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Wed, 11 Sep 2024 02:44:23 -0700 (PDT) Date: Wed, 11 Sep 2024 02:44:23 -0700 In-Reply-To: <0000000000005093590621340ecf@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000bef3350621d4d5b4@google.com> Subject: Re: [syzbot] Re: [syzbot] [udf?] KASAN: slab-out-of-bounds Read in udf_get_filelongad (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [udf?] KASAN: slab-out-of-bounds Read in udf_get_filelongad (2) Author: zhaomengmeng@kylinos.cn On 2024/9/10 15:43, syzbot wrote: > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > WARNING in __udf_add_aext > > loop0: rw=0, sector=117, nr_sectors = 1 limit=0 > syz.0.15: attempt to access beyond end of device > loop0: rw=0, sector=117, nr_sectors = 1 limit=0 > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 5602 at fs/udf/inode.c:2043 __udf_add_aext+0x571/0x700 fs/udf/inode.c:2042 > Modules linked in: > CPU: 0 UID: 0 PID: 5602 Comm: syz.0.15 Not tainted 6.11.0-rc7-syzkaller-gbc83b4d1f086-dirty #0 > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:__udf_add_aext+0x571/0x700 fs/udf/inode.c:2042 > Code: 41 5f 5d c3 cc cc cc cc e8 5c d7 74 fe 90 0f 0b 90 e9 e7 fb ff ff e8 4e d7 74 fe 90 0f 0b 90 e9 54 fc ff ff e8 40 d7 74 fe 90 <0f> 0b 90 e9 45 fd ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c7 > RSP: 0018:ffffc900026b78f8 EFLAGS: 00010293 > RAX: ffffffff831eb570 RBX: 0000000000000120 RCX: ffff888000990000 > RDX: 0000000000000000 RSI: 0000000000000120 RDI: ffffffffffffff40 > RBP: 00000000bffffe00 R08: ffffffff831eb2b0 R09: ffffffff831eb066 > R10: 0000000000000002 R11: ffff888000990000 R12: ffffc900026b7b80 > R13: ffffffffffffff40 R14: dffffc0000000000 R15: 0000000000000010 > FS: 00007f2deb03b6c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fa084b2c000 CR3: 0000000054cbe000 CR4: 0000000000350ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > udf_add_aext fs/udf/inode.c:2104 [inline] > udf_do_extend_file+0xaf7/0x11e0 fs/udf/inode.c:540 > udf_extend_file fs/udf/inode.c:692 [inline] > udf_setsize+0xcc2/0x1320 fs/udf/inode.c:1265 > udf_setattr+0x3c7/0x5d0 fs/udf/file.c:236 > notify_change+0xbca/0xe90 fs/attr.c:503 > do_truncate fs/open.c:65 [inline] > do_ftruncate+0x46b/0x590 fs/open.c:181 > do_sys_ftruncate fs/open.c:199 [inline] > __do_sys_ftruncate fs/open.c:207 [inline] > __se_sys_ftruncate fs/open.c:205 [inline] > __x64_sys_ftruncate+0x95/0xf0 fs/open.c:205 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f2dea179eb9 > 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:00007f2deb03b038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d > RAX: ffffffffffffffda RBX: 00007f2dea315f80 RCX: 00007f2dea179eb9 > RDX: 0000000000000000 RSI: 0000008002007ffb RDI: 0000000000000005 > RBP: 00007f2dea1e793e R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000000 R14: 00007f2dea315f80 R15: 00007ffec4d97f58 > > > > Tested on: > > commit: bc83b4d1 Merge tag 'bcachefs-2024-09-09' of git://evil.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=10303f29980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=61d235cb8d15001c > dashboard link: https://syzkaller.appspot.com/bug?extid=7a4842f0b1801230a989 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > patch: https://syzkaller.appspot.com/x/patch.diff?x=1686f43b980000 > #syz test