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WARNING in udf_free_blocks (2)

Status: upstream: reported C repro on 2025/01/12 10:23
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+eee8568c73f195a7d8fa@syzkaller.appspotmail.com
First crash: 74d, last: 11d
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2025/01/12 upstream (ToT) b62cef9a5c67 C [report] KASAN: use-after-free Read in udf_unlink
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in udf_free_blocks 1 81d 81d 0/3 upstream: reported on 2025/01/05 10:15
linux-5.15 WARNING in udf_free_blocks 1 318d 318d 0/3 auto-obsoleted due to no activity on 2024/08/21 03:04
upstream WARNING in udf_free_blocks (2) udf 1 463d 461d 0/28 auto-obsoleted due to no activity on 2024/03/29 02:59
upstream WARNING in udf_free_blocks udf 6 593d 711d 0/28 auto-obsoleted due to no activity on 2023/11/20 09:23
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/03/16 01:53 9m retest repro linux-5.15.y report log
2025/03/16 01:53 13m retest repro linux-5.15.y report log
2025/01/26 14:52 57m retest repro linux-5.15.y report log
2025/01/26 14:52 15m retest repro linux-5.15.y report log
2025/01/26 14:52 10m retest repro linux-5.15.y report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4162 at fs/udf/udfdecl.h:127 udf_add_free_space fs/udf/balloc.c:137 [inline]
WARNING: CPU: 0 PID: 4162 at fs/udf/udfdecl.h:127 udf_table_free_blocks fs/udf/balloc.c:397 [inline]
WARNING: CPU: 0 PID: 4162 at fs/udf/udfdecl.h:127 udf_free_blocks+0x1d2c/0x21e0 fs/udf/balloc.c:686
Modules linked in:
CPU: 1 PID: 4162 Comm: syz-executor295 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
RIP: 0010:udf_add_free_space fs/udf/balloc.c:137 [inline]
RIP: 0010:udf_table_free_blocks fs/udf/balloc.c:397 [inline]
RIP: 0010:udf_free_blocks+0x1d2c/0x21e0 fs/udf/balloc.c:686
Code: d5 e6 fe e9 d1 e3 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 3d e4 ff ff 48 89 df e8 6e d5 e6 fe e9 30 e4 ff ff e8 24 e3 9c fe <0f> 0b e9 c5 ed ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 58 e4
RSP: 0018:ffffc90002cef560 EFLAGS: 00010293
RAX: ffffffff82e3b99c RBX: 00000000ee99272d RCX: ffff888022c25940
RDX: 0000000000000000 RSI: 00000000ee99272d RDI: 0000000000000000
RBP: ffffc90002cef770 R08: ffffffff82e3a75b R09: fffff5200059de69
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90002cef690
R13: dffffc0000000000 R14: ffff88807b56b01c R15: ffff88806fc21490
FS:  00005555814fd380(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc36815f88 CR3: 00000000799b9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 extent_trunc+0x38c/0x4a0 fs/udf/truncate.c:56
 udf_truncate_extents+0x3f6/0x11a0 fs/udf/truncate.c:212
 udf_setsize+0x100a/0x1430 fs/udf/inode.c:1183
 udf_evict_inode+0x79/0x3d0 fs/udf/inode.c:145
 evict+0x529/0x930 fs/inode.c:647
 do_unlinkat+0x508/0x950 fs/namei.c:4355
 __do_sys_unlink fs/namei.c:4396 [inline]
 __se_sys_unlink fs/namei.c:4394 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4394
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2c321b3c57
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc368161e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2c321b3c57
RDX: 00007ffc36816210 RSI: 00007ffc368162a0 RDI: 00007ffc368162a0
RBP: 00007ffc368162a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc36817390
R13: 000055558150e740 R14: 431bde82d7b634db R15: 00007ffc36819510
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/16 03:05 linux-5.15.y 0c935c049b5c e2826670 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/02/27 13:34 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/02/26 12:41 linux-5.15.y c16c81c81336 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/01/12 11:46 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/01/12 11:06 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/01/12 10:23 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan WARNING in udf_free_blocks
2025/02/22 20:57 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_free_blocks
* Struck through repros no longer work on HEAD.