------------[ cut here ]------------
WARNING: CPU: 0 PID: 4913 at fs/udf/truncate.c:208 udf_truncate_extents+0x9f0/0xb48 fs/udf/truncate.c:-1
Modules linked in:
CPU: 0 PID: 4913 Comm: syz.0.15 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : udf_truncate_extents+0x9f0/0xb48 fs/udf/truncate.c:-1
lr : udf_truncate_extents+0x9ec/0xb48 fs/udf/truncate.c:208
sp : ffff80001f166dc0
x29: ffff80001f166f40 x28: 0000000007e55e62 x27: 00000000000000ff
x26: ffff0000e2598e78 x25: ffff0000e2598d10 x24: ffff700003e2cdc8
x23: 0000000000000010 x22: 00000000000000ff x21: ffff80001f166e60
x20: ffff80001f166e40 x19: ffff0000e2598e28 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000097582b0 x15: 0000000000000001
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800009771bbc
x8 : ffff0000c14e51c0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001
 x3 : 0000000000000001

x2 : ffff80001f166e68
 x1 : 0000000007e55e62
 x0 : 0000000000000000

Call trace:
 udf_truncate_extents+0x9f0/0xb48 fs/udf/truncate.c:-1
 udf_do_extend_file+0xb04/0xdd4 fs/udf/inode.c:501
 inode_getblk fs/udf/inode.c:708 [inline]
 udf_get_block+0xc64/0x3468 fs/udf/inode.c:358
 __block_write_begin_int+0x3d8/0x1530 fs/buffer.c:2012
 __block_write_begin fs/buffer.c:2062 [inline]
 block_write_begin+0x60/0xdc fs/buffer.c:2122
 udf_write_begin+0x50/0x98 fs/udf/inode.c:212
 generic_perform_write+0x208/0x488 mm/filemap.c:3785
 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912
 udf_file_write_iter+0x218/0x46c fs/udf/file.c:163
 do_iter_readv_writev+0x3a8/0x50c fs/read_write.c:-1
 do_iter_write+0x1c4/0x670 fs/read_write.c:855
 vfs_writev fs/read_write.c:928 [inline]
 do_pwritev+0x1e8/0x338 fs/read_write.c:1025
 __do_sys_pwritev2 fs/read_write.c:1084 [inline]
 __se_sys_pwritev2 fs/read_write.c:1075 [inline]
 __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1075
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 268
hardirqs last  enabled at (267): [<ffff8000089cbdac>] lookup_bh_lru fs/buffer.c:1294 [inline]
hardirqs last  enabled at (267): [<ffff8000089cbdac>] __find_get_block+0x1c4/0xcb0 fs/buffer.c:1306
hardirqs last disabled at (268): [<ffff8000112561f8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (220): [<ffff800008031f94>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (218): [<ffff800008031f60>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace b1e32edd38b387cf ]---