syzbot


WARNING in udf_prealloc_blocks

Status: upstream: reported on 2024/05/13 23:08
Reported-by: syzbot+ac959d323f0a5fa55cc9@syzkaller.appspotmail.com
First crash: 42d, last: 42d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in udf_prealloc_blocks (2) udf 3 177d 221d 0/27 auto-obsoleted due to no activity on 2024/04/08 05:40
upstream WARNING in udf_prealloc_blocks udf 7 403d 497d 0/27 auto-obsoleted due to no activity on 2023/08/26 06:23

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6028 at fs/udf/udfdecl.h:116 udf_add_free_space fs/udf/balloc.c:125 [inline]
WARNING: CPU: 1 PID: 6028 at fs/udf/udfdecl.h:116 udf_table_prealloc_blocks fs/udf/balloc.c:576 [inline]
WARNING: CPU: 1 PID: 6028 at fs/udf/udfdecl.h:116 udf_prealloc_blocks+0xf0b/0x1310 fs/udf/balloc.c:709
Modules linked in:
CPU: 1 PID: 6028 Comm: syz-executor.2 Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:114 [inline]
RIP: 0010:udf_add_free_space fs/udf/balloc.c:125 [inline]
RIP: 0010:udf_table_prealloc_blocks fs/udf/balloc.c:576 [inline]
RIP: 0010:udf_prealloc_blocks+0xf0b/0x1310 fs/udf/balloc.c:709
Code: 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 db 45 8e fe e9 4f f7 ff ff e8 d1 45 8e fe 0f 0b e9 6b f8 ff ff e8 c5 45 8e fe <0f> 0b e9 c9 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 0c f2 ff ff
RSP: 0000:ffffc90004eb72e0 EFLAGS: 00010283
RAX: ffffffff82fc478b RBX: 00000000f93dbffe RCX: 0000000000040000
RDX: ffffc90005da4000 RSI: 0000000000015b6f RDI: 0000000000015b70
RBP: ffffc90004eb7450 R08: ffffffff82fc464e R09: fffffbfff1ce7046
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807da5b8c0
R13: dffffc0000000000 R14: ffff888051e1801c R15: ffff888075b5e678
FS:  00007ff1cad826c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff1c081f000 CR3: 0000000017e75000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_prealloc_extents fs/udf/inode.c:1022 [inline]
 inode_getblk fs/udf/inode.c:881 [inline]
 udf_get_block+0x268c/0x5360 fs/udf/inode.c:449
 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x98/0x1f0 fs/buffer.c:2102
 udf_write_begin+0x2d/0x60 fs/udf/inode.c:212
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3817
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3945
 udf_file_write_iter+0x291/0x670 fs/udf/file.c:164
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7ae/0xba0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff1ca07dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff1cad820c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff1ca1abf80 RCX: 00007ff1ca07dd69
RDX: 0000000000010010 RSI: 000000002000e0c0 RDI: 000000000000000a
RBP: 00007ff1ca0ca49e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff1ca1abf80 R15: 00007ffc63da1538
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/13 23:08 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in udf_prealloc_blocks
* Struck through repros no longer work on HEAD.