syzbot


WARNING in udf_prealloc_blocks

Status: upstream: reported on 2023/02/13 12:52
Subsystems: udf (incorrect?)
Reported-by: syzbot+a637b18b4c36f9892829@syzkaller.appspotmail.com
First crash: 44d, last: 28d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8228 at fs/udf/udfdecl.h:123 udf_add_free_space fs/udf/balloc.c:125 [inline]
WARNING: CPU: 1 PID: 8228 at fs/udf/udfdecl.h:123 udf_table_prealloc_blocks fs/udf/balloc.c:576 [inline]
WARNING: CPU: 1 PID: 8228 at fs/udf/udfdecl.h:123 udf_prealloc_blocks+0xf13/0x1310 fs/udf/balloc.c:709
Modules linked in:
CPU: 1 PID: 8228 Comm: syz-executor.1 Not tainted 6.2.0-syzkaller-10443-g8cbd92339db0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:121 [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+0xf13/0x1310 fs/udf/balloc.c:709
Code: 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 53 96 8b fe e9 4b f7 ff ff e8 49 96 8b fe 0f 0b e9 67 f8 ff ff e8 3d 96 8b fe <0f> 0b e9 c9 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 08 f2 ff ff
RSP: 0018:ffffc9000314f140 EFLAGS: 00010287
RAX: ffffffff83011643 RBX: 0000000063746800 RCX: 0000000000040000
RDX: ffffc9000b3c2000 RSI: 000000000001c377 RDI: 000000000001c378
RBP: ffffc9000314f2b0 R08: ffffffff83011506 R09: fffffbfff1ce8d1e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807de27cc0
R13: dffffc0000000000 R14: ffff888082ac301c R15: ffff88802a44c678
FS:  00007fb6a42b2700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcb1033628 CR3: 000000007d6d0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_prealloc_extents fs/udf/inode.c:1026 [inline]
 inode_getblk fs/udf/inode.c:884 [inline]
 udf_map_block+0x262c/0x4fd0 fs/udf/inode.c:438
 __udf_get_block+0x126/0x410 fs/udf/inode.c:452
 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2034
 __block_write_begin fs/buffer.c:2084 [inline]
 block_write_begin+0x9c/0x1f0 fs/buffer.c:2145
 udf_write_begin+0x10a/0x190 fs/udf/inode.c:256
 generic_perform_write+0x300/0x5e0 mm/filemap.c:3926
 __generic_file_write_iter+0x17a/0x400 mm/filemap.c:4054
 udf_file_write_iter+0x2fc/0x660 fs/udf/file.c:115
 call_write_iter include/linux/fs.h:1851 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7b2/0xbb0 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb6a348c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb6a42b2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb6a35abf80 RCX: 00007fb6a348c0f9
RDX: 000000000208e24b RSI: 00000000200001c0 RDI: 0000000000000004
RBP: 00007fb6a34e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff077e26cf R14: 00007fb6a42b2300 R15: 0000000000022000
 </TASK>

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-fs 2023/02/25 13:34 upstream 8cbd92339db0 ee50e71c .config console log report info [disk image] [vmlinux] [kernel image] WARNING in udf_prealloc_blocks
ci2-upstream-fs 2023/02/09 12:40 upstream 0983f6bf2bfc 14a312c8 .config console log report info [disk image] [vmlinux] [kernel image] WARNING in udf_prealloc_blocks
* Struck through repros no longer work on HEAD.