UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 7970 Comm: syz-executor248 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff888097efe340 task.stack: ffff8880a3238000 RIP: 0010:crc_itu_t+0x40/0xc0 lib/crc-itu-t.c:62 RSP: 0018:ffff8880a323f9a0 EFLAGS: 00010206 RAX: 0000000000000004 RBX: 000000000000a489 RCX: 0000000000000000 RDX: 0000000000000006 RSI: 0000000000000026 RDI: 0000000000000026 RBP: 00000000000000bc R08: 0000000000000001 R09: ffff88808f271c03 R10: ffff88808f271c03 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000027 R14: ffff88808ffd02a0 R15: 00000000000000bc FS: 0000555556ef5300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056465fc4972c CR3: 00000000a588f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: udf_write_fi+0x6c7/0xe80 fs/udf/namei.c:113 udf_rename+0xcab/0x1180 fs/udf/namei.c:1194 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f995df428c9 RSP: 002b:00007fffd7d04438 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f995df428c9 RDX: 0000000000000005 RSI: 00000000200001c0 RDI: 0000000000000005 RBP: 00007f995df02160 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 00007f995df021f0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 48 85 ed 74 7c 49 bc 00 00 00 00 00 fc ff df 4c 01 ed e8 04 a1 3a fe 4c 89 ef 49 83 c5 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 20 38 d0 7f 04 84 c0 75 59 44 0f b7 f3 0f b6 df 41 RIP: crc_itu_t+0x40/0xc0 lib/crc-itu-t.c:62 RSP: ffff8880a323f9a0 ---[ end trace ad3afe9f2cfebb01 ]--- ---------------- Code disassembly (best guess): 0: 48 85 ed test %rbp,%rbp 3: 74 7c je 0x81 5: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 c: fc ff df f: 4c 01 ed add %r13,%rbp 12: e8 04 a1 3a fe callq 0xfe3aa11b 17: 4c 89 ef mov %r13,%rdi 1a: 49 83 c5 01 add $0x1,%r13 1e: 48 89 f8 mov %rdi,%rax 21: 48 89 fa mov %rdi,%rdx 24: 48 c1 e8 03 shr $0x3,%rax 28: 83 e2 07 and $0x7,%edx * 2b: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 30: 38 d0 cmp %dl,%al 32: 7f 04 jg 0x38 34: 84 c0 test %al,%al 36: 75 59 jne 0x91 38: 44 0f b7 f3 movzwl %bx,%r14d 3c: 0f b6 df movzbl %bh,%ebx 3f: 41 rex.B