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BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: null-ptr-deref in test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
BUG: KASAN: null-ptr-deref in trylock_buffer include/linux/buffer_head.h:390 [inline]
BUG: KASAN: null-ptr-deref in lock_buffer include/linux/buffer_head.h:396 [inline]
BUG: KASAN: null-ptr-deref in udf_getblk fs/udf/inode.c:474 [inline]
BUG: KASAN: null-ptr-deref in udf_bread+0x29f/0x4b0 fs/udf/inode.c:1202
Write of size 8 at addr 0000000000000000 by task syz-executor.0/10231

CPU: 1 PID: 10231 Comm: syz-executor.0 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_report+0xe6/0x4f0 mm/kasan/report.c:398
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
 trylock_buffer include/linux/buffer_head.h:390 [inline]
 lock_buffer include/linux/buffer_head.h:396 [inline]
 udf_getblk fs/udf/inode.c:474 [inline]
 udf_bread+0x29f/0x4b0 fs/udf/inode.c:1202
 udf_add_entry+0x1d1e/0x3350 fs/udf/namei.c:495
 udf_mkdir+0x429/0xaa0 fs/udf/namei.c:698
 vfs_mkdir+0x3b6/0x590 fs/namei.c:4108
 do_mkdirat+0x225/0x360 fs/namei.c:4133
 __do_sys_mkdir fs/namei.c:4153 [inline]
 __se_sys_mkdir fs/namei.c:4151 [inline]
 __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4151
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2a2bc7cf29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2a2c9380c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f2a2bdb41f0 RCX: 00007f2a2bc7cf29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000340
RBP: 00007f2a2bcec074 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f2a2bdb41f0 R15: 00007fffd5ed32b8
 </TASK>
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