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:00007fec8e89d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fec8dbe5fa0 RCX: 00007fec8d98f749 RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000006 RBP: 00007fec8e89d090 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fec8dbe6038 R14: 00007fec8dbe5fa0 R15: 00007fff288eba88 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7163 at fs/udf/truncate.c:224 udf_truncate_extents+0xd4c/0xec0 fs/udf/truncate.c:224 Modules linked in: CPU: 0 UID: 0 PID: 7163 Comm: syz.2.298 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:udf_truncate_extents+0xd4c/0xec0 fs/udf/truncate.c:224 Code: f6 2f 0f 48 3b 84 24 80 01 00 00 75 77 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 66 c7 d1 fd cc e8 15 8a 81 fe 90 <0f> 0b 90 eb 88 44 89 e9 80 e1 07 38 c1 0f 8c e4 f3 ff ff 4c 89 ef RSP: 0018:ffffc9000a8ff7a0 EFLAGS: 00010293 RAX: ffffffff833e79ab RBX: 1ffff1100a0360d2 RCX: ffff8880250b8000 RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000000 RBP: ffffc9000a8ff968 R08: ffff8880250b8000 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 000000000000000a R15: 000000000000000a FS: 00007fec8e89d6c0(0000) GS:ffff888126139000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fec8e87cd58 CR3: 000000007a629000 CR4: 0000000000350ef0 Call Trace: udf_write_failed+0x185/0x1c0 fs/udf/inode.c:178 udf_direct_IO+0x1c6/0x200 fs/udf/inode.c:314 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4188 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4357 udf_file_write_iter+0x2d5/0x6c0 fs/udf/file.c:111 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1 vfs_writev+0x31a/0x960 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fec8d98f749 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:00007fec8e89d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fec8dbe5fa0 RCX: 00007fec8d98f749 RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000006 RBP: 00007fec8e89d090 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fec8dbe6038 R14: 00007fec8dbe5fa0 R15: 00007fff288eba88 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 ret 32: 48 c7 c1 a8 ff ff ff mov $0xffffffffffffffa8,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W