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg+0xe2/0x160 net/socket.c:1040 sock_read_iter+0x2bd/0x3b0 net/socket.c:1118 call_read_iter include/linux/fs.h:1848 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x828/0x960 fs/read_write.c:470 ksys_read+0x1ec/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88806b249800 which belongs to the cache kmalloc-cg-512 of size 512 The buggy address is located 392 bytes to the right of allocated 512-byte region [ffff88806b249800, ffff88806b249a00) The buggy address belongs to the physical page: page:ffffea0001ac9200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b248 head:ffffea0001ac9200 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888018f16501 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff88801244f140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000100010 00000001ffffffff ffff888018f16501 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5540, tgid 5540 (udevd), ts 88985901692, free_ts 15303828892 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf7c/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2277 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:585 __alloc_skb+0x129/0x330 net/core/skbuff.c:654 alloc_skb include/linux/skbuff.h:1288 [inline] alloc_skb_with_frags+0x9a/0x6c0 net/core/skbuff.c:6373 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2729 unix_dgram_sendmsg+0x41b/0x1950 net/unix/af_unix.c:1944 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 sock_write_iter+0x295/0x3d0 net/socket.c:1140 call_write_iter include/linux/fs.h:1854 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0xa1d/0xe40 fs/read_write.c:584 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 free_contig_range+0xb5/0x180 mm/page_alloc.c:6985 destroy_args+0x6c4/0x920 mm/debug_vm_pgtable.c:1023 debug_vm_pgtable+0x214a/0x4050 mm/debug_vm_pgtable.c:1403 do_one_initcall+0x102/0x540 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x5a4/0x890 init/main.c:1571 kernel_init+0x1e/0x2c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88806b249a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806b249b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88806b249b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88806b249c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806b249c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================