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WARNING in __udf_add_aext (3)

Status: upstream: reported C repro on 2024/04/08 08:26
Subsystems: udf
[Documentation on labels]
Reported-by: syzbot+799a0e744ac47f928024@syzkaller.appspotmail.com
First crash: 649d, last: 3h27m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (20)
Title Replies (including bot) Last reply
[syzbot] Monthly udf report (Dec 2025) 0 (1) 2025/12/29 10:37
[syzbot] Monthly udf report (Oct 2025) 0 (1) 2025/10/27 12:50
[syzbot] Monthly udf report (Sep 2025) 0 (1) 2025/09/26 05:14
[syzbot] Monthly udf report (Aug 2025) 0 (1) 2025/08/26 07:14
[syzbot] Monthly udf report (Jul 2025) 0 (1) 2025/07/26 20:43
[syzbot] Monthly udf report (Jun 2025) 0 (1) 2025/06/24 13:54
[syzbot] Monthly udf report (May 2025) 0 (1) 2025/05/24 10:05
[syzbot] Monthly udf report (Apr 2025) 0 (1) 2025/04/23 07:50
[syzbot] Monthly udf report (Mar 2025) 0 (1) 2025/03/23 02:26
[syzbot] Monthly udf report (Feb 2025) 0 (1) 2025/02/19 12:35
[syzbot] Monthly udf report (Jan 2025) 0 (1) 2025/01/20 08:14
[syzbot] Monthly udf report (Dec 2024) 0 (1) 2024/12/19 18:40
[syzbot] Monthly udf report (Nov 2024) 0 (1) 2024/11/18 10:47
[syzbot] Monthly udf report (Oct 2024) 0 (1) 2024/10/17 07:41
[syzbot] Monthly udf report (Sep 2024) 0 (1) 2024/09/16 12:28
[syzbot] Monthly udf report (Aug 2024) 0 (1) 2024/08/16 09:47
[syzbot] Monthly udf report (Jul 2024) 0 (1) 2024/07/16 07:38
[syzbot] Monthly udf report (Jun 2024) 0 (1) 2024/06/15 17:49
[syzbot] Monthly udf report (May 2024) 0 (1) 2024/05/14 20:49
[syzbot] [udf?] WARNING in __udf_add_aext (3) 0 (1) 2024/04/08 08:26
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in __udf_add_aext origin:upstream -1 C done 134 14d 880d 0/3 upstream: reported C repro on 2023/08/20 05:08
linux-4.14 WARNING in __udf_add_aext udf -1 C 3 1050d 1428d 0/1 upstream: reported C repro on 2022/02/18 06:47
linux-6.6 WARNING in __udf_add_aext origin:upstream -1 C 11 3d05h 169d 0/2 upstream: reported C repro on 2025/07/30 23:41
linux-4.19 WARNING in __udf_add_aext udf -1 C error 20 1061d 1462d 0/1 upstream: reported C repro on 2022/01/14 21:09
upstream WARNING in __udf_add_aext udf -1 C error 170 956d 1193d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in __udf_add_aext (2) udf -1 syz error done 6 767d 947d 25/29 fixed on 2024/01/30 15:47
linux-6.1 WARNING in __udf_add_aext origin:lts-only -1 C done 137 5d07h 830d 0/3 upstream: reported C repro on 2023/10/08 20:16

Sample crash report:
loop0: detected capacity change from 0 to 2048
UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
------------[ cut here ]------------
WARNING: fs/udf/inode.c:2088 at __udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087, CPU#1: syz.0.17/5984
Modules linked in:
CPU: 1 UID: 0 PID: 5984 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Code: cd e6 fe 49 8b 3e 4c 89 e6 e8 28 fc 0a ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1e f4 cf fd cc e8 4d ab 80 fe 90 <0f> 0b 90 e9 14 fc ff ff e8 3f ab 80 fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc90003447808 EFLAGS: 00010293
RAX: ffffffff83404cf3 RBX: dffffc0000000000 RCX: ffff8880250c9e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001d0
RBP: 1ffff92000688f69 R08: ffff8880250c9e80 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000001d0
R13: 0000000000000000 R14: ffffc90003447b40 R15: ffffc90003447b48
FS:  000055559078d500(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd63fff CR3: 0000000075ad7000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x609/0x800 fs/udf/inode.c:2050
 udf_add_aext fs/udf/inode.c:2140 [inline]
 udf_do_extend_file+0x870/0x1180 fs/udf/inode.c:591
 udf_extend_file fs/udf/inode.c:712 [inline]
 udf_setsize+0xb78/0x1000 fs/udf/inode.c:1300
 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:236
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 do_ftruncate+0x4a5/0x560 fs/open.c:195
 do_sys_ftruncate fs/open.c:207 [inline]
 __do_sys_ftruncate fs/open.c:212 [inline]
 __se_sys_ftruncate fs/open.c:210 [inline]
 __x64_sys_ftruncate+0x92/0xf0 fs/open.c:210
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7dd1b8f749
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:00007fff6bb3ad88 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f7dd1de5fa0 RCX: 00007f7dd1b8f749
RDX: 0000000000000000 RSI: 0000008002007ffb RDI: 0000000000000004
RBP: 00007f7dd1c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7dd1de5fa0 R14: 00007f7dd1de5fa0 R15: 0000000000000002
 </TASK>

Crashes (1532):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/13 12:38 upstream b71e635feefc d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/12/06 08:25 upstream 7203ca412fc8 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/07/26 03:14 upstream 327579671a9b fb8f743d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/04/22 15:00 upstream a33b5a08cbbd 2a20f901 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)] [mounted in repro #3] [mounted in repro #4] [mounted in repro #5 (corrupt fs)] [mounted in repro #6] ci2-upstream-fs WARNING in __udf_add_aext
2025/04/22 09:43 upstream a33b5a08cbbd 2a20f901 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)] [mounted in repro #3] [mounted in repro #4 (clean fs)] ci2-upstream-fs WARNING in __udf_add_aext
2024/11/23 04:28 upstream 06afb0f36106 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __udf_add_aext
2024/07/22 19:24 upstream 933069701c1b f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2024/07/22 18:46 upstream 933069701c1b f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/12/07 09:14 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/27 12:26 upstream 4941a17751c9 e8331348 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/24 01:56 upstream d0e88704d96c 4fb8ef37 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/15 10:42 upstream 7a0892d2836e f7988ea4 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/08/06 02:19 upstream 6bcdbd62bd56 ffe1dd46 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/06/08 17:17 upstream 8630c59e9936 4826c28e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/10/24 08:02 upstream c2ee9f594da8 15fa2979 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/13 18:59 linux-next d9771d0dbe18 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/07/22 18:00 linux-next 41c196e567fb f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/07/22 17:26 linux-next 41c196e567fb f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/04/06 13:10 linux-next 8568bb2ccc27 ca620dd8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/08/17 06:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5c43d43bad35 76120936 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2024/10/29 19:24 upstream e42b1a9a2557 66aeb999 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __udf_add_aext
2025/04/20 07:53 upstream 119009db2674 2a20f901 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/08/17 00:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5c43d43bad35 76120936 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2026/01/06 13:41 upstream 7f98ab9da046 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/12/28 16:46 upstream d26143bb38e2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/12/26 08:22 upstream ccd1cdca5cd4 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/09/26 12:22 upstream 4ff71af020ae 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __udf_add_aext
2025/09/17 15:17 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __udf_add_aext
2024/06/24 14:20 upstream f2661062f16b edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in __udf_add_aext
2024/06/17 08:06 upstream 2ccbdf43d5e7 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in __udf_add_aext
2026/01/16 09:00 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/16 01:09 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/15 21:16 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/15 18:01 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/15 11:48 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/15 01:56 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/15 00:03 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/14 22:52 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/14 19:09 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/14 17:47 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/13 07:43 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/12 18:27 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/11 05:29 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/10 15:36 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/09 01:57 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/08 17:20 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/07 11:52 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/06 09:38 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/05 23:20 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/04 23:44 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/03 11:37 upstream 805f9a061372 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2026/01/01 03:02 upstream 349bd28a86f2 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/31 17:49 upstream c8ebd433459b d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/30 04:45 upstream 8640b74557fc d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/30 03:19 upstream 8640b74557fc d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/28 06:47 upstream d26143bb38e2 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/26 12:41 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/25 22:45 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/25 18:23 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/25 09:42 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/25 03:29 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/24 23:29 upstream ccd1cdca5cd4 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/23 07:34 upstream b927546677c8 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/21 18:38 upstream 9094662f6707 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/20 06:59 upstream dd9b004b7ff3 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/19 21:07 upstream dd9b004b7ff3 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/06/25 03:06 upstream 626737a5791b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __udf_add_aext
2025/12/30 13:47 linux-next cc3aa43b44bd d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2026/01/09 17:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2026/01/07 04:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8c40f11c7b0 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/29 06:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/28 10:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/21 20:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
* Struck through repros no longer work on HEAD.