On Wed, Apr 02, 2025 at 06:46:27AM -0700, syzbot wrote: > 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@xxxxxxxxxxxxxxxxxxxxxxxxx > > 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 This is issuing open on bpf: bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_DEVMAP, key_size=4, value_size=4, max_entries=3, map_flags=0, inner_map_fd=-1, map_name="", map_ifindex=0, btf_fd=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 openat(AT_FDCWD, "/proc/self/fd/3", O_RDWR) = ? +++ killed by SIGSEGV +++ I verified i_mode & S_ISFMT is 0. I don't know what expectation is, should this be some special dev instead?
