Message-ID: <67ed3fb3.050a0220.14623d.0009.GAE@google.com>
Date: Wed, 02 Apr 2025 06:46:27 -0700
From: syzbot <syzbot+5d8e79d323a13aa0b248@...kaller.appspotmail.com>
To: brauner@...nel.org, jack@...e.cz, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	viro@...iv.linux.org.uk
Subject: [syzbot] [fs?] kernel BUG in may_open

Hello,

syzbot found the following issue on:

HEAD commit:    08733088b566 Merge tag 'rust-fixes-6.15-merge' of git://gi..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10c8a178580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=acce2ca43d1e8c46
dashboard link: https://syzkaller.appspot.com/bug?extid=5d8e79d323a13aa0b248
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15bb094c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12c2b7b0580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2ec0ad16833c/disk-08733088.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/aaa58ee04595/vmlinux-08733088.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9799f5b55d91/bzImage-08733088.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5d8e79d323a13aa0b248@...kaller.appspotmail.com

VFS_BUG_ON_INODE(1) encountered for inode ffff888148c44000
------------[ cut here ]------------
kernel BUG at fs/namei.c:3432!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5828 Comm: syz-executor329 Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:may_open+0x450/0x460 fs/namei.c:3432
Code: 38 c1 0f 8c 95 fe ff ff 48 89 df e8 aa 3c eb ff e9 88 fe ff ff e8 10 b3 84 ff 4c 89 ef 48 c7 c6 c0 f6 58 8c e8 81 21 05 00 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90003ce78d8 EFLAGS: 00010246
RAX: 000000000000003a RBX: 00000000000fffff RCX: 8d133bf8e6cb7a00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffffff8ee96300 R08: ffffffff81a29bdc R09: 1ffff9200079ceb8
R10: dffffc0000000000 R11: fffff5200079ceb9 R12: 0000000000000006
R13: ffff888148c44000 R14: dffffc0000000000 R15: ffffc90003ce7ba0
FS:  0000555582428380(0000) GS:ffff888124fe2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056466efce608 CR3: 0000000033c36000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_open fs/namei.c:3843 [inline]
 path_openat+0x2b39/0x35d0 fs/namei.c:4004
 do_filp_open+0x284/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x249/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d8acfc7e1
Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 8a 88 07 00 00 74 6d 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 93 00 00 00 48 8b 54 24 28 64 48 2b 14 25
RSP: 002b:00007fff2f6ce680 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5d8acfc7e1
RDX: 0000000000000002 RSI: 00007fff2f6ce700 RDI: 00000000ffffff9c
RBP: 00007fff2f6ce700 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fff2f6ce938 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:may_open+0x450/0x460 fs/namei.c:3432
Code: 38 c1 0f 8c 95 fe ff ff 48 89 df e8 aa 3c eb ff e9 88 fe ff ff e8 10 b3 84 ff 4c 89 ef 48 c7 c6 c0 f6 58 8c e8 81 21 05 00 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90003ce78d8 EFLAGS: 00010246
RAX: 000000000000003a RBX: 00000000000fffff RCX: 8d133bf8e6cb7a00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffffff8ee96300 R08: ffffffff81a29bdc R09: 1ffff9200079ceb8
R10: dffffc0000000000 R11: fffff5200079ceb9 R12: 0000000000000006
R13: ffff888148c44000 R14: dffffc0000000000 R15: ffffc90003ce7ba0
FS:  0000555582428380(0000) GS:ffff888124fe2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056466efce608 CR3: 0000000033c36000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
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