================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x780/0x860 fs/udf/inode.c:2065 Write of size 4 at addr ffff8880a4e9c0b0 by task syz-executor.1/16698 CPU: 1 PID: 16698 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 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: 0033:0x7f99772435a9 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:00007f9975bb7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f9977364f80 RCX: 00007f99772435a9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004 RBP: 00007f997729e580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9eda502f R14: 00007f9975bb7300 R15: 0000000000022000 Allocated by task 16698: __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 8753: __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] kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672 ieee80211_iface_work+0x289/0x8a0 net/mac80211/iface.c:1353 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8880a4e9c0c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 16 bytes to the left of 512-byte region [ffff8880a4e9c0c0, ffff8880a4e9c2c0) The buggy address belongs to the page: page:ffffea000293a700 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002928588 ffffea0002875ac8 ffff88813bff0940 raw: 0000000000000000 ffff8880a4e9c0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a4e9bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a4e9c000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a4e9c080: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffff8880a4e9c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a4e9c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================